JPH0239932Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to the improvement of packaging containers, and more specifically, provides a packaging container that is highly liquid resistant, has strong bonding strength at the corners, and is easy to assemble. The purpose is to

(Prior Art) There are many types of packaging container structures, but one that improves the bonding strength at the corner portion is disclosed in Japanese Utility Model Publication No. 46-20799, for example.

This uses a mount coated with a thermoplastic synthetic resin, and when assembling this into a dish-shaped container, the folded corner portions are heated and fused to bond.

Also known is the one disclosed in Japanese Utility Model Publication No. 53-5539.

This is true for containers where the top plate is connected to the side plate.
A folding piece that is folded into the container along the radial diagonal line is provided at the corner between the side plates around the bottom plate, and a frame plate that is folded into a rectangular tube shape, a folding plate, and an adhesive plate are successively installed on the top surface to form a frame. A notch into which both ends of the picture frame can fit is provided on the upper edge of the folding piece adjacent to each of the side plate and the other side plate, and the length of the folding plate is made shorter than the side plate by an amount that allows the folding piece to fit. By forming the corners, the contact surface with the top plate at the corners is widened, no gaps are formed, and the reinforcing strength is increased.

Furthermore, the one disclosed in Japanese Utility Model Publication No. 57-3931 is also known. When making a rectangular paper box, a small flap is provided at the upper end of the fold of each delta flap that is folded in half and folded inward, and the above-mentioned fold is attached to this small flap. By providing a small equilateral triangular cutout with the eye as the center of the base and fixing the assembly by fitting the top end of the corner of the paper box into this cutout, it can be easily assembled without gluing. This is how it was done.

(Problems to be solved with the invention) However, in the above-mentioned known art,
In the case of Utility Model Publication No. 46-20799, in order to fold the corner flap and completely heat-fuse the part, it is necessary to apply resin treatment not only to the inner surface but also to the outer surface of the mount, or to fold the valley of the corner flap. It is necessary to separately apply adhesive to the surface, and it is also necessary to coat the mount with a considerable amount of thermoplastic synthetic resin, and it is uneconomical to coat a large amount of resin over the entire surface of the mount in order to bond the corners. In addition, it is difficult to apply resin coating only to the planned corners of the mount, and in general, it is practically difficult to completely heat-fuse the corners, and problems tend to occur in terms of strength.

Also, Jitko No. 53-5539 or Jitko No. 57-3931
In all of the above-mentioned products, the structure of the corner flap is complicated and unstable, and furthermore, the folding lock of the corner flap cannot be easily released when necessary.

(Means for Solving the Problems) The present invention was devised after various studies in order to solve the above-mentioned problems with packaging containers. Standing walls such as the front plate, rear plate, left and right side plates, etc. provided, a cover plate extending to the edge of the rear plate, and a folding corner flap with two sides connected between each adjacent rising wall. , an engaging tongue provided on one side of the folding line provided on the radial diagonal of each folding corner flap, and each rising wall continuous to the other side of the folding line of each folding corner flap. The present invention relates to a structure of a packaging container in which the engaging tongue piece is engaged with each notch groove of a container blank, which is formed of a notch groove provided at a position corresponding to the engaging tongue piece.

(Example) Below, the specific content of the present invention will be explained based on an illustrated example. 1 indicates a rectangular bottom plate, and one side of the bottom plate 1 has a front side through a broken line a. On the other side, a rear plate 3, a top plate 4, and a front abutment plate 5 are connected to each other via fold lines b, c, and d.

Furthermore, on both the left and right sides in the width direction of the bottom plate 1, there are broken lines e and f.
The left and right side plates 6 and 7 are connected to each other via the side plates 6 and 7, and the corner portions of the side plates 6 and 7 and the adjacent front plate 2 and rear plate 3 are marked with fold lines i and k when the box is assembled. , j, l, o, m, p, n.
0, 11, 12, and 13 are provided.

Corner flaps 10 to 13 are each bottom plate 1
Fold lines q, r, on the radial diagonal centered on
s, t are provided, and an engaging tongue piece 10a facing outward on one side from each of the folding lines q to t.
11a, 12a, and 13a are arranged in series, and side plates 6, which constitute each rising wall, are arranged in series on the other side from the folding line of each folding corner flap.
Each of the above-mentioned engaging tongue pieces 10a to 13 is provided on the outer edge portion of 7.
Notch grooves 6a, 6b at positions corresponding to a, respectively.
and 7a, 7b are provided.

It is preferable that the engaging tongue piece and the notch groove have a shape that allows easy locking and prevents inadvertent release. In the illustrated example, the engaging tongue piece is formed in a T-shape, and the notch groove is formed in a trapezoidal shape. The neck of the T-shaped engagement tongue fits into the notched groove, and the outer edge of the notched groove is narrow, so that the engagement is maintained. Incidentally, the settings of the above-mentioned engagement tongue piece and notch groove can also be reversed.
In this case, a notch groove is provided on the edge of the corner flap symmetrical about the fold line, and a tongue piece is provided on the corresponding edge of the side plate.

Furthermore, on both the left and right sides of the top plate 4 in the width direction, there are fold lines g and h.
The lid side plates 8 and 9 are connected to each other via the lid side plate 8, and one of the lid side plates 8 is provided with a zipper 14.

The above-mentioned blank has its upper surface coated with resin or impregnated with resin to provide sufficient liquid resistance, and the corner flaps 10 to 13 are formed around the bottom plate 1, and the fold line q,
The front plate 2 is folded inward along r, s, and t.
The rear plate 3 and the left and right side plates 6 and 7 are erected along fold lines a, b, e, and f, respectively (see FIG. 2A).

At the point where the fold lines i and k, j and l, o and m, and p and n substantially overlap, each of the engaging tongues 10a to 13a is folded back to the outside, and the corresponding notch grooves 6a,
6b and 7a, 7b (second
(See Figure B).

Furthermore, the front plate 5 and the lid side plates 8 and 9 are bent in the direction of the bottom plate 1 along the fold lines d, g, and h, and if necessary, adhesive is applied to the respective edges, and then the front plate 2 and the side plates are folded. The packaging container of the present invention is obtained by laminating and adhering the outer surfaces of 6 and 7 (see FIG. 2C).

In this case, when bonding the lid side plate 8 by polymerization, care should be taken to apply the adhesive only to the band-shaped portion along the zipper 14 in consideration of opening.

(Function) In the configuration of the above-described embodiment, if the top plate 4 is opened by pinching the front abutment plate 5, the accommodation portion centered on the bottom plate 1 is opened, and the engaging tongue pieces 10a to 10 are opened as necessary.
By removing 13a from the cutout grooves 6a, 6b and 7a, 7b, it can be easily disassembled into the state shown in FIG. 2A.

Furthermore, when the front abutment plate 5 and the side plates 8 and 9 are bonded, the part of the side plate 8 closer to the fold line g is opened along the zipper 14 of the side plate 8, and the engaging tongues 10a and 12a are inserted into the notched grooves. 6a, 6
It can also be opened by removing it from b or by separating the engaging tongue piece from the neck portion and tilting the side plate 6 outward.

(Effect of the invention) As mentioned above, this invention focuses on the bottom plate, the front plate,
In a device that has a rear plate, left and right side plates, and has a lid plate, etc. connected to the rear plate, two sides are connected between each rising wall of the front plate, rear plate, and left and right side plates centered on the bottom plate. a fold-in corner flap, an engaging tongue piece connected to one side of the fold line provided on the radial diagonal of each fold-in corner flap, and an engaging tongue piece connected to the other side of the fold line of each fold-in corner flap. Since each of the rising walls is connected in a row and has a cutout groove provided at a position corresponding to the above-mentioned engagement tongue, the connection and unlocking of the adjacent rising walls at the corner portions can be performed using adhesive or the like. It is not necessary and can be easily done, and even if the surface of the blank is coated with resin to improve its resistance to water, oil, etc., only one side is sufficient, and it not only improves the overall strength. Since the corners have excellent shielding properties, leakage of not only moisture but also powder, etc. can be significantly reduced.

Furthermore, when the top plate 4 is closed, the engaging tongues of each corner flap, which are folded back by the left and right lid side plates and protruded to the outside of the notch groove, are pressed and attached to the side plates 6 and 7. , the strength of each corner can be improved.

In addition, the corner of the container of the present invention is a fold-in flap, and even after opening the zipper and releasing the engaging tongue, the folds of the fold-in flap remain, so the side plate cannot be resealed. This has various beneficial effects, such as making it possible to

[Brief explanation of the drawing]

FIG. 1 is a developed view showing an example of a carton blank used for assembling the packaging container of the present invention;
FIG. 2 is a perspective view showing the assembled state of the carton blank. 1...Bottom plate, 2...Front plate, 3...Rear plate, 4...
Top plate, 5... Front plate, 6, 7... Side plate, 8, 9...
...Lid side plate, 10, 11, 12, 13... Corner flap, 10a, 11a, 12a, 13a...
Engagement tongue piece, q, r, s, t... folding line.

Claims (1)

[Scope of claim for utility model registration] (1) The rising walls of the front plate, rear plate, left and right side plates, etc. connected to each edge of the bottom plate, the cover plate extending to the edge of the rear plate, and the adjacent a folding corner flap having two sides connected to each other between each rising wall, and an engaging tongue piece connected to one side of a folding line provided on a radial diagonal line of each folding corner flap; Each of the upright walls connected to the other side of the folding line of each folding corner flap has a notched groove provided at a position corresponding to the engaging tongue. A packaging container formed by engaging tongue pieces. (2) A packaging container according to claim 1 of the utility model registration claim, in which the inner surface of the container blank is waterproofed.