JP6887787B2 - Cardboard packaging - Google Patents

Description

The present invention relates to the structure of a corrugated cardboard package, and specifically to a wrap-round type corrugated cardboard package.

Conventionally, a wrap-round type package that can simultaneously wrap an object to be packaged and make a box has been widely adopted.

In the conventional wraparound type corrugated cardboard package, in order to easily open the package, a break line is provided in the outer flap and the planned opening portion of the top plate, and the top plate is separated by cutting the break line to separate the packaged object. It can be easily taken out (see, for example, Patent Document 1). In addition, the empty package can be easily deployed in a prostrate state, so that it can be disposed of without being bulky.

Japanese Unexamined Patent Publication No. 9-207933

In the wraparound type corrugated cardboard package of Patent Document 1, in order to facilitate opening, a breaking line in which a plurality of linear slits are arranged is provided on the outer flap on the opening surface. However, when the opening operation is performed from the tip of the outer flap, the breakage of the corrugated cardboard package may not proceed along the break line due to the linear slit provided in the outer flap, and the corrugated cardboard may break freely in the middle. is there. In addition, the break line may be broken due to dropping or impact during transportation, and in such a case, the package may be distorted and the packaged object may be damaged. There are also problems.

The present invention has been made to solve the above-mentioned problems, and it is possible to avoid free breakage at the time of opening and break the corrugated cardboard package along the break line at the break line provided on the outer flap of the wraparound type corrugated cardboard package. At the same time, it is an object of the present invention to provide a corrugated cardboard package capable of suppressing the breakage line from being broken even when the package is impacted when dropped or the like.

In order to achieve the above object, the present invention is configured as follows.

The corrugated cardboard package provided according to one aspect of the present invention has a square tubular shape formed by a top plate, a bottom plate, and a pair of side plates connecting the top plate and the bottom plate, and both ends of the square tubular shape. In the opening surface, the square tubular both end opening surfaces are sealed by superimposing a pair of outer flaps extending from the top plate and the bottom plate on the pair of inner flaps extending from the side plates. In the wraparound type corrugated cardboard package, the outer flap has an extending direction in the MD direction of the corrugated cardboard package and a direction in which a hollow flows in a direction orthogonal to the MD direction, and each of the outer flaps has a direction in which a hollow flows. A plurality of first break lines extending from the central portion on the tip end side of the outer flap to both ends of the boundary line with the top plate or the bottom plate, and the first break line in the outer flap extending from the top plate. As described above, the first breaking line is provided with a second breaking line provided along the boundary line between the top plate and the side plate, and the first breaking line is a plurality of arcs in a posture in which the concave side faces the tip end side of the outer flap. The second break line is formed by arranging the slits, and the second breaking line is formed by arranging a plurality of slits.

According to the present invention, at the break line provided on the outer flap of the wraparound type corrugated cardboard package, free breakage at the time of opening can be avoided, the corrugated cardboard package can be broken along the break line, and the package body can be dropped. Even when the corrugated cardboard is impacted, it is possible to prevent the breaking line from being broken.

A development view of a corrugated cardboard package according to an embodiment of the present invention. Schematic perspective view of the corrugated cardboard package according to the embodiment of the present invention. The figure which shows the 1st break line of the corrugated cardboard package which concerns on embodiment of this invention. The figure which shows the breaking mode of the 1st breaking line in the corrugated cardboard package which concerns on embodiment of this invention. The figure which shows the breaking state of one breaking line (Comparative Example 1) formed by the conventional linear slit. The figure which shows the breaking state of another breaking line (Comparative Example 2) formed by the conventional linear slit.

The corrugated cardboard package according to the first aspect of the present invention has a square tubular shape formed by a top plate, a bottom plate, and a pair of side plates connecting the top plate and the bottom plate, and the open surfaces at both ends of the square tubular shape. In the above, the square tubular opening surfaces at both ends are sealed by superimposing a pair of outer flaps extending from the top plate and the bottom plate on the pair of inner flaps extending from the side plates. In the wraparound type corrugated cardboard package, the outer flap has a direction in which the hollow extends in the MD direction of the corrugated cardboard package and is orthogonal to the MD direction, and in each of the outer flaps, the hollow flows. A plurality of first break lines extending from the central portion on the tip end side of the outer flap to both ends of the boundary line with the top plate or the bottom plate, and the first break lines in the outer flap extending from the top plate so as to be continuous with each other. The first breaking line includes a second breaking line provided along the boundary line between the top plate and the side plate, and the first breaking line has a plurality of arc-shaped slits in a posture in which the concave side faces the tip end side of the outer flap. The second break line is formed by arranging a plurality of slits.

In the corrugated cardboard package of the second aspect of the present invention, in the first aspect, the plurality of arcuate slits of the first breaking line have a starting end at the time of breaking toward the central portion on the tip end side of the outer flap. , Things.

In the first or second aspect, the corrugated cardboard package of the third aspect of the present invention is spaced from the end of the first arcuate slit in the first arcuate slit and the second arcuate slit adjacent to each other. The start end of the second arc-shaped slit is arranged so as to overlap the first arc-shaped slit with respect to the end of the second arc-shaped slit in the direction in which the outer flap extends. Is.

In the corrugated cardboard package of the fourth aspect of the present invention, in any one of the first to third aspects, a plurality of the arc-shaped slits are linearly arranged at the first breaking line. is there.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 shows a development view of a corrugated cardboard package according to an embodiment of the present invention, and FIG. 2 shows an assembled state of the corrugated cardboard package according to the embodiment.

As shown in FIGS. 1 and 2, the corrugated cardboard package 30 of the present embodiment is a wrap-round type package that can simultaneously wrap the object to be packaged and perform box-making operations. As shown in FIG. 1, the corrugated cardboard package 30 includes a top plate 1, a side plate 3a, a bottom plate 2, a side plate 3b, and a sticking plate 3c in a state of being integrally connected in the left-right direction shown in the drawing. The corrugated cardboard package 30 includes a pair of outer flaps 5a extending from the top plate 1 in the vertical direction shown in the drawing, and a pair of outer flaps 5b extending from the bottom plate 2 in the vertical direction shown in the drawing. Further, the corrugated cardboard package 30 includes a pair of inner flaps 4a extending from the side plate 3a and a pair of outer flaps 4b extending from the side plate 3b in the vertical direction shown in the drawing.

By adhering the sticking plate 3c shown in FIG. 1 to the side plate 3b, a square tubular shape can be formed by the top plate 1, the side plates 3a and 3b, and the bottom plate 2. By superimposing a pair of outer flaps 5a and 5b on a pair of inner flaps 4a and 4b on the square tubular both end opening surfaces, the square tubular both end opening surfaces can be sealed.

As shown in FIG. 1, in the present embodiment, the outer flaps 5a and 5b have a corrugated cardboard cross section waveform in a direction (TD direction: Transverse Direction) orthogonal to the fiber direction (MD direction: Machine Direction) of the corrugated cardboard package. It has a direction in which the hollow flows in the hollow configuration. The outer flap 5a is provided with the first breaking lines 6a and 6b, and the outer flap 5b is provided with the first breaking lines 6c and 6d. Further, a second break line 7a is provided along the boundary between the top plate 1 and the side plate 3b so as to be connected to the first break line 6a of the outer flap 5a. The bottom plate 2 is provided with a plurality of non-slip slits 8 for preventing the corrugated cardboard package 30 from slipping. In addition, in the corrugated cardboard package 30, there may be a case where the non-slip slit 8 is not provided.

Next, the configurations of the first breaking lines 6a to 6d and the second breaking lines 7a provided on the corrugated cardboard package 30 in the assembled state shown in FIG. 2 will be described.

As shown in FIG. 2, on the outer flap 5a extending from the top plate 1, two first breaking lines 6a and 6b are provided so as to widen the distance between the outer flaps 5a and the top plate 1 side from the tip of the outer flap 5a. It is provided. Further, the outer flap 5b extending from the bottom plate 2 is provided with two first breaking lines 6c and 6d so that the distance between the outer flaps 5b and the bottom plate 2 side increases from the tip of the outer flap 5b.

Specifically, the central portions on the tip side facing each other with the outer flaps 5a and 5b are the opening portions A1A2 and D1D2 when the corrugated cardboard package 30 is opened. In the outer flap 5a, first breaking lines 6a and 6b are provided from both ends A1 and A2 of the opening portion A1A2 to both ends B1 and B2 of the boundary line (outer flap boundary line) 9a between the outer flap 5a and the top plate 1. ing. Similarly, in the outer flap 5b, the first breaking lines 6d and 6c extend from both ends D1 and D2 of the opening portion D1D2 to both ends E1 and E2 of the boundary line (outer flap boundary line) 9b between the outer flap 5b and the bottom plate 2. It is provided. Further, also in the outer flaps 5a and 5b on the back side of FIG. 2, the first break lines 6a, 6b, 6c and 6d are provided as in the case of the outer flaps 5a and 5b on the front side.

Further, a second break line 7a is provided along the boundary line (top plate side boundary line, also referred to as “ryo”) 10a between the top plate 1 and the side plate 3b. That is, in FIG. 2, from the right end B1 of the outer flap boundary line 9a between the outer flap 5a on the front side and the top plate 1, the corresponding end C1 of the outer flap boundary line 9a between the outer flap 5a on the back side and the top plate 1 Up to this point, a second break line 7a is provided along the top plate side boundary line 10a between the top plate 1 and the side plate 3b. The second break line 7a is connected to the first break line 6a of the outer flap 5a on the front side and the first break line 6a of the outer flap 5a on the back side. In addition, in FIG. 1 and FIG. 2, in order to distinguish the second break line 7a and the top plate side boundary line 10a, they are shown so as not to overlap each other. The second breaking line 7a may be provided so as to overlap the top plate side boundary line 10a, or may be provided so as to be offset from each other so as not to overlap.

A method of performing the packaging work using the corrugated cardboard packaging body 30 will be described. First, after placing the object to be packaged 40 to be packaged on the bottom plate 2, a pair of left and right side plates 3a and 3b are raised at right angles to the bottom plate 2, and the top plate 1 is bent in parallel with the bottom plate 2. The bottom plate 2, the top plate 1, and the pair of left and right side plates 3a and 3b are assembled into a square cylinder as a whole, the sticking plate 3c is bent, placed on the side plates 3b, and fixed with an adhesive at the adhesive portion 12b.

Next, the inner flaps 4a and 4b are bent inward, and the outer flaps 5a and the outer flaps 5b are further bent and superposed on the inner flaps 4a and 4b. Finally, the outer flaps 5a and 5b and the inner flaps 4a and 4b are fixed by an adhesive at the adhesive portion 12a on the outer side of the first breaking lines 6a, 6b, 6d and 6c provided on the outer flaps 5a and 5b. , Obtain the corrugated cardboard package 30 in the assembled state of FIG.

Next, a method of opening the corrugated cardboard package 30 will be described. First, in the opening portion A1A2 located at the central portion on the tip side of the outer flaps 5a and 5b, a force is applied so as to grasp the outer flaps 5a on the front side and the back side of FIG. 2 and peel off the outer flaps 5a. As a result, the first break lines 6a and 6b are broken from the tip end side 11a of the outer flap 5a, and then the second break line 7a connected to the first break line 6a is broken. Similarly, the outer flaps 5b on the front side and the back side of FIG. 2 are grasped and a force is applied so as to peel off the outer flaps 5b. As a result, the first break lines 6c and 6d are broken from the tip end side 11b of the outer flap 5b. In such a state, the top plate side boundary line 10b and the bottom plate side surface boundary lines 10c and 10d act as hinges, so that the top plate 1 and the side plate 3a are rotated and caused, and the corrugated cardboard package 30 is opened. That is, the corrugated cardboard package 30 is unfolded in a prostrate state and can be discarded without being bulky.

Next, the detailed configuration of the first breaking lines 6a to 6d and the principle of breaking will be described. FIG. 3 shows the first breaking lines 6a and 6b provided on the outer flap 5a of the corrugated cardboard package 30. Since each of the first break lines 6a to 6d has the same configuration in the present embodiment, the configuration of the first break line 6a will be described on behalf of each.

As shown in FIG. 3, the first break line 6a is configured by arranging a plurality of arc-shaped slits S (S1, S2, ..., Sn) at intervals from each other. The arcuate slits S are arranged so that the concave side of the curved portion faces the tip end side 11a of the outer flap 5a and the convex side faces the outer flap boundary line 9a. The starting ends of the plurality of arc-shaped slits S1, S2, ... Sn at the time of breaking are toward the end portion A1 of the opening portion A1A2. The end of the arc-shaped slit Sn is arranged at a position close to the end B1 of the outer flap boundary line 9a. The fact that the concave side of the arcuate slit S faces the tip end side 11a of the outer flap 5a means that the main direction of the concave side does not have the upward component in FIG. 3 but has the downward component. In the present embodiment, the main direction of the concave side of the arcuate slit S is downward to the right in FIG. 3, and has a downward component.

FIG. 4 shows a breaking mode of the first breaking line 6a in the corrugated cardboard package 30. As shown in FIG. 4, the start ends of the second arc-shaped slit S2 are arranged at intervals at the ends of the first arc-shaped slit S1 provided in the outer flap 5a having the direction in which the hollow flows in the TD direction. There is. Further, the respective arcuate slits S are arranged so that the start end of the second arcuate slit S2 overlaps with the first arcuate slit S1 in the direction in which the outer flap 5a extends (that is, downward in FIG. 4). ..

In the breaking mode of the first breaking line 6a shown in FIG. 4, at the time of opening, the opening force F acting upward in the direction of the MD from the right end A1 of the opening portion causes the first arcuate slit from the right end A1 of the opening portion. It is cut to the beginning of S1 and the fracture proceeds along the arc to reach the end of the first arc slit S1. At the end of the first arc-shaped slit S1, the slit cutting force f11 in the tangential direction and the opening force F acting upward in the drawing generate a breaking force F11 in the diagonally upward direction with respect to the opened portion, so that the break is second. It proceeds to the start end of the arcuate slit S2 and reaches the end end of the first arcuate slit S1 along the arc. In this way, the fracture proceeds in the order of the arc-shaped slits S1, S2, ... Sn, and the outer flap 5a is peeled off along the first fracture line 6a.

FIG. 5 shows a breaking mode of one breaking line formed by a conventional linear slit. As shown in FIG. 5, the opening force F acting upward in the direction of the MD from the end of the opening portion cuts from the end of the opening portion to the start end of the first linear slit T1, and the breakage is along the straight line. It reaches the end of the first linear slit T1. At the end of the first linear slit T1, the action of the slit cutting force f21 in the tangential direction and the opening force F acting upward in the drawing causes a breaking force F21 in the diagonally upward direction with respect to the opened portion, so that the breaking is second. It separates from the linear slit T2 of the above and does not proceed along the breaking line, resulting in free breaking.

Further, referring to FIGS. 4 and 5, the breaking forces F11, F12 ... F1n at the end of the arcuate slit of the present invention are closer to the breaking direction than the breaking force F21 at the end of the conventional linear slit. Since it is generated in the direction, the effect of opening the package easily along the break line can be obtained.

Further, when the package is impacted at the time of dropping or the like, if the local breaking line is broken by the impact, the front arc-shaped slit and the rear arc-shaped slit in the adjacent arc-shaped slit in the first breaking line of the present invention are used. Due to the deviation of the cut from the arc-shaped slit, the slit cutting force that reaches the end along the arc can be prevented from reaching the rear arc-shaped slit due to the cutting of the front arc-shaped slit, which is caused by the impact on the breaking line. Even if the local arc-shaped slit is broken, the occurrence of continuous breakage in the rear arc-shaped slit can be suppressed, and damage to the packaged object can be prevented. On the other hand, in the case of the conventional straight slit breaking line, the slit cutting force that reaches the end along the cut line of the front straight slit easily reaches the rear slit, and the slits can be continuously broken. Highly sex. That is, the corrugated cardboard package of the present invention can avoid free breakage during the opening operation and can surely cut the break line along the break line, and when the package is impacted when dropped or the like. However, by suppressing the continuous breakage of the break line, it is possible to improve the resistance of the package to the impact and to achieve both.

According to another embodiment of the present invention, similarly to the second breaking line 7a, from the other end B2 of the outer flap boundary line 9a on one side so as to be connected to the first breaking line 6b, the top plate side boundary line. A second break line 7b may be further provided along 10b up to the corresponding end C2 of the outer flap boundary line 9a on the opposite side (not shown). Further, the second breaking line 7b may be provided so as to overlap the top plate side surface boundary line 10b. In this case, the top plate is opened by simultaneously cutting the first breaking lines 6a and 6b provided on the outer flap 5a and the second breaking lines 7a and 7b provided on the top plate 1. 1 is completely separated and the corrugated cardboard package is opened.

The present invention does not limit the shape of the first break line. That is, at the first break line, the plurality of arc-shaped slits may be arranged in a straight line, or may be arranged in any other shape, for example, a curved line or a folded line.

Further, the design relating to factors such as the shape and size of each arc-shaped slit included in the break line provided in the corrugated cardboard package of the present invention, the spacing between adjacent arc-shaped slits, and the processing position in the corrugated cardboard package is designed for the corrugated cardboard package. It is related to the material, dimensions, usage conditions, etc. Therefore, these factors are not limited to this specification, and those in the same industry should take into consideration the description of this specification and make a judgment according to a specific usage situation. The first break line of the present invention may include slits having different shapes and / and dimensions, or / and intervals between adjacent arc-shaped slits.

Next, using the corrugated cardboard package according to the present invention, the cutting probability of the arc-shaped slit at the time of opening and the effect of suppressing damage to the packaged object when the local arc-shaped slit is destroyed by dropping or impact are evaluated. The test is shown.

The cutting test of the breaking line at the time of opening was carried out as follows. For comparison, a similar evaluation was performed using a corrugated cardboard package in which a break line formed by a conventional linear slit was provided on the outer flap as a comparative example.

1. 1. Package <Example>
The present invention shown in FIG. 2 is provided with the first break line and the second break line using a B flute corrugated cardboard material having a hollow flow direction in the TD direction and a thickness of 3 mm. The corrugated cardboard packaging according to the embodiment was used.
<Comparative example 1>
With reference to Japanese Patent Application Laid-Open No. 09-207933 and Japanese Patent Application Laid-Open No. 09-207934, which use a B-flute corrugated cardboard material having a hollow flow direction in the TD direction and a thickness of 3 mm, the outer flap and the top plate are shown in FIG. A corrugated cardboard package provided with a breaking line composed of linear slits as shown was used.
<Comparative example 2>
As shown in FIG. 6, the outer flap and the top plate are provided along the breaking direction by using a B flute corrugated cardboard material having a hollow flowing direction in the TD direction and a thickness of 3 mm. A corrugated cardboard package provided with a breaking line composed of a linear slit and a linear slit in the TD direction provided between the adjacent linear slits was used.

2. Items to be packaged 10 test products with a metal cap covered in a bottle filled with 50 mL of water are packed in a coated ball packaging box, and the three boxes are used as the items to be packaged in a corrugated cardboard package. Was done.

3. 3. Evaluation Method Ten boxes of each of the packages of Example, Comparative Example 1, and Comparative Example 2 were prepared, opened from the opened portion of the outer flap of each package, the top plate was separated, and the package was developed in a flat state. .. In the opening operation, an evaluation test was conducted on cutting the outer flap of each package and the breaking line provided on the top plate, and the results are shown in Table 1.

According to the evaluation results shown in Table 1, the plurality of discontinuous arcuate slits of the present invention were cut along the breaking line in all the test processes. On the other hand, in the conventional linear slit in Comparative Example 1 or Comparative Example 2, it was found that the cutting did not proceed along the breaking line in the middle and free breaking may occur.

Next, the fracture resistance test of the corrugated cardboard package assuming the case of being impacted by dropping or tilting was carried out as follows.

1. 1. Evaluation of damage to the packaged object due to the drop impact Based on the Japanese Industrial Standards JIS Z 0202-1994 Packaged Cargo-Drop test method using the above <Example>, the package cover is destroyed by the drop impact. Damage to the packaging was evaluated based on the following criteria.
Sample mass: 4,500 g
Japanese Industrial Standards JIS Z 0200: 2013 Packaged cargo-Performance test method In the impact test of general rules, there is a certain degree of risk of applying a very large external force with a large number of transfer transshipments at category level 1, and transfer transshipment and transfer transshipment at category level 3. Two levels were adopted: the amount of external force to be applied is usually assumed.
Category level 1 is when the drop height starts from 30 cm, the height is increased every 10 cm, and the height is cumulatively dropped toward the floor where the iron plate is installed, and then dropped to a height of 80 cm. , Slits and objects to be packaged are not damaged.
Category level 3 means that the slit and the object to be packaged are not damaged when dropped from a drop height of 40 cm 10 times repeatedly.
Depending on the type and handling method of the packaged cargo, or the agreement between the delivery parties, the top plate and bottom plate side boundary line, and part of the surface drop test can be omitted. The fall from (Ryo) was excluded.

2. Evaluation of damage to the packaged object due to tilt impact Using the above <Examples>, Japanese Industrial Standards JIS Z 0200: 2003 Packaged Cargo Test Based on the method of tilt impact test, the slits of the package are destroyed by the tilt impact. Damage to the packaged material was evaluated based on the following criteria.
Sample mass: 4,500 g
Japanese Industrial Standards JIS Z 0200: 2013 Packaged cargo-Performance test method In the impact test of general rules, there is a certain degree of risk of applying a very large external force with a large number of transfer transshipments at category level 1, and transfer transshipment and transfer transshipment at category level 3. Two levels were adopted: the amount of external force to be applied is usually assumed.
Category level 1 is a slit and when the wall on which the iron plate is installed at a collision speed of 2 m / s collides with the opening surface having the direction in which the hollow flows in the TD direction and the side surface having the direction in which the hollow flows in the MD direction. The object to be packaged is undamaged.
Category level 3 is a slit and when the wall on which the iron plate is installed at a collision speed of 1 m / s collides with the opening surface having the direction in which the hollow flows in the TD direction and the side surface having the direction in which the hollow flows in the MD direction. The object to be packaged is undamaged.
Table 3 shows the results of evaluation based on the above, using 3 boxes of samples, based on the fact that damage to the packaged object is not caused by breaking the slit.
Tilt impact tester tilt angle 10 °
Category Level 3 Collision speed 1 m / s, gliding distance 39 cm
Category Level 1 Collision speed 2 m / s, gliding distance 144 cm

As shown in Tables 2 and 3, no damage occurred at the break line of the corrugated cardboard package of the present invention and no damage occurred in the packaged object in any of the test processes. That is, it was confirmed that the corrugated cardboard package of the present invention has sufficient strength against a drop impact or an inclination impact during transportation, and there is no problem in practical use.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Any equivalent modifications made based on the content of the present invention and direct or indirect use are all within the scope of the claims of the present invention.

30 Corrugated cardboard packaging 40 Object to be packaged 1 Top plate 2 Bottom plate 3a, 3b Side plate 3c Adhesive plate 4a, 4b Inner flap 5a, 5b Outer flap 6a, 6b, 6c, 6d 1st break line 7a 2nd break line 8 Non-slip Slits 9a, 9b Outer flap boundary line 10a, 10b Top plate side boundary line
10c, 10d Bottom plate side boundary line
11a, 11b Tip side of outer flap 12a, 12b Adhesive part A1A2, D1D2 Opening part B1, B2, C1, C2, E1, E2 End of outer flap boundary line (top plate / bottom plate side boundary line) S1, S2, ... Sn Arc-shaped slit T1, T2, ... Tn Linear slit F Opening force f11, f12 Slit cutting force at the end of the arc-shaped slit f21 Slit cutting force at the end of the linear slit F11, F12 Breaking force at the end of the arc-shaped slit F21 Breaking force at the end of a linear slit

Claims (2)

A square cylinder is formed by a top plate, a bottom plate, and a pair of side plates connecting the top plate and the bottom plate, and on the opening surfaces at both ends of the square cylinder, a pair of inner flaps extending from the side plates are formed. On the other hand, in a wraparound type corrugated cardboard package configured to seal the opening surfaces at both ends of the square cylinder by stacking a pair of outer flaps extending from the top plate and the bottom plate.
The outer flap has a direction in which the hollow in the corrugated hollow configuration of the corrugated cardboard cross section flows in a direction orthogonal to the extending direction thereof.
In each of the outer flaps, a plurality of first breaking lines extending from the central portion on the tip end side of the outer flap to both ends of the boundary line with the top plate or the bottom plate, and
A second break line provided along the boundary line between the top plate and the side plate is provided so as to be continuous with the first break line in the outer flap extending from the top plate.
The first break line is formed by arranging a plurality of arc-shaped slits, and each of the arc-shaped slits has a shape in which the concave side faces the tip end side of the outer flap, and the direction in which the concave side faces is the outer side. Arranged so that there is no component in the opposite direction to the tip side of the flap,
The plurality of arcuate slits are arranged from the tip end side of the outer flap toward the extending direction of the first breaking line, and the start end and the end end when each of the arcuate slits is broken from the tip end side of the outer flap. Of these, the starting end is located on the tip side of the outer flap,
In the direction of the array, and the first of the arcuate slit and the second of said arcuate slits adjacent to each other, which are arranged in this order, the second of said arcuate spaced the termination of the first of said arcuate slits The start end of the slit is arranged, and the start end of the second arcuate slit is arranged so as to overlap the first arcuate slit in the extending direction of the outer flap.
The second break line is formed by arranging a plurality of slits.
Corrugated cardboard packaging. The corrugated cardboard package according to claim 1, wherein a plurality of the arc-shaped slits are linearly arranged at the first breaking line.

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