JP2019099239A - Packaging box - Google Patents

Abstract

To provide a packaging box that can be easily opened.SOLUTION: A packaging box 1 comprises: first and second side walls 11 and 13 disposed corresponding to an edge part of a bottom wall 12; each of flaps 14 to 17 provided continuously with the right and left ends of the first and second side walls 11 and 13 and disposed corresponding to the edge part of the bottom wall 12; and a top wall 10 provided continuously to an end part of the first side wall 11 and opposed to the bottom wall 12. On the first and second side walls 11 and 13, a first cutting line 23 is formed to extend in the right and left direction. On each of the first and second inner flaps 14 and 15, a second cutting line 24 is formed to extend in the front and rear direction continuously to the first cutting line 23, and a third cutting line 25 is formed to extend toward the top wall 10 continuously to the second cutting line 24. The second cutting line 24 is formed to be inclined toward the top wall 10 from the upstream side to the downstream side in the cutting direction so that an angle formed with the third cutting line 25 is an obtuse angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging box.

  BACKGROUND OF THE INVENTION Packaging boxes are known that can be displayed at the store with the contents stored after being opened.

  For example, in the packaging box described in Patent Document 1, the first side panel, the bottom panel, the second side panel, and the upper panel are connected, and the first side panel and the upper panel are joined. There is. End joining flaps are provided on both sides of the first and second side panels, and on both sides of the bottom and upper panels, the first end flap and the second end flap fixed to the end joining flaps Are connected. The first and second side panels and the first and second end joining flaps are provided with a cutting extension line (horizontal cutting extension line) extending horizontally. Also, the second end panel is provided with a vertically extending cutting assistance line (vertical cutting assistance line). Furthermore, the upper panel is provided with a cutting assistance line so as to connect the left and right vertical cutting assistance lines.

JP, 2008-179371, A

  The packaging box described above is formed by cutting the first and second side panels with a horizontal cutting auxiliary line, then cutting the second side panel with a vertical cutting auxiliary line, and bending the upper panel with a cutting auxiliary line. Will be opened. However, in the packaging box described above, since the horizontal cutting auxiliary line and the vertical cutting auxiliary line are orthogonal to each other, the cutting force along the horizontal cutting auxiliary line is less likely to be transmitted to the vertical cutting auxiliary line, which makes opening difficult. there were.

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

  In order to achieve the above object, the packaging box of the present invention comprises a bottom portion, a side surface portion disposed corresponding to the edge portion extending in the longitudinal direction of the bottom portion, and both end portions in the longitudinal direction of the side surface portion. And a pair of end face portions disposed corresponding to the edge portions extending in the width direction intersecting the length direction of the bottom portion, at least one of the side face portion and the pair of end face portions A top portion is provided continuously with the end portion and opposed to the bottom portion, and a first cutting line is formed in the side surface portion so as to extend in the length direction, and each of the end surface portions is Two cutting lines are formed extending in the width direction continuously to the first cutting line, and a third cutting line is formed extending continuously to the second cutting line toward the upper portion And the second cutting line may be all or at least a portion of the third cutting line downstream of the end face in the cutting direction. Is formed in a state where the angle between the third cutting line is the cutting direction upstream so that the obtuse angle toward the downstream inclined side of the top portion.

  In this case, it is preferable that the first cutting line is formed to be inclined toward the top from the vicinity of the center in the length direction toward the boundary between the pair of end surfaces.

  In this case, the second cutting line is a continuous line formed on an extension of the first cutting line, and a sloped line formed between the continuous line and the third cutting line. And the inclined line portion is inclined toward the top from the upstream side to the downstream side in the cutting direction at an angle larger than that of the continuous line portion, and the intersection of the continuous line portion and the first cutting line is It is preferable to be located in the said bottom part side rather than the intersection of the said inclination line part and the said 3rd cutting line.

  In this case, the inclined line portion is curved so as to be convex toward the top portion side or the bottom portion side, and from the intersection point with the continuous line portion to the intersection point with the third cutting line It is preferable that an angle between a straight line and the third cutting line be obtuse.

  In this case, the side surface portion is formed with the unsealing start portion for gripping the side surface portion, and the first cutting line is formed across the boundary between the unsealing start portion and the pair of end surface portions. Is preferred.

  In this case, it is preferable that a pair of auxiliary folding curves for mountain-folding the side surface portion on the side of the top portion with respect to the first cutting line is formed in the side surface portion.

  In this case, the side surface portion includes a first side wall and a second side wall opposed in the width direction, and the bottom portion and the top portion, and the first side wall and the second side wall are alternately provided continuously. A pair of first inner flaps, which are provided with a circumferential wall having openings at both longitudinal end faces, and the pair of end face portions are continuously provided at both longitudinal end portions of the first side wall, and the second side wall A pair of second inner flaps continuously provided at both ends in the lengthwise direction, a pair of first outer flaps continuously provided at both ends in the lengthwise direction of the ceiling, and both ends in the lengthwise direction of the bottom A pair of second outer flaps provided in series with the first part, the first outer flap and the second outer flap being overlapped with the first inner flap and the second inner flap; The opening is closed, and the first side wall and the second side wall respectively A cutting line is formed, the second cutting line is formed on each of the first inner flap and the second inner flap, and the third cutting line is formed on the first outer flap; It is preferable that an opening fold curve for valley-folding the top portion is formed on the top portion along a line connecting two of the third cutting lines.

  In this case, the side surface portion includes a pair of side walls opposed in the width direction, and the pair of end surface portions includes a pair of end walls opposed in the length direction, and the pair of side walls and the pair of end walls Are alternately arranged to form a peripheral wall having openings at both end surfaces in the vertical direction, and the bottom portion is a pair of bottom inner flaps continuously connected to the lower end portions of the pair of end walls; And a pair of bottom outer flaps connected to the lower end portion of the side wall and closing the opening on the lower side of the peripheral wall in a state of being stacked on the pair of bottom inner flaps; The opening on the upper side of the peripheral wall in a state in which a pair of inner sky flaps connected to the upper ends of the pair of end walls and a upper edge of the pair of side walls are connected to one another A pair of extraterrestrial flaps that close the The first cutting line is formed, the second cutting line is formed in the pair of end walls, and the third cutting line is the second cutting in the pair of end walls. It is preferable to be formed in a state of extending from the middle part of the line toward the top part.

  In this case, the bottom portion, the side surface portion, the end surface portion, and the top portion are formed of a corrugated sheet in which a liner is bonded to a corrugated center, and the center extends along the vertical direction of the packaging box. The inner bottom flap, the bottom outer flap, the upper flap and the upper extra flap are continuously connected to the peripheral wall via a fold line extending in a flow direction orthogonal to a step direction parallel to the center, The pair of first cutting lines and the pair of second cutting lines are perforation lines in which a plurality of incisions are arranged, and are alternately and continuously formed parallel to the folding line over the entire circumference of the peripheral wall Is preferred.

  In this case, the pair of upper and lower flaps close the opening on the upper side of the peripheral wall in a state where their tip ends are butted, and the third cutting line corresponds to the pair from the second cutting line at the end wall The pair of in-sky flaps can be valley-folded at a position along the buttocks of the tips of the pair of outside-of-the-sky flaps. Preferably, it is formed.

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

It is a perspective view showing the packing box concerning a 1st embodiment of the present invention. It is a top view showing a blank of a packing box concerning a 1st embodiment of the present invention. It is a side view showing a packing box concerning a 1st embodiment of the present invention. It is a perspective view showing the state where opening of the packaging box concerning a 1st embodiment of the present invention was started. It is a perspective view which shows the state which opened the front upper part of the packaging box which concerns on 1st Embodiment of this invention. It is a side view showing the state where the whole upper part of the packaging box concerning a 1st embodiment of the present invention was opened. It is a perspective view which shows the state which opened the whole upper part of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which disassembled the upper part of the packaging box which concerns on 1st Embodiment of this invention. It is a side view showing the packing box concerning the modification of a 1st embodiment of the present invention. It is a perspective view showing the packing box concerning a 2nd embodiment of the present invention. It is a top view showing the blank of the packing box concerning a 2nd embodiment of the present invention. It is a side view showing a packing box concerning a 2nd embodiment of the present invention. It is a perspective view showing the state where opening of the packaging box concerning a 2nd embodiment of the present invention was started. It is a perspective view which shows the state which opened the front upper part of the packaging box which concerns on 2nd Embodiment of this invention. It is a side view which shows the state which opened the whole upper part of the packaging box which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the state which opened the whole upper part of the packaging box which concerns on 2nd Embodiment of this invention. It is a side view showing the packing box concerning the 1st modification of a 2nd embodiment of the present invention. It is a side view showing the packing box concerning the 2nd modification of a 2nd embodiment of the present invention. It is a side view showing the packing box concerning the 3rd modification of a 2nd embodiment of the present invention. It is a top view which shows a part of blank of the packaging box which concerns on the 4th modification of 2nd Embodiment of this invention. It is a top view which shows a part of blank of the packaging box which concerns on the 5th modification of 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Note that "Fr" shown in each figure indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "Up" is shown, "D" is showing "down." The front-rear direction (width direction) is orthogonal (crossed) to the left-right direction (length direction), and the up-down direction is orthogonal (crossed) to the front-rear direction and the left-right direction. Although terms used herein indicate directions or positions, these terms are used for the convenience of description and do not limit the technical scope of the present invention.

First Embodiment Outline of Packaging Box
With reference to FIG. 1 and FIG. 2, the packaging box 1 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a perspective view showing the packaging box 1. FIG. 2 is a plan view showing 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 that is long in the left-right direction. The packaging box 1 is a wrap-around type case which is sealed by folding so as to wrap contents (not shown) and bonding ends thereof. The contents are, for example, cans filled with food (drinks) or the like, bottles, containers made of resin, etc., but are not limited thereto.

  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 sheet of paper corrugated board with a die cutter or the like. The corrugated cardboard sheet is, for example, a double-faced corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 5) are laminated on the front and back of a corrugated centerline 9A. FIG. 2 shows the front surface liner 9B side (the outer surface side of the packaging box 1). In the present specification, a direction parallel to the center 9A of the corrugated cardboard sheet is referred to as "step direction", and a direction orthogonal to the step direction is referred to as "flow direction". “X” shown in the drawings indicates “stage direction”, and “Y” indicates “flow direction”.

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

<Top wall, first side wall, bottom wall, second side wall>
The top wall 10, the first side wall 11, the bottom wall 12 and the second side wall 13 are arranged in a row in this order from one step direction to the other in the step direction. The bottom wall 12 and the top wall 10, and the first side wall 11 and the second side wall 13 are alternately connected to each other via a first fold line L1 extending in the flow direction. A passage piece 18 is connected to one end of the ceiling wall 10 in the step direction via a passage curve L10. The first fold line L1 is a general-purpose ruled line formed by squeezing a corrugated cardboard sheet in the thickness direction from the back liner 9C side in a straight line. The passage folding line L10 is a leaded crease in which a plurality of incisions are formed on a general-purpose creased line. The incisions are formed by cutting a cardboard sheet in the thickness direction.

  The walls 10 to 13 and the passage piece 18 are formed in a substantially rectangular shape having substantially the same size in the flow direction. The top wall 10 as an example of the top portion is set to have substantially the same dimension in the step direction as the bottom wall 12 as an example of the bottom portion. The first side wall 11 and the second side wall 13 as an example of the side face portion are set to have substantially the same dimension in the step direction. The dimension in the step direction of the first and second side walls 11 and 13 is set to be slightly shorter than the dimension in the step direction of the top wall 10 or the like. The dimension in the step direction of the passage piece 18 is set shorter than the dimension in the step direction of the first side wall 11.

<First inner flap, second inner flap>
The pair of first inner flaps 14 is connected to both ends in the flow direction (left and right direction) of the first side wall 11 via a second fold line L2 extending in the step direction. The pair of second inner flaps 15 is continuously provided at both ends in the flow direction (left and right direction) of the second side wall 13 via the second bending line L2. The first and second inner flaps 14 and 15 are formed in a substantially rectangular shape elongated in the step direction. The dimension of each inner flap 14, 15 in the step direction is substantially the same as the dimension of each side wall 11, 13 in the step direction, and the dimension in the flow direction of each inner flap 14, 15 (extension dimension) is the step of the bottom wall 12 It is set to about half of the dimension of the direction. In each of the inner flaps 14, 15, handle recesses 14A, 15A are formed at positions corresponding to the handle holes 16A of the outer flaps 16 described later. The handle concave portions 14A and 15A are cut out in a substantially semicircular shape from the tip end of each of the inner flaps 14 and 15 toward the base end side. The second fold line L2 is a general ruled line.

<First outer flap, second outer flap>
The pair of first outer flaps 16 is continuously provided at both ends in the flow direction (left and right direction) of the ceiling wall 10. The pair of second outer flaps 17 is continuously provided at both ends in the flow direction (left and right direction) of the bottom wall 12 via the second fold line L2. The first and second outer flaps 16 and 17 are formed in a substantially rectangular shape elongated in the step direction. The dimension in the step direction of each outer flap 16 and 17 is substantially the same as the dimension in the step direction of the bottom wall 12 and the top wall 10, and the dimension (extension dimension) in the flow direction of each outer flap 16 and 17 is each inner flap It is set slightly shorter than 14,15. In the first outer flap 16, a handle hole 16 </ b> A for a worker to hang a finger (hand) when transporting the packaging box 1 is opened. The hand-handling hole 16A is formed in a substantially elliptical shape near the approximate center of the first outer flap 16.

  At the boundary between each first outer flap 16 and the top wall 10, a pair of disassembly and cutting lines L3 extending in the step direction is formed. The disassembly and cutting line L3 is a zipper formed by arranging a plurality of substantially L-shaped incisions at predetermined intervals. The two pairs of disassembly and cutting lines L3 are shaped so as to be symmetrical in the step direction so as to coincide with each other when folded at the center in the step direction. The two pairs of dismantling cutting lines L3 respectively have a function of cutting the ceiling wall 10 and the first outer flap 16 from the center in the step direction toward both outsides.

[Open line structure]
This blank 5 is provided with an opening structure 20 for dividing and opening part or all of the packaging box 1 up and down.

  As shown in FIG. 2, the unsealing structure 20 includes two unsealing start parts 21, two pairs of auxiliary folding curves 22, four first cutting lines 23, and four second cutting lines 24. , Two third cutting lines 25 and an opening fold line 26. The opening start portion 21 and the pair of auxiliary folding lines 22 are formed on the first side wall 11 and the second side wall 13. Two first cutting lines 23 are formed on each of the first side wall 11 and the second side wall 13. The second cutting line 24 is formed on the first inner flap 14 and the second inner flap 15. The third cutting line 25 is formed in the first outer flap 16. The opening fold curve 26 is formed on the top wall 10. In addition, since the opening structure 20 is a shape and arrangement which becomes symmetrical longitudinally and laterally in the state which assembled the packaging box 1, it is mainly formed in the 1st side wall 11 and a pair of 1st inner flaps 14 hereafter The opening start portion 21, the pair of auxiliary folding curves 22, the first cutting line 23, the second cutting line 24, and the like will be described.

<Opening section>
The opening start portion 21 is formed near the center in the flow direction of the first side wall 11 and slightly below the center in the step direction (on the side of the bottom wall 12). The opening start portion 21 is formed in a substantially hexagonal shape long in the flow direction (left and right direction). The outline of the opening start portion 21 is formed with a pressing and cutting line 21A in which a plurality of incisions are arranged at predetermined intervals. On one side of the top wall 10 side (upper side) of the opening start portion 21, a pressed ruled line 21 B (general-purpose ruled line) is formed instead of a cut. The opening start portion 21 has a function of forming an opening H (see FIG. 4) for grasping the first side wall 11.

<Auxiliary curve>
The pair of auxiliary folding lines 22 is formed on the side (upper side) of the ceiling wall 10 with respect to the opening start portion 21 (the first cutting line 23) on the first side wall 11. The pair of auxiliary folding lines 22 obliquely extend from the vicinity of both ends in the flow direction of the opening start portion 21 to the vicinity of the corner on the ceiling wall 10 side. That is, the pair of auxiliary folding curves 22 extend away from each other from the opening start portion 21 toward the top wall 10 (upper side). The pair of auxiliary folding lines 22 are general ruled lines for making the first side wall 11 mountain-fold.

<First cutting line>
The two first cutting lines 23 are formed on the first side wall 11 so as to extend in the flow direction (left and right direction). The two first cutting lines 23 are formed from the unsealing start portion 21 (near the center in the left-right direction) to the boundary (second fold line L2) with the pair of first inner flaps 14. The two first cutting lines 23 are formed to be inclined toward the top wall 10 (upward) from the vicinity of the center in the flow direction toward both outsides. An angle D1 formed by the first cutting line 23 and a horizontal line parallel to the first bending line L1 is set to, for example, about 10 degrees. The two first cutting lines 23 are formed in a substantially V-shape symmetrical in the flow direction about the unsealing start portion 21. The first cutting line 23 is a zipper formed by arranging a plurality of substantially L-shaped incisions at predetermined intervals. The two first cutting lines 23 have a function of cutting the first side wall 11 from the center in the flow direction toward both sides.

<Second cutting line>
The two second cutting lines 24 are formed to extend in the flow direction (front-rear direction) continuously to the first cutting line 23 by the pair of first inner flaps 14. The second cutting line 24 is formed to be inclined toward the top wall 10 (upper side) from the connecting portion with the first cutting line 23 toward the tip of the first inner flap 14. The second cutting line 24 is a zipper formed on the extension of the first cutting line 23, and is inclined at the same angle D1 as the first cutting line 23. The second cutting line 24 has a function of cutting the first inner flap 14 from the proximal end toward the distal end.

<Third cutting line>
The two third cutting lines 25 are formed so as to extend substantially in parallel with the first fold line L <b> 1 at substantially the center in the step direction of the pair of first outer flaps 16. The third cutting line 25 is formed from the tip of the first outer flap 16 to the dismantling cutting line L3 with the handle hole 16A interposed therebetween. The third cutting line 25 is a zipper formed by arranging a plurality of substantially Y-shaped incisions at predetermined intervals. The third cutting line 25 has a function of cutting the first outer flap 16 from the tip toward the base end (the side of the ceiling wall 10).

<Open fold curve>
The opening fold line 26 is formed in a state of extending substantially in parallel with the first fold line L <b> 1 at the approximate center of the top wall 10 in the step direction. The unfolding curve 26 is formed along a line connecting the two third cutting lines 25. The unfolded folding curve 26 is formed by arranging four reverse ruled lines formed by collapsing a corrugated cardboard sheet in the thickness direction from the side of the front liner 9B in a straight line at equal intervals. The opening fold curve 26 has a function to valley fold the ceiling wall 10.

[Packaging Box Seal]
Next, with reference to FIG. 1 and FIG. 3, the procedure (assembly procedure) which seals the packaging box 1 is demonstrated. FIG. 3 is a side view showing the packaging box 1. The packaging box 1 may be assembled manually by a worker, or may be fully or semi-automatically assembled by a packaging apparatus (wrap around caser). Here, as an example, a case where a packaging apparatus (not shown) assembles the packaging box 1 fully automatically will be described.

  The packaging apparatus assembles the packaging box 1 by appropriately bending the set blank 5. Specifically, the packaging device bends the first side wall 11 at a substantially right angle along the first fold line L1, and places the accumulated contents on the bottom wall 12. Subsequently, the packaging apparatus bends the second side wall 13 and the top wall 10 substantially at right angles along the first fold line L1, and applies an adhesive to the back surface of the passage piece 18. The wrapping device bends the passage piece 18 along the passage curve L10 at a substantially right angle, and superposes and joins the passage piece 18 to the second side wall 13 (see FIG. 1). In addition, as an adhesive agent, a hot-melt adhesive agent, a synthetic resin type | system | group emulsion adhesive agent, a double-sided tape etc. can be used, for example. In addition, although the passage piece 18 is bonded to the surface of the second side wall 13, the present invention is not limited to this, and may be bonded to the back surface of the second side wall 13.

  As shown in FIG. 1, in this state, the first side wall 11 and the second side wall 13 are arranged corresponding to the edge portions of the bottom wall 12 extending in the left-right direction, and in an upright posture facing each other in the front-rear direction. Provided. The top wall 10 continuously provided at the end of the first side wall 11 is provided to face the bottom wall 12 from above. The top wall 10, the first side wall 11, the bottom wall 12, and the second side wall 13 form a substantially rectangular cylindrical peripheral wall 1W having openings at both end surfaces in the left-right direction. The contents are in a state of being encased in the peripheral wall 1W.

  Next, the packaging device bends the pair of first inner flaps 14 and the pair of second inner flaps 15 inward along the second fold line L2. The tip portions of the first inner flap 14 and the second inner flap 15 abut each other, and the two handle concave portions 14A and 15A facing each other at the butt portion form one substantially elliptical opening. Subsequently, the packaging device applies an adhesive to the surface of each of the inner flaps 14, 15 in place. The packaging device bends the pair of first outer flaps 16 and the pair of second outer flaps 17 inward along the second fold line L2. The first outer flap 16 and the second outer flap 17 are adhered to the first inner flap 14 and the second inner flap 15 in an overlapping manner, and close the opening of the peripheral wall 1W.

  By the above, the packaging box 1 is in a sealed state. In this state, the end face portion formed by the plurality of flaps 14 to 17 is disposed corresponding to the edge portion of the bottom wall 12 extending in the front-rear direction, and is provided in an upright posture facing each other in the left-right direction. In addition, the handle holes 16A of the first outer flap 16 are disposed to coincide with the two handle recesses 14A and 15A.

  As shown in FIG. 3, in the assembled state of the packaging box 1, the tip end of the first outer flap 16 and the tip end of the second outer flap 17 are separated, and the first and second inner flaps 14, 15 are separated. The second cutting line 24 formed on the bottom of the second outer flap 17 is exposed from between the first outer flap 16 and the second outer flap 17. Further, the third cutting line 25 is formed to extend continuously toward the ceiling wall 10 (upper side) continuously to the cutting direction downstream end of the second cutting line 24. The second cutting line 24 is directed toward the ceiling wall 10 from the upstream side to the downstream side in the cutting direction so that an angle D2 formed with the third cutting line 25 is an obtuse angle (an angle larger than 90 degrees and smaller than 180 degrees). It is formed in the inclined state.

[Open packaging box]
Next, the opening procedure of the packaging box 1 will be described. The packaging box 1 is opened by opening the front upper portion or the rear upper portion or the entire upper portion of the packaging box 1 using the opening structure 20.

<Opening procedure of upper front of packaging box>
First, with reference to FIGS. 3 to 5, the procedure for opening the front upper portion (upper portion on the side of the first side wall 11) of the packaging box 1 will be described. FIG. 4 is a perspective view showing a state where opening of the packaging box 1 has been started. FIG. 5 is a perspective view showing a state in which the front upper portion of the packaging box 1 is opened.

  As shown in FIG. 4, the operator pushes in the opening start portion 21 (see FIG. 1) formed on the first side wall 11. The opening start portion 21 is cut along the pressing cut line 21A and bent inward at the pressing ruled line 21B, and the opening hole H for gripping the first side wall 11 is formed. The operator puts a finger on the opening hole H and pulls the first side wall 11 toward the front or diagonally upward. Then, the first side wall 11 is cut from the center in the lateral direction toward the outside along the first cutting line 23 while being mountain-folded along the pair of auxiliary folding lines 22 (see the arrow in FIG. 4).

  When the worker further pulls the first side wall 11, each first inner flap 14 starts to be cut from the front toward the rear along the second cutting line 24 (see the arrow in FIG. 4). Since the second cutting line 24 is formed as an extension of the first cutting line 23, the force (cutting force) for cutting the first side wall 11 is transmitted to the second cutting line 24 without being largely damaged, It becomes a force (cutting force) to cut the inner flap 14.

  As the cutting of the first inner flaps 14 along the second cutting line 24 proceeds, the first outer flaps 16 of each start to be cut from the bottom to the top along the third cutting line 25 (arrow in FIG. 4) reference). As shown in FIG. 3, since the third cutting line 25 is set at an obtuse angle D2 with the second cutting line 24, the vertical component of the cutting force along the second cutting line 24 is The force is transmitted to the third cutting line 25 to be a force (cutting force) for cutting the first outer flap 16.

  After the pair of first outer flaps 16 is cut, the operator bends the top wall 10 upward (or rearward) along the opening fold curve 26 (see the two-dot chain line in FIG. 3). Then, as shown in FIG. 5, the upper portion of the first side wall 11, the upper portion of the first inner flap 14, the front portion of the first outer flap 16 and the front portion of the top wall 10 Is open. As a result, the packaging box 1 is opened, and the contents accommodated in the packaging box 1 can be taken out.

  The front upper portion of the packaging box 1 remains connected to the rear side of the ceiling wall 10 through the opening fold curve 26. Therefore, the front upper part of the packaging box 1 flipped up with the open folding curve 26 as a fulcrum can be closed again. Thereby, after taking out a part of contents from packaging box 1, resealing can be carried out simply. As a result, the remaining contents can be stored.

  It should be noted that the upper rear side may be opened instead of the upper front side of the packaging box 1. The procedure for opening the rear upper portion (upper portion on the side of the second side wall 13) of the packaging box 1 is substantially the same as the procedure for opening the front upper portion of the packaging box 1 described above.

<Opening procedure of entire upper part of packaging box>
Next, with reference to FIG. 6 and FIG. 7, the procedure which open | releases the whole upper part of the packaging box 1 is demonstrated. FIG. 6 is a side view showing a state in which the entire upper portion of the packaging box 1 is opened. FIG. 7 is a perspective view showing a state in which the entire upper part of the packaging box 1 is opened. In the following description, it is assumed that the front upper part (upper part on the side of the first side wall 11) of the packaging box 1 is in an open state (see FIG. 5).

  The operator opens the rear upper portion (upper portion on the side of the second side wall 13) of the packaging box 1 in substantially the same procedure as the procedure for opening the front upper portion of the packaging box 1 described above. Specifically, the worker puts a finger on the opening hole H formed by pressing the opening start portion 21 of the second side wall 13 and pulls the second side wall 13 forward or diagonally upward. Then, the second side wall 13 is cut from the center in the left-right direction toward the outside along the first cutting line 23 while being mountain-folded along the pair of auxiliary folding lines 22. When the worker further pulls on the second side wall 13, each pair of second inner flaps 15 is cut from the rear to the front along the second cutting line 24.

  By the above, the upper part of the second side wall 13 and the upper part of the second inner flap 15 are separated from the lower part of the packaging box 1, and the entire upper part of the packaging box 1 is in the open state. Thereby, since the whole lower part of the packaging box 1 functions as a tray, it can be displayed (displayed) at a shop front etc. in the state which accommodated the content in the tray.

  In the above description, the entire upper part of the packaging box 1 is opened by opening the rear upper part after opening the front upper part of the packaging box 1, but the present invention is not limited to this. For example, contrary to the above description, the front upper portion may be opened after the rear upper portion of the packaging box 1 is opened. In addition, the worker may open the front upper portion and the rear upper portion of the packaging box 1 substantially at the same time (see FIG. 6).

[Disassembly of the upper part of the packaging box]
Next, with reference to FIG. 8, the disassembling procedure of the packaging box 1 will be described. FIG. 8 is a perspective view showing a state where the upper part of the packaging box 1 is disassembled.

  The upper part (see FIGS. 6 and 7) of the packaging box 1 separated from the lower part of the packaging box 1 is stored in a disassembled state so as not to be bulky, and collected as waste at predetermined intervals. When disassembling the upper portion of the packaging box 1, the operator cuts the first outer flap 16 (see FIG. 7) divided at the third cutting line 25 along the dissection cutting line L3. The first outer flaps 16 are separated from the ceiling wall 10 in a state of being adhered to the respective inner flaps 14, 15. By the above, the upper portion of the packaging box 1 is in a state of being unfolded (disassembled) substantially flat. In addition, the upper part of the expanded packaging box 1 will be accumulated and stored in multiple numbers until it is discarded (recovered).

  In the packaging box 1 according to the first embodiment described above, the entire second cutting line 24 is formed in an upward slope from upstream to downstream in the cutting direction, and formed by the second cutting line 24 and the third cutting line 25. The angle D2 is an obtuse angle (see FIG. 3). According to this configuration, since the angle D2 around the intersection of the second cutting line 24 and the third cutting line 25 becomes gentle, the component force in the vertical direction of the cutting force along the second cutting line 24 is cut by the third cutting Can be transmitted to line 25. Thereby, packaging box 1 can be smoothly cut by small power along the 1st-3rd cutting lines 23-25. That is, the packaging box 1 can be easily opened.

  Moreover, in the packaging box 1 which concerns on 1st Embodiment, the two 1st cutting lines 23 were formed in the upslope toward the outer side from center vicinity of the left-right direction (refer FIG. 1). Here, it is assumed that the first cutting line 23 (hereinafter also referred to as “horizontal cutting line”) is formed substantially horizontally. Since the strength of the side walls 11 and 13 is lowered at the formation portion of the horizontal cutting line, the side walls 11 and 13 are easily folded in half around the horizontal cutting line. For this reason, when the packaging box 1 receives a compressive load, the side walls 11, 13 are easily broken at the horizontal cutting line so as to expand outward (the occurrence of so-called "bulge"). That is, there is a problem that the side walls 11 and 13 having a horizontal cutting line are easily buckled. Moreover, since the packaging box 1 in which the body swelling occurred has a deteriorated appearance, the packaging box 1 (the lower portion (tray) of the packaging box 1) in which the body swelling has occurred may not be exhibited at the store.

  On the other hand, in the packaging box 1 according to the first embodiment, since the two first cutting lines 23 are formed on the side walls 11 and 13 so as to form a substantially V shape, each side wall 11 and 13 is It is difficult to fold in half around the first cutting line 23. According to this configuration, it is possible to suppress the buckling of the side walls 11 and 13 due to the compressive load applied to the packaging box 1. Thereby, it is possible to suppress the body swelling of the packaging box 1 due to the buckling of the side walls 11 and 13 while securing the easy opening operation of the packaging box 1.

  Moreover, according to the packaging box 1 which concerns on 1st Embodiment, an operator puts a finger | toe (hand) in the opening hole H by pressing the opening start part 21 and forming the opening hole H (refer FIG. 4). Each side wall 11, 13 can be pulled. The opening operation of the packaging box 1 can be performed efficiently.

  Moreover, according to the packaging box 1 which concerns on 1st Embodiment, each side wall 11 and 13 is made easy to open by bending each side wall 11 and 13 at the auxiliary fold line 22 and bending it (refer FIG. 4). Can. Thereby, the force concerning cutting of each side wall 11 and 13 along the 1st cutting line 23 can be saved.

  Moreover, according to the packaging box 1 which concerns on 1st Embodiment, the front upper part (upper part by the side of the 1st side wall 11) of packaging box 1 and the back upper part (upper part by the side of 2nd side wall 13) of packaging box 1 Only one of them can be cut along the first to third cutting lines 23, 24, 25 and bounced up along the opening fold curve 26 of the ceiling wall 10.

  In addition, in the packaging box 1 which concerns on 1st Embodiment, although the 1st cutting line 23 inclined about 10 degree | times with respect to a horizontal line, this invention is not limited to this. For example, the angle D1 of the first cutting line 23 may be set in the range of 3 degrees to 30 degrees with respect to the horizontal line. By setting the angle D1 within this range, it is possible to achieve both of the two effects of easy opening of the packaging box 1 and suppression of body swelling. Moreover, in this packaging box 1, although the buckling of each side wall 11 and 13 was suppressed by the two 1st cutting lines 23 being formed in the substantially V shape, this invention is not limited to this . For example, when high compressive strength can not be obtained for the packaging box 1, the first cutting line 23 may be formed substantially horizontal (parallel to the first fold line L1) (not shown).

  Moreover, in the packaging box 1 which concerns on 1st Embodiment, although the 1st cutting line 23 and the 2nd cutting line 24 were formed on the same straight line (refer FIG. 2), it is not restricted to this but the 1st cutting line 23 and the second cutting line 24 may be formed at different angles (not shown).

  Further, in the packaging box 1 according to the first embodiment, all of the second cutting lines 24 are inclined upward from the upstream side toward the downstream side in the cutting direction, but the present invention is not limited to this. For example, as shown in FIG. 9, as the packaging box 1 according to the modification of the first embodiment, the second cutting line 27 may include a continuous line portion 27A and an inclined line portion 27B different in angle. The continuous line portion 27A is formed on an extension of the first cutting line 23. The inclined line portion 27B is formed between the continuous line portion 27A and the third cutting line 25. The inclined line portion 27B (angle D4) is inclined upward (toward the ceiling wall 10) from the upstream side to the downstream side in the cutting direction at an angle larger than the continuous line portion 27A (angle D3) (angle D3 <angle D4). ). Further, the intersection of the continuous line portion 27A and the first cutting line 23 is located below (the bottom wall 12 side) the intersection of the inclined line portion 27B and the third cutting line 25. As described above, the second cutting line 27 is inclined toward the ceiling wall 10 from the upstream side to the downstream side in the vicinity of the third cutting line 25 on the downstream side in the cutting direction, The angle D2 may be formed to be an obtuse angle. Also by this configuration (the second cutting line 27), the same operation and effect as the packaging box 1 (the second cutting line 24) described above can be obtained. In addition, the vicinity of the third cutting line 25 where the inclined line portion 27B is formed means, for example, the cutting direction downstream side than the middle of the entire length of the second cutting line 27. The inclined line portion 27B may be formed not only near the third cutting line 25 but also from the cutting direction upstream side of the middle of the entire length of the second cutting line 27 to the third cutting line 25, for example.

  Moreover, in the packaging box 1 according to the first embodiment, the first cutting line 23 is formed on the first and second side walls 11 and 13, and the second cutting line 24 is formed on the first and second inner flaps 14 and 15. Although the present invention is not limited thereto. For example, even if the first cutting line 23 is formed only on the first side wall 11 (or the second side wall 13) and the second cutting line 24 is formed only on the first inner flap 14 (or the second inner flap 15) Good. That is, the opening structure 20 may be formed so as to be able to open the front upper portion or the rear upper portion of the packaging box 1.

  Moreover, in the packaging box 1 which concerns on 1st Embodiment, although the 3rd cutting line 25 was formed in the approximate center of the front-back direction of the 1st outside flap 16, this invention is not limited to this. For example, the third cutting line 25 may be formed at a position closer to the front side or the rear side of the first outer flap 16. In this case, it is preferable to adjust the extension dimensions (butted positions) of the first and second inner flaps 14 and 15, the position of the unfolded folding curve 26, and the like in accordance with the position of the third cutting line 25.

  Moreover, in the packaging box 1 which concerns on 1st Embodiment, although the 1st-3rd cutting lines 23-25 and the dismantling cutting line L3 were formed with the zipper, this invention is not limited to this. For example, the first to third cutting lines 23 to 25 and the disassembly cutting line L3 may be lines for cutting a corrugated cardboard sheet, such as perforation lines formed by arranging a plurality of substantially linear cuts at predetermined intervals. Anything may be used.

  Moreover, in the packaging box 1 which concerns on 1st Embodiment, although the opening folding curve 26 was formed by arranging four reverse ruled lines in a line at equal intervals, this invention is not limited to this. For example, the opening folding curve 26 may be a single reverse crease formed in the left-right direction of the ceiling wall 10 (not shown). Moreover, the opening folding curve 26 is not limited to the reverse ruled line, and may be any line as long as the top wall 10 can be valley-folded, such as a lead crease in which a plurality of incisions are formed on a general ruled line or reverse ruled line.

Second Embodiment Outline of Packaging Box
Next, the packaging box 2 according to the second embodiment will be described with reference to FIGS. 10 to 12. FIG. 10 is a perspective view showing the packaging box 2. FIG. 11 is a plan view showing the blank 6 of the packaging box 2. FIG. 12 is a side view showing the packaging box 2. In the following description, components 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 correspond to the packaging box 1 are omitted.

  As shown in FIG. 10, the packaging box 2 is formed in a substantially rectangular parallelepiped shape that is long in the left-right direction. The packaging box 2 is an A-type box in which the upper and lower surfaces of the substantially square cylindrical peripheral wall 2W are closed and sealed. The packaging box 2 is formed by assembling the blank 6 (made of a cardboard sheet) shown in FIG.

[blank]
As shown in FIG. 11, the blank 6 includes a pair of side walls 30, a pair of end walls 31, a pair of bottom inner flaps 32, a pair of bottom outer flaps 33, a pair of inner upper flaps 34, and a pair of upper outer ends And a flap 35.

<Side wall, end wall>
The pair of side walls 30 and the pair of end walls 31 are arranged in a line in the flow direction, and are alternately provided continuously via a second fold line L2 extending in the step direction. A passage piece 36 is connected to one end of the side wall 30 in the flow direction via a second fold line L2. The side wall 30 and the end wall 31 are formed in a substantially rectangular shape having substantially the same size in the step direction. The end wall 31 as an example of the end surface portion is formed narrower in the flow direction than the side wall 30 as an example of the side surface portion.

<Inside bottom flap, Bottom outside flap>
The pair of bottom inner flaps 32 is connected to one step (lower end) of the step wall 31 in the step direction via the first fold line L1 extending in the flow direction. The bottom inner flap 32 is formed in a substantially rectangular shape elongated in the flow direction (approximately the same size as the size in the flow direction of the end wall 31). The step size (extension size) of the bottom inner flap 32 is set to about half of the flow direction size of the end wall 31. The pair of bottom outer flaps 33 is connected to one end in the step direction of the pair of side walls 30 via the first fold line L1. The bottom outer flap 33 is formed in a substantially rectangular shape elongated in the flow direction (approximately the same size as the size in the flow direction of the side wall 30). The step size (extension dimension) of the bottom outer flap 33 is set to be substantially the same as the extension dimension of the bottom inner flap 32.

<Inside heaven flap, outside sky flap>
The pair of in-the-sky flaps 34 is continuously provided at the other tier-direction other end (upper end) of the pair of end walls 31 via the first fold line L1. The pair of extraterrestrial flaps 35 are connected to the other end in the step direction of the pair of side walls 30 via the first bending line L1. The in-sky flap 34 is formed in substantially the same shape as the in-bottom flap 32, and the out-of-sky flap 35 is formed in substantially the same shape as the in-bottom outer flap 33.

[Open line structure]
This blank 6 is provided with an opening structure 40 for dividing and opening part or all of the packaging box 2 up and down.

  As shown in FIG. 11, the unsealing structure 40 includes two unsealing start parts 41, two pairs of first auxiliary folding curves 42A, two pairs of second auxiliary folding curves 42B, and two second ones. A first cutting line 43, two second cutting lines 44, and two third cutting lines 25 are included. The opening start portion 41, the pair of first auxiliary folding lines 42A, the pair of second auxiliary folding lines 42B, and the first cutting line 43 are formed in the pair of side walls 30. The second cutting line 44 and the third cutting line 25 are formed in the pair of end walls 31. In addition, since the opening structure 40 is a shape and arrangement which becomes symmetrical in the front and rear and right and left in a state where the packaging box 2 is assembled, the opening start mainly formed on one side wall 30 and one end wall 31 is hereinafter described. The portion 41, the respective auxiliary folding lines 42A and 42B, the first cutting line 43, the second cutting line 44 and the like will be described.

<Opening section>
The opening start portion 41 is formed near the center in the flow direction of the side wall 30 and slightly below the center in the step direction (the side of the bottom outer flap 33). The opening start portion 41 is formed in a substantially trapezoidal shape elongated in the flow direction (left and right direction). The opening start part 41 has a pair of pushing cutting lines 41A (a plurality of incisions) curved so as to approach each other from the first cutting line 43 described later toward the side (upper side) of the extraterrestrial flap 35. A pressed ruled line 41B (general-purpose ruled line) is formed between the ends of the pair of pressed and cut lines 41A.

<First Auxiliary Folding Curve, Second Auxiliary Folding Curve>
The pair of first auxiliary folding curves 42A and the pair of second auxiliary folding curves 42B are formed on the side wall 30 on the side (upper side) of the outer flap 35 than the first cutting line 43. The pair of first auxiliary folding curves 42A extend upward from the vicinity of the opening start portion 41 so as to be separated from each other. The pair of second auxiliary fold lines 42B extend away from each other from the top toward the lower side in the flow direction outside the pair of first auxiliary fold lines 42A. The pair of first auxiliary folding lines 42A is a general-purpose ruled line for making the side wall 30 mountain-fold. The pair of first auxiliary folding lines 42A are reverse ruled lines for valley-folding the side wall 30.

<First cutting line, second cutting line>
The first cutting line 43 is formed over the entire area in the flow direction of the side wall 30 slightly below the step center of the side wall 30. The first cutting line 43 is formed substantially in parallel with the first fold line L1. The first cutting line 43 is also formed on the passage piece 36. The second cutting line 44 is formed on the entire area in the flow direction of the end wall 31 slightly lower than the step center of the end wall 31. The first cutting line 43 and the second cutting line 44 are perforation lines formed by arranging a plurality of substantially linear cuts at predetermined intervals. The first cutting line 43 has a function of cutting the side wall 30, and the second cutting line 44 has a function of cutting the end wall 31.

  As shown in FIGS. 11 and 12, the second cutting line 44 is a cutting direction such that an angle D2 between the second cutting line 25 and the third cutting line 25 is an obtuse angle in the vicinity of the third cutting line 25 on the downstream side in the cutting direction. It is formed to be inclined to the side (upper side) of the in-sky flap 34 from the upstream toward the downstream. The second cutting line 44 includes a continuous line portion 44A formed on an extension of the first cutting line 43, and an inclined line portion 44B formed between the continuous line portion 44A and the third cutting line 25; Contains.

  The continuous line portion 44 </ b> A is formed continuously to the first cutting line 43 over the entire area in the flow direction of the end wall 31. The pair of first cutting lines 43 and the pair of continuous line portions 44A (second cutting lines 44) are alternately and continuously formed over the entire area in the flow direction of the blank 6. That is, in a state where the packaging box 2 is assembled, the first cutting line 43 and the continuous line portion 44A are formed in parallel with the first fold line L1 over the entire circumference of the peripheral wall 2W.

  By the way, the corrugated-cardboard sheet which comprises the blank 6 is manufactured by performing the bonding process of a corrugated-cardboard base paper using the apparatus called corrugator (not shown). The corrugator applies the liners 9B and 9C to both sides of the middle ring 9A while advancing the middle ring 9A in the flow direction. Further, the corrugator forms a first fold line L1, a first cutting line 43 and a continuous line portion 44A on a corrugated cardboard sheet traveling in the flow direction, and cuts the corrugated cardboard sheet continuous in the flow direction into a predetermined length. Thus, the first fold line L1, the first cutting line 43 and the continuous line portion 44A are formed continuously by the corrugator in the entire flow direction of the blank 6. The second fold L2, the opening start portion 41, the respective auxiliary folds 42A and 42B, the inclined line 44B, and the like may be combined with the flexo folder glue (not shown) in a later process than the corrugated sheet manufacturing process by the corrugator. It is formed using a device called.

  As shown in FIGS. 11 and 12, the inclined line portion 44B is curved to be convex upward. The inclined line portion 44B is formed in a substantially semicircular shape near the center in the flow direction of the continuous line portion 44A. The third cutting line 25 described above is formed to extend upward (inward flap 34) from the top (middle part) of the substantially semi-circular inclined line portion 44B. The inclined line portion 44B is formed such that an angle D2 formed by a straight line S connecting the intersection point P1 with the continuous line portion 44A to the intersection point P2 with the third cutting line 25 and the third cutting line 25 is an obtuse angle (See Figure 12). The inclined line portion 44B (the angle D4 of the straight line S) is a side larger than the continuous line portion 44A (the angle D3 (in the second embodiment, D3 = 0 degrees)). (Upwardly) inclined (angle D3 <angle D4). Further, the intersection of the continuous line portion 44A and the first cutting line 43 is located below the intersection of the inclined line portion 44B and the third cutting line 25.

[Packaging Box Seal]
Next, with reference to FIG. 10 and FIG. 12, the procedure (assembly procedure) which seals the packaging box 2 is demonstrated. Here, as an example, a case where a worker assembles the packaging box 2 will be described. In addition, the passage piece 36 is adhered to the inner surface of the opposite end wall 31 with an adhesive, and the packaging box 2 is in a folded state.

  The operator bends the pair of side walls 30 and the pair of end walls 31 substantially at right angles along the second bending line L2, makes the pair of side walls 30 face in the front-rear direction, and faces the pair of end walls 31 in the left-right direction Let Then, the pair of side walls 30 and the pair of end walls 31 form a peripheral wall 2W having openings at both end surfaces in the vertical direction.

  Next, the worker closes the opening of the peripheral wall 2W by the inner bottom flap 32, the bottom outer flap 33, the upper inner flap 34, and the upper outer flap 35 continuously connected to the peripheral wall 2W via the first bending line L1. Specifically, the worker bends the bottom inner flap 32 substantially at right angles along the first fold line L1, and adheres the adhesive to the surface of the bottom inner flap 32. Subsequently, the worker bends the bottom outer flap 33 substantially at right angles along the first fold line L1. Then, the pair of bottom outer flaps 33 is adhered to the bottom inner flap 32 via an adhesive in a state where the tip end portions thereof are butted. The pair of bottom outer flaps 33 close the lower opening of the peripheral wall 2W in a state of being superimposed on the pair of bottom inner flaps 32 (see FIG. 10). The bottom inner flap 32 and the bottom outer flap 33 form the bottom of the packaging box 2. In this state, the worker accommodates the contents in the interior (bottom) of the packaging box 2.

  Next, the operator bends the in-sky flap 34 at a substantially right angle along the first fold line L1, and adheres the adhesive to the surface of the in-sky flap 34. Subsequently, the worker bends the extraterrestrial flap 35 at a substantially right angle along the first fold line L1. Then, the pair of outside flaps 35 are adhered to the inside flap 34 via an adhesive in a state where their tips are butted. The pair of extraterrestrial flaps 35 close the opening at the upper side of the peripheral wall 2W in a state of being superimposed on the pair of intraparenchyma flaps 34 (see FIG. 10). The inside flaps 34 and the outside flaps 35 form the top of the packaging box 2.

  By the above, the packaging box 2 is in a sealed state. In this state, the third cutting line 25 is formed so as to extend from the second cutting line 44 at the end wall 31 to a position corresponding to the butting portion 45 of the tip of the pair of overhead flaps 35 (FIG. 12) reference). In addition, the center 9A extends along the vertical direction of the packaging box 2. In addition, although each outer flap 33 and 35 was being fixed to each inner flap 32 and 34 with an adhesive agent, it may be fixed not only with this but with an adhesive tape etc.

[Open packaging box]
Next, the opening procedure of the packaging box 2 will be described.

<Opening procedure of upper front of packaging box>
First, the procedure for opening the front upper portion of the packaging box 2 will be described with reference to FIGS. 12 to 14. FIG. 13 is a perspective view showing the state where opening of the packaging box 2 has been started. FIG. 14 is a perspective view showing a state in which the front upper portion of the packaging box 2 is opened.

  As shown in FIG. 13, the worker puts a finger on the opening hole H formed by pressing the opening start portion 41 (see FIG. 10) and pulls the side wall 30 forward or obliquely upward. Then, the side wall 30 is mountain-folded along the pair of first auxiliary fold lines 42A and valley-folded along the pair of second auxiliary fold lines 42B from the center in the left-right direction along the first cutting line 43 It is cut outward (see the arrow in FIG. 13).

  When the worker further pulls the side wall 30, each end wall 31 is cut from the front toward the rear along the continuous line portion 44A of the second cutting line 44 (see the arrow in FIG. 13). Further, the end wall 31 cut at the continuous line portion 44A is cut from the front to the rear along the inclined line portion 44B and is cut from the lower side to the upper side along the third cutting line 25 (see FIG. See arrow 13). As shown in FIG. 12, the third cutting line 25 has an obtuse angle formed with the inclined line portion 44B (straight line S), so the vertical component of the cutting force along the inclined line portion 44B. Is transmitted to the third cutting line 25 to become a force (cutting force) for cutting the end wall 31.

  After the pair of end walls 31 is cut, the operator bends the pair of inner flaps 34 upward (or backward) at a position along the butting portion 45 of the tip of the pair of extraterrestrial flaps 35 (see FIG. 12). Refer to the two-dot chain line). That is, the butting portion 45 is a virtual valley fold line for valley-folding the pair of in-sky flaps 34. Then, as shown in FIG. 14, the upper portion of the side wall 30, the front upper portion of the end wall 31, and the front portion of the inner flap 34 are flipped up, and the front upper portion of the packaging box 2 is in an open state. As a result, the packaging box 2 is opened, and the contents accommodated in the packaging box 2 can be taken out.

  It should be noted that the upper rear side may be opened instead of the upper front side of the packaging box 2. The procedure for opening the rear upper portion of the packaging box 2 is substantially the same as the procedure for opening the front upper portion of the packaging box 2 described above, and thus the detailed description thereof will be omitted.

<Opening procedure of entire upper part of packaging box>
Next, with reference to FIG. 15 and FIG. 16, the procedure which open | releases the whole upper part of the packaging box 2 is demonstrated easily. FIG. 15 is a side view showing a state in which the entire upper portion of the packaging box 2 is opened. FIG. 16 is a perspective view showing a state in which the entire upper part of the packaging box 2 is opened.

  With the front upper part of the packaging box 2 opened, the operator opens the rear upper part of the packaging box 2 in substantially the same procedure as the procedure for opening the front upper part of the packaging box 2 described above. Then, the entire upper portion of the packaging box 2 is separated from the entire lower portion. In addition, since a specific procedure is substantially the same as the procedure which opens the front upper part of the packaging box 2, the description is abbreviate | omitted. Thereby, since the whole lower part of the packaging box 1 functions as a tray, it can be displayed (displayed) at a shop front etc. in the state which accommodated the content in the tray. Although a portion (a substantially semicircular portion) surrounded by the continuous line portion 44A and the inclined line portion 44B remains at the lower part of the packaging box 2, this may be left as it is, or along the continuous line portion 44A. You may cut it.

  In the above description, the entire upper part of the packaging box 2 is opened by opening the rear upper part after opening the front upper part of the packaging box 2, but the present invention is not limited to this. For example, contrary to the above description, the front upper portion may be opened after the rear upper portion of the packaging box 2 is opened. In addition, the worker may open the front upper portion and the rear upper portion of the packaging box 2 substantially simultaneously.

  According to the packaging box 2 which concerns on 2nd Embodiment described above, the effect | action similar to the packaging box 1 which concerns on 1st Embodiment, etc. can be acquired, such as being able to open the packaging box 2 easily.

  Further, according to the packaging box 2 according to the second embodiment, since the continuous line portion 44A is formed on the same straight line as the first cutting line 43 (see FIG. 11), cutting along the first cutting line 43 The force can be transmitted to the continuous wire portion 44A without waste. In addition, since the inclined line portion 44B is formed in an upward slope from the continuous line portion 44A to the third cutting line 25 (see FIG. 12), the vertical component of the cutting force along the inclined line portion 44B is It can be transmitted to the third cutting line 25. Thereby, the opening operation of the packaging box 1 can be easily performed.

  Moreover, in the packaging box 2 which concerns on 2nd Embodiment, the 1st cutting line 43 and the 2nd cutting line 44 were comprised with the perforation line extended over the whole flow direction of the blank 6 (refer FIG. 11). According to this configuration, in the process of manufacturing the corrugated cardboard sheet by the corrugator, the perforation line can be formed at the same time as the first fold line L1. Thereby, the first and second cutting lines 43, 44 can be formed in a short time with high accuracy as compared with the case where the first and second cutting lines 43, 44 are formed using a flexo folder gluer in a later step. it can.

  Further, in the packaging box 2 according to the second embodiment, the pair of in-sky flaps 34 is formed so as to be valley-foldable along the butting portion 45 of the tip of the pair of out-of-sky flaps 35 (FIG. 12 and FIG. See Figure 14). According to this configuration, only one selected from the front upper part and the rear upper part of the packaging box 2 is cut along the first to third cutting lines 43, 44, 25 and the tips of the pair of extraterrestrial flaps 35 The virtual valley fold line set along the butt portion 45 of the portion can be flipped up. In addition, the front upper portion or the rear upper portion of the packaging box 2 can be simply closed again after being opened. This makes it possible to take out only part of the contents and store the remaining contents.

  In addition, in the packaging box 2 which concerns on 2nd Embodiment, although the inclined line part 44B of the 2nd cutting line 44 was formed in the substantially semicircle shape which becomes convex toward upper direction, this invention is not limited to this. For example, as shown in FIG. 17A, the inclined line portion 44B may be curved to be convex toward the bottom outer flap 33 (downward). Moreover, as shown to FIG. 17B, the inclined line part 44B may be formed linearly. Further, as shown in FIG. 17C, the inclined line portion 44B may be formed in a substantially trapezoidal shape which is convex upward.

  Further, in the packaging box 2 according to the second embodiment (including the respective modifications, the same applies to the following), the continuous line portion 44A of the first cutting line 43 and the second cutting line 44 is substantially parallel to the first folding line L1. Although formed, the present invention is not limited thereto. For example, in the packaging box 2 according to the second embodiment, the first cutting line 23 and the second cutting lines 24 and 27 formed in the packaging box 1 according to the first embodiment (including the modification, the same applies to the following). It may be applied. Also, similarly to this, the first cutting line 43 and the second cutting line 44 formed in the packaging box 2 according to the second embodiment may be applied to the packaging box 1 according to the first embodiment.

  Moreover, in the packaging box 2 which concerns on 2nd Embodiment, although a pair of sky inner flap 34 was bend | folded along the butt part 45 of the front-end | tip part of a pair of sky outer flaps 35, this invention is not limited to this. For example, a valley fold line such as a reverse ruled line may be formed at a position along the butting portion 45 of the tip end portion of the pair of skyward flaps 35 in the pair of skyward flaps 34 (not shown).

  Moreover, in the packaging box 2 which concerns on 2nd Embodiment, although the 3rd cutting line 25 was formed in the approximate center of the front-back direction of the end wall 31, this invention is not limited to this. For example, the third cutting line 25 may be formed at a position closer to the front side or the rear side of the end wall 31. In this case, it is preferable to adjust the extension dimension (butting portion 45) of the pair of sky outside flaps 35 in accordance with the position of the third cutting line 25.

  Moreover, in the packaging box 2 which concerns on 2nd Embodiment, although the 1st and 2nd cutting lines 43 and 44 were formed by the perforation line, this invention is not limited to this. For example, the first and second cutting lines 43 and 44 may be any lines for cutting a corrugated sheet such as zippers.

  Moreover, in the packaging box 2 which concerns on 2nd Embodiment, although the opening start part 41 was formed above the 1st cutting plane line 43 in the side wall 30, this invention is not limited to this. For example, the opening start portion 41 may be formed below the first cutting line 43 (see FIG. 18A), or may be formed at a position (crossing position) at which the first cutting line 43 is divided. (See FIG. 18B). Moreover, similarly to this, the opening start part 21 of the packaging box 1 according to the first embodiment may also be formed above or below the first cutting line 23 (not shown). Moreover, as long as the shape of each opening start part 21 and 41 can be put on a worker's finger, it may be any shape. Furthermore, although each opening start part 21 and 41 was connected to each side wall 11, 13 and 30 by each pressing line 21 B, 41 B, each opening start part 21 and 41 is each omitted by omitting each pressing line 21 B, 41 B. It may be separated from the side walls 11, 13, 30.

  In the packaging boxes 1 and 2 according to the first and second embodiments, the first cutting lines 23 and 43 are formed in a straight line, but the present invention is not limited thereto. For example, the first cutting lines 23 and 43 are curved or bent halfway May be (not shown).

  In the packaging boxes 1 and 2 according to the first and second embodiments, the third cutting line 25 extends substantially vertically. However, the present invention is not limited to this, and the third cutting line 25 may be inclined forward or backward. Even in this case, the second cutting lines 24, 44 (44B) are formed such that the angle formed with the third cutting line 25 is an obtuse angle.

  Further, in the packaging box 1 according to the first embodiment, the pair of auxiliary folding curves 22 are formed on the side walls 11 and 13, and in the packaging box 2 according to the second embodiment, the pair of first auxiliary folding curves 42A and the pair The second auxiliary fold line 42B is formed on the side wall 30, but these auxiliary fold lines 22, 42A, 42B may be omitted.

  The shapes, sizes (dimensions), and the like of the packaging boxes 1 and 2 according to the first and second embodiments are merely examples, and can be appropriately changed according to the shapes and sizes of contents. In addition, the types and the like of the packaging boxes 1 and 2 according to the first and second embodiments can be changed as appropriate, and in various types of boxes, the first cutting lines 23 and 43 are formed at positions corresponding to the side portions. The second cutting lines 24, 27, 44 and the third cutting line 25 may be formed at positions corresponding to the end face portions.

  Moreover, although the packaging boxes 1 and 2 which concern on 1st and 2nd embodiment were formed with the paper-made double-sided corrugated sheet, this invention is not limited to this. For example, the corrugated sheet may be a single-sided corrugated sheet in which a liner is attached to one side of the inner core 9A, or a double-sided corrugated sheet in which a single-sided corrugated sheet is bonded to a double-sided corrugated sheet. Further, for example, the packaging box 1 may be formed of a cardboard, a plate made of a resin, or the like, instead of a cardboard sheet made of paper.

  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 1W, 2W Peripheral wall 9A Center 9B Front liner 9C Back liner 10 Top wall (top)
11 1st side wall (side part)
12 Bottom wall (bottom)
13 2nd side wall (side part)
14 First inner flap (end face)
15 Second inner flap (end face)
16 1st outside flap (end face part)
17 2nd outside flap (end face part)
21 and 41 opening start part 22 auxiliary bending curve 23, 43 1st cutting line 24, 27, 44 2nd cutting line 25 3rd cutting line 26 opening bending curve 27A, 44A continuation line part 27B, 44B inclined line part 30 side wall ( Side part)
31 end wall (end face)
32 Bottom inner flap (bottom)
33 Bottom outside flap (bottom)
34 Flap in Heaven (Atenbe)
35 Tengai Flap (Atenbe)
42A 1st auxiliary bending line 42B 2nd auxiliary bending line 45 butt section D2 angle P1, P2 intersection point S straight line

Claims (10)

The bottom (12, 32, 33),
Side portions (11, 13, 30) arranged corresponding to the lengthwise extending edges of the bottom;
A pair of end face portions (14 to 17, 31) which are continuously provided at both end portions in the longitudinal direction of the side face portion and are disposed corresponding to the edge portions extending in the width direction intersecting the longitudinal direction of the bottom portion ,
And a top portion (10, 34, 35) which is provided continuously with at least one end of the side surface portion and the pair of end surface portions, and which faces the bottom portion,
The first cutting line (23, 43) is formed in the side surface portion so as to extend in the longitudinal direction,
A second cutting line (24, 27, 44) is formed on each of the end face portions so as to extend continuously in the width direction continuously with the first cutting line, and a third cutting line (25) is It is formed in a state of extending toward the top portion continuously to the second cutting line,
The second cutting line is upstream in the cutting direction such that an angle (D2) with the third cutting line is an obtuse angle in the vicinity of the third cutting line which is the whole or at least the cutting direction downstream side of the end face portion. A packaging box (1, 2) characterized in that it is formed in a state of being inclined to the side of the top portion from the lower side to the lower side.   The first cutting line (23) is formed so as to be inclined toward the top portion from the vicinity of the center in the length direction toward the boundary between the pair of end surfaces. Packaging box described. The second cutting line (27, 44) is
A continuous line portion (27A, 44A) formed on an extension of the first cutting line;
An inclined line portion (27B, 44B) formed between the continuous line portion and the third cutting line;
The inclined line portion is inclined toward the top portion from the upstream side to the downstream side in the cutting direction at an angle larger than the continuous line portion.
The intersection of the continuous line portion and the first cutting line is located closer to the bottom than the intersection point (P2) of the inclined line portion and the third cutting line. Or the packaging box as described in 2.   The inclined line portion is curved so as to be convex toward the top portion side or the bottom portion side, and an intersection point (P2) with the third cutting line from an intersection point (P1) with the continuous line portion The packaging box according to claim 3, characterized in that an angle formed by a straight line (S) connecting up to and the third cutting line is an obtuse angle. The side surface portion is formed with an opening start portion (21, 41) for gripping the side surface portion,
The packaging box according to any one of claims 1 to 4, wherein the first cutting line is formed across the boundary between the opening start portion and the pair of end surface portions.   A pair of auxiliary folding curves (22, 42A, 42B) for mountain-folding the side surface portion on the side of the top portion with respect to the first cutting line is formed in the side surface portion. The packaging box according to any one of 1 to 5. The side portion includes a first side wall (11) and a second side wall (13) opposed in the width direction,
The bottom portion and the top portion, and the first side wall and the second side wall are alternately connected to form a peripheral wall (1W) having openings at both end surfaces in the longitudinal direction,
The pair of end faces is
A pair of first inner flaps (14) connected to both longitudinal ends of the first side wall;
A pair of second inner flaps (15) connected to both longitudinal ends of the second side wall;
A pair of first outer flaps (16) connected to both ends of the upper portion in the lengthwise direction;
And a pair of second outer flaps (17) connected to both ends of the bottom in the lengthwise direction,
The first outer flap and the second outer flap close the opening of the peripheral wall in a state of being overlapped with the first inner flap and the second inner flap,
The first cutting line (23) is formed on the first side wall and the second side wall, respectively.
The second cutting line (24) is formed on the first inner flap and the second inner flap, respectively.
The third cutting line (25) is formed on the first outer flap,
The open top curve according to any one of claims 1 to 6, wherein an open fold curve (26) for valley-folding the top portion is formed on the top portion along a line connecting two of the third cutting lines. Packaging box described in (1). The side portion includes a pair of side walls (30) opposed in the width direction,
The pair of end surface portions includes a pair of end walls (31) opposed in the longitudinal direction,
The pair of side walls and the pair of end walls are alternately provided in a row and form a peripheral wall (2W) having openings at both end faces in the vertical direction,
The bottom is
A pair of bottom inner flaps (32) connected to the lower ends of the pair of end walls;
And a pair of bottom outer flaps (33) continuously connected to the lower ends of the pair of side walls and closing the opening on the lower side of the peripheral wall in a state of being overlapped with the pair of bottom inner flaps;
The top part is
A pair of in-sky flaps (34) connected to the upper end of the pair of end walls;
And a pair of extraterrestrial flaps (35) continuously connected to the upper ends of the pair of side walls and closing the opening on the upper side of the peripheral wall in a state of being superimposed on the pair of intraparenchyma flaps;
The first cutting lines (43) are respectively formed on the pair of side walls,
The second cutting lines (44) are respectively formed on the pair of end walls,
A third cutting line (25) is formed on each of the pair of end walls so as to extend from a middle part of the second cutting line toward the top part. Packaging box (2) according to any of 6. The bottom portion, the side surface portion, the end surface portion, and the top portion are formed of corrugated cardboard sheets in which liners (9B, 9C) are bonded to a corrugated centerline (9A),
The center line extends along the vertical direction of the packaging box,
The inner bottom flap, the bottom outer flap, the upper inner flap and the upper outer flap are connected to the peripheral wall via a fold line extending in a flow direction orthogonal to a step direction parallel to the inner core,
The pair of first cutting lines and the pair of second cutting lines are perforation lines in which a plurality of incisions are arranged, and are alternately and continuously formed parallel to the folding line over the entire circumference of the peripheral wall A packaging box according to claim 8, characterized in that The pair of extraterrestrial flaps close the opening on the upper side of the peripheral wall in a state where their tips are butted,
The third cutting line is formed in the end wall so as to extend from the second cutting line to a position corresponding to the butting portion (45) of the tip of the pair of skylight flaps,
The packaging box according to claim 8 or 9, wherein the pair of inner sky flaps is formed so as to be valley-foldable at a position along the butting portion of the tip end portion of the pair of outer sky flaps.

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