JP3170138U - Packaging box - Google Patents

Abstract

The present invention provides a packaging box that can prevent a side plate from being swollen when the packaging boxes are stacked.
A long side plate 1 and a short side plate 2 are alternately connected to each other. A top flap 4 and a bottom flap 4 are provided above and below each long side plate 1, and a top flap 5 and a bottom flap 5 are provided above and below each short side plate 2. In each of the continuous packaging boxes, a ruled line 7 is provided in parallel with the ruled line 6 on the side of the long side plate 1 of the ruled line 6 that is a boundary between the long side plate 1 and the top and bottom flaps 4 to form a double ruled line.
[Selection] Figure 2

Description

  The present invention relates to a packaging box, and more particularly to a packaging box in which a side plate does not swell in a stacked state.

  When an article is packaged in a generally used rectangular parallelepiped packaging box and stacked several times, the weight of the upper article is applied to the center of the side plate of the lower packaging box, the side plate bulges in the vertical direction, the appearance deteriorates, the article Problems such as damage to the product.

  As a countermeasure, Patent Document 1 below discloses that the side plate is bent by bending a ruled line that becomes a boundary between the side plate and the flap (flat plate) into a V shape or an arc shape, and applying a load to the corner portion that is stronger than the center portion of the side plate. A technique for preventing the swollen body is described.

JP 2007-39090 A

  However, the form in which the ruled line as described in Patent Document 1 is bent in a V shape or an arc shape greatly improves the strength, but the edge of the flap bulges out in a V shape or an arc shape. There is a problem in that the center part of the side plate swells slightly in the lateral direction when bent.

  An object of the present invention is to provide a packaging box that can be folded in the conventional manner when folded and maintains the flat state of the side plate, and can prevent the side plate from swelling even when stacked.

  In order to solve the above problems, in the present invention, in a packaging box in which flaps are continuously provided at the upper and lower ends of the side plate, a ruled line that is substantially parallel to the ruled line that forms the boundary between the side plate and the flap is provided on the side plate side. A heavy ruled line.

  It is preferable that the double ruled line part is only the center part of the side plate and the end part is a single ruled line.

  Moreover, you may make a thick ruled line the center part of the ruled line used as the boundary of a side plate and a flap.

  When the packaging boxes according to the present invention are stacked in several stages and the lower packaging box is excessively loaded by the upper packaging box, the double ruled line portion is crushed before the trunk bulges. For this reason, it is possible to prevent the swelling of the trunk.

The expansion | deployment top view of the packaging box which shows 1st Embodiment of this invention The perspective view which shows an assembly state same as the above. The expansion | deployment top view of the packaging box which shows 2nd Embodiment of this invention The perspective view which shows an assembly state same as the above.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, a pair of long side plates 1 and short side plates 2 are alternately connected to each other, and a passage 3 is connected to the outside of one short side plate 2. A top flap 4 and a bottom flap 4 are provided above and below each long side plate 1, and a top flap 5 and a bottom flap 5 are provided above and below each short side plate 2, respectively. A ruled line 7 is provided substantially parallel to the ruled line 6 on the side of the long side plate 1 at the center of the ruled line 6 that is a boundary between the long side plate 1 and the top and bottom flaps 4 to form a double ruled line. The length of the ruled line 7 is preferably about 1/3 to 4/5 of the ruled line 6. More preferably, it is about 1/2. The interval between the ruled line 6 and the ruled line 7 is preferably about 2 mm to 10 mm. More preferably, it is about 2 mm to 8 mm. Furthermore, about 3 mm is the best.

  When using this packaging box, as shown in FIG. 2, each pair of long side plate 1 and short side plate 2 is bent into a vertical cylindrical shape, and the passage 3 is bonded to the opposite long side plate 1 and the bottom side The bottom flap 4 is bonded to the bottom flap 5 to close the bottom surface, the article is stored, and the top flap 4 is overlapped with the top flap 5 on the upper surface side and sealed.

  Since the ruled line 6 is a straight line, the side plate 1 can be bent at a right angle with respect to the flap 4 in a flat state as in the past.

  Even if the packaging box of FIG. 2 is stacked several times and an excessive load is applied to the lower packaging box due to the upper packaging box, the phenomenon that the long side plate 1 is deformed toward the outside of the box, that is, the so-called bulging phenomenon occurs. The cardboard between the double ruled lines is crushed. For this reason, the swelling phenomenon can be prevented.

A packaging box with a width of 950 mm, a depth of 150 mm, and a height of 600 mm is formed by a corrugated cardboard sheet (Rengo Co., Ltd., RKA280, A flute, basis weight of 280 g / m ² ). When measured, it was 3340 N in the conventional packaging box, but it was improved to 5000 N in the double ruled line (ruled line interval 3 mm) packaging box of the first embodiment.

  In addition, since the long side plate is longer than the short side plate, the body swelling phenomenon easily occurs. Therefore, it is preferable that only the ruled line 6 that becomes the boundary between the long side plate 1 and the flap 4 is a double ruled line, and the ruled line 8 that becomes the boundary between the short side plate 2 and the flap 5 is a normal ruled line. Moreover, when the packaging box has a shape close to a square, both ruled lines 6 and 8 may be double ruled lines.

  In the present embodiment, the ruled line 6 and the ruled line 7 are double ruled lines. However, the central part of the ruled line 6 may be 1.5 to 5 times the normal, preferably about 4 times, and the ruled line may be thickened on the side plates 1 and 2 side. Since the corrugated cardboard of this part is crushed, the same effect can be obtained. The thick ruled line is preferably about 1/3 to 4/5 of the ruled line 6 in length. More preferably, it is about 1/2.

  Although the method for forming the thick ruled line is not particularly limited, an example is a method in which a template is formed by mounting a plurality of ruled members arranged in parallel, and the ruled member is pressed against a cardboard sheet to form a ruled line. . In addition, for example, five ruled members are used, and the second and fourth ruled members are attached higher to press strongly, and the first, third, and fifth are attached lower to weakly press. it can.

  Next, an octagonal packaging box according to a second embodiment of the present invention will be described with reference to FIGS. In addition, a common code | symbol is used for the member which is common in 1st Embodiment.

  In the corrugated board blank of the second embodiment, an intermediate plate 9 is provided between the long side plate 1 and the short side plate 2 as shown in FIG. Similar to the first embodiment, a ruled line 7 that is shorter than the ruled line 6 is provided on the long side plate 1 side of the ruled line 6 that is a boundary between the long side plate 1 and the top and bottom flaps 4. It is a ruled line.

  FIG. 4 shows an octagonal packaging box formed by assembling the blank. As shown in the figure, when the top flap 5 is overlaid on the top flap 4, when the packaging boxes are stacked, the top flap 5 fits into the concave portion 10 on the bottom surface, thereby preventing lateral displacement.

  Also in the second embodiment, when an excessive load is applied from above, the corrugated cardboard between the double ruled lines is crushed before the phenomenon that the long side plate 1 is deformed toward the outside of the box, that is, the so-called body swelling phenomenon occurs. . For this reason, the swelling phenomenon can be prevented.

  The form of the packaging box is not limited to the above. For example, various forms such as a flap provided on the end face of the box are included. The material of the packaging box may be cardboard as well as cardboard. Alternatively, a synthetic resin or a composite material of paper and synthetic resin may be used.

1 Long side plate 2 Short side plate 3 Passage 4, 5 Flap 6, 7, 8 Ruled line 9 Intermediate plate 10 Recess

Claims (5)

  In a packaging box in which flaps (4, 5) are connected to the upper and lower ends of the side plates (1, 2), ruled lines (6, 8) that serve as boundaries between the side plates (1, 2) and the flaps (4, 5) A packaging box characterized in that a ruled line (7) substantially parallel to at least one of the side plates (1, 2) is provided to form a double ruled line.   The packaging box according to claim 1, characterized in that the double ruled lines (6, 7) are only the central part of the side plate (1) and the end parts are single ruled lines.   The packaging box according to claim 1 or 2, wherein the ruled line (7) is provided with a distance of about 2 mm to 10 mm from the ruled line (6) and has a length of about 1/3 to 4/5 of the ruled line (6).   In a packaging box in which flaps (4, 5) are connected to the upper and lower ends of the side plates (1, 2), ruled lines (6, 8) that serve as boundaries between the side plates (1, 2) and the flaps (4, 5) A packaging box characterized in that at least one central part is a ruled line that thickens toward the side plate (1, 2).   The packaging box according to claim 4, wherein the thick ruled line has a thickness of about 1.5 to 5 times the ruled line (6) and a length of about 1/3 to 4/5 of the ruled line (6).

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