JP2017206274A - Packaging container with stacking function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container with a stacking function which is structurally strong and is excellent in pressure resistance.SOLUTION: In a packaging container, a side wall 2 and an end wall 3 rising in the periphery of a bottom wall 1 are connected with a corner part having a corner ridge line 8 in between, and an engaging protruding part 10 and an engaging recessed part 11 are respectively provided in an upper part and a lower part of the corner part. In the corner part, oblique folding lines 11a, 11b extending in an oblique direction are provided in a manner to be gradually separated from each other from the corner ridge line 8 to lower ends of the side wall 2 and the end wall 3 while using a position separated from a bottom side to the above as an origin. A valley- fold line 11c extending downward from the corner ridge line 8 is provided in a part between the oblique folding lines 11a, 11b. The engaging recessed part 11 is formed by folding the part between the oblique folding lines 11a, 11b in a manner to be dented to the inside by using the valley-fold line 11c as an axis. Since the engaging recessed part 11 is formed only by folding without providing a cutting line intersecting the corner ridge line 8, the packaging container is structurally strong, and the packaging container ensures excellent pressure resistance since the side wall 2 and the end wall 3 are upright.SELECTED DRAWING: Figure 4

Description

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

  Conventionally, in Patent Document 1 below, as shown in FIG. 5, a pair of side walls 52 and end walls 53 that are continuously provided around the bottom wall 51 are erected and extended from the side walls 52 via angular ridges 54. In the tray-shaped packaging container in which the corner 55 is formed by bending the piece 55 and the connecting piece 55 is attached to the end wall 53, a protruding engagement convex portion 56 is provided at the upper portion of the corner portion, and the engagement concave portion is provided at the lower portion. What provided 57 is described.

  The engagement recess 57 of the packaging container includes a first folding portion 57 a that is folded inward from a side of the cut line that extends from the side wall 52 across the corner ridge line 54 to the connecting piece 55, and a cut that extends from the bottom wall 52 to the end wall 53. It is formed by overlapping with the second folding part 57b folded inward at the end side of the line of sight.

  When stacking such packaging containers into a stacking state, the engaging projections 56 of the lower packaging container are engaged with the engaging recesses 57 of the upper packaging container so that the lower packaging side and the upper packaging side are engaged. To prevent the packaging container from being unloaded.

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

  When stacking such packaging containers into a stacking state, the peripheral edge of the bottom wall 61 of the upper packaging container is placed on the frame parts 64, 65 of the lower packaging container, and the lower packaging container is used. The upper packaging container is supported.

JP 2009-29494 A JP 2012-162289 A

  However, in the packaging container shown in FIG. 5, the cut line for forming the engaging recess 57 crosses the corner ridge line 54, so that it is structurally weak, and the vicinity of the corner ridge line 54 is caused by an external force due to an impact or the like during transportation. There is a problem in that damage such as torn or a part facing the engaging recess 57 is easily broken and the assembled shape is damaged.

  Moreover, in the packaging container shown in FIG. 6, since the side wall 62 and the end wall 63 are inclined, when the heavy load is stored and a large vertical load acts during storage, the side wall 62 and the end wall 63 end. There is a problem that a large load acts on the connecting portion of the wall 63 and the side wall 62 and the end wall 63 easily fall down, and the pressure resistance against the load is lowered.

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

In order to solve the above-mentioned problems, the present invention is such that the side wall and the end wall that rise around the bottom wall are connected with the corner portion having a corner ridge line interposed therebetween, and are engaged with the upper portion of the corner portion in order to prevent a stacking error in a stacking state In a packaging container provided with a convex part and an engaging concave part at the bottom,
In the corner portion, a diagonal line extending diagonally from the corner ridge line to the lower end of the side wall and the end wall starting from a position away from the bottom side is provided, and between the diagonal lines. The part of the line has a valley fold line extending downward from the corner ridgeline,
The part between the diagonal fold lines of the corner portion is folded so as to be recessed inward with the valley fold line as an axis, and the engagement concave portion is formed.

  In the packaging container according to the present invention, the engaging concave portion at the lower portion of the corner portion is formed only by folding along the oblique fold line and the valley fold line without entering a score line that crosses the corner ridge line, so that it is structurally strong. Thus, damage due to impact during transportation is less likely to occur.

  In addition, the side walls and end walls can be set upright in an assembled state, and even if they are stacked in a state where heavy objects are stored, the side walls and end walls do not fall down due to a large vertical load, and are excellent in storage suitability. Can be.

The figure which shows the blank of the packaging container with a stacking function made from corrugated cardboard concerning this embodiment of the invention The perspective view which shows an assembly state same as the above. Partial enlarged perspective view showing the same corner portion from below The perspective view which shows the stacking state of a packaging container same as the above The perspective view which shows the stacking state of the packaging container of patent document 1 The perspective view which shows the stacking state of the packaging container of patent document 2

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  This packaging container has a tray shape and is assembled from a cardboard sheet blank as shown in FIG. In this blank, the four corners of the bottom wall 1 are cut obliquely, and the outer plate 4, the top portion 5, and the inner plate 6 constituting the side wall 2 are sequentially connected to the opposite long sides of the bottom wall 1, and the bottom wall 1 is opposed. An end plate 7 constituting the end wall 3 is continuously provided on the short side, and a connecting piece 9 constituting the end wall 3 is continuously provided on both ends of the outer plate 4 via the corner ridgeline 8.

  Engagement projections 10 projecting on both sides of the top 5 are provided at the corners facing the boundary between the outer plate 4 and the connecting piece 9.

  Further, in order to form the engaging recess 11, a slant extending in an oblique direction so that a gap is widened from an intermediate position in the height direction to the lower end when the outer plate 4 and the connecting piece 9 are assembled from the corner ridgeline 8. The fold lines 11a and 11b are inserted, and the valley fold line 11c extending downward from the corner ridge line 8 at the time of assembly is inserted between the oblique fold lines 11a and 11b.

  The oblique fold lines 11a and 11b and the valley fold line 11c are lead rules with cuts intermittently so that they can be easily bent during assembly.

  In addition, although the valley fold line 11c illustrated what provided only one on the extension line of the corner ridgeline 8, you may make it provide two or more below from the intersection of the diagonal fold lines 11a and 11b.

  To assemble such a blank, as shown in FIG. 2, the top 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-structure side wall. 2 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 engagement convex portion 10 protrudes from 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, at the lower part of each corner portion, as shown in FIG. 3, the portion between the oblique fold lines 11a and 11b is folded so as to be recessed inward with the valley fold line 11c as an axis, thereby forming the engagement recess 11.

  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. In this way, the stacking error between the lower and upper packaging containers is prevented.

  In the packaging container as described above, the engagement concave portion 11 at the lower portion of the corner portion is formed only by bending along the oblique fold lines 11a and 11b and the valley fold line 11c without entering a cut line across the corner ridge line 8. Therefore, it becomes structurally strong, and it is difficult for damages such as breakage of the corners due to impact during transportation.

  Moreover, since the side wall 2 and the end wall 3 stand upright in the assembled state, even if they are stacked in a state in which heavy objects are stored, a force in a direction in which the side wall 2 and the end wall 3 are tilted by a large vertical load acts. It will be excellent in storage suitability.

  For this reason, for example, when used as a tray for storing cupped yogurt, where strength may be reduced due to condensation during refrigerated distribution processes, or as a tray for storing fruit and vegetables such as potatoes that have a considerable weight, the stored items are reliably protected. Can be transported and stored.

  In addition, in the said embodiment, although the tray-shaped packaging container by which the top | upper surface was open | released was illustrated, the packaging container which provided the lid | cover flap which closes a top | upper surface in a tray-shaped part, and the grooved shape called A type | formula In addition to the packaging container, in the wrap-round packaging container, an engaging convex portion protruding upward is provided at the corner portion, and an engaging concave portion having the above-described configuration is provided to add a stacking function. Good.

DESCRIPTION OF SYMBOLS 1 Bottom wall 2 Side wall 3 End wall 4 Outer board 5 Top part 6 Inner board 7 End board 8 Corner ridge line 9 Connection piece 10 Engaging convex part 11 Engaging concave part 11a, 11b Diagonal fold line 11c Valley fold line

Claims (1)

The side wall (2) and end wall (3) rising around the bottom wall (1) are connected across the corner part having the corner ridge line (8), and are connected to the upper part of the corner part to prevent misloading in the stacking state. In the packaging container provided with the mating convex part (10) and the engaging concave part (11) in the lower part,
The corner portion has a diagonal fold line extending in an oblique direction so that a gap is widened from the corner ridge line (8) to the lower end of the side wall (2) and the end wall (3) starting from a position away from the bottom side. (11a, 11b) is inserted, and a valley fold line (11c) extending downward from the corner ridge line (8) is inserted in a portion between the oblique fold lines (11a, 11b),
Stacking characterized in that the engaging recess (11) is formed by folding the corner portion between the oblique fold lines (11a, 11b) so as to be recessed inward with the valley fold line (11c) as an axis. Functional packaging container.

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