JP3100583B2 - Packaging box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box, and more particularly, to a packaging box which is closed by a lid flap connected to a side wall plate, and the contents are taken out after the lid flap is opened. .

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Utility Model Publication No. Hei 4-15609, there is known a packaging box in which a lid flap can be locked on a side surface of a side wall plate to maintain an open state. The above-mentioned conventional packaging box is provided with two cuts from the side wall plate to the lid flap, and after folding the lid flap to the outer surface side of the side wall plate, the portion sandwiched by the two cuts is outwardly formed. Or, by falling inward, the fallen portion is locked between the two cuts, and the lid flap is maintained in a state of being folded back to the outer surface side of the side wall plate. Thereby, when taking out the contents from the inside of the packaging box, the work of taking out the contents can be performed smoothly without the lid flap becoming an obstacle.

However, according to the above-mentioned conventional packaging box, when the interval between the two cuts is relatively narrow enough to allow one finger to enter, the portion sandwiched between the two cuts is knocked down in one behavior. For example, when the interval between the two cuts is set relatively wide so that the index book can be inserted, a portion sandwiched between the two cuts is connected to the lower ends of both cuts. There is an inconvenience that it is difficult to defeat in a single motion along the line. That is, when the interval between the two cuts is relatively wide, if the portion sandwiched between the two cuts is fallen down casually, the portion is not necessarily bent along the line connecting the lower ends of both cuts. Instead, for example, there is a case where the line is bent from a line connecting the lower end of one cut and the center position of the other cut.
In such a bent state, the folded part is not securely locked between the two cuts, and there is a disadvantage that the lid flap in the open state cannot be prevented from returning.

On the other hand, in this type of packaging box, when the weight of the contents is relatively heavy, the contents are gripped by the upper edge of the side wall plate with the lid flap folded back to the outer surface side of the side wall plate. Is preferably formed. In the above-mentioned conventional packaging box, the open portion can be formed by folding the portion sandwiched between the two cuts, but as described above, the interval between the two cuts is indexed. If the opening is relatively wide as described above, it is difficult to correctly incline the portion sandwiched between the two cuts, and there is a disadvantage that the opening cannot be formed smoothly.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention not only ensures that the lid flap is kept open, but also provides a sufficient space for easily removing the contents. It is an object of the present invention to provide a packaging box which can easily and surely form an opening having an opening on an edge portion of a side wall with a lid flap opened.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a packaging box having a lid flap connected to a side wall plate through a fold line at a predetermined distance from the fold line. A first breakable portion extending to the lid flap along the fold line; and a second breakable portion extending to the side wall plate along the fold line at a predetermined interval from the fold line. A substantially U-shaped breakable piece formed by a breakable portion and a third breakable portion extending from the tip of the first breakable portion to the tip of the second breakable portion crossing the fold line is provided, When the lid flap is folded back and overlapped on the outer surface side of the side wall plate via the fold line, the broken free piece folded in half via the fold line is broken through each breakable portion and the side wall plate is broken. To the outside so that the contents can be taken out. And forming a section on the end of the side wall plate.

[0007] According to the packaging box of the present invention, the breakable piece is folded back onto the outer surface side of the side wall plate via the fold line and then polymerized, and then the side wall is folded in two. Released toward the outside of the board. Thereby, it is possible to prevent the lid flap folded back on the outer surface side of the side wall plate from returning in the closing direction and maintain the open state of the packaging box, and at the same time, the side wall plate from which the broken free pieces are released. An opening is formed at the edge of the opening, and the contents can be easily taken out through the opening.

Further, the breakable piece is formed by a first breakable portion, a second breakable portion and a third breakable portion which are substantially continuous in a U-shape, and are released in a folded state. In some cases, the rupture is first started from the third rupturable portion, and then the first rupturable portion and the second rupturable portion are overlapped and continuously broken in one behavior. Thereby, in order to easily form the open portion so that the contents can be easily grasped by fingers, even if the shape of the breakable piece is provided relatively large, each breakable portion can be surely operated in one behavior even if the shape of the breakable piece is provided relatively large. And the contents can be taken out smoothly.

In the present invention, the distance between the second breakable portion and the fold line is larger than the distance between the first breakable portion and the fold line. When the broken free piece folded in half is broken through each breakable part and released toward the outside of the side wall plate, a break end by a second breakable part formed in the broken free piece The edge may be frictionally engaged with a break edge formed by the first breakable portion formed on the lid flap and exposed to the opening.

[0010] When the breakable piece is folded in two with the folding of the lid flap, the first breakable portion and the second breakable portion are positioned adjacent to each other. The distance between the second rupturable portion and the fold line is larger than the distance between the first rupturable portion and the fold line. The break edge of the breakable piece is located below the break edge of the first breakable portion on the lid flap side. Thereby, when the breakable piece is released, the breakable edge formed by the second breakable part formed on the breakable piece and the first breakable part formed on the lid flap and exposed to the open part are formed. Interference with the fracture edge causes friction, and the release state of the fracture release piece is reliably maintained, so that the open state of the lid flap can be reliably maintained.

At this time, the second rupturable portion is provided so as to be inclined from the front end to the rear end continuous with the third rupturable portion so that the distance between the second rupturable portion and the fold line gradually increases. Is preferred. Thereby, the friction between the breaking edge of the second breakable portion formed on the breakable piece and the breaking edge of the first breakable portion formed on the lid flap and exposed to the open portion is broken. At the time of the start of the release of the loose pieces, the small
The breakable portion can be easily released by easily breaking the distal end portion of the breakable portion and the second breakable portion. On the other hand, as the fracture of the first rupturable portion and the second rupturable portion progresses toward the rear end, the friction increases, and the released state of the fractured free piece is securely maintained when the fractured free piece is completely released. can do.

Further, in the present invention, the first breakable portion has a projection formed on the breaking edge on the lid flap side to lock the breaking free piece when the breaking free piece is released. And a protrusion forming portion.

[0013] Since the breakable piece is released in a folded state through the fold line, the breakable edge of the breakable piece which is broken from the side wall plate by breaking the second breakable portion is The first breakable portion is broken and passes over a break edge formed on the lid flap. The protrusion is
The first fractured when the fractured loose pieces are released
Since it is formed by the projection forming portion of the breakable portion, it protrudes to the breaking edge formed on the lid flap. Thereby, the break edge of the breakable piece released from the side wall plate passing over the break edge formed on the lid flap is stopped by the protrusion after climbing over the protrusion. As a result, the return of the broken free piece is restricted, and the separated state of the broken free piece can be reliably maintained.

Further, in the present invention, the breakable piece has another fold line extending in a direction perpendicular to the fold line between a rear end of the first breakable portion and the fold line. It is characterized by.

[0015] That is, the other fold line is located along the rear edge of the broken free piece on the lid flap side when the broken free piece is folded in two with the folding of the lid flap. . By providing the other fold line, it is possible to reliably guide the bending along the rear edge of the broken free piece when releasing the broken free piece, and to smoothly release the broken free piece. It can be carried out.

[0016]

An embodiment of the present invention will be described with reference to the drawings. 1 is an explanatory perspective view showing the packaging box of the present embodiment, FIG. 2 is a development view of the packaging box of FIG. 1, FIG. 3 is an explanatory view showing an enlarged main part, and FIG. FIG. 5 is an explanatory view showing an opening operation of the packaging box of the present embodiment.

As shown in FIG. 1, the packaging box 1 of the present embodiment is formed in a substantially rectangular parallelepiped shape, and contains therein a content X (see FIG. 5). The content X in FIG. 5 shows, for example, a case where a plurality of cuboid-shaped appearances in which six beverage cans are collected in one pack are stored, but not shown, May be directly stored.

As shown in FIG. 2, the packaging box 1 is formed by folding a corrugated paperboard 2 formed by punching into a substantially rectangular shape. The corrugated paperboard 2 is connected to each other in the left-right direction via fold lines a, b, c.
One side wall plate 3,4,5,6 and each side wall plate 3,4,5,6
And lid flaps 7, 8, 9, 10 connected to the upper and lower edges via fold lines d, e, f, g, respectively, and a fold line h at the left edge of the side wall plate 3 at the left end in the figure. It is constituted by an adhesive piece 11 provided continuously.

A pair of the side wall plates 4, 6 and each side wall plate 4, 6
On the lid flaps 8 and 10, breakable pieces 12 are formed. As shown in FIG. 3A, the breakable piece 12 includes a first breakable portion 13 extending along the fold lines e and g on the lid flaps 8 and 10; 1
3, a second breakable portion 14 extending along the fold lines e and g on the side wall plates 4 and 6, and a first breakable portion 13
And a third rupturable portion 15 which intersects the fold lines e and g to reach the distal end of the second rupturable portion 14 to form a substantially U-shape.

As shown in FIG. 3A, the first breakable portion 13 includes the side wall plates 4, 6 and the lid flaps 8, 1.
In the vicinity of the rear end of the first breakable portion 13 (the third breakable portion 15
(A position on the opposite side from the above), a projection forming portion 16 is provided. As will be described later in detail, when the first breakable portion 13 is broken and the breakable piece 12 is released, the protrusion forming portion 16 has a protrusion 17 (see FIG. 4) on the broken edge on the lid flaps 8 and 10 side. ). Further, as shown in FIG. 3B, a fold that guides the bending of the breakable piece 12 that is folded in two when the lid flaps 8 and 10 are folded back is provided at the rear end of the first breakable portion 13. An eye line i is formed.

Further, the second breakable portion 14 is formed as shown in FIG.
As shown in (a), the distance y from the fold lines e and g at the boundaries between the side wall plates 4 and 6 and the lid flaps 8 and 10 is larger than the distance z of the first breakable portion 13. Have been.
Further, the second breakable portion 14 is provided so as to be gradually inclined away from the fold lines e and g from the front end to the rear end continuous with the third breakable portion 15. This allows
As shown in FIG. 3 (b), when the lid flaps 8 and 10 are folded back so that the breakable piece 12 is folded in two, the second breakable portion 14 is connected to the first breakable portion 1.
3 is located below. As will be described later in detail, as shown in FIG.
Is released, the breaking edge 18 of the first breakable portion 13 formed on the lid flaps 8 and 10 side and the breaking edge of the second breakable portion 14 formed on the breakable piece 12 1
9 interfere with each other to enable frictional engagement. Further, as shown in FIG. 4, when the broken free pieces 12 are released while the lid flaps 8 and 10 are folded back,
An opening 20 is formed at a position where the breakable piece 12 is removed.

First, the packaging box 1 having the above-described configuration is shown in FIG.
After the side walls 3, 4, 5, and 6 are bent at right angles to each other through the fold lines a, b, and c of the corrugated paperboard 2, the adhesive piece 11 is bonded to the inner surface of the right side wall 6 A quadrangular prism-shaped body is formed by adhering through an agent, and the upper and lower lid flaps 7, 8, 9, and 10 are horizontally bent inward to close the body, as shown in FIG. The packaging box 1 can be formed.

Next, the operation of opening the packaging box 1 and taking out the contents X according to the present embodiment will be described. First, from the state shown in FIG.
8, 9, 10 are opened and the packaging box 1 is opened. Then
As shown in FIG. 5, the lid flaps 8 and 10 are
Then, as shown in FIG. 4, the broken free pieces 12 are released and bent to the outside of the side wall plates 4 and 6 at right angles. At this time, the breakable piece 12 is folded in two as shown in FIG. 3B because the lid flaps 8 and 10 are folded back to the outer surfaces of the side walls 4 and 6. Then, as shown in FIG.
To the first breakable portion 13, the third breakable portion 15, and the second
It is released by breaking along the breakable portion 14. The first breakable portion 13, the third breakable portion 15, and the second
Since the breakable portions 14 are continuous with each other, the breakable pieces 12 can be reliably released in one behavior by pulling the breakable release pieces 12 outward.

When the breakable piece 12 is released and bent outward at right angles to the side walls 4, 6, the bending is reliably guided by the fold line i (see FIG. 3). Further, as shown in FIG. 3A, it is preferable that no fold line is provided on the rear end side of the second breakable portion 14.
This makes it easy to bend the breakable pieces 12,
This is because the strength of the bent portion may be reduced, and the broken free piece 12 may not be able to be reliably maintained in a state of being bent at a right angle. Although the present invention is not shown, when the bending stiffness of the corrugated paperboard 2 as the material of the packaging box 1 is extremely large, the first breakable portion is given priority by giving priority to the ease of bending of the breakable piece 12. Needless to say, this does not prevent the provision of a fold line at the rear end of the second breakable portion 14 following the fold line i at the rear end of the thirteen.

Further, when the released breakable piece 12 is bent outward of the side wall plates 4 and 6, the breakable edge 18 of the first breakable portion 13 formed on the lid flaps 8 and 10 side.
The second breakable portion 1 formed on the breakable piece 12
4 and frictionally engaged with each other by sliding contact with each other.
2 can be performed.

When the breakable piece 12 is bent at right angles to the outside of the side wall plates 4 and 6, the first breakable portion 13 is broken as shown in FIG. The projections 17 formed by the breaking loose pieces 12
And the broken free piece 12 can be reliably maintained in a state of being bent at a right angle.

As shown in FIG. 5, the lid flaps 8, 1 are provided by the broken loose pieces 12 bent as described above.
The state where O is superimposed on the outer surface side of the side wall plates 4 and 6 is reliably maintained, the lid flaps 8 and 10 are prevented from obstructing, and the contents X can be taken out. Moreover,
As shown in FIG. 5, an open portion 20 is formed at the upper end portion of the side wall plates 4 and 6 over a relatively wide range due to the release of the breakable pieces 12, and the contents are opened through the open portion 20. The work of taking out the contents X by gripping X can be performed extremely easily and smoothly.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing a packaging box according to an embodiment of the present invention.

FIG. 2 is a development view of the packaging box of FIG. 1;

FIG. 3 is an explanatory diagram showing a main part in an enlarged manner.

FIG. 4 is an explanatory view showing the function of a broken piece.

FIG. 5 is an explanatory diagram showing an opening operation of the packaging box of the embodiment.

[Explanation of symbols]

1: packaging box, 4, 6: side wall plate, 8, 10: lid flap,
12: Breakable piece, 13: First breakable portion, 14: Second
Breakable portion, 15: Third breakable portion, 16: Projection forming portion, 17: Projection, 20: Open portion, e, g: Fold line, i ...
Other fold lines.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 7-33830 (JP, U) JP-A 62-48924 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 5/00-5/76

Claims (5)

(57) [Claims] 1. A packaging box provided with a lid flap connected to a side wall plate via a fold line, wherein the cover box extends along the fold line along the fold line at a predetermined interval from the fold line. A first rupturable portion, a second rupturable portion extending to the side wall plate along the fold line at a predetermined interval from the fold line, and a fold line from a tip of the first rupturable portion. A substantially U-shaped breakable free piece formed by a third breakable portion that intersects with the third breakable portion and crosses the lid flap on the outer surface side of the side wall plate via the fold line. When folded and polymerized, the broken free piece folded in half via the fold line is broken through each breakable portion and released toward the outside of the side wall plate, and the contents can be taken out. Characterized in that an opening portion to be formed is formed at an end of the side wall plate. 2. The distance between the second rupturable portion and the fold line is greater than the distance between the first rupturable portion and the fold line. When the ruptured loose piece is broken through each rupturable portion and released toward the outside of the side wall plate, a rupture edge by a second rupturable portion formed on the rupture free piece is provided. 2. The packaging box according to claim 1, wherein a breakable edge formed by the first breakable portion formed on the lid flap and exposed to the open portion frictionally engages. 3. The second rupturable portion is provided so as to be inclined from the front end to the rear end continuous with the third rupturable portion so that the distance between the second rupturable portion and the fold line gradually increases. 3. The packaging box according to claim 2, wherein: 4. The projection forming portion, wherein the first breakable portion is formed with a projection which projects to a breaking edge on the lid flap side and locks the breaking free piece when the breaking free piece is released. The packaging box according to any one of claims 1 to 3, further comprising: 5. The breakable piece has another fold line extending in a direction perpendicular to the fold line between a rear end of the first rupturable portion and the fold line. Claim 1
A packaging box according to any one of claims 1 to 4.