JP5661362B2 - Cardboard box - Google Patents

Description

  The present invention relates to a cardboard box for storing various items including vegetables such as lettuce, and more particularly to a cardboard box in which an opening is formed on the top surface so that internal items can be seen.

Conventionally, as this type of corrugated cardboard box, for example, the one described in Patent Document 1 (Japanese Patent Laid-Open No. 2003-312639) is known.
As shown in FIGS. 9 and 10, this conventional cardboard box Ba has a pair of upper end flaps 101 connected from a pair of end walls 100 and a pair of upper flaps 111 connected from a pair of side walls 110, respectively. The upper and outer corners 102 of the upper end flap 101 are inserted into and engaged with the outer side corners 102 of the upper side flap 111 from the surface side of the upper side flap 111 . The edge 104 of the upper flap 101 and the edge of the upper flap 111 in a state where the upper outer corner 102 is inserted into the insertion hole 113 and the both end portions 103 of the upper end flap 101 and the both end portions 112 of the upper flap 111 are overlapped. An opening 121 is formed in the top surface 120 by 114. The upper end flap 101 is formed with a gripping hole 105 that is gripped when the cardboard box Ba is carried in a state in which an article is accommodated inside the cardboard box Ba.

When the top surface 120 is closed in the state in which items are stored in the cardboard box Ba, the upper and outer corners 102 of the upper end flap 101 are inserted into the insertion holes 113 of the upper side flap 111 from the surface side of the upper side flap 111. The both end portions 103 of the upper end flap 101 are overlapped with the both end portions 112 of the flap 111, respectively. Thereby, the upper end flap 101 is pressed by the upper side flap 111, the upper side flap 111 is pressed by the upper end flap 101, the opening 121 is formed in the top surface 120, and the top surface 120 is closed.
When the cardboard box Ba is carried in a state in which an article is accommodated in the conventional cardboard box Ba, a hand is inserted into the grip hole 105 formed in the upper end flap 101, and the wall portion 105a constituting the grip hole 105 is inserted. Is carried out by lifting the cardboard box by hand. In this case, a hand is inserted into both gripping holes 105 and held with both hands, or a hand is inserted into only one gripping hole 105 and held with one hand. By the way, in this method of holding with one hand, since the holding hole 105 is narrow and difficult to hold, for example, as shown in FIG. I also support and have it.

JP 2003-312639 A

However, in this conventional cardboard box Ba, when the hand is put in the opening 121 and the edge 104 of the upper end flap 101 is supported by hand, the upper end flap 101 can be supported by hand, but the upper flap 111 is Since it cannot be supported by hand, there is a problem that the upper outer corner portion 102 may come off from the insertion hole 113 and come off.
Further, the width of the opening 121 is limited, and it may be difficult to insert a hand, so that there is a problem that it is difficult to hold the cardboard box Ba.

  The present invention has been made in view of such problems, and when the hand is put in the opening and the edge of the upper end flap is supported by hand, the upper and outer corners are made difficult to come off from the insertion hole. It is an object of the present invention to provide a cardboard box that can be easily held and can be easily supported.

In order to achieve such an object, a cardboard box according to the present invention has a pair of upper end flaps connected from a pair of end walls and a pair of upper flaps connected from a pair of side walls, respectively. The upper and outer corners on the outer side of the upper end flap are inserted into the both side end portions of the flap from the surface side of the upper flap to engage, and the upper and outer corners of the upper end flap are formed on the insertion hole. In a corrugated cardboard box in which an opening is formed on the top surface by the edge of the upper flap and the edge of the upper flap in a state where the both ends of the upper flap and the both ends of the upper flap are overlapped The at least one upper flap is notched from the edge constituting the opening of the upper flap, and has a notch surface along the edge of at least one upper flap. And has a configuration in which a part is provided with a cutout portion which can be inserted in the hand when supported by hand edge of the upper end flap.

As a result, when closing the top surface of the cardboard box with items stored therein, insert the upper and outer corners of the upper flap into the insertion hole of the upper flap from the surface side of the upper flap, and The upper and outer corners of the upper end flap are overlapped with the respective parts. As a result, the upper end flap is pressed by the upper flap, the upper flap is pressed by the upper end flap, an opening is formed in the top surface, and the top surface is closed.

  And when carrying a cardboard box in the state which stored the goods in the inside of this cardboard box, for example, a hand is put in an opening and the edge of an upper end flap is supported and held. At this time, a part of the hand is inserted into the notch, and the notch surface of the notch is supported by hand together with the edge of the upper end flap.

In this case, not only the edge of the upper end flap constituting the opening but also the notch surface of the notch portion can be gripped by hand, that is, the edge of the upper end flap and the notch surface of the notch portion can be simultaneously held by hand. Since it is supported, when the cardboard box is held, it is possible to prevent a situation in which the upper and outer corners come off from the insertion hole and come off.
In addition, since the notch surface is formed along the edge of the upper flap, the width of the opening can be increased, so that it is easier to insert and support the cardboard box, making it easier to hold the cardboard box Can do.

And as needed, it is set as the structure which provided the said notch part corresponding to the edge of said pair of upper end flap, respectively.
Thereby, since either side of a pair of upper end flaps may be grasped, operativity can be improved.

Moreover, it is set as the structure which provided the said notch in the diagonal position of the said opening as needed.
As a result, not only one upper flap but also both upper flaps are provided with cutout portions, so that the balance is improved, and thus the strength imbalance of the upper flap can be suppressed.

  Further, if necessary, an upright portion that constitutes a part of the insertion hole and rises on the upper continuous line with respect to the side wall of the upper flap and faces the outer edge of the upper outer corner of the upper end flap is provided. It has a configuration.

  As a result, when the upper end flap is inserted into the insertion hole, the outer edge of the upper outer corner of the upper end flap faces the upright part, so put the hand in the opening and support the edge of the upper end flap by hand. When the upper end flap is moved in the direction along its edge, the outer edge of the upper outer corner of the upper end flap collides with the upright portion and is locked. Movement in the direction along the edge can be prevented, so that the upper end flap can be reliably supported by hand. Further, since the upper end flap is difficult to move, it is possible to prevent the holding strength of the cardboard box from being impaired.

  Furthermore, if necessary, incisions are made on both side edges of the upper end flap from the edge of the upper end flap in the left-right symmetrical position, the upper outer corners are formed outside the upper end flap notch, and the upper end flap is formed. An upper intermediate piece is formed on the inner side of the notch, and the distance between the upper end continuous line with respect to the end wall of the upper end flap and the edge of the upper intermediate piece is set to the upper end continuous line and the upper outer side. It is configured to be shorter than the distance between the corner edges.

  As a result, when the upper outer corner of the upper end flap is inserted into the insertion hole and the upper end flap is inserted into the insertion hole, the upper intermediate piece overlaps the upper flap, but at this time, the peripheral portion of the insertion hole Enters the cut, and the upper middle piece moves separately from the upper and outer corners by the cut and overlaps the upper flap. In this case, because the distance between the upper end continuous line of the upper end flap and the edge of the upper intermediate piece part is shorter than the distance between the upper end continuous line and the edge of the upper outer corner part, Since the upper middle piece overlaps the upper flap after the upper and outer corners are inserted into the insertion hole to some extent, it does not get in the way, so that the upper end flap can be easily inserted into the insertion hole.

And, if necessary, a pair of lower end flaps connected from the pair of end walls and a pair of lower side flaps connected from the pair of side walls and joined to each other, and configured as described above, An insertion hole is formed at both side end portions of the lower flap so that the lower outer corner portion outside the lower end flap is inserted from the surface side of the lower flap, and the lower outer corner portion of the lower end flap is It is set as the structure hold | maintained in the state which inserted in the insertion hole and the both-sides edge part of the said lower end flap and the both-sides edge part of the said lower side flap were piled up.

Under Thus, when assembling the cardboard box to build a bottom wall of the carton, they are joined to each other edge of the pair of lower flap, the lower outer corner of the lower end flap to the difference-entry apertures of the lower flap It inserts from the surface side of a side flap, and the lower outer corner part of a lower end flap is piled up and hold | maintained at the both ends of a lower flap, respectively. Thereby, since a lower end flap is pressed down by a lower side flap and a lower side flap is pressed down by a lower end flap, the intensity | strength of a bottom wall can be improved.

  Further, if necessary, incisions are made on both side edges of the lower end flap from the end edges of the lower end flaps at left and right symmetrical positions, the lower outer corners are formed outside the lower end flap notches, and the lower end flaps A lower intermediate piece is formed inside the notch, and the distance between the lower end continuous line with respect to the end wall of the lower end flap and the end edge of the lower intermediate piece is defined as the lower end continuous line and the lower outer corner. It is the structure formed shorter than the distance between the edge of a part.

  Thus, when the lower outer corner of the lower end flap is inserted into the insertion hole and the lower end flap is inserted into the insertion hole, the lower intermediate piece overlaps with the lower flap. The portion enters the cut, and the lower intermediate piece moves separately from the lower outer corner portion by the cut and overlaps the lower flap. In this case, since the distance between the lower end continuous line of the lower end flap and the edge of the lower intermediate piece is formed shorter than the distance between the lower end continuous line and the edge of the lower outer corner, Since the lower intermediate piece portion overlaps the lower flap after the lower outer corner portion is inserted into the insertion hole to some extent, it does not get in the way, so that the lower end flap can be easily inserted into the insertion hole.

Furthermore, if necessary, an anti-slip agent is applied to at least one surface of the pair of upper end flaps and the pair of upper flaps.
As a result, an anti-slip agent is applied to the top surface of the cardboard box, so that when the cardboard boxes are stacked, the bottom wall of the cardboard box located on the upper side does not slide against the top surface of the cardboard box located on the lower side. Therefore, the stability when the cardboard boxes are stacked can be improved.

According to the cardboard box of the present invention, the upper and outer corners of the upper end flap are inserted into the insertion holes of the upper flap from the surface side of the upper flap, and the upper and outer corners of the upper end flap are respectively overlapped on both side ends of the upper flap. When the product is housed and carried in the state, for example, a hand is put in the opening and the edge of the upper end flap is supported and held by hand. At this time, a part of the hand is inserted into the notch, and the notch surface of the notch is supported by hand together with the edge of the upper end flap. In this case, not only the edge of the upper end flap constituting the opening but also the notch surface of the notch portion can be gripped by hand, that is, the edge of the upper end flap and the notch surface of the notch portion can be simultaneously held by hand. Since it is supported, when the cardboard box is held, it is possible to prevent a situation in which the upper and outer corners come off from the insertion hole and come off. In addition, since the notch surface is formed along the edge of the upper flap, the width of the opening can be increased, so that it is easier to insert and support the cardboard box, making it easier to hold the cardboard box Can do.

1 is a perspective view showing a cardboard box according to an embodiment of the present invention. It is an expanded view which shows the cardboard box which concerns on embodiment of this invention. It is a perspective view which shows the cardboard box which concerns on embodiment of this invention in the state which closed the top | upper surface. It is the perspective view which looked at the cardboard box concerning an embodiment of the invention from the bottom wall side. It is the perspective view which looked at the cardboard box concerning an embodiment of the invention from the bottom wall side in the state where the bottom wall was constructed. It is a perspective view which shows the assembly procedure of the cardboard box which concerns on embodiment of this invention. It is a perspective view shown in the state where the cardboard box concerning an embodiment of the invention was held by hand. It is a principal part enlarged view at the time of having and holding the cardboard box which concerns on embodiment of this invention by inserting a hand in opening. It is a perspective view which shows an example of the conventional cardboard box. It is a perspective view which shows the conventional cardboard box in the state which put the hand in opening and supported the edge of the upper end flap by hand.

Hereinafter, a cardboard box according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 8 show a cardboard box B according to an embodiment of the present invention. The cardboard box B has a pair of upper end flaps 10 connected from a pair of rectangular end walls 1 and a pair of upper flaps 30 connected from a pair of rectangular side walls 20, respectively. Insertion holes 32 are formed on both side end portions 30 of the upper end flap 10 so that the upper and outer corner portions 11 outside the upper end flap 10 are inserted from the surface side of the upper flap 30 to engage with each other. In the state where the both end portions 12 of the upper end flap 10 and the both end portions 31 of the upper side flap 30 are overlapped by being inserted into the insertion hole 32, the top surface 40 is formed by the end edge 13 of the upper end flap 10 and the end edge 33 of the upper side flap 30. The opening 41 is formed. A pair of end walls 1 is formed with a handle hole 4 into which a hand is inserted when holding the cardboard box B with both hands.

The pair of upper end flaps 10 are formed in a rectangular shape, and incisions 14 are made in both side edge portions 12 at left and right symmetrical positions from the end edges 13 of the upper end flap 10, and upper and outer corner portions 11 are formed outside the notches 14. The upper intermediate piece 15 is formed inside the notch 14. Further, the distance L1 between the upper end continuous line 2 with respect to the end wall 1 of the upper end flap 10 and the end edge 13 of the upper intermediate piece portion 15 is the distance between the upper end continuous line 2 and the end edge 13 of the upper outer corner portion 11. It is formed shorter than the distance L2. Furthermore, an anti-slip agent 42 such as varnish is applied to the upper intermediate piece 15 on the surface of the upper end flap 10.

  The pair of upper flaps 30 are formed in a rectangular shape, are notched from the edge 33 constituting the opening 41 of the upper flap 30, and have a notch surface 34a along the edge 33 of the upper end flap 10. A notch 34 into which a part of the hand can be inserted when the edge 13 of the upper end flap 10 is supported by hand is provided. A pair of notches 34 are provided at diagonal positions of the opening 41 corresponding to the edges 13 of the pair of upper end flaps 10, respectively.

A pair of insertion holes 32 are formed in the upper flap 30. The insertion hole 32 is formed in a convex shape, and is formed by cutting the upper flap 30 except for one end 32a. Further, a tongue piece 35 is formed by hanging from one end 32 a of the insertion hole 32 toward the lower side of the upper flap 30. The insertion hole 32 constitutes a part of the insertion hole 32 and rises on the upper continuous line 21 with respect to the side wall 20 of the upper flap 30 and faces the outer edge 11 a of the upper outer corner portion 11 of the upper end flap 10. A standing part 36 is provided.
Further, an anti-slip agent 42 such as a varnish is applied to the surface of the upper flap 30 between the pair of insertion holes 32.

Further, the cardboard box B includes a pair of lower end flaps 50 respectively connected from the pair of end walls 1 and a pair of lower side flaps 60 respectively connected from the pair of side walls 20 to which the end edges 63 are joined. Configured. Insertion holes 62 are formed in both side end portions 61 of the lower flap 60 so that the lower outer corners 51 outside the lower end flap 50 are inserted from the surface side of the lower flap 60 and engaged with each other. The outer corner 51 is inserted into the insertion hole 62 and the both end portions 52 of the lower end flap 50 and the both end portions 61 of the lower flap 60 are held in an overlapped state.

  The pair of lower end flaps 50 are formed in a rectangular shape, and incisions 54 are formed in both side edge portions 52 at left and right symmetrical positions from the end edges 53 of the lower end flap 50, and lower outer corner portions 51 are formed outside the notches 54. The lower intermediate piece 55 is formed inside the notch 54. The distance L3 between the lower end continuous line 3 and the end edge 53 of the lower intermediate piece 55 with respect to the end wall 1 of the lower end flap 50 is the distance between the lower end continuous line 3 and the end edge 53 of the lower outer corner 51. It is formed shorter than the distance L4.

  The pair of lower flaps 60 are formed in a rectangular shape, and a pair of insertion holes 62 are formed. The insertion hole 62 is formed in a convex shape, and is formed by cutting the lower flap 60 except for one end 62a. Further, a tongue piece 64 is formed depending on one end 62 a of the insertion hole 62.

When manufacturing the cardboard box B according to the embodiment of the present invention, for example, the cardboard paper is cut one by one into a necessary size for one cardboard box B, and the outer surface is attached when the cut cardboard paper is assembled. Characters are printed on the surface to be formed using, for example, colored ink such as blue or green, and then an anti-slip agent 42 such as varnish is applied to portions other than the printed portions of the pair of upper flaps 10 and the upper flaps 30. Then, cut 14 is made in the upper end flap 10 to cut the edge 13 side of the upper intermediate piece 15 and cut so that the insertion hole 32 is formed in the upper flap 30. A notch 54 is inserted to cut the end 53 side of the lower intermediate piece 55 and a notch is formed so that an insertion hole 62 is formed in the lower flap 60, and the handle hole 4 is formed in the end wall 1. As the end wall 1 hollow performed by folding the corrugated board.

Therefore, in the cardboard box B according to the embodiment of the present invention, when the top surface 40 is closed in the state in which the goods are stored inside, the following is performed.
First, the bottom wall 70 is constructed and the cardboard box B is assembled. As shown in FIGS. 4 and 5, the end edges 63 of the pair of lower flaps 60 are joined to each other, and the lower outer corner 51 of the lower end flap 50 is lowered to the insertion hole 62 of the lower flap 60. The both side end portions 52 of the lower end flap 50 are overlapped and held on both side end portions 61 of the lower flap 60 by being inserted from the surface side of the side flap 60. In this case, when the lower outer corner 51 of the lower end flap 50 is inserted into the insertion hole 62 and the lower end flap 50 is inserted into the insertion hole 62, the lower intermediate piece 55 is overlapped with the lower flap 60. At this time, the peripheral edge of the insertion hole 62 enters the notch 54, and the lower intermediate piece 55 moves separately from the lower outer corner 51 by the notch 54 and overlaps the lower flap 60. In this case, the distance L3 between the lower end continuous line 3 of the lower end flap 50 and the edge 53 of the lower intermediate piece 55 is the distance L4 between the lower end continuous line 3 and the edge 53 of the lower outer corner 51. Since the lower intermediate piece 55 overlaps the lower flap 60 after the lower outer corner 51 is inserted into the insertion hole 62 to some extent, it does not get in the way, and therefore the lower end The flap 50 can be easily inserted into the insertion hole 62.
Thereby, since the lower end flap 50 is pressed down by the lower side flap 60 and the lower side flap 60 is pressed down by the lower end flap 50, the intensity | strength of the bottom wall 70 can be improved.

Then, the goods are stored inside and the top surface 40 is closed. Specifically, as shown in FIG. 6, the upper and outer corners 11 of the upper end flap 10 are inserted into the insertion holes 32 of the upper flap 30 from the surface side of the upper flap 30, and the upper end flap 10 is inserted into both end portions 31 of the upper flap 30. The both side end portions 12 of each are overlapped. In this case, when the upper and outer corners 11 of the upper end flap 10 are inserted into the insertion hole 32 and the upper end flap 10 is inserted into the insertion hole 32, the upper intermediate piece 15 overlaps the upper flap 30. The peripheral edge of the insertion hole 32 enters the cut 14, and the upper intermediate piece 15 moves separately from the upper outer corner 11 by the cut 14 and overlaps the upper flap 30. In this case, the distance L1 between the upper end continuous line 2 of the upper end flap 10 and the edge 13 of the upper intermediate piece 15 is the distance L2 between the upper end continuous line 2 and the edge 13 of the upper outer corner 11. Since the upper intermediate piece 15 overlaps the upper flap 30 after the upper outer corner portion 11 is inserted into the insertion hole 32 to some extent, it does not get in the way, and therefore, the upper end flap 10 can be easily inserted into the insertion hole 32.
Thereby, the upper end flap 10 is pressed by the upper side flap 30, the upper side flap 30 is pressed by the upper end flap 10, the opening 41 is formed in the top surface 40, and the top surface 40 is closed.

  And when carrying the cardboard box B in a state in which the goods are accommodated inside the cardboard box B, for example, the hands are inserted into the handle holes 4 formed in the pair of end walls 1 and the cardboard box B is held with both hands. Alternatively, for example, as shown in FIG. 7, a hand is put into the opening 41 and the end edge 13 of the upper end flap 10 is supported and held with one hand. When holding with one hand, a part of the hand is inserted into the notch portion 34 so that the notch surface 34a of the notch portion 34 is supported by the hand together with the edge 13 of the upper end flap 10.

  In this case, not only the edge 13 of the upper end flap 10 constituting the opening 41 but also the notch surface 34a of the notch 34 can be gripped by hand, that is, the edge 13 and the notch 34 of the upper end flap 10 can be grasped by hand. Since the notch surface 34a is supported by hand at the same time, when the cardboard box B is held, it is possible to prevent the upper and outer corners 11 from coming off from the insertion hole 32 and coming off.

  In addition, since the notch surface 34a is formed along the edge 13 of the upper end flap 10, the width of the opening 41 can be increased. Since it becomes easy to support the notch surface 34a of the notch 34, the cardboard box B can be easily held.

  Further, when the upper end flap 10 is inserted into the insertion hole 32, the outer edge 11a of the upper outer corner portion 11 of the upper end flap 10 faces the upright portion 36 as shown in FIG. When the end edge 13 of the upper end flap 10 is supported by hand and the upper end flap 10 tries to move in the direction along the end edge 13, Since 11a collides with the standing part 36 and comes to be locked, the movement of the upper end flap 10 in the direction along the edge 13 can be prevented, so that the upper end flap 10 is securely supported by hand. be able to. Moreover, since the upper end flap 10 becomes difficult to move, it is possible to prevent the holding strength of the cardboard box B from being impaired.

  Furthermore, since the notches 34 are provided corresponding to the end edges 13 of the pair of upper end flaps 10, they can be gripped on either side of the pair of upper end flaps 10. Can be improved. Moreover, since the notch 34 is provided at the diagonal position of the opening 41, the notch 34 is provided not only on one upper flap 30 but also on both upper flaps 30. As a result, the strength imbalance of the upper flap 30 can be suppressed.

  The cardboard boxes B are stacked and stored in, for example, a warehouse. At this time, since the anti-slip agent 42 is applied to the top surface 40 of the cardboard box B, when the cardboard boxes B are stacked, the bottom wall 70 of the cardboard box B located on the upper side is located on the lower side. Therefore, the stability when the cardboard boxes B are stacked can be improved.

In the above embodiment, the cardboard box B is manufactured according to the above procedure, but the present invention is not necessarily limited thereto.
Note also, in the aforementioned embodiment has been coated with anti-lubricant 42 to the surface of the upper end flap 10 and the upper flap 30 is not necessarily limited thereto, also on the surface of the lower end flaps 50 and the lower flap 60 It may be applied and may be changed as appropriate. In this case, since the anti-slip agent 42 is applied to the top surface 40 and the bottom wall 70, when the cardboard boxes B are stacked, the bottom wall 70 of the cardboard box B positioned on the upper side is positioned on the lower side. The cardboard box B becomes less slippery with respect to the top surface 40, so that the stability when the cardboard boxes B are stacked can be further improved. Further, the anti-slip agent 42 may be applied only to the surfaces of the lower end flap 50 and the lower flap 60.

B Cardboard box 1 End wall 2 Upper end connecting line 3 Lower end connecting line 4 Handle hole 10 Upper end flap 11 Upper outer corner 12 Side end 13 Edge 14 Notch 15 Upper intermediate piece 20 Side wall 21 Upper connecting line 30 Upper Flap 31 Side end portion 32 Insertion hole 33 End edge 34 Notch portion 34a Notch surface 35 Tongue piece 36 Standing portion 40 Top surface 41 Opening 42 Anti-slip agent 50 Lower end flap 51 Lower outer corner portion 52 Side end portion 53 Edge 54 Notch 55 Lower intermediate piece 60 Lower flap 61 Side end 62 Insertion hole 63 End edge 64 Tongue piece 70 Bottom wall

Claims (8)

It has a pair of upper end flaps connected from the pair of end walls and a pair of upper flaps connected from the pair of side walls, respectively, and upper and outer corners outside the upper end flaps at both side ends of the upper flap. Is inserted from the surface side of the upper flap to form an insertion hole, and the upper and outer corners of the upper end flap are inserted into the insertion hole to form both side ends of the upper end flap and both sides of the upper flap. In a cardboard box in which an opening is formed on the top surface by the edge of the upper end flap and the edge of the upper flap in a state where the ends are overlapped,
The at least one upper flap has a notch formed from an edge constituting the opening of the upper flap, and has a notch surface along the edge of at least one upper flap. A cardboard box provided with a notch part into which a part of the hand can be inserted when the edge is supported by hand.   2. The cardboard box according to claim 1, wherein the notch is provided corresponding to an edge of each of the pair of upper end flaps.   The cardboard box according to claim 2, wherein the notch is provided at a diagonal position of the opening.   A part of the insertion hole is formed, and an upright portion is provided which stands on an upper continuous line with respect to the side wall of the upper flap and faces an outer edge of the upper outer corner portion of the upper end flap. The cardboard box according to any one of claims 1 to 3.   Cut the left and right edges of the upper end flap from the edge of the upper end flap in the left-right symmetrical position, form the upper and outer corners outside the upper end flap notch, and the upper middle inside the upper end flap notch A distance between the upper end continuous line with respect to the end wall of the upper end flap and the end edge of the upper intermediate piece is defined as the distance between the upper end continuous line and the edge of the upper outer corner. The cardboard box according to any one of claims 1 to 4, wherein the cardboard box is formed shorter than a distance between them. A pair of lower end flaps connected from the pair of end walls and a pair of lower flaps connected from the pair of side walls and joined to each other's edges, respectively, are formed at both side ends of the lower flap. The lower outer corner of the lower end flap is inserted from the surface side of the lower flap to form an insertion hole, and the lower outer corner of the lower end flap is inserted into the insertion hole. 6. The cardboard box according to claim 1, wherein both side ends of the flap and both side ends of the lower flap are held in an overlapped state.   Cut the left and right side edges of the lower end flap from the edge of the lower end flap in the left-right symmetric position, form the lower outer corner outside the lower end flap notch, and lower the middle inside the lower end flap notch A distance between the lower end continuous line with respect to the end wall of the lower end flap and the end edge of the lower intermediate piece is defined as a distance between the lower end continuous line and the lower outer corner end. 7. The cardboard box according to claim 6, wherein the cardboard box is shorter than the distance between them. The cardboard box according to any one of claims 1 to 7, wherein an anti-slip agent is applied to at least one surface of the pair of upper end flaps and the pair of upper flaps.

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