JP2011057236A - Packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag that has a locking function for making it easy to open a lid and that can be correctly and securely formed. <P>SOLUTION: The packaging box, including a front panel, side panels, a rear panel, the lid, a side flap formed along the end of each of the side panels, and an insertion flap formed along the edge of the lid, has a locking portion at the side edge of each side flap and a pressing portion at the corresponding insertion flap, wherein the pressing portion disposed in a part to be engaged with the locking portion includes a recess on the surface of the insertion flap and a projection on the rear of the flap and is composed of a combination of part parallel to the fold lines of the lid and insertion flap and part that is not parallel to these fold lines. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a packaging box used for packaging cosmetics and the like.

Conventionally, in a packaging box having a front plate, a side plate, a back plate, a lid, a side flap formed at the end of the side plate, and an insertion flap formed at the end of the lid, the insertion flap and the side flap It is known to provide a lock function to the box by engaging the.
For example, in patent documents 1-6, the notch part is provided in the folding line vicinity with the cover part of an insertion flap, and the lock function which engages this notch part and a side flap is provided to the box.
However, these boxes have too strong lock strength, and the flap portion may be damaged when the lid is opened. In particular, many cosmetic boxes have high design properties, and it is desired to prevent the boxes from being damaged when the lid is opened in order to maintain the design properties.
On the other hand, Patent Document 7 proposes to provide a lock mechanism that reduces the lock strength by providing a convex portion or a concave portion in the vicinity of the folding line with the lid portion of the insertion flap. However, when assembling such a box, if the insertion flap part is folded by an automatic assembly machine (or by hand), the convex part or the concave part in the insertion flap is not folded at the folding line between the lid part and the insertion flap. It was difficult to bend the box accurately and reliably.

Japanese Utility Model Publication No. 63-21212 Japanese Utility Model Publication No. 63-134909 Japanese Utility Model Publication No. 6-25121 JP 2000-326955 A JP 2001-199435 A JP 2003-291944 A Japanese Utility Model Publication No. 6-42632

  It is an object of the present invention to provide a packaging box that has an appropriate locking function that is easy to open, and that can accurately and reliably form a box.

The inventor of the present invention paid attention to the arrangement and combination of the pressing portions provided on the insertion flap, and achieved the above-mentioned problem.
That is, the present invention is a packaging box having a front plate, a side plate, a back plate, a lid, a side flap formed at the end of the side plate and an insertion flap formed at the end of the lid, The side flap has a locking portion, the insertion flap has a pressing portion, and the pressing portion is disposed at a portion that can be engaged with the locking portion, and is a recess on the insertion flap surface side. And a convex portion on the back surface side of the insertion flap, and a combination of a portion parallel to the folding line between the lid portion and the insertion flap and a portion not parallel to the folding line. It is a packaging box.

  According to the present invention, it is possible to provide a packaging box that has an appropriate locking function that is easy to open, and that can accurately and reliably form a box.

It is a schematic perspective view which shows one embodiment of the packaging box of this invention, FIG.1 (b) is A-A 'sectional drawing of the cover part of Fig.1 (a). It is a schematic perspective view which shows the other embodiment of the packaging box of this invention. It is a schematic perspective view which shows the other embodiment of the packaging box of this invention. It is a schematic plan view which shows the aspect of the side flap in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part in the packaging box of this invention. It is the schematic of the insertion flap explaining the calculation method of the total length W of the part of a press part in the packaging box of this invention parallel to the folding line of a cover part and an insertion flap. It is a schematic perspective view which shows the packaging box of a comparative example.

The packaging box of the present invention is a packaging box having a front plate, a side plate, a back plate, a lid, a side flap formed at the end of the side plate, and an insertion flap formed at the end of the lid. The side flap has a locking portion, the insertion flap has a pressing portion, and the pressing portion is disposed at a position that can be engaged with the locking portion, on the insertion flap surface side. A concave portion and a convex portion on the back side of the insertion flap, and a combination of a portion that is parallel to the folding line between the lid portion and the insertion flap and a portion that is not parallel to the folding line. .
In the present invention, “being parallel to the folding line” means that the acute angle side of the angle intersecting with the folding line is 0 to 5 °, and hereinafter, the “part parallel to the folding line” is referred to as a parallel pressing portion. Further, “not parallel to the folding line” means that the acute angle side of the angle intersecting with the folding line is more than 5 ° and not more than 90 °, preferably 10 to 90 °, more preferably 20 to 90. °, particularly preferably 30 to 90 °. Hereinafter, the “part that is not parallel to the folding line” is referred to as a non-parallel pressing part.

Embodiments of the packaging box of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an embodiment of the packaging box of the present invention.
A packaging box 10 according to the first embodiment of the present invention shown in FIG. 1A includes a front plate 11, a side plate 12, a back plate 13, a lid portion 14, and side flaps formed on end portions of the side plate 12. 16 and an insertion flap 15 formed at the end of the lid portion 14, having a locking portion 16 a at the side end of the side flap 16, and having two pressing portions 20 on the insertion flap 15. The two pressing parts 20 are respectively a single parallel pressing part 20a parallel to the folding line 30 between the lid part 14 and the insertion flap 15, and the parallel pressing part 20a perpendicular to the parallel pressing part 20a and the folding line 30 from the parallel pressing part 20a. It is comprised from the two non-parallel press part 20b extended on the opposite side. Due to such a configuration of the pressing portion 20, one parallel pressing portion 20 a parallel to the folding line 30 is suitably engaged with the locking portion 16 a of the side flap 16, and an appropriate locking function that makes it easy to open the lid. In addition, the combination of one parallel pressing portion 20a and two non-parallel pressing portions 20b simultaneously increases the rigidity of both, making it difficult to bend in the direction parallel to the folding line 30. In the step of folding the insertion flap portion by hand), it is not bent by the pressing portion 20 in the insertion flap 15 by mistake, and the folding line 30 is accurately and reliably bent. At the same time, since the rigidity is increased, the shape of the pressing portion 20 is stably maintained. Therefore, even when the lid is repeatedly opened, an appropriate locking function that maintains the ease of opening is stably maintained. be able to.
In FIG. 1 (a), the pressing part 20 has one parallel pressing part 20a and two non-parallel pressing parts 20b, but each of the parallel pressing part 20a and the non-parallel pressing part 20b may have only one, One or both of them may be plural, or a large number of three or more.

  Further, the pressing portions 20 are disposed at two locations corresponding to the locking portions 16a of the two side flaps 16 on the left and right sides (that is, facing the locking portions 16a when engaged), and are respectively engaged with the locking portions 16a. It is arranged in a possible part. Here, the locking portion 16a is a side end portion on the front plate side of the side flap 16 from the side flap 16 end portion on the side plate 12 side to the separation portion 16b, and the separation portion 16b is a side flap. The side edge part of 16 refers to the side edge part on the front plate side of the side flap 16 that is separated from the front plate 11 by a larger amount than the total amount of the thickness of the insertion flap 15 and the convex part of the pressing part. The part which can be engaged means the part of the insertion flap 15 corresponding to the locking part 16a of the side flap 16 (that is, facing the locking part 16a when engaged). From the viewpoint of the pressing portion 20 engaging with the locking portion 16a, it is preferable that the pressing portion 20 is separated from the folding line 30 by the thickness of the side flap 16 or more.

FIG. 1B represents the AA ′ cross section in FIG. As shown in FIG. 1B, the pressing portion 20 includes a concave portion on the front surface side of the insertion flap 15 and a convex portion on the back surface side of the insertion flap 15. By pressing with an appropriate shape from the surface side of the insertion flap 15, the concave portion and the convex portion are simultaneously formed integrally. Since the locking portion 16a is on the back surface side of the insertion flap 15, it is important that a convex portion for engaging with the locking portion 16a exists on the back surface side of the insertion flap 15.
Moreover, the recessed part formed in the surface side of the insertion flap 15 has an effect which improves the designability when the packaging box 10 is opened.

  In the packaging box of the present invention, the parallel pressing part 20a of the pressing part 20 is arranged at a site where the locking part 16a can be engaged, and the non-parallel pressing part 20b is arranged at a site where the locking part 16a is not engaged. Preferably it is. This is because the automatic assembling machine (or manpower) does not accidentally bend the pressing portion 20 in the insertion flap 15, and the folding line 30 can be more accurately and reliably bent.

In the present invention, the parallel pressing portion 20a of the pressing portion 20 is preferably extended from the side end of the insertion flap 15 inward from the viewpoint of engagement with the locking portion 16a. Further, it is preferable that the inner side of the insertion flap 15 extends slightly further from the side end portion to the inner side from the viewpoint of making the folding line 30 to be bent more accurately and more reliably.
In addition, the parallel pressing portion 20a of the pressing portion according to the present invention is not only a straight line but also includes a broken line and / or a wavy curve whose center line is parallel to the folding line 30. The amplitude of the broken line and / or the wavy curve is preferably 3 times or less, more preferably 2 times or less, and particularly preferably 1.5 times or less the line width of the broken line and / or wavy curve. . When the amplitude is equal to the line width, a straight line is obtained.

  In the present invention, the non-parallel pressing portion 20b of the pressing portion 20 is not limited to a straight line and may be a curved line. This is because a curved line has a portion which is not parallel to the folding line. The “angle intersecting the curve and the folding line” is an angle on the acute side of the angle between the tangent and the folding line at the end of the curve on the side close to the “parallel to the folding line” portion of the pressing portion 20. To tell.

FIG. 2 is a schematic perspective view showing another embodiment of the packaging box 10 of the present invention. In FIG. 2, the pressing part 20 is composed of two parallel pressing parts 20a and three non-parallel pressing parts 20b perpendicular to them. Of the two parallel pressing portions 20a, one on the folding line 30 side is suitably engaged with the engaging portion 16a of the side flap 16, and exhibits an appropriate locking function that is easy to open. Further, the combination of the two parallel pressing portions 20a and the three non-parallel pressing portions 20b prevents the pressing portion 20 from being bent more appropriately. Further, since the three non-parallel pressing portions 20b are provided, the rigidity of the insertion flap 15 in the direction perpendicular to the folding line 30 is further increased, and bending at the parallel pressing portions 20a is difficult to occur.
As shown in FIG. 2, in the packaging box 10 of the present invention, if the opening / closing flap 40 is provided at the end of the lid portion 14 (the end on the insertion flap 16 side), the opening / closing flap 40 can be easily opened by lifting it with a finger. Since the lid can be opened and the opening of the lid becomes simple with one operation, the convenience of the simple locking mechanism of the present invention is further enhanced.
The opening / closing flap 40 can be easily manufactured simply by cutting the insertion flap 15 as shown in FIG.

  FIG. 3 is a schematic perspective view showing another embodiment of the packaging box 10 of the present invention. In FIG. 3, the pressing portion 20 is constituted by one continuous line, but parallel pressing portions 20 a that engage with both the locking portions 16 a of the two side flaps 16 are provided at both ends of the pressing portion 20. The two non-parallel pressing portions 20b are connected. Thus, when the width | variety of the front board 11 is narrow and the horizontal cross section of the packaging box 10 is near square, it is not necessary to provide the press part 20 according to the two latching | locking parts 16a, and one continuous one It may have a shape. In FIG. 3, the pressing portion 20 is formed in a V shape, but may be other characters or figures as long as it has the parallel pressing portion 20 a and the non-parallel pressing portion 20 b. In any case, when the packaging box 10 is opened, characters or figures pop up, so that an unexpected design effect is produced.

FIG. 4 is a schematic plan view showing an aspect of a side flap in the packaging box of the present invention. In FIG. 4A, the locking portion 16a is at an acute angle of about 1 to 5 degrees with the front plate 11 from the boundary portion between the front plate 11 and the side plate 12 (the side end portion on the front plate side of the side flap 16). It extends. The locking portion 16a is further separated from the front plate 11 in the middle to constitute a separation portion 16b.
In FIG. 4B, the locking portion 16a is maintained at a certain distance (about the thickness of the insertion flap 16) from the front plate 11 in a portion from the boundary portion between the front plate 11 and the side plate 12 to the separation portion 16b. Is formed.
In FIG. 4C, a second separation portion 16b ′ is further formed between the boundary portion between the front plate 11 and the side plate 12 and the locking portion 16a.
In either case, it is only necessary that the front plate 11 and the locking portion 16a are separated to such an extent that the insertion flap can be easily inserted into the packaging box 10 and can be engaged with the convex portion of the pressing portion 20.
Moreover, the back plate 13 and the side edge part by the side of the back plate of the side flap 16 may be gradually spaced apart at an acute angle of about 1 to 10 ° as necessary.

The arrangement of the parallel pressing part 20a and the non-parallel pressing part 20b of the pressing part 20 has the following relationship.
From the viewpoint of favoring the engagement between the parallel pressing portion 20a and the locking portion 16a, the non-parallel pressing portion 20b is desirably present at the position of the separation portion 16b or the second separation portion 16b ′, or the parallel pressing portion 20a. It is desirable that the non-parallel pressing part 20b does not extend to the side closer to the folding line 30 than the parallel pressing part 20a in the range where the engaging part 16a engages. This is because the engagement between the parallel pressing portion 20a and the locking portion 16a is hindered by the contact between the locking portion 16a and the non-parallel pressing portion 20b. From the viewpoint of reliable box formation, it is desirable that the non-parallel pressing portion 20b has a length beyond the parallel pressing portion 20a, starting from the side closer to the folding line 30 than the parallel pressing portion 20a. This is because the non-parallel pressing portion 20b crosses the parallel pressing portion 20a, thereby increasing the rigidity in the direction in which the folding line 30 is not parallel. In order to satisfy these two viewpoints, as shown in FIGS. 5 to 7 and 15, which will be described later, the non-parallel pressing portion 20b is formed inside the box (position corresponding to the separation portion 16b), and the non-parallel pressing portion 20b is parallel. It is preferable that the pressing portion 20 extending to the side closer to the folding line 30 than the pressing portion 20a is formed. On the other hand, when it has the non-parallel press part 20b extended to the folding line 30 side rather than the parallel press part 20a at the side edge part side of an insertion flap like FIG. What is necessary is just to provide 2nd separation part 16b 'in the position corresponding to.

  FIGS. 5-16 is a schematic expanded view of the cover part and insertion flap which show the other embodiment of the press part 20 in the packaging box 10 of this invention. 5 to 9 and 15, the parallel pressing portion 20 a of the pressing portion 20 is disposed at a portion where the locking portion 16 a can be engaged, and the non-parallel pressing portion 20 b of the pressing portion 20 is engaged with the locking portion 16 a. The case where it arrange | positions to the site | part which is not performed (for example, corresponding to the separation part 16b) is shown.

  Each of the pressing portions 20 shown in FIG. 5 includes one parallel pressing portion 20a extending from a starting point slightly inside the side end portion of the insertion flap 15, and one non-parallel pressing portion 20b perpendicular to the parallel pressing portion 20a. It consists of a combination. Here, the parallel pressing portion 20a corresponds to the locking portion 16a (that is, faces the locking portion 16a when engaged), and the non-parallel pressing portion 20b corresponds to the separation portion 16b (that is, when engaged). Therefore, an appropriate locking function that facilitates opening of the lid and a function of accurately and surely forming the box are highly compatible with each other.

  Each of the pressing portions 20 shown in FIG. 6 includes one parallel pressing portion 20a extending from a starting point slightly inside the side end portion of the insertion flap 15, and three non-parallel pressing portions 20b orthogonal to the parallel pressing portion 20a. And a combination. Each of the three non-parallel pressing portions 20b corresponds to the separation portion 16b, and the function of accurately and reliably forming the box is further enhanced.

  The pressing portion 20 shown in FIG. 7 intersects the parallel pressing portion 20a at an angle of about 60 ° with one parallel pressing portion 20a extending from a starting point slightly inside the side end of the insertion flap 15 and the folding line 30. It consists of a combination with one non-parallel pressing part 20b. The non-parallel pressing part 20b corresponds to the separation part 16b.

  The pressing part 20 shown in FIG. 8 has one parallel pressing part 20a extending from a starting point slightly inside the side end of the insertion flap 15, and one extending perpendicularly to the parallel pressing part 20a from the starting point of the parallel pressing part 20a. And a non-parallel pressing portion 20b. The non-parallel pressing portion 20b does not correspond to the separation portion 16b, but does not extend to the folding line 30 side than the parallel pressing portion 20a, and therefore does not affect the engagement between the parallel pressing portion 20a and the locking portion 16a.

  The pressing portion 20 shown in FIG. 9 is orthogonal to the parallel pressing portion 20a from one parallel pressing portion 20a extending from a starting point slightly inside the side end portion of the insertion flap 15, and from the starting point and the ending point of the parallel pressing portion 20a. It consists of a combination with two non-parallel pressing portions 20b that extend. The non-parallel pressing portion 20b does not correspond to the separation portion 16b, but does not extend to the folding line 30 side than the parallel pressing portion 20a, and therefore does not affect the engagement between the parallel pressing portion 20a and the locking portion 16a.

  10 to 14 and 16, the locking portion 16 a of the side flap 16, the separation portion 16 b, and the second separation portion 16 b ′ provided as necessary are arranged in parallel with the locking portion 16 a and the pressing portion 20. What is necessary is just to adjust so that 20a may engage. Thereby, the moderate lock function which is easy to open a lid | cover, and the function which shape | molds a box correctly and reliably can be exhibited suitably.

The pressing portion 20 shown in FIG. 10 is a combination of one parallel pressing portion 20a extending from a starting point slightly inside the side end portion of the insertion flap 15 and one non-parallel pressing portion 20b orthogonal to the parallel pressing portion 20a. Consists of.
The pressing portion 20 shown in FIG. 11 has one parallel pressing portion 20a extending from a slightly inner starting point of the side end portion of the insertion flap 15, and 1 orthogonal to the parallel pressing portion 20a and passing through the starting point of the parallel pressing portion 20a. It consists of a combination with the non-parallel pressing part 20b of a book.
The pressing portion 20 shown in FIG. 12 includes one parallel pressing portion 20a extending from a slightly inner starting point of the side end portion of the insertion flap 15, and a straight line that is orthogonal to the parallel pressing portion 20a and passes through the starting point of the parallel pressing portion 20a. And a combination of two straight non-parallel pressing portions 20b that are orthogonal to the parallel pressing portions 20a and pass through the end points of the parallel pressing portions 20a.

The pressing part 20 shown in FIG. 13 intersects with the parallel pressing part 20a at an angle of about 60 ° with one parallel pressing part 20a extending from a slightly inner starting point of the side end of the insertion flap 15. It consists of a combination with one non-parallel pressing part 20b.
The pressing portion 20 shown in FIG. 14 intersects with the parallel pressing portion 20a at an angle of about 60 ° with one parallel pressing portion 20a extending from the starting point slightly inside the side end of the insertion flap 15 and the folding line 30. It consists of a combination with two non-parallel pressing parts 20b.

The parallel pressing portion 20a and the non-parallel pressing portion 20b in the present invention may be separated as long as the object of the present invention is not impaired.
The pressing part 20 according to the present invention shown in FIG. 15 is a modification of the pressing part 20 according to the present invention shown in FIG. 5, and the parallel pressing part 20a and the non-parallel pressing part 20b are separated from each other.
The pressing part 20 according to the present invention shown in FIG. 16 is a modification of the pressing part 20 according to the present invention shown in FIG. 11, and the parallel pressing part 20a and the non-parallel pressing part 20b are similarly spaced apart.
The width at which the parallel pressing portion 20a and the non-parallel pressing portion 20b are separated is preferably within 5 times the line width of the non-parallel pressing portion 20b from the viewpoint of not impairing the object of the present invention. More preferably, it is particularly preferably within the same magnification.

FIG. 17 is a schematic view of the insertion flap 15 for explaining a method of calculating the total length W of the parallel pressing portions 20a of the pressing portion 20 of the packaging box 10 of the present invention. As shown in FIG. 17, the total length W of the parallel pressing parts 20a of the pressing part 20 is represented by the sum of the lengths W1 and W2 of the parallel pressing parts 20a when there are two pressing parts 20. That is, W = W1 + W2. Here, as in the example of FIG. 2, when there are a plurality of parallel pressing portions 20a of the pressing portion 20 per one portion of the locking portion 16a, the side that engages with the locking portion 16a (the folding line 30 in FIG. 2). The total length of the parallel pressing portions 20a on the side close to () is used. When the length of the insertion flap 15 in the direction parallel to the folding line 30 is L, the total length W and the length L preferably have the relationship of the following formula (1), and the following formula (2) It is more preferable to have this relationship, and it is particularly preferable to have the relationship of the following formula (3).
W / L ≦ 1 (1)
W / L ≦ 1/2 (2)
W / L ≦ 1/3 (3)
If (L / W) is 1 or less, it is preferably equal to or shorter than the folding line 30 and the risk of molding defects is reduced, and if (L / W) is 1/2 or less, the same reason is obtained. More preferred.

The pressing part 20 according to the present invention shown in FIGS. 1 to 3 and 5 to 16 described above has a pressing part 20 that is a combination of a parallel pressing part 20a and a non-parallel pressing part 20b. The parallel pressing portion 20a is disposed at a portion that can be engaged with the locking portion 16a, and the non-parallel pressing portion 20b of the pressing portion 20 is disposed at a portion that does not engage with the locking portion 16a. 20a engages with the locking portion 16a and exhibits an appropriate locking function that is easy to open, and the combination of the parallel pressing portion 20a and the non-parallel pressing portion 20b allows the insertion flap 15 to be perpendicular to the folding line 30. Rigidity is increased, and it is preferable that it is difficult to bend in a direction parallel to the folding line 30.
Moreover, since the press part 20 which concerns on this invention shown to FIGS. 1-3 and 5-16 all has the straight line which comprises or its edge part is spaced apart from the folding line 30 about the thickness of the side flap 16, or more. The lock mechanism functions reliably.

  FIG. 18 is a schematic perspective view showing a packaging box of a comparative example. As shown in FIG. 18, the packaging box 50 of the comparative example includes a front plate 51, a side plate 52, a back plate (not shown), a lid portion 54, a side flap 56 and a lid portion 54 formed at the end of the side plate 52. The insertion flap 55 is formed at the end of the side flap 56, and the side flap 56 has a locking portion 56a. However, since the insertion flap 55 has a notch 60, the locking portion 56a is cut off when the lid is opened. If the engagement with the notch 60 is not released well, and the lid is opened with the engagement, the insertion flap 55 and / or the side flap 56 may be damaged. There is a risk of hindering use.

Examples of the material of the packaging box of the present invention include packaging paper such as paperboard and kraft paper, synthetic paper, and plastic sheet. Examples of the plastic sheet include polyethylene terephthalate or a copolymer thereof, polypropylene or a copolymer thereof, polystyrene or a copolymer thereof, or a laminate thereof. In consideration of the ease of exhibiting the effects of the present invention, easy processability, and the like, paper such as paperboard and kraft paper, and synthetic paper are preferred.
In order to enhance the aesthetics of the packaging box, it is preferable to decorate the surface of the packaging box by surface deposition using metal, metal oxide, silicon oxide or the like, lamination of metal foil or the like, surface coating of resin or the like.

  The packaging box of the present invention is a product in containers such as various cylindrical bodies, polygonal cylinders, bottles, etc., and cosmetic products such as lipsticks, perfumes, nail polish, treatments, hair color, hair care products such as hair nail polish, etc. It is suitably used as a packaging box that accommodates.

DESCRIPTION OF SYMBOLS 10 Packing box 11 of this invention Front plate 12 Side plate 13 Back plate 14 Cover part 15 Insertion flap 16 Side flap 16a Locking part 16b Separation part 16b '2nd separation part 20 Press part 20a Parallel press part 20b Non-parallel press part 30 Folding line 40 between lid and insertion flap 40 Opening / closing flap 50 Packaging box 51 of comparative example Front plate 52 Side plate 54 Lid portion 55 Insertion flap 56 Side flap 56a Locking portion 60 Notch

Claims (4)

  A packaging box having a front plate, a side plate, a back plate, a lid, a side flap formed at an end of the side plate, and an insertion flap formed at an end of the lid, the side of the side flap The insertion flap has a pressing portion, and the pressing portion is disposed at a portion engageable with the locking portion, and the concave portion on the insertion flap surface side and the insertion flap rear surface side And a combination of a portion parallel to the folding line between the lid and the insertion flap and a portion not parallel to the folding line.   A portion of the pressing portion that is parallel to the folding line is disposed at a portion that can be engaged with the locking portion, and a portion of the pressing portion that is not parallel to the folding line is not engaged with the locking portion. The packaging box according to claim 1, wherein the packaging box is disposed at a site. The total length W of the portion of the pressing portion that is parallel to the fold line and the length L of the insertion flap in the fold line direction have a relationship of Formula (1). Packaging box as described in.
W / L ≦ 1 (1)   The packaging box in any one of Claims 1-3 which has an opening / closing flap in the edge part of the said cover part.

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