JP6595367B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box that accommodates a container that is elastically deformed up and down.

The packaging box in which the container is accommodated may be loaded during storage or transportation. A vertical compressive load acts on the packaging box at this time depending on the weight of other packaging boxes or containers stacked above. For this reason, the packaging box and the container may be damaged by the compressive load.
Therefore, in order to improve durability against compressive loads, packaging boxes with improved strength have been developed.

For example, there has been proposed a packaging box in which the strength of the body portion is improved by bending the ruled lines facing the top and bottom in the cylindrical body portion. According to this packaging box, it is said that the deformation | transformation with respect to a compressive load is suppressed (refer patent document 1).
In addition, a container having a cushion part that elastically deforms up and down has been proposed. According to this container, it is supposed that the load of an up-down direction can be absorbed (refer patent document 2).

JP 2007-39090 JP 2014-108812 JP

By the way, when a container that absorbs a load in the vertical direction by elastically deforming as described above is housed in a packaging box, a part of the compressive load due to the weight of the other packaging box or container loaded above the container Can be carried. If a compressive load is assigned to each of the packaging box and the container, durability against the compressive load can be improved.
However, when a container that elastically deforms and absorbs the compressive load is accommodated in the packaging box in which the deformation with respect to the compressive load is suppressed as described above, since the deformation of the packaging box is suppressed, the container is sufficiently There is a possibility that the container cannot be elastically deformed and a sufficient compressive load cannot be applied to the container. Therefore, the packaging box in which the deformation is suppressed is not allowed to be deformed for sharing the compressive load on the container, and may be damaged.

  The packaging box of the present case has been developed in view of the above problems, and one of the purposes is to suppress breakage. Note that the present invention is not limited to this purpose, and is an operation and effect derived from each configuration shown in “Mode for Carrying Out the Invention” to be described later. It can be positioned as another purpose.

(1) The packaging box disclosed here accommodates a container having a cushion portion that is elastically deformed up and down, and has a cylindrical body portion that is erected upward from the bottom portion.
The packaging box has a first ruled line that forms the bottom of the barrel part, and is folded when a vertical compressive load is applied to the container to share the compressive load above the first ruled line in the trunk part. And a second ruled line arranged side by side.

(2) It is preferable that the second ruled line is formed in an upwardly convex arc shape.
(3) It is preferable to include a third ruled line that forms the vertical side of the body portion. In this case, it is preferable that the second ruled line is provided with an interval from the third ruled line.
(4) It is preferable that the edge part of said 2nd ruled line and said 1st ruled line are spaced apart up and down by the distance substantially equal to the thickness dimension of the said bottom part. That is, it is preferable that a separation dimension between the end of the second ruled line and the first ruled line is set according to the thickness dimension of the bottom part.
(5) In addition, it is preferable that the said trunk | drum has a cutting part by which at least one part was cut | disconnected.

  According to the packaging box of the present case, when a compressive load is applied, the packaging box can be prevented from being damaged by allowing the deformation of the packaging box by the second ruled line. At this time, the compressive load is absorbed by the container that is elastically deformed up and down. Therefore, the compressive load can be shared by the packaging box and the container, and the durability against the compressive load can be improved.

It is a perspective view which shows the packaging box and the container accommodated in this packaging box. It is a top view which shows the sheet | seat material of the state which expand | deployed the packaging box. It is an enlarged view of the principal part (area | region A) of FIG. It is a graph which shows the deformation | transformation characteristic of a packaging box. It is a figure which shows typically the principal part cross section of a packaging box, and shows the thing of the state where the displacement of a packaging box is large in order of (A) and (B).

  A packaging box as an embodiment will be described with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit thereof. Further, they can be selected as necessary, or can be appropriately combined.

The packaging box of this embodiment is a three-dimensional packaging material assembled from a sheet material cut into a predetermined shape and provided with ruled lines and slits. As the sheet material assembled in the packaging box, corrugated cardboard or cardboard is used.
In the present embodiment, the direction of gravity action is the downward direction, and the downward opposite direction is the upward direction. The packaging box and the sheet material assembled to the packaging box are placed on a horizontal plane.

[I. One Embodiment]
[1. Packaging box and container]
As shown in FIG. 1, a container 90 is accommodated in the packaging box 100.
Here, the packaging box 100 which forms a rectangular parallelepiped accommodation space is illustrated. The container 90 accommodates six bottles arranged in three rows in the long side direction in two rows in the short side direction of the packaging box 100. Each of the containers 90 is configured similarly.
Hereinafter, the container 90 and the packaging box 100 will be described in this order.

The container 90 is a bottle filled with a liquid such as a beverage such as water or juice, or a liquid seasoning such as soy sauce or miso. As the container 90, a bottle made of polyethylene terephthalate resin (so-called “pet bottle”) can be used. In addition, a bottle formed of a thermoplastic resin such as polyethylene or polypropylene may be used.
The container 90 is provided with a cushion portion 91 that is elastically deformed in the vertical direction in order to absorb the compressive load in the vertical direction.

The cushion portion 91 is formed as a constriction or a rib on the body portion of the container 90. Here, a plurality of concave grooves 91 a, 91 b, 91 c are provided as cushion portions 91 over the entire circumference of the body portion.
When the compressive load in the vertical direction acts on the container 90, the cushion portion 91 is elastically deformed and compressed vertically, and the height dimension of the container 90 is reduced. Therefore, the compressive load is absorbed by the container 90 that is elastically deformed by the cushion portion 91.

<Packing box>
Next, the packaging box 100 will be described.
The packaging box 100 is provided with a body portion 1 disposed on a side surface and a flap 30 disposed on each of an upper surface and a lower surface. The flaps 30 are continuously provided above and below the trunk portion 1.

The trunk 1 is erected upward from the bottom. The body portion 1 is provided with a pair of side wall portions 10 extending in the long side direction and a pair of end wall portions 20 extending in the short side direction when viewed from above. In the pair of side wall portions 10, the first side wall portion 11 and the second side wall portion 12 are arranged to face each other. In the pair of end wall portions 20, the first end wall portion 21 and the second end wall portion 22 are arranged to face each other.
The trunk portion 1 is provided with a cut portion at least partially cut. Here, the cut piece 7, the break assisting wire 8, and the handle portion 9 will be described as examples of the cut portion.
The notched piece 7 and the auxiliary breaking line 8 are provided to use the lower part of the packaging box 100 that is broken in the circumferential direction while leaving it in a tray shape. Here, the notch piece 7 is formed in each of the side wall parts 11 and 12, and the fracture | rupture auxiliary line 8 (it shows with a dashed-dotted line and a broken line) is formed over the perimeter of the trunk | drum 1. As shown in FIG.

The notch piece 7 is a part that becomes a clue when the packaging box 100 is broken. The notch piece 7 is formed by a cutting line that penetrates the sheet material in the thickness direction. Specifically, the two first notch cutting lines L _C1 extending horizontally and the second notch cutting line L _C2 extending up and down and connecting the central portions of the first notch cutting lines L _C1 are cut off. A piece 7 is formed.
The break assisting line 8 is provided at the same height as the cutout piece 7. As the breaking auxiliary line 8, auxiliary cutting lines such as a perforation in which cutting lines are intermittently formed, and a half cutting line in which a part in the thickness direction (for example, only the back liner) is cut are provided. For example, the break assisting line 8 is provided on a line obtained by extending each of the two first notch cutting lines L _C1 of the notch piece 7.

The handle portion 9 is provided to hold the packaging box 100. Here, a handle portion 9 for forming a trapezoidal hole is formed in each of the end wall portions 21 and 22. Specifically, the first handle cutting line L _H1 corresponding to the lower base of the trapezoid and two second cutting lines L _H2 extending upward while being slightly separated from each other and connecting the upper base and the lower base of the trapezoid. And the handle part 9 is formed by the perforation line L _H3 corresponding to the contour other than the bottom bottom of the trapezoid.

  The flap 30 is roughly divided into an outer flap 31 and an inner flap 36 according to the order of folding inward (accommodating space side). The inner flap 36 at the time of assembling the packaging box 100 is folded before the outer flap 31 and disposed inside the outer flap 31. The outer flap 31 is connected to the side walls 11 and 12 in the vertical direction, and the inner flap 36 is connected to the end wall portions 21 and 22 in the vertical direction.

More specifically, a first upper outer flap 32 is connected to the upper side of the first side wall portion 11 and a first lower outer flap 33 is connected to the lower side. Similarly, with respect to the second side wall portion 12, a second upper outer flap 34 is connected to the upper side, and a second lower outer flap 35 is connected to the lower side.
In addition, a first upper inner flap 37 is continuously connected to the first end wall portion 21, and a first lower inner flap 38 is continuously connected to the lower end wall portion 21. Similarly, with respect to the second end wall portion 22, a second upper inner flap 39 is connected to the upper side, and a second lower inner flap 40 is connected to the lower side.

<Sheet material>
Next, the sheet material 110 in which the packaging box 100 is developed will be described with reference to FIG. This sheet material 110 is provided with the above-described cutout piece 7, break assisting line 8, handle portion 9 and various ruled lines 50, 60, 70, 80 (shown by broken lines), and is a sheet cut into a predetermined shape. Packaging material. Here, a cardboard sheet is used as the sheet material 110.
In the description of the sheet material 110, the horizontal direction in the wall portions 10 and 20 is the X direction and the up and down direction in the wall portions 10 and 20 is the Y direction in a state where the packaging box 100 is assembled. Furthermore, the upper part of the walls 10 and 20 is the Y ₁ direction and the lower part is the Y ₂ direction, and one of the horizontal directions of the walls 10 and 20 (left side in FIG. 2) is the X ₁ direction and the other ( Figure 2, right) and the X ₂ direction.

In the center of the sheet material 110 in the Y direction, the above-described wall portions 10 and 20 are disposed. These wall portions 10 and 20 are arranged in the order of the first side wall portion 11, the second end wall portion 22, the second side wall portion 12, and the first end wall portion 21 from the X ₁ direction to the X ₂ direction. ing. Note that an adhesive margin piece 19 is continuously provided on the X ₁ direction side edge portion of the first side wall portion 11.
The Y-direction dimensions of these wall portions 10 and 20 are set to be approximately equal to or slightly larger than the height dimension of the container 90. Therefore, the top part of the container 90 accommodated in the packaging box 100 is abutted against the upper outer flaps 32, 34 or the upper inner flaps 37, 39 or accommodated with a slight gap.

The flap 30 described above is arranged on the Y direction end portion side of the sheet material 110. The flaps 30 are arranged on the Y ₁ direction side of the sheet material 110 from the X ₁ direction to the X ₂ direction, from the first upper outer flap 32, the second upper inner flap 39, the second upper outer flap 34, and the first upper inner The flaps 37 are arranged in the order. Further, in the Y ₂ direction side of the sheet material 110, toward the X ₁ direction to the X ₂ direction, the first lower outer flap 33, the second lower inner flap 40, second lower outer flap 35, first lower The side flaps 38 are arranged in order.

Various ruled lines 50, 60, 70, 80 are provided between the wall portions 10, 20 and the flap 30. The ruled lines 50, 60, 70, 80 are formed by pressing the sheet material 110 in the thickness direction. Here, ruled lines 50, 60, 70, and 80 are provided on the inner surface (the rear surface in FIG. 2) when the sheet material 110 is assembled in the packaging box 100.
The sheet material 110 is provided with a vertical ruled line (third ruled line) 50 along the Y direction and two types of ruled lines 60 and 70 provided parallel to each other along the X direction. Of the two types of ruled lines 60, 70, the one provided on the Y ₁ direction side is the upper ruled line 60, and the one provided on the Y ₂ direction side is the lower ruled line (first ruled line) 70. These ruled lines 50, 60, 70 are provided in a straight line. Further, the sheet material 110 is provided with auxiliary ruled lines (second ruled lines) 80 arranged side by side on the Y ₁ direction side of the lower ruled lines 70. The auxiliary ruled lines 80 are provided on the wall portions 10 and 20 (body portion 1).

The vertical ruled lines 50 form the vertical sides of the body 1 when the sheet material 110 is assembled. Here, the margin vertical line 59 toward the X ₁ direction to the X ₂ direction, the first longitudinal rule 51, the second vertical line 52, four vertical lines 50 arranged in the order of the third vertical lines 53 is provided. The glue margin vertical ruled line 59 is arranged between the glue margin piece 19 and the first side wall part 11, and the first vertical ruled line 51 is arranged between the first side wall part 11 and the second end wall part 22. . The second vertical ruled line 52 is arranged between the second end wall part 22 and the second side wall part 12, and the third ruled line 53 is arranged between the second side wall part 12 and the first end wall part 21. Be placed.

The upper ruled line 60 forms the top side of the body portion 1 when the sheet material 110 is assembled. Here, toward the X ₁ direction to the X ₂ direction, the first upper ruled line 61, the second upper ruled line 62, the third upper border 63, the four upper border 60 arranged in the order of the fourth upper ruled line 64 is collinear Is provided. The first upper ruled line 61 is arranged between the first side wall part 11 and the first upper outer flap 32, and the second upper ruled line 62 is arranged between the second end wall part 22 and the second upper inner flap 39. Be placed. The third upper ruled line 63 is disposed between the second side wall portion 12 and the second upper outer flap 34, and the fourth upper ruled line 64 is formed between the first end wall portion 21 and the second upper inner flap 37. Arranged between.

The lower ruled line 70 forms the bottom of the body 1 when the sheet material 110 is assembled. Here, toward the X ₁ direction to the X ₂ direction, the first bottom border 71, the second bottom border 72, a third bottom border 73, the four bottom border 70 arranged in the order of the fourth bottom border 74 is collinear Is provided. The first lower ruled line 71 is disposed between the first side wall part 11 and the first lower outer flap 33, and the second lower ruled line 72 is provided between the second end wall part 22 and the second lower inner flap 40. Placed in. The third lower ruled line 73 is disposed between the second side wall portion 12 and the second lower outer flap 35, and the fourth lower ruled line 74 is arranged between the first end wall portion 21 and the first lower inner flap 38. Between.

Auxiliary border 80 is provided in order to allow deformation while suppressing damage to the packaging box 100 the sheet material 110 is assembled, is arranged in the Y ₁ direction relative to the lower border 70 (in FIG. 1 above). Here, toward the X ₁ direction to the X ₂ direction, the first auxiliary border 81, the second auxiliary border 82, the third auxiliary border 83, four auxiliary border 80 arranged in the order of the fourth auxiliary border 84 is provided . The first auxiliary ruled line 81 is provided on the first side wall part 11 along with the first lower ruled line 71, and the second auxiliary ruled line 82 is provided on the second end wall part 22 along with the second lower ruled line 72. Further, the third auxiliary ruled line 83 is provided on the second side wall part 12 along with the third lower ruled line 73, and the fourth auxiliary ruled line 84 is provided on the first end wall part 21 along with the fourth lower ruled line 74. .
The first auxiliary ruled line 81 and the third auxiliary ruled line 83 are provided in the same shape, and the second auxiliary ruled line 82 and the fourth auxiliary ruled line 84 are provided in the same shape. Accordingly, the auxiliary ruled line 80 will be described by focusing on the first auxiliary ruled line 81 and the second auxiliary ruled line 82.

First, the first auxiliary ruled line 81 will be described with reference to FIG. 3. The first auxiliary ruled line 81 is provided in the vicinity of the first lower ruled line 71. The first auxiliary ruled line 81 is provided in a part of the X direction region of the first side wall portion 11. Therefore, the first auxiliary border 81 has one end portion 81a of the X ₁ direction is provided at a first distance S ₁ in the X direction with respect to the margin vertical lines 59, the other end portion 81b of the X ₂ direction A second interval S ₂ is provided in the X direction with respect to the first vertical ruled line 51.
Here, the first interval S ₁ and the second interval S ₂ are set equal. For example, as the first interval S ₁ or the second interval S ₂ , a dimension about half the width direction (long side direction) dimension W ₁ (see FIG. 1) of the container 90 described above is set. Furthermore, the X direction center of the first auxiliary ruled line 81 is provided so as to coincide with the center of the first side wall 11 in the X direction, and the first auxiliary ruled line 81 is provided in a shape symmetrical with respect to the X direction.

The first auxiliary ruled line 81 is formed in a circular arc shape that is convex in the Y ₁ direction (upward in FIG. 1). Here, if the first lower ruled line 71 is applied to the horizon and the first auxiliary ruled line 81 is applied to the sun, the outline of the sun immediately after sunrise corresponds to the first auxiliary ruled line 81.
Further, the first auxiliary ruled line 81 is juxtaposed upwardly with respect to the first lower ruled line 71. The distance between each end 81a, 81b of the first auxiliary ruled line 81 and the first lower ruled line 71 is set according to the thickness of the sheet material 110 (the bottom of the packaging box 100). Here, the end portions 81a and 81b of the first auxiliary ruled line 81 and the first lower ruled line 71 are provided in the Y direction (up and down in FIG. 1) by a distance substantially equal to the thickness of the sheet material 110. Therefore, the thicker the sheet material 110 is, the more the first auxiliary ruled line 81 is provided away from the first lower ruled line 71. However, the distance between the end portions 81a and 81b of the first auxiliary ruled line 81 and the lower ruled line 70 may be set slightly larger than the thickness of the sheet material 110 (for example, within twice the thickness).

Similarly, the second auxiliary ruled line 82 is formed in an arc shape convex in the Y direction, and is spaced from the first vertical ruled line 51 and the second vertical ruled line 52 by a predetermined interval S ₁ ′, S ₂ ′. Is provided. The distances S ₁ ′ and S ₂ ′ are set to a dimension that is approximately half the depth direction (short side direction) dimension W ₂ (see FIG. 1) of the container 90 described above. Further, the end portions 82 a and 82 b of the second auxiliary ruled line 82 are provided in the Y direction so as to be separated from the second lower ruled line 72 by a distance substantially equal to or slightly larger than the thickness of the sheet material 110.
However, the second auxiliary ruled line 82 is provided in a shape obtained by reducing the first auxiliary ruled line 81 in the X direction, or an arc shape of a circle having a radius smaller than the radius of a circle having an arc along the first auxiliary ruled line 81.

[2. Deformation of packaging box]
Next, the deformation of the packaging box 100 when a compressive load is applied will be described with reference to FIG.
In FIG. 4, the displacement of the packaging box 100 is defined on the horizontal axis, and the load is defined on the vertical axis.
The displacement means the amount of change in the downward position of the top of the packaging box 100 (here, the surfaces of the upper outer flaps 32 and 34). Therefore, the displacement can be said to be the amount of deformation compressed in the vertical direction with respect to the vertical dimension of the packaging box 100 when no load is applied (corresponding to the Y-direction dimension of the wall portions 10 and 20). Moreover, a load is a load which compresses the packaging box 100 (here the surface of the upper outer flaps 32 and 34) in the up-down direction measured according to a displacement. Here, the packaging box 100 is compressed and displaced at a constant speed, and the load for each displacement is recorded.

In FIG. 4, two load peaks P corresponding to the displacement appear. The second displacement D ₂ corresponding to the second peak P ₂ is larger than the first displacement D ₁ corresponding to the first peak P ₁ .
Up to the first peak P ₁ , the load increases as the displacement increases. Then, from the first peak P ₁ to the second peak P ₂ , the load decreases as the displacement increases, and the load increases after passing through the minimum value P ₃ . At the second peak P ₂ , the wall portions 10 and 20 of the packaging box 100 are bent. When the displacement further increases as shown by the broken line, the load decreases, and the packaging box 100 is greatly bent and damaged.

  On the other hand, as for the deformation characteristics of the conventional packaging box in which the auxiliary ruled line 80 is not formed, only one peak appears as shown by the alternate long and short dash line, and the allowable displacement is smaller than that of the present packaging box 100.

Furthermore, with reference to FIG. 5, the auxiliary | assistant ruled line 80 when the packaging box 100 is compressed up and down and the deformation | transformation of its periphery are illustrated.
When the load increases toward the first peak P ₁ , the state in which the walls 10 and 20 are along the vertical plane is maintained. At this time, the auxiliary ruled line 80 is positioned directly above the lower ruled line 70.
Then, when the load decreases as the displacement increases from the first peak P ₁ , the auxiliary ruled line 80 is formed so that the wall portions 10 and 20 are mountain-folded at the auxiliary ruled line 80 as shown in FIG. Displaces outward and downward. At this time, the wall portions 10 and 20 below the auxiliary ruled line 80 are deformed so as to bulge outward. Further, the wall portions 10 and 20 above the auxiliary ruled line 80 are deformed so as to be recessed inward.

At the minimum value P ₃ , the auxiliary ruled line 80 is positioned outside the lower ruled line 70 in the horizontal direction, as shown in FIG. That is, the auxiliary ruled line 80 is crushed up and down by the load.
Then, up to the second peak P ₂ , the walls 10 and 20 above the auxiliary ruled line 80 or the lower ruled line 70 are deformed so as to be further recessed inward. At the second peak P ₂ , the wall portions 10 and 20 above the auxiliary ruled line 80 are bent.

[3. Action and effect]
Since the packaging box 100 of the present embodiment is configured as described above, the following actions and effects can be obtained.
(1) Since the auxiliary ruled lines 80 arranged in parallel above the lower ruled line 70 are provided on the walls 10 and 20, when the vertical compressive load acts on the packaging box 100, the walls 10 and 20 assist. It is bent at the ruled line 80. In the conventional packaging box in which the auxiliary ruled line 80 is not provided, the wall portions 10 and 20 can be deformed outward and inward as compared with the case where the wall portion is deformed only to the outside or the inside. The horizontal displacement of 10, 20 is suppressed. In this way, by causing the region between the lower ruled line 70 and the upper auxiliary ruled line 80 to function as a deformation allowance, the horizontal ruled line 50 forming the vertical side of the body 1 can be suppressed from being displaced in the horizontal direction. Therefore, damage to the packaging box 100 can be suppressed by allowing deformation due to the vertical displacement of the packaging box 100.

By allowing the packaging box 100 to be deformed, the container 90 provided with the cushion portion 91 that is elastically deformed up and down can absorb the compressive load. Therefore, a compressive load can be assigned to each of the packaging box 100 and the container 90, and durability against the compressive load can be improved.
Furthermore, the appearance can be kept good by suppressing the occurrence of breakage due to compressive deformation of the packaging box 100. Further, the collapse of the packaging box 100 can be prevented.
In addition, since the auxiliary ruled lines 80 are provided in the vicinity of the lower ruled lines 70, the appearance of the packaging box 100 can be improved even when the auxiliary ruled lines 80 are crushed vertically and displaced outward in the horizontal direction when the compression load is applied. The above change is suppressed.

(2) Since the auxiliary ruled line 80 of the packaging box 100 is formed in an upwardly convex arc shape, stress concentration due to a compressive load can be suppressed. Therefore, damage to the packaging box 100 can be reliably suppressed.
(3) The compressive load acting on the auxiliary ruled line 80 provided at an interval with respect to the vertical ruled line 50 is not directly transmitted from the auxiliary ruled line 80 to the vertical ruled line 50. Therefore, damage to the packaging box 100 can be further reliably suppressed.

(4) The end portions 81a, 81b, 82a, and 82b of the auxiliary ruled line 80 and the lower ruled line 70 are provided apart in the Y direction (up and down) by a distance substantially equal to the thickness of the sheet material 110. For example, as the sheet material 110 becomes thicker, the auxiliary ruled line 80 is provided so as to be separated from the lower ruled line 70. Therefore, the auxiliary ruled lines 80 are hardly bent at the wall portions 10 and 20 of the packaging box 100 in which the lower outer flaps 33 and 35 and the lower inner flaps 38 and 40 are bent at the lower ruled lines 70. Thus, according to the thickness dimension of the sheet material 110, the distance between the ends 81a, 81b, 82a, 82b of the auxiliary ruled line 80 and the lower ruled line 70 is set, so that the auxiliary ruled line 80 functions reliably. Can do. Therefore, damage to the packaging box 100 can be suppressed.
In addition, when a compressive load is applied, the portion between the auxiliary ruled line 80 and the lower ruled line 70 can be smoothly deformed, which contributes to the prevention of damage to the packaging box 100.

  (5) In addition, a cut portion, such as the cutout portion 7, the auxiliary breaking line 8, and the handle portion 9 provided in the body portion 1 of the packaging box 100, is easily damaged by a compressive load. On the other hand, by deforming the packaging box 100 with the auxiliary ruled line 80 when a compressive load is applied, it is possible to improve the protection of the cut portion such as the cutout portion 7, the auxiliary breakage wire 8, the handle portion 9, or the vicinity thereof. it can. As a result, the appearance of the packaging box 100 can be maintained.

[II. Others]
Finally, other modifications of the present embodiment will be described.
For example, the auxiliary ruled lines 80 may be provided not only continuously but also intermittently. For example, you may use the auxiliary ruled line 80 of the shape which divided the circular arc-shaped curve convex in the Y direction into the Y direction edge part (vertex). Furthermore, an auxiliary ruled line 80 having a shape of an arcuate curve divided at a portion other than the end in the Y direction or an arcuate curve divided into three or more may be used. By providing the auxiliary ruled line 80 in such a shape, the displacement of the auxiliary ruled line 80 and the deformation of the packaging box 100 when a compressive load is applied can be smoothly changed.
Furthermore, the auxiliary ruled lines 80 having various shapes such as a straight line shape or a circular arc shape formed by a combination of straight lines can be used instead of the circular arc shape convex in the Y direction.

Further, among the auxiliary ruled lines 80, the second auxiliary ruled line 82 and the fourth auxiliary ruled line 84, or the first auxiliary ruled line 81 and the third lower ruled line 83 may be omitted. In this case, although the allowable deformation amount of the packaging box 100 can be reduced, the formation cost of the auxiliary ruled lines 82 and 84 can be suppressed.
In addition, a connection ruled line that connects each of the end portions 81a, 81b, 82a, and 82b of the auxiliary ruled line 80 and the lower ruled line 70 may be provided. For example, the connection ruled line is formed in a straight line shape along the Y direction. In this case, the dimension of the connection ruled line in the Y direction is set to be substantially equal to the thickness of the sheet material 110 (the bottom of the packaging box 100). However, the dimension of the connecting ruled line in the Y direction may be set slightly larger than the thickness of the sheet material 110 (for example, within twice the thickness).

By providing the connection ruled line in this way, the compressive load acting on the auxiliary ruled line 80 is transmitted to the bottom side formed by the lower ruled line 70 via the connection ruled line. Therefore, damage to the packaging box 100 can be suppressed.
The connection ruled line is not limited to a straight line, but may be various shapes such as a shape obtained by continuously extending the arc of the auxiliary ruled line 80, other curved lines, and wavy lines.

1 Body 7 Cutout (Cut)
8 Break auxiliary line (cutting part)
9 Handle part (cutting part)
10 Side wall portion 20 End wall portion 30 Flap 50 Vertical ruled line (third ruled line)
60 upper ruled line 70 lower ruled line (first ruled line)
80 Auxiliary ruled line (second ruled line)
81 First auxiliary ruled line 82 Second auxiliary ruled line 83 Third auxiliary ruled line 84 Fourth auxiliary ruled line 90 Container 91 Cushion part 100 Packaging box 110 Sheet material D ₁ first displacement D ₂ second displacement P ₁ first peak P ₂ second Peak P ₃ local minimum S ₁ , S ₁ ′ first interval S ₂ , S ₂ ′ second interval W ₁ width direction (long side direction) of container 90 W ₂ depth direction (short side direction) of container 90

Claims (5)

A container having a cushion part that elastically deforms up and down is accommodated, and a packaging box having a cylindrical body part that is erected upward from the bottom part,
A first ruled line that forms the bottom of the trunk,
And a second crease line arranged in parallel to the upper side of the first crease line in the trunk portion, which is bent when a vertical compressive load is applied and causes the container to share the compressive load. Packaging box. The packaging box according to claim 1, wherein the second ruled line is formed in an upwardly convex arc shape. Comprising a third ruled line that forms the vertical side of the body,
The packaging box according to claim 1, wherein the second ruled line is provided at an interval from the third ruled line. The end portion of the second ruled line and the first ruled line are provided to be vertically separated by a distance substantially equal to the thickness dimension of the bottom portion, according to any one of claims 1 to 3. Packaging box. The packaging body according to any one of claims 1 to 4, wherein the body portion has a cut portion at least partially cut.

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