JPH0239942Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field This invention relates to a packaging box that can be easily assembled and sealed.

(2) Prior Art Conventionally, as shown in FIGS. 4 and 5, as a packaging box that can be easily assembled and sealed, side walls 2 are connected to both edges of a bottom wall 1, and side walls are attached to both edges. A rectangular lower flap 3 shorter in length than 2 is installed in a row, and the side wall 2
Connecting pieces 4 are connected to both end edges of the flap, and the lower flap 3 and the connecting piece 4 are fixed together.A lid flap 5 is connected to the side edge of one side wall 2, and the lower flap 3 is connected to both end edges of the lid flap 5. It consists of an upper flap 6 that engages to form an end wall, and the upper flap 6 has an insertion tongue piece 7 protruding from the center, and the tongue piece 7 is inserted into the inside of the lower flap 3.
It was popular to insert the paper and seal it.

(3) Problems to be solved by the invention However, in this packaging box, the tongue piece 7 must be bent inside the lower flap 3 by the thickness of the material, and the bend line l is formed at the base of the tongue piece 7. It is easy to stick to the lid, and when the fold line 1 is formed, the locking ability of the tongue piece 7 becomes loose and a gap is created, which makes it easy for the lid flap 5 to come off and open.

(4) Means for solving the problem In order to solve the above-mentioned problems, this invention provides abutting edges with a drop at both ends of the lower and upper flaps that engage, and also provides abutment edges with a difference in the center part. An overlapping portion is provided, and one abutting edge close to the side wall to which the lid flap is connected is located at the upper edge of the overlapping portion, and the other abutting edge is located at the lower edge of the overlapping portion.

(5) Function When the lid flap is closed, the end wall formed by the lower flap that connects to the bottom wall and the upper flap that connects to the lid flap does not have a protruding piece such as a tongue piece, so a fold line is created at the overlapped part. The lid flap is securely locked in such a way that it does not come off easily. In addition, when sealing, when the lid flap is closed by overlapping the inside of the top flap with the outside of the connecting piece connected to the other side wall, the approximately center portion of the top flap and the center portion of the bottom flap flex with each other. Since it polymerizes, it can be easily sealed.

(6) Embodiment Figures 1 to 3 show examples of this invention, and this packaging box is assembled from a board (see Figure 2) cut from cardboard or other thick paper. , rectangular side walls 2 are connected to both side edges of the square bottom wall 1, lower flaps 3 whose height is shorter than the side walls 2 are connected to both end edges of the bottom wall 1, and small connecting pieces 4 are connected to both end edges of the side wall 2. A lid flap 5 having the same shape as the bottom wall 1 is connected to the outer edge of one side wall 2 via a fold line 8 to fix the lower flap 3 and the connecting piece 4. An upper flap 6 that partially abuts and partially overlaps the lower flap 3 to form an end wall is provided in series, and a narrow folding piece 9 is provided in series on the outer edge of the other side wall 2. The flap 3 has an abutment edge that abuts the upper flap 6 at both ends, and a notch is provided at the end near the side wall 2 where the folding piece 9 is connected to form a lower abutment edge 12. An upper butting edge 10 is formed at the portion,
An extension of the upper abutment edge 10 and an inclined edge 11 in the center part.
An overlapping portion 13 is formed by this.

In addition, the upper flap 6 has lower flaps 3 at both ends.
A notch is provided at the end near the fold line 8 to form an upper abutting edge 10', and a lower abutting edge 12' is formed at the other end. An overlapping portion 13' is formed by the extension of the lower abutting edge 12' and the inclined edge 11'. Therefore, the connecting piece 4 and the lower flap 3 are fixed with an adhesive or the like (numeral 14 indicates the surface fixed by the adhesive or the like), and the lid flap 5 is rotated via the fold line 8, and at this time, the upper flap 6 is rotated. When the inner side is overlapped with the outer side of the connecting piece 4 of the side wall 2 where the folding pieces 9 are connected, the upper flap 6 and the lower flap 3 come into contact at both ends with a difference in height, overlap in the center, and are sealed. .

Note that the inclined edge 11 of the lower flap is located at the overlapped portion 13.
The slanted edge 11' of the upper flap 6 is cut diagonally so that the corners of the upper flap 6 do not protrude.
When engaging the upper flap 6 with the lower abutting edge 12'
is in a superposed state on the connecting piece 4, and then the superposed part 1
The lower end of the flap 3' is in contact with and overlaps the upper end of the flexible overlapping part 13, which is approximately at the center of the lower flap 3, so that smooth engagement can be achieved by kneading.

In addition, in the case of this embodiment, the triple structure part A is formed on the end wall by the lower flap 3, the upper flap 6, and the connecting piece 4.
(See FIG. 3), but this allows the upper flap 6 to be sandwiched between the lower flap 3 and the connecting piece 4, thereby making the engagement more secure. Note that this triple structure portion A is not necessarily necessary, and may be appropriately selected depending on conditions such as the size of the packaging box and the thickness of the material.

(7) Effects As mentioned above, according to the packaging box according to this invention, unlike conventional products, the tongue piece of the top flap does not have a bend, and when sealing, the top flap is folded into the side wall where the fold pieces are connected. It is only necessary to close the lid flap by stacking it on the connecting piece of the lid, and since the upper flap and the lower flap are locked from approximately the center of the overlapping part by mutual bending, the locking is reliable and the sealing is easy. It has the advantage of being easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention;
FIG. 2 is a developed view of the same as the above, FIG. 3 is a side view of the main part showing the same sealed state, and FIGS. 4 and 5 are a perspective view showing the conventional product and a side view of the main part showing the sealed state. 1...bottom wall, 2...side wall, 3...bottom flap,
4... Connecting piece, 5... Lid flap, 6... Upper flap, 10, 10'... Upper butting edge, 11, 1
1'...Slanted edge, 12,12'...Lower abutting edge, 1
3,13'...polymerization part.

Claims (1)

[Scope of utility model registration request] Side walls are connected to both side edges of the bottom wall, lower flaps shorter than the side walls are connected to both end edges, connecting pieces are connected to both ends of the side walls, and the lower flaps and the connecting pieces are fixed. A packaging box in which a lid flap facing the bottom wall is connected to the side edge of one side wall, and an upper flap that engages with the lower flap to form an end wall is connected to both end edges of the lid flap. , the lower flap and the upper flap are provided with abutting edges with a difference in height at both ends, and an overlapping part is provided in the center, and one of the abutting edges close to the side wall to which the lid flap is connected is connected to the upper edge of the overlapping part. A packaging box characterized in that the other abutting edge is located at the lower edge of the overlapping part.