JP6945402B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

Packaging boxes for packaging the contents are known.

For example, the corrugated cardboard packaging box described in Patent Document 1 includes a bottom plate, a set of facing side plates connected to the opposite side of the bottom plate, and an upper plate connected to the upper end of one side plate. It was equipped with flaps connected to both ends of the bottom plate, a pair of opposite side plates, and the top plate. The flaps connected to the upper plate (upper outer flaps) are overlapped with the flaps connected to each side plate (inner flaps), and the flaps connected to the bottom plate overlap the lower ends of the upper outer flaps to form the inner flaps. It was stuck. Further, in the upper and outer flaps, a gluing plate portion that can be separated by a cut line was fixed to the inner flap. In this corrugated cardboard packaging box, the upper plate is opened by lifting the upper plate and separating the pair of gluing plate portions from the pair of upper and outer flaps.

Jitsukaisho 61-129718

However, in the corrugated cardboard packaging box described above, the pair of gluing plate portions must be separated from the pair of upper and outer flaps at substantially the same time, and a large force is required to lift the upper plate. That is, the packaging box could not be easily opened with a small force.

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

In order to achieve the above object, the present invention is a packaging box for packaging the contents, which includes a bottom wall and a top wall facing each other, and a first side wall and a second side wall facing each other, and a shaft. A peripheral wall formed in a cylindrical shape with both end faces in the direction, a pair of first inner flaps connected to both ends in the axial direction of the first side wall, and both ends in the axial direction of the second side wall are connected to each other. A pair of second inner flaps, a pair of first outer flaps connected to both axial ends of the bottom wall, and a pair of second outer flaps connected to both axial ends of the top wall. A pair of top walls formed at positions offset in one axial direction so as to be asymmetric so that they do not completely overlap when inverted at the center line extending in the width direction orthogonal to the axial direction at the center of the top wall in the axial direction. The first auxiliary ruled line, the opening line formed on one side of the peripheral wall on the first side wall side in the width direction and separating the top wall from the peripheral wall, and the pair of second inner flaps formed on the pair. A pair of cutting lines for cutting the second inner flap and dividing it into two in the vertical direction are provided, and the first outer flap is folded under the first inner flap and the second inner flap. The second outer flap is bonded to the second inner flap at least in a state of being folded on the upper side of the first inner flap and the second inner flap. Bonded through the portions, the cutting line is formed on the second inner flap so as to partition the first adhesive portion and the second adhesive portion, and pulls up the top wall separated by the opening line. In the process, the top wall is mountain-folded by the pair of first auxiliary ruled lines, so that the second inner flap in one axial direction starts to be cut by the cutting line, and then the second inner flap in the axial direction is cut. Begins to be cut at the cutting line.

Further, in order to achieve the above object, the present invention is a packaging box for packaging the contents, and includes a bottom wall and a top wall facing each other, and a first side wall and a second side wall facing each other. , A cylindrical peripheral wall with both axial end faces open, a pair of first inner flaps connected to the axial end ends of the first side wall, and an axial end end of the second side wall. A pair of second inner flaps, a pair of first outer flaps connected to both axial ends of the bottom wall, and a pair of second outer flaps connected to both axial ends of the top wall. It is formed at a position offset in one axial direction so as to be asymmetric so that it does not completely overlap when inverted at the flap and the center line extending in the width direction orthogonal to the axial direction at the center of the top wall in the axial direction. A pair of first auxiliary ruled lines, an opening line formed in one of the width directions of the peripheral wall on the first side wall side and separating the top wall from the peripheral wall, and the pair of first outer flaps or the pair of first. The first outer flap is formed on the second outer flap and includes a pair of first outer flaps or a pair of cutting lines for cutting the pair of second outer flaps and dividing the pair into two in the width direction. The first outer flap is the first outer flap. The first inner flap and the second inner flap are folded under the first adhesive portion and adhered to each other via the first adhesive portion, and the second outer flap is formed by the first inner flap and the second inner flap. In a state of being folded upward, it is adhered to at least the second inner flap via the second adhesive portion, and the cutting line is formed between the first adhesive portion and the second adhesive portion provided on the second inner flap. In the process of pulling up the top wall formed on the first outer flap or the second outer flap so as to partition one of them and separated by the opening line, the top wall is the pair of first. By mountain-folding along the auxiliary ruled line, the first outer flap on one axial direction or the second outer flap on one axial direction begins to be cut at the cutting line, and then the first outer flap on the other axial direction or The other axially opposite outer flap begins to be cut at the cutting line.

Further, in order to achieve the above object, the present invention is a packaging box for packaging the contents, and includes a bottom wall and a top wall facing each other, and a first side wall and a second side wall facing each other. , A cylindrical peripheral wall with both axial end faces open, a pair of first inner flaps connected to the axial end ends of the first side wall, and an axial end end of the second side wall. A pair of second inner flaps, a pair of first outer flaps connected to both axial ends of the bottom wall, and a pair of second outer flaps connected to both axial ends of the top wall. The flap and the center line extending in the width direction orthogonal to the axial direction at the center of the top wall in the axial direction are formed at positions offset in one axial direction so as to be asymmetric so as not to completely overlap when inverted. The first outer flap includes a pair of first auxiliary ruled lines and an opening line formed on one side of the peripheral wall on the first side wall side in the width direction and separating the top wall from the peripheral wall. The first inner flap and the second inner flap are folded under the first adhesive portion and adhered to each other via the first adhesive portion, and the second outer flap is formed by the first inner flap and the second inner flap. In the process of pulling up the top wall separated by the opening line, the top wall is adhered to at least the second inner flap in a state of being folded upward via the second adhesive portion, and the top wall is attached to the pair of first auxiliary. By folding the mountain along the ruled line, the second outer flap on one axial direction starts to peel off from the second adhesive portion, and then the second outer flap on the other axial direction starts to peel off from the second adhesive portion.

In this case, it is located on the other side of the top wall in the width direction, is formed so as to be asymmetrical so as not to completely overlap when inverted at the center line, and approaches the center line from one side in the width direction toward the other. In the process of further providing a pair of second auxiliary ruled lines extending diagonally as described above and pulling up the top wall while folding the top wall with the pair of first auxiliary ruled lines, the top wall is formed by the pair of second auxiliary ruled lines. It is preferable to fold it in a valley.

In this case, it is preferable that the second outer flap folds without being adhered to the upper side of the first inner flap.

In this case, it is preferable that the tip end portion of the first outer flap is adhered to the first inner flap and the second inner flap in a state of overlapping the outer tip portion of the second outer flap.

According to the present invention, the packaging box can be easily opened with a small force.

It is a perspective view which shows the wraparound case which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the wraparound case which concerns on 1st Embodiment of this invention. It is a perspective view which shows the opening process of the wraparound case which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which opened the wraparound case which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the wraparound case which concerns on the modification of 1st Embodiment of this invention. It is a perspective view which shows the wraparound case which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the wraparound case which concerns on 3rd Embodiment of this invention. It is a top view which shows the blank of the wraparound case which concerns on 4th Embodiment of this invention. It is a top view which shows the blank (the first auxiliary ruled line) of the wraparound case which concerns on other modification such as 1st Embodiment of this invention. It is a top view which shows the blank (opening part) of the wraparound case which concerns on other modification such as 1st Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "right". "Upper" is indicated, and "D" is "lower". In addition, although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[First Embodiment: Outline of Wrap Around Case]
The wraparound case 1 as an example of the packaging box according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a wraparound case 1. FIG. 2 is a plan view showing a blank 1A of the wraparound case 1.

As shown in FIG. 1, the wraparound case 1 is formed in a substantially rectangular parallelepiped shape that is long in the left-right direction. The wraparound case 1 is a box that is wrapped so as to wrap the contents (not shown) and sealed by closing the left and right end faces.

The wraparound case 1 is formed by assembling the blank 1A shown in FIG. The blank 1A is formed by punching, for example, a sheet of paper corrugated cardboard with a die cutter or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 4) are bonded to the front and back surfaces of a wavy corrugated cardboard 9A. Note that FIG. 2 shows the front liner 9B side (outside of the wraparound case 1). In the present specification, the direction parallel to the corrugated cardboard sheet 9A is referred to as the "step direction", and the direction orthogonal to the step direction is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

[blank]
As shown in FIG. 2, the blank 1A includes a bottom wall 10, a top wall 11, a first side wall 12, a second side wall 13, an opening portion 14, a pair of first inner flaps 15, and a pair of first side walls. The two inner flaps 16, the pair of first outer flaps 17, and the pair of second outer flaps 18 are included.

The opening portion 14, the top wall 11, the second side wall 13, the bottom wall 10, and the first side wall 12 are connected in this order in a line from one side to the other in the step direction. A first ruled line L1 is formed at the boundary between the walls and the like. The pair of first inner flaps 15 are connected to both ends of the first side wall 12 in the flow direction (axial direction) via a second ruled line L2. The pair of second inner flaps 16 are connected to both ends of the second side wall 13 in the flow direction via a second ruled line L2. The pair of first outer flaps 17 are connected to both ends of the bottom wall 10 in the flow direction via a second ruled line L2. The pair of second outer flaps 18 are connected to both ends of the top wall 11 in the flow direction via a second ruled line L2. The first and second ruled lines L1 and L2 are general-purpose ruled lines pushed in the thickness direction from the back liner 9C of the corrugated cardboard sheet, respectively.

The bottom wall 10 and the top wall 11 are formed in a substantially rectangular shape that is long in the flow direction and has the same dimensions as each other. A pair of first auxiliary ruled lines 20 and a pair of second auxiliary ruled lines 21 are formed on the top wall 11. The first auxiliary ruled line 20 is a general-purpose ruled line, and the second auxiliary ruled line 21 is a reverse ruled line pushed in the thickness direction from the front liner 9B of the corrugated cardboard sheet.

The pair of first auxiliary ruled lines 20 are formed in a state of extending linearly along the step direction. The pair of first auxiliary ruled lines 20 have the same length and are arranged substantially in parallel with each other. The pair of first auxiliary ruled lines 20 are formed between the vicinity of one end in the step direction and the vicinity of the other end of the top wall 11. When the pair of first auxiliary ruled lines 20 are inverted at the center line C extending in the step direction (width direction (front-back direction) orthogonal to the axial direction (left-right direction)) at the center of the flow direction (left-right direction) of the top wall 11. It is formed at a position shifted to one side (right side) of the flow direction so as to be asymmetric so as not to completely overlap. That is, the pair of first auxiliary ruled lines 20 are arranged so as to sandwich the center line C and to have different distances from the center line C.

The pair of second auxiliary ruled lines 21 are formed outside the flow direction of the pair of first auxiliary ruled lines 20. Further, the pair of second auxiliary ruled lines 21 are located on the other side in the step direction (the other side in the width direction (second side wall 13 side)) of the top wall 11, and are asymmetrical so as not to completely overlap when inverted at the center line C. It is formed in a shape (position) that becomes. The pair of second auxiliary ruled lines 21 are formed so as to extend obliquely from one side in the step direction toward the other side (from front to back) so as to approach the center line C. The second auxiliary ruled line 21 formed on one side (right side) of the flow direction is shorter than the second auxiliary ruled line 21 formed on the other side (left side) of the flow direction. The other end of the pair of second auxiliary ruled lines 21 in the step direction is formed at a position aligned with the other end of the pair of first auxiliary ruled lines 20 in the step direction.

The inclination angle of the pair of second auxiliary ruled lines 21 may be set freely, but it is preferable to set them based on the following criteria, for example. In the wraparound case 1 according to the first embodiment, a line in which the first auxiliary ruled line 20 is extended to the other (rear) in the step direction and a second auxiliary ruled line 21 adjacent to the first auxiliary ruled line 20 are extended to the other (rear) in the step direction. The inclination angle of the pair of second auxiliary ruled lines 21 is set so that the line extended to) intersects with the second side wall 13 on the first ruled line L1.

The first side wall 12 and the second side wall 13 are formed in a substantially rectangular shape that is long in the flow direction and has the same dimensions as each other. The stepwise dimensions of the first and second side walls 12 and 13 are set shorter than the stepwise dimensions of the bottom wall 10 and the like, and the flow direction dimensions of the first and second side walls 12 and 13 are the bottom wall 10 and the like. It is set to be almost the same as the dimension in the flow direction. A substantially trapezoidal notch 22 is formed in a recessed state at the other end of the first side wall 12 in the step direction and at the center in the flow direction.

The opening portion 14 is formed in a substantially rectangular shape elongated in the flow direction. The stepwise dimension of the opening portion 14 is set shorter than the stepwise dimension of the first side wall 12 and the like, and the flow direction dimension of the opening portion 14 is set to be substantially the same as the flow direction dimension of the bottom wall 10 and the like. There is. The opening portion 14 is connected to one end in the step direction of the top wall 11 (one end in the width direction on the side of the first side wall 12 in the sealed state) via the first ruled line L1. An opening line 23 is formed on the first ruled line L1 of the opening portion 14. The opening line 23 is a zipper in which a plurality of cuts forming a substantially L shape are arranged at predetermined intervals. The opening line 23 has a function of cutting the opening portion 14 from the other (left side) to one (right side) in the flow direction.

Each of the pair of first inner flaps 15 is formed in a substantially rectangular shape that is slightly long in the step direction. The stepwise dimension of each first inner flap 15 is set to be substantially the same as the stepwise dimension of the first side wall 12, and the flow direction dimension (extended dimension) of each first inner flap 15 is that of the first side wall 12. It is set slightly longer than half the dimension in the step direction.

The pair of second inner flaps 16 are each formed in a substantially rectangular shape having substantially the same dimensions as the first inner flap 15. A pair of cutting lines 30 are formed on the pair of second inner flaps 16. Each cutting line 30 is formed so as to substantially fan-like the vicinity of the other (lower) corner of the second inner flap 16 in the step direction. Specifically, each cutting line 30 is a first ruled line L1 between the bottom wall 10 and the second side wall 13 and a second ruled line L2 between the second side wall 13 and the second inner flap 16. It is formed in a substantially arc shape from the vicinity of the intersection to the outer end (tip) of the second inner flap 16 in the flow direction. The pair of cutting lines 30 are zippers and have a function of cutting the pair of second inner flaps 16 and dividing them into two in the step direction (vertical direction).

Each of the pair of first outer flaps 17 is formed in a substantially rectangular shape long in the step direction. To be precise, since the tip of each of the first outer flaps 17 in the flow direction is formed so as to project in a substantially trapezoidal shape, each of the first outer flaps 17 is formed in a substantially hexagonal shape. The stepwise dimension of each first outer flap 17 is set to be substantially the same as the stepwise dimension of the bottom wall 10, and the flow direction dimension (extended dimension) of each first outer flap 17 is the first inner flap 15 (extended dimension). The extension dimension of the second inner flap 16) is set to be substantially the same (to be exact, slightly shorter).

Each of the pair of second outer flaps 18 is formed in a substantially rectangular shape having substantially the same dimensions as the first outer flap 17.

[Seal of packaging box]
Next, the sealing process (assembly process) of the wraparound case 1 will be described.

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

In the packaging device, the first side wall 12 is bent at a substantially right angle along the first ruled line L1, and a plurality of accumulated contents are placed on the bottom wall 10. Subsequently, the packaging device attaches an adhesive to the upper outer surface of the first side wall 12. Next, the packaging device bends the second side wall 13, the top wall 11, and the opening portion 14 at substantially right angles along the first ruled line L1. Then, the opening portion 14 is adhered to the upper outer surface of the first side wall 12 via an adhesive. In this state, a peripheral wall 8 including a bottom wall 10 and a top wall 11 facing each other and a first side wall 12 and a second side wall 13 facing each other is formed (see FIG. 1). The peripheral wall 8 is formed in a substantially square cylinder shape with both end faces in the left-right direction (axial direction) open. Then, the contents placed on the bottom wall 10 are wrapped in the peripheral wall 8. As the adhesive, for example, a hot melt adhesive, a synthetic resin emulsion adhesive, a double-sided tape, or the like can be used.

The packaging device then bends the pair of first inner flaps 15 and the pair of second inner flaps 16 inward along the second ruled line L2. Further, the packaging device attaches the adhesive to the lower surface of each of the first inner flaps 15 and does not attach the adhesive to the upper surface of each of the first inner flaps 15. The packaging device attaches adhesives to two upper and lower positions sandwiching the cutting line 30 on the surface of each of the second inner flaps 16. In the present specification, the adhesive attached to the lower side of the first inner flap 15 and the second inner flap 16 is called the first adhesive portion G1, and the adhesive attached to the upper side of the second inner flap 16 is the first. 2 It will be called the adhesive portion G2.

Next, as shown in FIG. 1, the packaging device bends the pair of second outer flaps 18 inward (downward) along the second ruled line L2. Then, each of the second outer flaps 18 is adhered to the second inner flap 16 via the second adhesive portion G2 in a state of being folded upward between the first inner flap 15 and the second inner flap 16. That is, each of the second outer flaps 18 folds over the first inner flap 15 without being adhered to the upper side.

Subsequently, the packaging device bends the pair of first outer flaps 17 inward (upward) along the second ruled line L2. Then, each of the first outer flaps 17 is bonded via the first adhesive portion G1 in a state of being folded under the first inner flap 15 and the second inner flap 16. The tip of each of the first outer flaps 17 is adhered to the first inner flap 15 and the second inner flap 16 in a state of overlapping the outer tip of the second outer flap 18.

As a result, both the left and right end surfaces of the peripheral wall 8 are closed, and the wraparound case 1 is sealed. Each cutting line 30 is in a state of being formed on the second inner flap 16 so as to partition the first adhesive portion G1 and the second adhesive portion G2.

[Opening the wraparound case]
Next, the opening step (opening procedure) of the wraparound case 1 will be described with reference to FIGS. 1, 3 and 4. FIG. 3 is a perspective view showing the opening process of the wraparound case 1. FIG. 4 is a perspective view showing a state in which the wraparound case 1 is opened.

The wraparound case 1 is opened by lifting and opening the top wall 11 and the pair of second outer flaps 18.

As shown in FIG. 1, the user grasps the left end portion of the opening portion 14 and pulls it from the left side to the right side. Then, the opening portion 14 is cut along the opening line 23 while being peeled off from the first side wall 12. When the opening portion 14 is separated from the top wall 11 and removed, the front end portion of the top wall 11 is separated from the upper end portion of the first side wall 12. As described above, the opening wire 23 has a function of separating the front end portion (one end portion in the width direction) of the top wall 11 from the peripheral wall 8.

Next, as shown in FIG. 3, the user inserts a finger into the notch 22 of the first side wall 12 to grasp the front end portion of the top wall 11, and pulls up the gripped top wall 11 (white in FIG. 3). See the pull-out arrow). Then, the pair of second outer flaps 18 also start to be lifted together with the top wall 11. At this time, since each of the second outer flaps 18 is not adhered to the first inner flap 15, the user can start pulling up the tip portion of the top wall 11 or the like with a small force.

The top wall 11 begins to be mountain-folded by a pair of first auxiliary ruled lines 20 and valley-folded by a pair of second auxiliary ruled lines 21 as it is pulled up. Further, since the pair of first auxiliary ruled lines 20 are formed to the right of the center line C, the second outer flap 18 on the right side starts to lift before the second outer flap 18 on the left side (broken line in FIG. 3). See arrow). As a result, first, the second inner flap 16 adhered to the second outer flap 18 on the right side begins to be cut along the cutting line 30. After the start of cutting the second inner flap 16 on the right side, the second inner flap 16 adhered to the second outer flap 18 on the left side starts to be cut along the cutting line 30. As the top wall 11 and the like are pulled up, the upper side of the second inner flap 16 adhered to the second outer flap 18 is separated from the lower side of each second inner flap 16 adhered to the first outer flap 17 ( (See FIG. 4).

As shown in FIG. 4, the user cuts each of the second inner flaps 16 along the cutting line 30 to divide them into two, and then rotates the top wall 11 and the like backward. At this time, the top wall 11, the pair of second outer flaps 18, and the second side wall 13 are integrally rotated rearward about the first ruled line L1 between the bottom wall 10 and the second side wall 13. ..

As a result, the upper surface, the left and right end surfaces, and the rear surface of the wraparound case 1 are opened, and the wraparound case 1 is opened. In this way, since the substantially upper half of the wraparound case 1 is opened, the user can easily take out the contents. Further, when all the contents are left without being taken out, the wraparound case 1 is simply resealed by rotating the top wall 11, the pair of second outer flaps 18 and the second side wall 13 forward. Can be done.

In the wraparound case 1 according to the first embodiment described above, the top wall 11 is folded by a pair of first auxiliary ruled lines 20 in the process of pulling up the top wall 11 separated by the opening line 23, so that the right side is formed. After the second inner flap 16 (one in the axial direction) starts to be cut at the cutting line 30, the second inner flap 16 on the left side (the other in the axial direction) starts to be cut at the cutting line 30. According to this configuration, the timing of cutting the second inner flap 16 on the right side and the second inner flap 16 on the left side can be staggered. Therefore, as compared with the case where the pair of second inner flaps 16 are cut at substantially the same time, The force required to cut the pair of second inner flaps 16 can be reduced. As a result, the wraparound case 1 can be easily opened with a small force.

Further, in the wraparound case 1 according to the first embodiment, in the process of pulling up the top wall 11 while folding the top wall 11 with a pair of first auxiliary ruled lines 20, the top wall 11 is valley-folded with a pair of second auxiliary ruled lines 21. The configuration was set. According to this configuration, the force for lifting the top wall 11 can be appropriately transmitted to the second inner flap 16 by bending the top wall 11 at the first auxiliary ruled line 20 and the second auxiliary ruled line 21 in opposite directions. can. Thereby, the opening work of the wraparound case 1 can be performed more easily.

Further, according to the wraparound case 1 according to the first embodiment, since the second outer flap 18 is not adhered to the first inner flap 15, the top wall 11 and the pair of second outer flaps 18 connected to the top wall 11 are not adhered to the first inner flap 15. And can be lifted with a small force.

Further, according to the wraparound case 1 according to the first embodiment, the tip portion of the first outer flap 17 overlaps the outer tip portion of the second outer flap 18 and is adhered to the first inner flap 15. No second outer flap 18 can be held down. As a result, it is possible to prevent the second outer flap 18 which is not adhered to the first inner flap 15 from rising, and the sealed state of the wraparound case 1 can be appropriately maintained.

[Modified example of the first embodiment]
In the wraparound case 1 according to the first embodiment, each cutting line 30 is formed so as to partition the vicinity of the lower corner portion of the second inner flap 16 in a substantially fan shape, but the present invention is not limited thereto. .. As shown in FIG. 5, for example, as the wraparound case 1 (blank 1A) according to the modified example of the first embodiment, each cutting line 30 divides the vicinity of the upper corner portion of the second inner flap 16 into a substantially fan shape. It may be formed as follows. Specifically, each cutting line 30 is a first ruled line L1 between the top wall 11 and the second side wall 13, and a second ruled line L2 between the second side wall 13 and the second inner flap 16. It may be formed in a substantially arc shape from the vicinity of the intersection to the outer end (tip) of the second inner flap 16 in the flow direction. When the wraparound case 1 according to this modification is opened, the top wall 11 and the pair of second outer flaps 18 are integrally centered on the first ruled line L1 between the top wall 11 and the second side wall 13. Rotates backwards.

[Second Embodiment]
Next, the wraparound case 2 according to the second embodiment will be described with reference to FIG. FIG. 6 is a perspective view showing the wraparound case 2. In the description of other embodiments and modifications described below, the same or corresponding configurations as those of the wraparound case 1 according to the first embodiment are designated by the same reference numerals, and the same or corresponding to the wraparound case 1. The description to be made is omitted.

In the wraparound case 2 according to the second embodiment, a pair of cutting lines 31 are formed on the first outer flap 17 so as to partition the first adhesive portion G1 provided on the second inner flap 16, respectively. In that respect, it differs from the wraparound case 1 according to the first embodiment. Each cutting line 31 is formed so as to partition the vicinity of the rear corner portion of the first outer flap 17 in a substantially fan shape. Specifically, each cutting line 31 is formed in a substantially arc shape between the rear lower corner portion of the wraparound case 2 and the tip of the first outer flap 17. The pair of cutting lines 31 have a function of cutting the pair of first outer flaps 17 and dividing them into two in the front-rear direction (width direction).

When the wraparound case 2 according to the second embodiment described above is opened, the top wall 11 is folded by a pair of first auxiliary ruled lines 20 in the process of pulling up the top wall 11 separated by the opening portion 14. After the first outer flap 17 on the right side (one in the axial direction) starts to be cut at the cutting line 31, the first outer flap 17 on the left side (the other in the axial direction) starts to be cut at the cutting line 31. Further, the cut portion (the portion bonded by the first adhesive portion G1) of the top wall 11, the pair of second outer flaps 18, the second side wall 13 and the pair of first outer flaps 17 is integrally bottomed. It rotates backward about the first ruled line L1 between the wall 10 and the second side wall 13. According to this configuration, substantially the same actions and effects as those of the wraparound case 1 according to the first embodiment can be obtained.

[Third Embodiment]
Next, the wraparound case 3 according to the third embodiment will be described with reference to FIG. 7. FIG. 7 is a perspective view showing the wraparound case 3.

In the wraparound case 3 according to the third embodiment, a pair of cutting lines 32 are formed on the second outer flap 18 so as to partition the second adhesive portion G2 provided on the second inner flap 16, respectively. In that respect, it differs from the wraparound case 1 according to the first embodiment. Each cutting line 32 is formed so as to partition the vicinity of the rear corner portion of the second outer flap 18 in a substantially fan shape. Specifically, each cutting line 32 is formed in a substantially arc shape between the rear upper corner of the wraparound case 2 and the tip of the second outer flap 18. The pair of cutting lines 32 have a function of cutting the pair of second outer flaps 18 and dividing them into two in the front-rear direction (width direction).

When the wraparound case 3 according to the third embodiment described above is opened, the top wall 11 is folded by a pair of first auxiliary ruled lines 20 in the process of pulling up the top wall 11 separated by the opening portion 14. After the second outer flap 18 on the right side starts to be cut at the cutting line 32, the second outer flap 18 on the left side starts to be cut at the cutting line 32. Further, the top wall 11 and the pair of second outer flaps 18 are integrally rotated rearward about the first ruled line L1 between the top wall 11 and the second side wall 13. According to this configuration, substantially the same actions and effects as those of the wraparound case 1 according to the first embodiment can be obtained.

[Fourth Embodiment]
Next, the wraparound case 4 (blank 4A) according to the fourth embodiment will be described with reference to FIG. FIG. 8 is a plan view showing the blank 4A of the wraparound case 4.

The wraparound case 4 (blank 4A) according to the fourth embodiment is different from the wraparound case 1 according to the first embodiment in that a pair of cutting lines 30 are omitted. The wraparound case 4 is opened by releasing the adhesion between the second inner flap 16 and the second outer flap 18. That is, when the wraparound case 3 is opened, the top wall 11 is mountain-folded by a pair of first auxiliary ruled lines 20 in the process of pulling up the top wall 11 separated by the opening portion 14, so that the right side (one in the axial direction) is opened. ), The second outer flap 18 on the left side (the other in the axial direction) begins to peel off from the second adhesive portion G2 (see FIG. 3 and the like). Further, the top wall 11 and the pair of second outer flaps 18 are integrally rotated rearward about the first ruled line L1 between the top wall 11 and the second side wall 13. According to this configuration, substantially the same actions and effects as those of the wraparound case 1 according to the first embodiment can be obtained.

In the wraparound cases 1 to 4 (including modified examples; the same applies hereinafter) according to the first to fourth embodiments, a pair of first auxiliary ruled lines 20 are formed to the right of the center line C. Not limited to this, it may be formed to the left from the center line C. In this case, after the cutting lines 30 to 32 on the left side start to be cut (after the second adhesive portion G2 on the left side starts to peel off), the cutting lines 30 to 32 on the right side start to be cut (second adhesive portion G2 on the right side). Begins to peel off). Further, the pair of first auxiliary ruled lines 20 is not limited to be asymmetrical with the center line C in between, and for example, the pair of first auxiliary ruled lines 20 may be located on the left side or the right side of the center line C.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, the pair of first auxiliary ruled lines 20 extend in the front-rear direction (step direction) so as to be substantially parallel to each other. Not limited to. As shown in FIG. 9, for example, the pair of first auxiliary ruled lines 20 may extend obliquely from the front to the rear so as to be separated from each other from the center line C. Further, the first auxiliary ruled line 20 is not limited to the general-purpose ruled line, and may be any line as long as it is a line for folding the top wall 11 in a mountain fold.

Further, in the wraparound cases 1 to 3 according to the first to third embodiments, the cutting lines 30 to 32 are zippers extending in an arc shape, but the present invention is not limited to this. For example, the cutting lines 30 to 32 may be formed in a straight line. Further, the cutting lines 30 to 32 are not limited to zippers, and may be any line formed for cutting a corrugated cardboard sheet, such as a sewing machine line in which a plurality of linear cuts are arranged at predetermined intervals.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, the second outer flap 18 is not adhered to the first inner flap 15 in order to facilitate opening, but the present invention. Is not limited to this. The second outer flap 18 may be bonded to at least the second inner flap 16 via the second adhesive portion G2 in a state of being folded on the upper side of the first inner flap 15 and the second inner flap 16. For example, the second outer flap 18 may be adhered to the first inner flap 15 and the second inner flap 16 via the second adhesive portion G2. Even in this case, in order to facilitate opening, for example, the second adhesive portion G2 attached to the first inner flap 15 is made smaller (smaller) than the second adhesive portion G2 attached to the second inner flap 16. Is preferable.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, the opening portion 14 (opening line 23) is configured to be cut from the left side to the right side, but the present invention is not limited to this, and the opening portion 14 (opening line 23) is cut from the right side. It may be configured to be cut to the left. Further, as shown in FIG. 10, the opening portion 19 is connected to the top wall 11 via the first ruled line L1, and a pair of vertical opening lines 25 and a pair of horizontal opening lines 26 are formed in the opening portion 19. You may. The pair of vertical opening lines 25 are zippers that are arranged apart from each other in the left-right direction (flow direction) and extend diagonally from the lower end to the upper end of the opening portion 19 so as to be separated from each other. The pair of horizontal opening lines 26 are zippers extending from the upper ends of the pair of vertical opening lines 25 to both sides in the left-right direction along the first ruled line L1. In this case, the notch portion 24 of the first side wall 12 is formed to a depth slightly shorter than the height of the opening portion 19. The adhesive is not adhered to the position corresponding to the notch portion 24. The opening portion 19 is cut along a pair of vertical opening lines 25 and a pair of horizontal opening lines 26 except for the left and right sides, and separates the front end portion of the top wall 11 from the peripheral wall 8. Further, the opening wire 23, the vertical opening wire 25, and the horizontal opening wire 26 are not limited to zippers, and may be any wire formed for cutting a corrugated cardboard sheet such as a sewing machine wire.

Further, in the wraparound cases 1 to 4 (including a modified example; the same applies hereinafter) according to the first to fourth embodiments, the opening portions 14 and 19 are adhered to the outer surface of the first side wall 12. However, it may be adhered to the inner surface of the first side wall 12. Further, the opening lines 23 and 26 are formed at the boundary between the top wall 11 and the opening portions 14 and 19, but the present invention is not limited to this. For example, the opening portions 14 and 19 may be omitted, and the opening lines 23 and 26 may be formed at the boundary between the top wall 11 and the first side wall 12. In this case, for example, a joint piece (not shown) may be connected to the bottom wall 10 and adhered to the outer surface or the inner surface of the first side wall 12 to form the peripheral wall 8 instead of the opening portions 14 and 19. .. Further, the opening lines 23 and 26 are formed at the boundary between the top wall 11 and the opening portions 14, 19 and the like, but the present invention is not limited to this, and may be formed at a position shifted to the top wall 11 side. It may be formed at a position shifted to the opening portions 14, 19 (or the first side wall 12) side. That is, the opening lines 23 and 26 may be formed in front of the peripheral wall 8 (one in the width direction) substantially parallel to the corner sides of the peripheral wall 8. Further, the opening wire 23 and the like are composed of one zipper, but the present invention is not limited to this, and may be composed of two parallel zippers and the like.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, a pair of second auxiliary ruled lines 21 are formed on the top wall 11, but the present invention is not limited to this, and the pair of second auxiliary ruled lines 21 is not limited to this. It may be omitted. Further, each second auxiliary ruled line 21 is formed by one reverse ruled line, but the present invention is not limited to this, and may be composed of two reverse ruled lines arranged in parallel at narrow intervals (shown in the figure). figure). Further, the second auxiliary ruled line 21 is not limited to the reverse ruled line, and may be any line as long as it is a line for valley folding the top wall 11.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, the tip of the first outer flap 17 overlaps with the tip of the second outer flap 18, but the present invention is limited to this. Not done. For example, the first outer flap 17 and the second outer flap 18 may be formed so as to abut the tip portions thereof, or may be formed so as to separate the tip portions thereof.

Further, in the wraparound cases 1 to 4 according to the first to fourth embodiments, the peripheral wall 8 has a substantially quadrangular cross section, but the present invention is not limited to this. For example, a chamfered wall (not shown) is connected between the opening portion 14 and the top wall 11 or between the top wall 11 and the second side wall 13 to form a peripheral wall (not shown) having a substantially hexagonal cross section. It may be formed. In addition, a chamfered wall (not shown) may be connected between the bottom wall 10 and the side walls 12 and 13 to form a peripheral wall (not shown) having a substantially hexagonal cross section. Four chamfered walls may be provided to form a peripheral wall (not shown) having a substantially octagonal cross section. Further, the shapes and sizes of the walls and the like described above are merely examples, and can be changed according to the shape and size of the contents.

Further, the wraparound cases 1 to 4 according to the first to fourth embodiments were opened with the top wall 11 facing upward, but the present invention is not limited to this, and the wraparound cases 1 to 4 are not limited to this, and the top wall 11 is facing sideways. It may be opened with. Further, in the first to fourth embodiments, the case where the present invention is applied to the wraparound cases 1 to 4 as an example of the packaging box has been described, but the present invention is not limited to this, for example, the present invention is applied to a so-called A type packaging box. May be applied to open the side wall.

Further, the wraparound cases 1 to 4 according to the first to fourth embodiments are formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited thereto. For example, the corrugated cardboard sheet may be a single-sided corrugated cardboard sheet in which a liner is attached to one side of the inner shin 9A, or a double-sided corrugated cardboard sheet in which a single-sided corrugated cardboard sheet is attached to a double-sided corrugated cardboard sheet. Further, for example, the wraparound cases 1 to 4 may be formed of thick paper, a resin plate, or the like instead of the corrugated cardboard sheet made of paper.

The description of the 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.

1-4 Wrap-around case (packaging box)
8 Peripheral wall 10 Bottom wall 11 Top wall 12 1st side wall 13 2nd side wall 15 1st inner flap 16 2nd inner flap 17 1st outer flap 18 2nd outer flap 20 1st auxiliary ruled line 21 2nd auxiliary ruled line 23,26 opened Line 30-32 Cutting line C Center line G1 1st adhesive part G2 2nd adhesive part

Claims (6)

A packaging box (1) for packaging the contents.
The bottom wall (10) forming the bottom surface of the peripheral wall (8) formed in a cylindrical shape with both end faces in the axial direction open, and the bottom wall (10).
A top wall (11) that faces the bottom wall and forms a top surface of the peripheral wall.
A first side wall (12) forming one side surface in the width direction orthogonal to the axial direction of the peripheral wall on a plane, and
A second side wall (13) that faces the first side wall and forms the other side surface in the width direction of the peripheral wall.
A pair of first inner flaps (15) connected to both ends in the axial direction of the first side wall, and
A pair of second inner flaps (16) connected to both ends in the axial direction of the second side wall, and
A pair of first outer flaps (17) connected to both ends in the axial direction of the bottom wall,
A pair of second outer flaps (18) connected to both ends in the axial direction of the top wall, and
A pair of first auxiliarys formed at positions shifted to one axial direction so as to be asymmetrical so as not to completely overlap when inverted at the center line (C) extending in the width direction at the center of the top wall in the axial direction. Ruled line (20) and
An opening line (23, 26) formed on one side of the peripheral wall on the first side wall side and separating the top wall from the peripheral wall.
A pair of cutting lines (30) formed on the pair of second inner flaps, which cut the pair of second inner flaps and divide the second inner flaps into two in the vertical direction, are provided.
After the pair of first inner flaps and the pair of second inner flaps are bent so as to close both axially end faces of the peripheral wall, the pair of first outer flaps and the pair of second outer flaps are said to be paired. Bent so as to overlap the first inner flap and the pair of second inner flaps.
The first outer flap is bonded via the first adhesive portion (G1) in a state of being folded under the first inner flap and the second inner flap.
The second outer flap is bonded to at least the second inner flap via a second adhesive portion (G2) in a state of being folded on the upper side of the first inner flap and the second inner flap.
The cutting line is formed on the second inner flap so as to partition the first adhesive portion and the second adhesive portion.
In the process of pulling up the top wall separated by the opening line, the top wall is mountain-folded by the pair of first auxiliary ruled lines, so that the second inner flap in one axial direction is cut by the cutting line. A packaging box, characterized in that after the start, the other axially opposite inner flap begins to be cut at the cutting line. It is a packaging box (2, 3) that wraps the contents.
The bottom wall (10) forming the bottom surface of the peripheral wall (8) formed in a cylindrical shape with both end faces in the axial direction open, and the bottom wall (10).
A top wall (11) that faces the bottom wall and forms a top surface of the peripheral wall.
A first side wall (12) forming one side surface in the width direction orthogonal to the axial direction of the peripheral wall on a plane, and
A second side wall (13) that faces the first side wall and forms the other side surface in the width direction of the peripheral wall.
A pair of first inner flaps (15) connected to both ends in the axial direction of the first side wall, and
A pair of second inner flaps (16) connected to both ends in the axial direction of the second side wall, and
A pair of first outer flaps (17) connected to both ends in the axial direction of the bottom wall,
A pair of second outer flaps (18) connected to both ends in the axial direction of the top wall, and
A pair of first auxiliarys formed at positions shifted to one axial direction so as to be asymmetrical so as not to completely overlap when inverted at the center line (C) extending in the width direction at the center of the top wall in the axial direction. Ruled line (20) and
An opening line (23, 26) formed on one side of the peripheral wall on the first side wall side and separating the top wall from the peripheral wall.
A pair formed on the other side in the width direction by the pair of first outer flaps or the pair of second outer flaps, and the pair of first outer flaps or the pair of second outer flaps are cut and divided into two in the width direction. With cutting lines (31, 32),
After the pair of first inner flaps and the pair of second inner flaps are bent so as to close both axially end faces of the peripheral wall, the pair of first outer flaps and the pair of second outer flaps are said to be paired. Bent so as to overlap the first inner flap and the pair of second inner flaps.
The first outer flap is bonded via the first adhesive portion (G1) in a state of being folded under the first inner flap and the second inner flap.
The second outer flap is bonded to at least the second inner flap via a second adhesive portion (G2) in a state of being folded on the upper side of the first inner flap and the second inner flap.
The cutting line is formed on the first outer flap or the second outer flap so as to partition one of the first adhesive portion and the second adhesive portion provided on the second inner flap. ,
In the process of pulling up the top wall separated by the opening line, the top wall is mountain-folded by the pair of first auxiliary ruled lines, so that the first outer flap in one axial direction or the first outer flap in one axial direction is used. 2. A packaging box characterized in that after the outer flap begins to be cut at the cutting line, the axially other first outer flap or the axially other second outer flap begins to be cut at the cutting line. A packaging box (4) for packaging the contents.
The bottom wall (10) forming the bottom surface of the peripheral wall (8) formed in a cylindrical shape with both end faces in the axial direction open, and the bottom wall (10).
A top wall (11) that faces the bottom wall and forms a top surface of the peripheral wall.
A first side wall (12) forming one side surface in the width direction orthogonal to the axial direction of the peripheral wall on a plane, and
A second side wall (13) that faces the first side wall and forms the other side surface in the width direction of the peripheral wall.
A pair of first inner flaps (15) connected to both ends in the axial direction of the first side wall, and
A pair of second inner flaps (16) connected to both ends in the axial direction of the second side wall, and
A pair of first outer flaps (17) connected to both ends in the axial direction of the bottom wall,
A pair of second outer flaps (18) connected to both ends in the axial direction of the top wall, and
A pair of first auxiliarys formed at positions shifted to one axial direction so as to be asymmetrical so as not to completely overlap when inverted at the center line (C) extending in the width direction at the center of the top wall in the axial direction. Ruled line (20) and
It is provided with an opening line (23, 26) formed on one side of the peripheral wall on the first side wall side in the width direction and separating the top wall from the peripheral wall.
After the pair of first inner flaps and the pair of second inner flaps are bent so as to close both axially end faces of the peripheral wall, the pair of first outer flaps and the pair of second outer flaps are said to be paired. Bent so as to overlap the first inner flap and the pair of second inner flaps.
The first outer flap is bonded via the first adhesive portion (G1) in a state of being folded under the first inner flap and the second inner flap.
The second outer flap is bonded to at least the second inner flap via a second adhesive portion (G2) in a state of being folded on the upper side of the first inner flap and the second inner flap.
In the process of pulling up the top wall separated by the opening line, the top wall is mountain-folded by the pair of first auxiliary ruled lines, so that the second outer flap in one axial direction is separated from the second adhesive portion. A packaging box characterized in that after the peeling begins, the second outer flap on the other side in the axial direction begins to peel from the second adhesive portion. It is located on the other side of the top wall in the width direction, is formed so as to be asymmetrical so that it does not completely overlap when inverted at the center line, and is oblique so as to approach the center line from one side in the width direction toward the other. Further provided with a pair of second auxiliary ruled lines (21) extending to
Any one of claims 1 to 3, wherein in the process of pulling up the top wall while folding the top wall with the pair of first auxiliary ruled lines, the top wall is valley-folded with the pair of second auxiliary ruled lines. The packaging box described in. The packaging box according to any one of claims 1 to 4, wherein the second outer flap is folded without being adhered to the upper side of the first inner flap. The fifth aspect of claim 5, wherein the tip end portion of the first outer flap is adhered to the first inner flap and the second inner flap in a state of being overlapped with the outer tip portion of the second outer flap. Packaging box.

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