JP6742148B2 - Packaging container with stacking function - Google Patents

Description

The present invention relates to a packaging container having a function of preventing stacking deviation in a stacking state.

Conventionally, in Patent Document 1 below, as shown in FIG. 5, a pair of side walls 52 and an end wall 53 that are continuously provided around a bottom wall 51 are erected, and a connection extending from the side wall 52 through a corner ridgeline 54. In a tray-shaped packaging container in which the piece 55 is bent to form a corner portion and the connecting piece 55 is attached to the end wall 53, a projection-shaped engaging convex portion 56 is provided on the upper portion of the corner portion, and an engaging concave portion is formed on the lower portion. Those provided with 57 are described.

The engagement concave portion 57 of the packaging container has a first folding portion 57a which is formed by folding the lower side of the cut line extending from the side wall 52 across the corner ridgeline 54 to the connecting piece 55 inward, and a cut extending from the bottom wall 51 to the end wall 53. It is formed by overlapping with the second folding portion 57b in which the end side of the line of sight is folded inward.

When stacking such packaging containers into a stacking state, the engaging projections 56 of the lower packaging containers are engaged with the engaging recesses 57 of the upper packaging containers to form the lower and upper layers. Prevents the packaging containers from being stacked.

Further, in Patent Document 2 below, as shown in FIG. 6, a pair of side walls 62 and an end wall 63, which are continuously provided around the bottom wall 61, are erected so as to incline outward from below to above, There is described a packaging container in which the side wall 62 and the end wall 63 are connected at a corner portion, and the side wall 62 and the end wall 63 form a double structure having frame portions 64 and 65 at the upper ends, respectively.

When stacking such packaging containers into a stacking state, the peripheral portions of the bottom wall 61 of the upper packaging container are placed on the frame portions 64 and 65 of the lower packaging container, and Make sure that the upper packaging container is supported.

JP, 2009-29494, A JP 2012-162289 A

However, in the packaging container shown in FIG. 5, since the cut line for forming the engaging recess 57 crosses the corner ridge line 54, it is structurally weak, and the vicinity of the corner ridge line 54 is weakened by an external force such as an impact during transportation. There has been a problem that breakage such as breakage or a part facing the engagement concave portion 57 is likely to occur, resulting in damage to the assembled shape.

Further, in the packaging container shown in FIG. 6, since the side wall 62 and the end wall 63 are inclined, when a large vertical load is applied during storage due to stacking with heavy objects stored, the side wall 62 and the end wall 63 are There is a problem that a large load acts on the connecting portion of the wall 63, the side wall 62 and the end wall 63 are likely to fall down, and the pressure resistance against the load is reduced.

Therefore, an object of the present invention is to provide a packaging container with a stacking function that is structurally strong and has excellent pressure resistance.

In order to solve the above-mentioned problems, the present invention is such that, around the bottom wall, side walls are continuously provided on one opposing side and end plates are continuously provided on the other opposing side, and from the bottom wall to the side wall and The end plate is erected, and an end wall is formed by fixing a connecting piece continuous to a side end of the side wall via a corner ridge to the end plate, and the side wall and the end wall are formed into a corner portion. In order to prevent stacking in the stacking state, in the packaging container provided with an engaging convex part at the upper part of the corner part and an engaging concave part at the lower part,
A diagonal line extending diagonally from the corner ridgeline to the lower end of the connecting piece of the side wall and the end wall is provided in the corner portion as a starting point at a position upward from the bottom side. A valley fold line extending downward from the corner ridgeline is inserted in the part between the fold lines,
The bottom wall is diagonally cut at the four corners corresponding to the portion between the lower ends of the diagonal fold lines, in the blank state, there is a gap between the side end of the end plate and the connecting piece,
A portion between the diagonal fold lines of the corner portion is mountain-folded along the diagonal fold line with respect to the side wall and the end wall when viewed from the outer surface side, and is valley-folded along the valley fold line, so that it is recessed inward. The engaging recess is formed by being folded.

In the packaging container according to the present invention, the engaging recess at the bottom of the corner portion is formed only by bending along the oblique fold line and the valley fold line without forming a cut line that crosses the corner ridge line, and therefore structurally strong. Therefore, damage due to impact during transportation is less likely to occur.

Also, the side wall and the end wall can be configured to stand upright in the assembled state, and even if they are stacked in a state in which heavy objects are stored, the side wall and the end wall do not fall down due to a large vertical load, and are excellent in storage suitability. It can be

The figure which shows the blank of the packaging container with a stacking function made from the corrugated board which concerns on embodiment of this invention. The perspective view which shows the assembled state same as the above. Partially enlarged perspective view showing the same corner portion from below The perspective view which shows the stacking state of the packaging container same as the above. A perspective view showing a stacking state of the packaging container described in Patent Document 1. Perspective view showing the stacking state of the packaging container described in Patent Document 2

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

This packaging container is in the form of a tray and is assembled from a blank of corrugated cardboard sheet as shown in FIG. In this blank, the four corners of the bottom wall 1 are cut obliquely, and the outer side plate 4, the top part 5 and the inner side plate 6 forming the side wall 2 are successively arranged on the opposite long sides of the bottom wall 1 so that they face each other. The end plates 7 that form the end wall 3 are continuously provided on the short side of the outer plate 4, and the connecting pieces 9 that form the end wall 3 are continuously provided at both ends of the outer plate 4 through the corner ridge lines 8.

Engagement protrusions 10 projecting from both sides of the top portion 5 are provided at portions forming a corner portion facing the boundary between the outer plate 4 and the connecting piece 9.

Further, in order to form the engaging recessed portion 11, an obliquely extending diagonally from the middle position in the height direction as the starting point to widen the distance from the corner ridge line 8 to the lower end of the outer plate 4 and the connecting piece 9 when assembled. The folding lines 11a and 11b are provided, and the valley folding line 11c extending downward from the corner ridge line 8 at the time of assembly is provided between the oblique folding lines 11a and 11b.

The diagonal fold lines 11a and 11b and the valley fold line 11c are lead ruled lines having intermittent cuts so that they can be easily bent during assembly.

Although only one valley fold line 11c is provided on the extension of the corner ridge line 8, a plurality of valley fold lines 11c may be provided below the intersection of the diagonal fold lines 11a and 11b.

In order to assemble such a blank, as shown in FIG. 2, the top plate 5 and the inner plate 6 are sequentially bent inward from the outer plate 4, and the inner plate 6 is attached to the inner surface of the outer plate 4 to form a double side wall. 2 is formed, and a pair of side walls 2 are erected from the bottom wall 1.

Next, the connecting piece 9 is bent inward along the corner ridgeline 8 so as to form a corner portion, and the engaging convex portion 10 is projected to the upper portion of each corner portion. 7 is erected and the end plate 7 is attached to the outer surface of the connecting piece 9 to form the end wall 3.

Then, as shown in FIG. 3, in the lower part of each corner portion, the portion between the diagonal folding lines 11a and 11b is viewed from the outer surface side along the diagonal folding lines 11a and 11b with respect to the outer plate 4 and the end plate 7. By performing mountain folds and valley folds along the valley fold lines 11c , the engaging recesses 11 are formed by being folded inward.

When stacking the packaging containers thus assembled into a stacking state, as shown in FIG. 4, the engaging convex portion 10 of the lower packaging container is engaged with the engaging concave portion 11 of the upper packaging container. This prevents the lower and upper packaging containers from being stacked.

In the packaging container as described above, the engaging recessed portion 11 at the lower portion of the corner is formed only by bending along the oblique folding lines 11a and 11b and the valley folding line 11c without forming a cut line that crosses the corner ridgeline 8. Therefore, it is structurally strong, and the damage such as the breakage of the corner portion due to the impact during transportation is less likely to occur.

Further, since the side wall 2 and the end wall 3 are upright in the assembled state, even if the side walls 2 and the end wall 3 are stacked in a state where heavy objects are stored, a force in a direction in which the side wall 2 and the end wall 3 fall down due to a large vertical load acts. And has excellent storage suitability.

For this reason, for example, when used as a tray for storing cupped yogurt where there is a risk of strength deterioration due to dew condensation during the refrigerated distribution process, or as a tray for storing fruits and vegetables such as potatoes with a considerable weight, the stored items are surely protected. It can then be transported and stored.

In the above embodiment, a tray-shaped packaging container having an open top surface is exemplified, but a packaging container in which a lid flap for closing the top surface is continuously provided to the tray-shaped portion, or a grooved type called A type. In addition to the packaging container, in a wrap round type packaging container, an engaging convex portion projecting upward is provided at a corner portion, and an engaging concave portion having the above configuration is provided to add a stacking function. Good.

DESCRIPTION OF SYMBOLS 1 Bottom wall 2 Side wall 3 End wall 4 Outer side plate 5 Top part 6 Inner side plate 7 End plate 8 Corner ridge line 9 Connecting piece 10 Engagement convex part 11 Engagement concave parts 11a, 11b Slanted line 11c Valley fold line

Claims (1)

Around the bottom wall (1), side walls (2) are continuously provided on one opposing side, and end plates (7) are continuously provided on the other opposing side, and the bottom wall (1) to the side wall are provided. (2) and the end plate (7) are erected, and a connecting piece (9) connected to the side end of the side wall (2) via a corner ridge (8) is fixed to the end plate (7). By this, the end wall (3) is formed, the side wall (2) and the end wall (3) are connected to each other with the corner portion sandwiched therebetween, and engage with the upper portion of the corner portion to prevent stacking deviation in the stacking state. The convex portion (10), in the packaging container provided with the engaging concave portion (11) respectively,
In the corner part, with a position separated upward from the bottom side as a starting point, a space is widened from the corner ridge line (8) to the lower end of the connecting piece (9) of the side wall (2) and the end wall (3). The diagonal fold lines (11a, 11b) extending diagonally are put, and the valley fold line (11c) extending downward from the corner ridge line (8) is put in the part between the diagonal fold lines (11a, 11b).
The bottom wall (1) has four corners obliquely cut corresponding to the portion between the lower ends of the oblique folding lines (11a, 11b), and in a blank state, the side end of the end plate (7) and the connecting piece. There is a gap between (9),
The part between the diagonal lines (11a, 11b) of the corner portion is mountain-folded along the diagonal lines (11a, 11b) with respect to the side wall (2) and the end wall (3) when viewed from the outer surface side, A packaging container with a stacking function, characterized in that it is folded along the valley fold line (11c) to be folded inward to form the engaging recess (11).

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