JP2020128252A - Packaging box - Google Patents

Abstract

To provide a packaging box capable of easily sealing again.SOLUTION: A packaging box 1 includes a peripheral wall 1W including a pair of side walls 10, a bottom wall and a top wall 12 and formed in a cylindrical shape, a pair of inner flaps connected to an end portion of the pair of side walls 10 and closing a part of an end face of the peripheral wall 1W, a pair of outer flaps 14, 15 connected to an end portions of the bottom wall and the top wall 12 and fixed to an outer face of the inner flaps, a pair of engagement cutting lines 21 extending from a boundary of the side wall 10 to a tip end of the inner flap in the inner flap and forming an engagement piece 31 by cutting the inner flap in a band shape, and an engagement hole portion 26A formed in the pair of outer flap 14, 15 and engaged by the engaging piece 31 from outside. The pair of outer flaps 14, 15 are bonded to the inner flaps at a position avoiding the engaging piece 31.SELECTED DRAWING: Figure 7

Description

The present invention relates to a packaging box.

The cardboard box described in Patent Document 1 extends from each side edge of the top surface plate and a rectangular tubular portion in which a first side wall, a bottom plate, a second side wall, a top plate and a glue margin part are arranged in this order. A pair of upper outer flaps, a pair of lower outer flaps extending from each edge of the bottom plate, and two pairs of inner flaps extending from each edge of each side wall. A first breaking guide wire is provided in the glue margin portion and the top surface portion along the circumferential direction of the rectangular tubular portion. One upper outer flap is provided with a second breaking guide wire that is broken to form a long hole-shaped perforation. One of the inner flaps is provided with a third breaking guide wire that is broken to form a U-shaped projection that can be engaged with and disengaged from the perforation.

JP, 2014-97810, A

The above cardboard box is opened by breaking the top plate and the glue margin along the first breaking guide line. The opened cardboard box is closed again by closing the top plate and inserting the protrusion into the perforation. However, in the above cardboard box, since the U-shaped area in which the third breaking guide wire is closed is defined, it takes time and labor to hollow the protrusion from the inner flap along the third breaking guide wire, and I couldn't do the sealing easily.

The present invention provides a packaging box that can be easily resealed in order to solve the above problems.

In order to achieve the above-mentioned object, the packaging box of the present invention includes a peripheral wall formed in a tubular shape having a pair of first walls and a pair of second walls, and an end portion of the pair of first walls. A pair of inner flaps that are connected to each other and close at least a part of the end surfaces of the peripheral wall; a pair of outer flaps that are connected to the end portions of the pair of second walls and fixed to the outer surface of the inner flap; A pair of engagement cut lines that extend from a boundary with the first wall to a tip of the inner flap in at least one of the pair of inner flaps, and that cut the inner flap into strips to form engagement pieces; An engaging hole portion formed on at least one of the pair of outer flaps, the engaging piece engaging with the engaging piece from the outside of the outer flap; and the pair of outer flaps are located at a position avoiding the engaging piece. Is joined to the inner flap.

In this case, the inner flap is divided into the engagement piece and a pair of side portions located on both sides of the engagement piece by the pair of engagement cut lines, and the pair of outer flaps are Bonded to a pair of side parts, between the pair of side parts and the first wall, a pair of separation cutting lines are formed, and when opening the packaging box, the pair of side parts, respectively, It is preferable to open along with the outer flap while cutting along the engagement cut line and the separation cut line.

In this case, the pair of inner flaps are respectively connected to both end portions of the pair of first walls, and the pair of outer flaps are continuously connected to both end portions of the pair of second walls, respectively. It is preferable that a box dividing line portion is provided on the wall and the pair of inner flaps so as to pass through the engaging piece in a direction intersecting the circumferential direction of the peripheral wall.

In this case, the pair of outer flaps are fixed to the pair of inner flaps in a state where the tip portions are abutted with each other, and the engagement hole portion is formed so as to face the tip side of the pair of outer flaps. The pair of outer flaps are opened by cutting the pair of outer flaps along the hole forming cutting line, and the engaging piece overlaps the abutting portion of the pair of outer flaps and engages with the engaging hole portion. preferable.

In other cases, the pair of outer flaps are fixed to the pair of inner flaps in a state where the front end portions are abutted with each other, and the engagement hole portion is formed so as to be hollowed on the front end side of the pair of outer flaps. It is preferable that the engagement piece is configured by a pair of notches, and the engagement piece overlaps the abutting portion of the pair of outer flaps and engages with the pair of notches.

In this case, the engagement piece is connected to the engagement shaft portion extending from the boundary with the first wall toward the tip and the tip end portion of the engagement shaft portion, and is connected to the engagement hole portion. An engaging protrusion to be inserted, wherein the engaging protrusion has a shape in which the width gradually narrows from the base end portion wider than the tip end portion of the engagement shaft portion toward the tip. It is preferable that a base end portion of the portion engages with an edge portion of the engagement hole portion.

According to the present invention, resealing of a packaging box can be easily performed.

It is a perspective view showing a packaging box concerning a 1st embodiment of the present invention. It is a top view which shows the blank of the packaging box which concerns on 1st Embodiment of this invention. It is a top view which expands and shows a part of blank of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the front part of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which opened the front end surface of the packaging box which concerns on 1st Embodiment of this invention. It is a packaging box which concerns on 1st Embodiment of this invention, It is a perspective view which shows the state opened using the cut tape. It is a perspective view showing the state where the front end face of the packaging box concerning a 1st embodiment of the present invention was resealed. It is a top view which shows the blank of the packaging box which concerns on the 1st modification of 1st Embodiment of this invention. It is a perspective view which shows the front part of the packaging box which concerns on the 3rd modification of 1st Embodiment of this invention. It is a perspective view which shows the front part of the packaging box which concerns on the 4th modification of 1st Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 2nd Embodiment of this invention. It is a perspective view showing the state where the front end face of the packaging box concerning a 2nd embodiment of the present invention was resealed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates " “Up” and “D” indicate “down”. The front-back direction is orthogonal to the vertical direction, and the left-right direction is orthogonal to the front-back direction and the vertical direction. In the present specification, terms indicating directions and positions are used, but those terms are used for convenience of description and do not limit the technical scope of the present invention.

[First Embodiment: Outline of Packaging Box]
The configuration of the packaging box 1 according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is a plan view showing the blank 5 of the packaging box 1. FIG. 3 is an enlarged plan view showing a part of the blank 5 of the packaging box 1.

As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape by closing both end surfaces of a peripheral wall 1W formed in a substantially rectangular tube shape with a plurality of flaps 13-15. The packaging box 1 is a wrap-around type box that is wrapped around contents (not shown) to wrap the contents.

The packaging box 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed, for example, by punching out a single cardboard sheet made of paper with a punch or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 5) are attached to the front and back of a corrugated center lining 9A. 2 shows the front liner 9B side (the surface (outer surface) side of the packaging box 1). In the present specification, a direction parallel to the center corrugated board 9A of the corrugated board is referred to as a "step direction", and a direction orthogonal to the step direction (center corrugated 9A) is referred to as a "flow direction". In the drawings, "X" indicates "step direction" and "Y" indicates "flow direction". Further, in the present specification, the terms “top (top)”, “bottom (bottom)” and the like refer to top (top), bottom (bottom) and this in a state (assembled state) of the packaging box 1. Refers to a concept similar to.

[blank]
As shown in FIG. 2, the blank 5 includes a pair of side walls 10 (first wall), a bottom wall 11 (second wall), a ceiling wall 12 (second wall), four inner flaps 13, and It has two lower outer flaps 14 and two upper outer flaps 15.

<Side wall, bottom wall, ceiling wall>
The pair of side walls 10, the bottom wall 11 and the top wall 12 are alternately arranged in the step direction and are continuously provided via the first folding curve L1. Each side wall 10 is formed in a substantially rectangular shape that is longer in the flow direction than in the step direction. The bottom wall 11 and the top wall 12 are each formed in a substantially rectangular shape that is longer than the side wall 10 in the step direction. A passage piece 16 is continuously provided on the side wall 10 at the end in the flow direction via the first folding curve L1.

<Inner flap, lower outer flap, upper outer flap>
The four inner flaps 13 are connected to both ends of the pair of side walls 10 in the flow direction via the second folding curve L2. Each inner flap 13 is formed in a substantially rectangular shape, and its dimension in the flow direction (extension dimension) is set to approximately half the dimension in the step direction of the side wall 10. The two lower outer flaps 14 are connected to both ends of the bottom wall 11 in the flow direction via the second folding curve L2. The two upper outer flaps 15 are connected to both ends of the ceiling wall 12 in the flow direction via the second folding curve L2. Each of the lower outer flaps 14 and each of the upper outer flaps 15 are formed in a substantially rectangular shape, and their dimension in the flow direction (extension dimension) is set to be substantially the same as the extension dimension of the inner flap 13.

In the vicinity of the center of each upper outer flap 15, a substantially C-shaped hand-cut line 17 and a hand-folded curve 17L connecting both ends of the hand-cut line 17 are formed. By bending the part surrounded by the hand-cut line 17 inward along the hand-folding curve 17L, a hand-holding hole 17A for the user to hold his/her hand is opened (see FIG. 4). In addition, a substantially semicircular escape hole 13A is cut out at the tip of each inner flap 13 so as to avoid the hand cutting line 17 (hand hole 17A) when the packaging box 1 is assembled.

<Cutting structure>
Each inner flap 13, each lower outer flap 14, and each upper outer flap 15 are provided with a cutting structure 20 having a function of facilitating the opening of the packaging box 1 and a function of resealing the opened packaging box 1. Has been done.

As shown in FIG. 2, the cutting structure 20 includes two pairs of engaging cutting lines 21, two pairs of first separating cutting lines 22, two dividing cutting lines 23, and two second separating lines. A cutting line 24, four opening start line pairs 25, and four hole forming cutting lines 26 are provided. The two inner flaps 13 connected to one side wall 10 and the two inner flaps 13 connected to the other side wall 10 are point-symmetrical with the center of the bottom wall 11 as a point of symmetry. Therefore, in the following description, mainly referring to FIG. 3, attention is paid to the two inner flaps 13 that are continuously provided on the side wall 10 on the passage piece 16 side. Further, the two lower outer flaps 14 have a shape which is line-symmetrical to the two upper outer flaps 15 with the side wall 10 as the center, except that there is no hand cut line 17 or the like. , FIG. 3, attention is paid to the two lower outer flaps 14.

(Engagement disconnection line)
As shown in FIG. 3, the pair of engagement cut lines 21 extend from the boundary (the second fold curve L2) with the side wall 10 to the inner flap 13 in the region of the one inner flap 13 (upper side in FIG. 3) in the center of the step direction. Has been extended to the tip of. To be precise, a concave portion 30 that is recessed from the distal end toward the proximal end is formed in the stepwise central portion of the inner flap 13, and the pair of engagement cut lines 21 extends from the second folding curve L2 to the concave portion 30. It is set up. The pair of engagement cut lines 21 are arranged at intervals in the step direction and have a shape that is line-symmetrical (vertical symmetry) in the step direction.

Each engagement cutting line 21 is a zipper formed by arranging a plurality of linear cuts, bent cuts, and the like. The pair of engagement cutting lines 21 includes a pair of axis line portions 21A and a pair of bending line portions 21B. The pair of axis portions 21A extend from the second folding curve L2 toward the recess 30 while inclining in a direction toward each other. The pair of bent line portions 21B extend from the tips of the pair of axis portions 21A so as to be separated from each other, and then bend to the tip side and extend to the recess 30 while being inclined in a direction toward each other.

Each engagement cutting line 21 is formed so that the cutting of the inner flap 13 progresses toward both sides from a linear cut near the center of the shaft portion 21A. The pair of engagement cut lines 21 cut the inner flap 13 into strips to form the engagement pieces 31. Further, one inner flap 13 is partitioned by a pair of engagement cut lines 21 into an engagement piece 31 and a pair of side portions 32 located on both sides of the engagement piece 31.

The engagement piece 31 includes an engagement shaft portion 31A formed between the pair of axis portions 21A and an engagement protrusion portion 31B formed between the pair of bent line portions 21B. The engagement shaft portion 31A extends from the boundary with the side wall 10 (the second folding curve L2) toward the tip. The engagement shaft portion 31A is formed in a substantially trapezoidal shape in which the width gradually narrows from the base end toward the tip. The engagement protrusion 31B is connected to the tip of the engagement shaft 31A via an engagement fold line 31L. The engagement protrusion 31B is formed in a substantially trapezoidal shape in which the width gradually narrows from the base end to the tip. The base end portion (maximum width portion) of the engagement protrusion 31B has substantially the same width as the base end portion of the engagement shaft portion 31A, and is formed wider than the tip end portion of the engagement shaft portion 31A. The tip end portion of the engagement protrusion 31B is formed to be narrower than the base end portion of the engagement shaft portion 31A and wider than the tip end portion (engagement folding line 31L) of the engagement shaft portion 31A.

(First separation cutting line)
The pair of first separation cutting lines 22 are formed between the pair of side portions 32 and the side wall 10. To be precise, the pair of first separation cut lines 22 are formed on the second folding line L2 excluding the connection range of the engagement pieces 31 and the outer sides in the flow direction of the pair of side portions 32. Each of the first separation cutting lines 22 is a zipper formed by arranging a plurality of bent cut lines and the like. The pair of first separation cutting lines 22 are formed so that the cutting of the pair of side portions 32 progresses from the engagement piece 31 side toward both sides in the flow direction.

(Division cutting line)
The division cutting line 23 extends from the boundary (second folding line L2) with the side wall 10 in the other inner flap 13 (lower side in FIG. 3) to the tip of the inner flap 13. To be precise, the division cutting line 23 is formed on the escape hole 13A side (upper side in the assembled state of the packaging box 1) with respect to the center of the inner flap 13 in the step direction. The tip portion of the inner flap 13 is cut with a missing portion 33, and the division cutting line 23 extends from the second folding curve L2 to the missing portion 33. The division cutting line 23 is a zipper formed by arranging a plurality of linear cuts, bent cuts, and the like. The division cutting line 23 is formed so that the cutting of the inner flap 13 progresses toward both sides from a linear cut located slightly on the base end side with respect to the center in the extending direction. The other inner flap 13 is divided into a pair of side piece portions 34 by the division cutting line 23.

(Second separation cutting line)
The second separation cutting line 24 is formed between the other inner flap 13 and the side wall 10. To be precise, the second separation cutting line 24 is formed on the second folding line L2 excluding both outer sides in the flow direction of the inner flap 13. The second separation cutting line 24 is a zipper formed by arranging a plurality of linear cut lines or bent cut lines. The second separation cutting line 24 is formed so that the cutting of the pair of side piece portions 34 progresses toward both sides from a linear cut located near the division cutting line 23.

The side wall 10 and the pair of inner flaps 13 are provided with cut tapes 27 (box dividing line portions) extending in the flow direction (direction intersecting the circumferential direction of the circumferential wall 1W) so as to pass through the engaging pieces 31. .. The cut tape 27 is a resin tape attached to the sidewall 10 and the back liner 9C of the inner flap 13 substantially at the center in the step direction. Further, on the side wall 10 and the other inner flap 13, four linear start cuts 27A are formed so as to sandwich the cut tape 27 and the second separation cutting line 24.

(Pair of opening line)
The two unsealing start line pairs 25 are curved at the central portions in the step direction of the two lower outer flaps 14 so as to approach each other from the distal end toward the proximal end. An opening start folding curve 25L is formed between the base end portions of each opening start line pair 25. By bending the portion sandwiched by each pair of opening start lines 25 inward along the opening start folding curve 25L, an opening start hole 25A for the user to grip the lower outer flap 14 is opened.

(Hole formation cutting line)
The two hole forming cutting lines 26 are formed at the tip portions of the two lower outer flaps 14. The two hole formation cutting lines 26 are arranged on the side of the pair of engagement cutting lines 21 with respect to the opening start line pair 25 (see FIG. 2 ). Each hole forming cutting line 26 extends from the tip of the lower outer flap 14 toward the base end, then bends in a direction away from the opening start line pair 25 and extends while inclining toward the tip side of the lower outer flap 14. .. That is, each hole forming cutting line 26 has a substantially L shape. A hole forming fold line 26L is formed between the end of each hole forming cutting line 26 and the tip of the lower outer flap 14.

The first folding curve L1, the second folding curve L2, the hand folding curve 17L, the engaging folding curve 31L, the opening start folding curve 25L, and the hole forming folding curve 26L are straight lines in the thickness direction from the back liner 9C side to the corrugated board sheet. It is a general ruled line that is crushed into a shape. The general-purpose ruled line has a function of bending the corrugated cardboard sheet so that the back liner 9C faces inward. The folding lines L1, L2, 17L, 31L, 25L and 26L described above are not limited to general ruled lines, but may be lines for bending a corrugated cardboard sheet such as lead ruled lines having a plurality of cuts formed at predetermined intervals on the general ruled line. Anything will do.

[Assembling the packaging box]
Next, an assembly process (sealing process) of the packaging box 1 will be described with reference to FIGS. 1 and 2. The packaging box 1 may be manually assembled by an operator, or may be fully or semi-automatically assembled by a packaging device (wrap around caser). Here, as an example, a case in which a packaging device (not shown) assembles the packaging box 1 fully automatically will be described.

The packaging device assembles the packaging box 1 by appropriately bending the set blank 5. Specifically, the packaging device places the accumulated contents (not shown) on the bottom wall 11 (on the side of the back liner 9C), and makes the pair of side walls 10 substantially perpendicular to each other along the first folding curve L1. Bend (start up). Then, the packaging device bends the passage piece 16 at a substantially right angle along the first folding curve L1 and applies an adhesive to the front surface (outer surface) of the passage piece 16 (or the back surface (inner surface) of the ceiling wall 12) at an appropriate position. Apply. Next, the packaging device bends the ceiling wall 12 at a substantially right angle along the first folding curve L1 and bonds the end portion of the ceiling wall 12 to the passage piece 16. As described above, the pair of side walls 10, the bottom wall 11, and the top wall 12 form a substantially rectangular tubular peripheral wall 1W, and the contents are wrapped in the peripheral wall 1W. As the adhesive, for example, a hot melt adhesive, a synthetic resin emulsion adhesive or the like can be used.

The packaging device folds the four inner flaps 13 at a substantially right angle along the second folding curve L2. In this state, the tip portions of the pair of inner flaps 13 facing each other in the left-right direction are separated from each other, and the pair of left and right inner flaps 13 close a part of the end surface of the peripheral wall 1W. Subsequently, the packaging device applies an adhesive to the outer surfaces of the pair of side portions 32 of the inner flap 13 (or the inner surfaces of the upper and lower outer flaps 14 and 15 excluding the tip side). Next, the packaging device bends the lower outer flap 14 and the upper outer flap 15 at a substantially right angle along the second folding curve L2 and adheres these to the pair of side portions 32 and the pair of side piece portions 34 of the inner flap 13. To do. In this state, the pair of outer flaps 14 and 15 facing each other in the vertical direction are joined to the inner flap 13 (side portion 32) at a position avoiding the engagement piece 31. Further, the pair of upper and lower outer flaps 14 and 15 are fixed to the outer surfaces of the pair of inner flaps 13 with their front ends abutting each other.

As described above, the packaging box 1 having a substantially rectangular parallelepiped shape is assembled, and the packaging box 1 is sealed (see FIG. 1 ). In this state, as shown in FIG. 1, the unsealing start line pair 25 of the pair of upper and lower outer flaps 14 and 15 is arranged at a position opposed to each other, and the hole forming cutting lines 26 of the pair of upper and lower outer flaps 14 and 15 are also arranged to each other. It is arranged at the opposite position. The pair of upper and lower opening start lines 25 and the pair of upper and lower hole forming cutting lines 26 are vertically symmetrical with respect to the abutting portion B of the upper and lower outer flaps 14, 15. The pair of upper and lower unsealing start lines 25 form a substantially rectangular area with curved corners as a whole. In addition, the pair of upper and lower hole forming cutting lines 26 form a generally trapezoidal region that gradually widens from the base end to the tip of the inner flap 13 as a whole. That is, the pair of upper and lower hole forming cutting lines 26 has a shape that is bilaterally symmetrical to the engaging protrusion 31</b>B of the engaging piece 31.

In addition, the user can carry the sealed packaging box 1 by putting a hand (finger) into the handholding hole 17A opened by pushing in the portion surrounded by the handhold cutting line 17 (see FIG. 4).

[Opening the packaging box]
Next, a procedure (opening step) of opening the sealed packaging box 1 will be described with reference to FIGS. 4 to 6. FIG. 4 is a perspective view showing the front part of the packaging box 1. FIG. 5 is a perspective view showing a state where the front end surface of the packaging box 1 is opened. FIG. 6 is a perspective view showing the packaging box 1 which is opened using the cut tape 27. In addition, here, a case where the front end face of the packaging box 1 (peripheral wall 1W) is opened will be described.

First, as shown in FIG. 4, the user puts his/her hand (finger) on the opening start hole 25A that is opened by pressing the portion sandwiched by each pair of opening start lines 25, and attaches the upper and lower outer flaps 14 and 15 to each other. Pull it toward you. Since the pair of upper and lower outer flaps 14 and 15 are bonded to the pair of inner flaps 13, the pair of left and right inner flaps 13 are pulled together with the pair of upper and lower outer flaps 14 and 15.

Interlocking with the operation of pulling the pair of upper and lower outer flaps 14 and 15, the inner flap 13 on one side (on the left side) is extended from the linear cut located near the center of each engagement cut line 21 (axis portion 21A) to both sides. It is cut towards (see FIGS. 2 and 3). As a result, the one inner flap 13 is divided into the engaging piece 31 and the pair of side portions 32 (see FIG. 5 ). The other (right) inner flap 13 is cut toward both sides from a linear cut located in the middle of the division cutting line 23 (see FIGS. 2 and 3). As a result, the other inner flap 13 is divided into the pair of side piece portions 34 (see FIG. 5).

When the operation of pulling the pair of upper and lower outer flaps 14 and 15 further progresses, as shown in FIG. 4, the pair of side portions 32 is cut along the pair of first separation cutting lines 22 (and the second folding curve L2). Then, the pair of side piece portions 34 are cut along the pair of second separation cutting lines 24 (and the second folding curve L2). The side portions 32 and the side piece portions 34 are separated from the side wall 10 while being adhered to the back surfaces (inner surfaces) of the pair of upper and lower outer flaps 14 and 15.

As described above, the pair of side portions 32 are opened along with the pair of upper and lower outer flaps 14 and 15 while being cut along the engagement cutting line 21 and the first separation cutting line 22, respectively. Similarly, the pair of side pieces 34 are opened along with the pair of upper and lower outer flaps 14 and 15 while being cut along the division cutting line 23 and the second separation cutting line 24, respectively. Further, the user opens the engaging piece 31 left on the front end surface of the packaging box 1 to the outside along the second folding curve L2, so that substantially the entire front end surface of the packaging box 1 is opened. Thereby, the packaging box 1 is opened and the user can take out the contents.

As another opening method of the packaging box 1, as shown in FIG. 7, the packaging box 1 may be opened using a cut tape 27. Specifically, the user grasps a piece (see FIGS. 2 and 3) surrounded by the start cut 27A and the second separation cutting line 24 and pulls the piece substantially horizontally, thereby cutting the side wall 10 and the inner flap 13 with a tape. Cut along 27. As described above, since the cut tape 27 is provided so as to pass through the engaging piece 31, the cut tape 27 is prevented from intersecting the first separation cutting line 22 and being cut at the first separation cutting line 22. Has been done. Thereby, the packaging box 1 can be appropriately cut along the cut tape 27, and the packaging box 1 can be vertically divided into two. The user can take out the contents placed on the lower portion (bottom wall 11) of the packaging box 1 by removing the upper portion of the packaging box 1.

[Resealing of packaging box]
Next, with reference to FIG. 7, a procedure (resealing step) of resealing the opened packaging box 1 (reclosing the front end surface of the packaging box 1) will be described. FIG. 7 is a perspective view showing a state where the front end surface of the packaging box 1 is resealed.

First, the user bends the pair of upper and lower outer flaps 14 and 15 so as to close the front end surface of the packaging box 1 while keeping the engagement piece 31 open to the outside (see FIG. 5). Next, as shown in FIG. 7, the user folds the engagement piece 31 on the abutting portions B of the pair of upper and lower outer flaps 14 and 15. The engagement protrusion 31B of the engagement piece 31 substantially coincides with the portion surrounded by the pair of upper and lower hole formation cutting lines 26 and the hole formation fold line 26L. That is, the tip of the engaging protrusion 31B substantially coincides with the vertically extending lines of the pair of upper and lower hole forming cutting lines 26, and the engaging folding curve 31L substantially coincides with the hole forming folding curve 26L.

Then, the user pushes in the engaging protrusion 31B that overlaps the portion surrounded by the pair of upper and lower hole forming cutting lines 26. The engaging protrusion 31B is bent along the engaging folding line 31L while pushing in the portion surrounded by the pair of upper and lower hole forming cutting lines 26. The portion surrounded by the pair of upper and lower hole forming cutting lines 26 is pushed by the bending engaging protrusion 31B and is bent along the pair of upper and lower hole forming folding curves 26L (see FIG. 3 and the like). The engaging hole portion 26A is opened by bending the portion surrounded by the pair of upper and lower hole forming cutting lines 26.

The engaging protrusion 31B is inserted into the engaging hole portion 26A while pressing the portion surrounded by the pair of upper and lower hole forming cutting lines 26 to form the engaging hole portion 26A. At this time, the upper and lower ends of the engagement protrusion 31B interfere with the edges of the engagement hole 26A, so that the engagement protrusion 31B sinks into the engagement hole 26A while bending the upper and lower sides thereof. With the engagement protrusion 31B being immersed in the engagement hole 26A, the upper and lower sides of the engagement protrusion 31B are substantially restored by their own restoring force, and the base end of the engagement protrusion 31B is engaged. It is caught (engaged) on the edge of the hole 26A. In this state, the engagement protrusion 31B does not easily separate from the engagement hole 26A, and the engagement piece 31 engages with the engagement hole 26A from the outside of the pair of upper and lower outer flaps 14 and 15. Held in.

As described above, the pair of upper and lower outer flaps 14 and 15 are pressed by the engaging pieces 31 engaged with the engaging hole portions 26A and are held in the closed state. That is, the packaging box 1 is in a resealed state. When the packaging box 1 is opened again, the engagement protrusion 31B may be pulled out from the engagement hole 26A, and the pair of upper and lower outer flaps 14 and 15 may be opened.

In the packaging box 1 according to the first embodiment described above, the pair of engagement cut lines 21 extend from the base end to the tip of the inner flap 13 and are open at the tip of the inner flap 13. According to this configuration, the engaging piece 31 and the portion other than the engaging piece 31 can be easily separated, as compared with the case where the closed range is hollowed out. Thereby, the work from cutting the engagement piece 31 from the inner flap 13 to engaging with the engagement hole portion 26A can be performed quickly. That is, resealing can be easily performed.

Further, in the packaging box 1 according to the first embodiment, the side portion 32 of the inner flap 13 is cut along the engagement cutting line 21 and the first separation cutting line 22 and adheres to the pair of upper and lower outer flaps 14 and 15. In the opened state, the upper and lower outer flaps 14 and 15 are integrally opened (see FIG. 5). With this configuration, the pair of side portions 32 can be separated from the engagement piece 31 in conjunction with the operation of opening the pair of upper and lower outer flaps 14 and 15. Thereby, the work of forming the engagement piece 31 can be performed easily and quickly. Further, since the side portion 32 of the inner flap 13 is cut off from the side wall 10 when the packaging box 1 is opened, the entire end surface of the peripheral wall 1W can be opened (see FIG. 5). Accordingly, the inner flap 13 (side portion 32) does not get in the way when the contents are taken out, and the contents can be taken out smoothly. Furthermore, since the side portion 32 cut off from the side wall 10 remains adhered to the pair of upper and lower outer flaps 14 and 15, it is possible to prevent the side portion 32 from separating and becoming a scrap (dust).

Further, in the packaging box 1 according to the first embodiment, the pair of upper and lower outer flaps 14 and 15 are cut along the pair of upper and lower hole-forming cutting lines 26 that are formed facing each other on the tip side thereof, The engaging hole portion 26A is open. That is, the engagement hole portion 26A is opened so as to straddle the abutting portion B of the upper and lower outer flaps 14 and 15 (see FIG. 7). According to this structure, by stacking one engagement piece 31 along the abutting portion B and inserting it in the engagement hole portion 26A, the pair of upper and lower outer flaps 14 and 15 can be pressed. As a result, the re-sealing can be performed by forming one engagement piece 31, so that the labor for re-sealing can be reduced.

Further, according to the packaging box 1 according to the first embodiment, since the tip end portion of the engagement protrusion 31B is narrower than the base end portion thereof, the engagement protrusion 31B can be smoothly inserted into the engagement hole portion 26A. You can Moreover, since the base end portion of the engagement protrusion 31B is wider than the tip end portion thereof, it is possible to maintain the state in which the engagement protrusion 31B is engaged with the edge portion of the engagement hole portion 26A.

[First Modification of First Embodiment]
In the packaging box 1 according to the first embodiment described above, the engagement pieces 31 (a pair of engagement cut lines 21) are formed on the two inner flaps 13 that are diagonally located among the four inner flaps 13. However, the present invention is not limited to this. For example, as shown in FIG. 8, the engagement pieces 31 (a pair of engagement cut lines 21) may be formed on all of the four inner flaps 13 (first modification). In this case, the engagement hole portions 26</b>A (two hole formation cutting lines 26 and the like) are also provided at four places in accordance with the four engagement pieces 31. In the packaging box 1 according to the first modification, the cut tape 27 and the start cut 27A are omitted.

[Second Modification of First Embodiment]
In addition, the engagement pieces 31 (the pair of engagement cut lines 21) may be formed on the pair of left and right inner flaps 13 on the front side or the pair of left and right inner flaps 13 on the rear side of the packaging box 1 (peripheral wall 1W). Good (second modified example (not shown)). In this case, the pair of engagement cut lines 21 (engagement pieces 31) may be formed on at least one of the pair of left and right inner flaps 13, and the engagement hole portion 26A may be adjusted to match the number of engagement pieces 31. (Not shown).

[Third Modification of First Embodiment]
Further, in the packaging box 1 according to the first embodiment (including the first and second modified examples), the engagement hole portion 26A has a pair of upper and lower outer flaps 14 along the pair of upper and lower hole forming cutting lines 26. Although it was opened by cutting 15, the present invention is not limited to this. For example, as shown in FIG. 9, the engagement hole portion 26A may be configured by a pair of upper and lower cutout portions 28 that are formed so as to be recessed on the tip side of the pair of upper and lower outer flaps 14 and 15. In this case, the engagement piece 31 overlaps the abutting portion B of the pair of upper and lower outer flaps 14 and 15 and engages with the pair of upper and lower cutout portions 28 (see the chain double-dashed line in FIG. 9 ). Even with this configuration, the labor for resealing can be reduced, and resealing can be easily performed. The pair of upper and lower cutouts 28 (on the right side in FIG. 9) with which the engagement pieces 31 are not engaged are more distal than the pair of upper and lower cutouts 28 (on the left side in FIG. 9) with which the engagement pieces 31 are engaged. The depth of the notch is shallow (small).

[Fourth Modification of First Embodiment]
Further, in the packaging box 1 according to the first embodiment (including the first to third modified examples), the engagement hole portion 26A is opened so as to straddle the butting portions B of the pair of upper and lower outer flaps 14 and 15. However, the present invention is not limited to this. The engagement hole portion 26A may be formed in at least one of the pair of upper and lower outer flaps 14 and 15. For example, as shown in FIG. 10, the engagement hole 26</b>A may be opened in the upper outer flap 15. In this case, the position of the engagement piece 31 is also changed so as to engage with the engagement hole portion 26A.

In the packaging box according to the first embodiment (including the first to fourth modified examples; the same applies hereinafter), the division cutting line 23 is formed on the other inner flap 13, but the division cutting line 23 is omitted. May be done. Although the first separation cutting line 22 or the second separation cutting line 24 is formed at the boundary between the side wall 10 and the inner flap 13, at least one of the first separation cutting line 22 and the second separation cutting line 24 is formed. Either one may be omitted.

Further, in the packaging box 1 according to the first embodiment, the recess 30 is formed at the tip of the inner flap 13, but depending on the position, size, etc. of the opening start line pair 25, the hole forming cutting line 26, etc., The recess 30 may be omitted (not shown). Further, at least one of the pair of opening start line pairs 25 formed on the upper and lower outer flaps 14, 15 may be omitted.

Further, in the packaging box 1 according to the first embodiment, the cut tape 27 is used as an example of the box dividing line portion, but the present invention is not limited to this. As another example of the box dividing line portion, a liner cut in which only the back liner 9C of the side wall 10 and the pair of inner flaps 13 (or the back liner 9C and a part of the middle shin 9A) is cut may be used ( (Not shown).

[Second Embodiment]
Next, the packaging box 2 according to the second embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a plan view showing the blank 6 of the packaging box 2. FIG. 12 is a perspective view showing a state where the front end surface of the packaging box 2 is resealed. In the following description, configurations that are the same as or correspond to those of the packaging box 1 according to the first embodiment are given the same reference numerals, and descriptions that are the same as or corresponding to those of the packaging box 1 are omitted.

The packaging box 2 is an A-type box that is sealed by closing the upper end surface and the lower end surface of the peripheral wall 2W having a substantially rectangular tube shape (see FIG. 12). The packaging box 2 is formed by assembling the blank 6 (made of double-faced corrugated sheet) shown in FIG.

[blank]
As shown in FIG. 11, the blank 6 includes a pair of end walls 40 (first walls), a pair of side walls 41 (second walls), a pair of upper inner flaps 42 (inner flaps), and a pair of upper and outer walls. It includes a flap 43 (outer flap), a pair of lower inner flaps 44, and a pair of lower outer flaps 45.

<End wall, Side wall>
The pair of end walls 40 and the pair of side walls 41 are alternately arranged in the flow direction and are continuously provided via a vertical folding curve L10 (general-purpose ruled line). A passage piece 46 is connected to the end wall 40 at the end in the flow direction via a vertical folding curve L10. The side wall 41 is formed in a substantially rectangular shape that is longer than the end wall 40 in the flow direction.

<Upper inner flap, upper outer flap>
The pair of upper inner flaps 42 are connected to one end portion (upper end portion) in the step direction of the pair of end walls 40 via a horizontal folding curve L20 (general ruled line). The pair of upper outer flaps 43 are connected to one end portion (upper end portion) of the pair of side walls 41 in the step direction via the horizontal folding curve L20. The dimension (extension dimension) of the upper inner flap 42 and the upper outer flap 43 in the step direction is set to approximately half the dimension of the end wall 40 in the flow direction.

<Lower inner flap, Lower outer flap>
The pair of lower inner flaps 44 are connected to the other end portion (lower end portion) in the step direction of the pair of end walls 40 via the horizontal folding curve L20. The pair of lower outer flaps 45 are connected to the other end portion (lower end portion) in the step direction of the pair of side walls 41 via the horizontal folding curve L20. The lower inner flap 44 is formed in substantially the same shape as the upper inner flap 42, and the lower outer flap 45 is formed in substantially the same shape as the upper outer flap 43.

<Cutting structure>
The upper inner flap 42 and the pair of upper outer flaps 43 each have a cutting structure 20 substantially similar to that of the first embodiment.

The cutting structure 20 includes a pair of engagement cutting lines 21, a pair of first separation cutting lines 22, a pair of opening start line 25, and a pair of hole forming cutting lines 26. In addition, in the second embodiment, the division cutting line 23 and the second separation cutting line 24 are omitted.

(Engagement cutting line, first separation cutting line)
The pair of engagement cut lines 21 extend from the boundary with the end wall 40 (horizontal folding curve L20) to the tip of the upper inner flap 42 in the region in the center of the upper inner flap 42 in the flow direction. The upper inner flap 42 is divided into an engagement piece 31 and a pair of side portions 32 by the pair of engagement cut lines 21. The pair of first separation cutting lines 22 are zippers formed between the pair of side portions 32 and the end wall 40.

(Opening start line pair, hole formation cutting line)
The pair of opening start line pairs 25 are curved in the direction of the flow direction of the pair of upper outer flaps 43 so as to approach each other from the distal end toward the proximal end. An opening start folding curve 25L is formed between the base end portions of each opening start line pair 25. The pair of hole forming cutting lines 26 are formed at the tip portions of the pair of upper outer flaps 43. Each hole forming cutting line 26 is formed in a substantially L shape, and a hole forming fold curve 26L is formed between the end portion of each hole forming cutting line 26 and the tip of the upper outer flap 43.

[Sealing of packaging box]
Next, a procedure for assembling the packaging box 2 will be briefly described with reference to FIG. The passage piece 46 is bonded to the inner surface of the side wall 41, and the packaging box 1 is in a folded state.

First, the worker bends the pair of end walls 40 and the pair of side walls 41 at a substantially right angle along the longitudinal folding curve L10 to form a substantially rectangular tubular peripheral wall 2W. Next, the operator bends the pair of lower inner flaps 44 inward along the horizontal folding curve L20, and then bends the pair of lower outer flaps 45 inward along the horizontal folding curve L20 to form the lower inner flap 44. To glue. By the above, the bottom surface of the packaging box 2 is formed.

Next, the operator puts a plurality of contents (not shown) into the inside (on the bottom surface) from the top opening of the peripheral wall 2W. Subsequently, the operator bends the pair of upper inner flaps 42 inward along the horizontal folding curve L20, and then bends the pair of upper outer flaps 43 inward along the horizontal folding curve L20 to form the upper inner flap 42. To glue. By the above, the top surface of the packaging box 2 is formed and is in a sealed state.

[Opening the packaging box]
Next, a procedure for opening the sealed packaging box 2 will be briefly described.

First, the user puts a hand (finger) on the opening start hole 25A that is opened by pressing the portion sandwiched by the pair of opening start lines 25, and pulls the pair of upper outer flaps 43 upward. Interlocking with the operation of pulling the pair of upper outer flaps 43, one upper inner flap 42 is cut toward both sides from a linear cut located near the center of each engagement cut line 21 (axis line portion 21A). It As a result, the one upper inner flap 42 is divided into the engagement piece 31 and the pair of side portions 32. The pair of upper outer flaps 43 is peeled off from the other upper inner flap 42.

When the operation of pulling the pair of upper and lower outer flaps 14 and 15 further progresses, the pair of side portions 32 is cut along the pair of first separation cutting lines 22 and the like. Each side portion 32 is separated from the end wall 40 while being bonded to the back surfaces (inner surfaces) of the pair of upper outer flaps 43. As described above, like the packaging box 1 according to the first embodiment, almost all of the upper end surface of the packaging box 2 can be opened.

[Resealing of packaging box]
Next, a procedure for resealing the opened packaging box 2 will be briefly described with reference to FIG.

First, the user bends the other upper inner flap 42 inward and the pair of upper outer flaps 43 inward. Next, the user folds the engaging piece 31 on the abutting portion B of the pair of upper outer flaps 43, and pushes the engaging protrusion 31B into the portion surrounded by the pair of hole forming cutting lines 26. The engagement protrusion 31B is inserted (engaged) into the engagement hole portion 26A while pressing the portion surrounded by the pair of hole formation cutting lines 26 to form the engagement hole portion 26A.

As described above, the pair of upper outer flaps 43 are pressed by the engaging pieces 31 engaged with the engaging hole portions 26A and are held in the closed state. That is, the packaging box 2 is in a resealed state.

According to the packaging box 2 according to the second embodiment described above, the same operation as that of the packaging box 1 according to the first embodiment, such as the time and effort required for resealing can be reduced and the resealing can be easily performed, The effect can be obtained.

In the packaging box 2 according to the second embodiment, the engagement pieces 31 (a pair of engagement cut lines 21) are formed on one upper inner flap 42, but the present invention is not limited to this. Similar to the first modification of the first embodiment, the engagement pieces 31 (the pair of engagement cut lines 21) may be formed on all of the pair of upper inner flaps 42 and the pair of lower inner flaps 44 ( First modification (not shown)). Further, similarly to the second modification of the first embodiment, the engagement pieces 31 (the pair of engagement cut lines 21) may be formed on the pair of upper inner flaps 42 or the pair of lower inner flaps 44 ( Second modification (not shown)). As described above, the pair of engagement cut lines 21 may be formed on at least one of the pair of upper inner flaps 42 (the pair of lower inner flaps 44), and the engagement hole portion 26A may be the engagement piece 31. (Not shown).

Further, similarly to the third modification of the first embodiment, the engagement hole portion 26A may be a pair of cutout portions 28 formed on the tip side of the pair of upper inner flaps 42 (third modification). Example (not shown)). Further, similarly to the fourth modification of the first embodiment, the engagement hole portion 26A may be opened to either one of the pair of upper outer flaps 43 (fourth modification (not shown)). ..

In addition, in the packaging box 2 according to the second embodiment (including the first to fourth modified examples. The same applies hereinafter), the division cutting line 23 and the second separation cutting line 24 are omitted, but these are the other. It may be formed on the upper inner flap 42 (not shown). Further, at least one of the first separation cutting line 22 and the pair of opening start line pairs 25 formed on the pair of upper outer flaps 43 may be omitted.

In addition, in the packaging boxes 1 and 2 according to the first and second embodiments, the respective engagement cutting lines 21 are formed so that the cutting progresses from the middle in the longitudinal direction toward both sides. Not limited to. For example, each engagement cutting line 21 may be formed such that the cutting progresses from the distal end to the proximal end of the inner flap 13 (upper inner flap 42).

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the adhesive is used for fixing the outer flaps 14, 15, 43, 45, but instead of the adhesive, an adhesive tape or the like ( (Not shown) may be used. In this case, when the packaging box 1 is opened, the outer flaps 14, 15, 43, 45 are separated from the inner flaps 13, 42, 44, and the engagement pieces 31 are manually attached to the pair of sides. It will be divided from the part 32. In this case, it is preferable that each engagement cutting line 21 cuts from the tip of the inner flap 13 or the like toward the base. Thereby, the engagement piece 31 can be easily cut from the inner flap 13 and the like.

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the front end portions of the pair of left and right inner flaps 13, the pair of upper inner flaps 42, and the like are separated from each other, but the invention is not limited to this. The front ends of the inner flaps 13 and the like may be abutted against each other, and the pair of left and right inner flaps 13 and the like may close the entire end surface of the peripheral wall 1W (not shown).

Further, in the packaging boxes 1 and 2 according to the first and second embodiments, the top and bottom outer flaps 14 and 15 and the pair of upper outer flaps 43 and the like have their ends abutted against each other. The tips of the pair of outer flaps 14, 15 and the like may be separated (not shown). Further, the abutting portion B of the pair of upper and lower outer flaps 14, 15 and the like does not indicate only a state in which the pair of upper and lower outer flaps 14, 15 and the like are butted with each other without a gap, but a pair of upper and lower outer flaps 14, 15 and the like. It also includes a state in which the tip ends of the two and the like face each other with a slight gap therebetween.

Further, the packaging box 1 according to the first embodiment is a wrap-around type box, and the packaging box 2 according to the second embodiment is an A-type box, but may be a box including an inner flap and an outer flap. The form of the box does not matter.

Further, the packaging boxes 1 and 2 according to the first and second embodiments are formed of paper double-faced corrugated sheets, but the present invention is not limited to this. For example, the corrugated board sheet may be a single-sided corrugated board sheet having a liner attached to one side of the middle shin 9A, or a double-sided corrugated board sheet obtained by laminating a single-sided corrugated board sheet to a double-sided corrugated board sheet. Further, for example, the packaging boxes 1 and 2 may be formed of cardboard, a resin plate, or the like instead of the paper corrugated cardboard sheet.

In addition, the description of the above embodiment shows one mode 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 boxes 1W, 2W peripheral wall 10 side wall (first wall)
11 Bottom wall (2nd wall)
12 Top wall (2nd wall)
13 Inner flap 14 Lower outer flap 15 Upper outer flap 21 Engagement cutting line 22 First separation cutting line (separation cutting line)
26 hole forming cutting line 26A engaging hole portion 27 cut tape (box dividing line portion)
28 Notch part 31 Engagement piece 31A Engagement shaft part 31B Engagement projection part 32 Side part 40 End wall (first wall)
41 Side wall (second wall)
42 Upper inner flap (inner flap)
43 Upper outer flap (outer flap)
B Butt

Claims (6)

A peripheral wall (1W, 2W) formed in a tubular shape having a pair of first walls (10, 40) and a pair of second walls (11, 12, 41);
A pair of inner flaps (13, 42) that are connected to the ends of the pair of first walls and that close at least a part of the end faces of the peripheral wall;
A pair of outer flaps (14, 15, 43) that are connected to the ends of the pair of second walls and are fixed to the outer surface of the inner flap;
A pair of engagement cuts that extend from the boundary with the first wall to the tip of the inner flap in at least one of the pair of inner flaps, and cut the inner flaps into strips to form engagement pieces (31). Line (21),
An engaging hole portion (26A) which is formed in at least one of the pair of outer flaps, and in which the engaging piece engages from the outside of the outer flap,
The packaging box, wherein the pair of outer flaps are joined to the inner flap at positions avoiding the engagement pieces. The inner flap is divided into the engagement piece and a pair of side portions (32) located on both sides of the engagement piece by the pair of engagement cut lines,
The pair of outer flaps are bonded to the pair of side portions,
A pair of separation cutting lines (22) are formed between the pair of side portions and the first wall,
The said pair of side parts are each opened with the said outer flap, being cut|disconnected along the said engagement cutting line and the said separation cutting line, when opening a packaging box. Packaging box. The pair of inner flaps are respectively connected to both end portions of the pair of first walls,
The pair of outer flaps are respectively connected to both end portions of the pair of second walls,
A box dividing line portion (27) is provided in the first wall and the pair of inner flaps so as to extend in a direction intersecting the circumferential direction of the peripheral wall so as to pass through the engagement piece. Item 2. The packaging box according to Item 2. The pair of outer flaps are fixed to the pair of inner flaps in a state where the tip ends are abutted,
The engagement hole portion is opened by cutting the pair of outer flaps along a pair of hole-forming cutting lines (26) formed so as to face the tip ends of the pair of outer flaps,
The packaging box according to any one of claims 1 to 3, wherein the engagement piece overlaps with the abutting portion (B) of the pair of outer flaps and engages with the engagement hole portion. The pair of outer flaps are fixed to the pair of inner flaps in a state where the tip ends are abutted,
The engagement hole portion is configured by a pair of cutout portions (28) formed so as to be recessed on the tip side of the pair of outer flaps,
The packaging box according to any one of claims 1 to 3, wherein the engagement piece overlaps with the butting portions (B) of the pair of outer flaps and engages with the pair of notches. The engagement piece,
An engagement shaft portion (31A) extending from the boundary with the first wall toward the tip,
An engaging projection (31B) continuously provided at the tip of the engaging shaft and inserted into the engaging hole,
The engagement protrusion has a shape in which the width gradually narrows from the base end portion wider than the tip end portion of the engagement shaft portion toward the tip end,
The packaging box according to claim 1, wherein a base end portion of the engagement protrusion engages with an edge portion of the engagement hole portion.

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