Packing box

The present invention relates to a packaging box including a box body made of a bubble sheet and a partition portion.

There is known a packaging box in which a storage unit is divided into a plurality of parts by a middle partition and a plurality of items can be neatly stored. In particular, a packaging box provided with a partition made of a bubble sheet is provided with cushioning properties, and is therefore useful as a packaging container for transporting impact-sensitive fruits, ceramics, glass products, precision parts, and the like.

For example, the partition shown in Patent Document 1 includes a plurality of strip pieces in which bubble sheets are attached to both sides and cut lines in the vertical direction are appropriately formed, and these strip pieces are cut. It is constructed by assembling in a grid shape so that the incoming wires engage with each other.

Further, the partition shown in Patent Document 2 is also used as an underlay material forming the bottom surface of the accommodating portion, and has at least one quadrangular cutout portion in the expanded state of the bubble sheet and has a height of the partition. A set of three rows of easily foldable linear folds that are parallel at approximately equivalent intervals are crossed at the cutouts to form at least one set each in the vertical and horizontal directions, and a plurality of internal regions of the folds of each set are formed. It is formed as a partition forming portion that can be bent and erected in a substantially convex cross section, leaving the bottom surface portion of the accommodating portion.

<p><patcit num="1"><text>Utility Model Registration No. 3084323</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 2004-91006</text></patcit></p>

<p> However, the partition shown in Patent Document 1 and Patent Document 2 is a separate body from the box body of the packaging box, and is used by being incorporated into a box body such as a separately formed container, so that the weight of the packaging box as a whole is used. Not only does it become heavier, but the cushioning property may decrease depending on the material of the box body.</p><p> Further, the partition shown in Patent Document 1 is configured by assembling a plurality of strip pieces in a grid shape so that the cut lines are engaged with each other, so that the number of parts is large and it is troublesome to assemble. There is a problem that the strip pieces are easily separated from each other in the vertical direction.</p><p> On the other hand, the partition shown in Patent Document 2 is formed by being bent upright on the underlay material, so that the number of parts is small and it is easy to assemble. There is a problem that the holdability of the goods is inferior.</p><p> The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packaging box which can not only reduce the weight of the entire packaging box but also improve the cushioning property and holdability of the contained article. ..</p>

<p> In order to achieve the above object, the packaging box of the present invention is a packaging box having an article accommodating portion, and has a box body formed entirely of a bubble sheet, a bottom portion forming the bottom surface of the accommodating portion, and the accommodating portion. A side wall portion that surrounds the side of the box and a partition portion that divides the accommodating portion into a plurality of portions. The partition portion is integrated with the box body and is formed by being bent upright on the bottom portion. And a separate partition that is separate from the box body and is arranged in a direction intersecting with the integrated partition, and the separate partition is on the side of the hole of the integrated partition in a flexed and deformed state. It is configured to be penetrated from the side, expanded after penetration, and engaged with the integrated partition.</p>

<p> As described above, according to the present invention, not only the weight of the entire packaging box can be reduced, but also the cushioning property and the holdability of the contained article can be improved.</p>

<figref num="1">It is a schematic perspective view of the packaging box which concerns on embodiment of this invention.</figref><figref num="2">(a) is a schematic cross-sectional view of a three-layer foam sheet which is a material for forming a packaging box according to an embodiment of the present invention, and (b) is a material for forming a packaging box according to another embodiment of the present invention. It is a schematic cross-sectional view of the state in which the two-layer foam sheet is bent.</figref><figref num="3">It is a developed view which shows the lid of the packaging box which concerns on embodiment of this invention.</figref><figref num="4">It is a development view which shows the box body of the packaging box which concerns on embodiment of this invention.</figref><figref num="5">It is a developed view which shows the partition in the separate body of the packaging box which concerns on embodiment of this invention.</figref><figref num="6">(a) is a perspective view showing a separate partition of the packaging box according to the embodiment of the present invention, and (b) is a perspective view of the separate partition showing a bending deformation state at the time of penetration.</figref><figref num="7">It is a schematic perspective view which shows the assembly procedure (integral partition assembly process) of the packaging box which concerns on embodiment of this invention.</figref><figref num="8">It is a schematic perspective view which shows the assembly procedure (partition penetration process in a separate body) of the packaging box which concerns on embodiment of this invention.</figref><figref num="9">It is a schematic perspective view which shows the assembly procedure (partition development process in a separate body) of the packaging box which concerns on embodiment of this invention.</figref><figref num="10">It is a schematic perspective view which shows the assembly procedure (side wall part assembly process) of the packaging box which concerns on embodiment of this invention.</figref>

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

As shown in FIG. 1, the packaging box 1 according to the embodiment of the present invention fits into the box main body 3 having the storage portion 2 for articles, the partition portion 21 for partitioning the storage portion 2, and the box main body 3 from above. However, it is configured to include a lid 4 that covers the upper opening of the box body 3.

The box body 3, the partition 21 and the lid 4 are entirely formed of the bubble sheet 5. For example, a predetermined portion of the flat plate-shaped bubble sheet 5 is processed so as to be bendable, cut out by punching so as to have a shape as shown in FIGS. 3 to 5, and assembled according to a process described later to form a box. The main body 3, the partition portion 21, and the lid 4 are formed.

As shown in FIG. 2A, the bubble sheet 5 forming the box body 3, the partition 21 and the lid 4 has a cap film 7 having a large number of hollow protrusions 6 and protrusions 6. It is preferable to use a three-layer bubble sheet composed of a back film 8 laminated on the opening side and a liner film 9 laminated on the top side of the protrusion 6, but as a double-layer bubble sheet in which the liner film 9 is omitted. May be good. In particular, in the present embodiment, the bubble sheets 5 are laminated in a folded shape to form each part of the packaging box 1, so that the surface on the side where the liner film 9 is omitted is folded back as shown in FIG. 2 (b). If it is on the inside, it is possible to easily prevent the protrusion 6 of the cap film 7 from being exposed to the outside.

The cap film 7, back film 8 and liner film 9 constituting the bubble sheet 5 can be molded using, for example, a synthetic resin of polyethylene: 10 to 30% by weight and polypropylene: 90 to 70% by weight. The rigidity and flexibility of the bubble sheet 5 can be arbitrarily adjusted by changing the type and composition of the synthetic resin used for molding each of the films 7 to 9. The bubble sheet 5 of the present embodiment has rigidity enough to maintain the box shape after assembly, can be easily flexed and deformed, and has a degree that no crease remains when restored from the flexed and deformed state. The type and composition of the synthetic resin used for molding each of the films 7 to 9 are selected so as to have flexibility. As the bubble sheet 5, a three-layer bubble sheet or a two-layer bubble sheet may be used as it is, but another functional film, a decorative film, or the like may be further added to the front and back of the three-layer bubble sheet or the two-layer bubble sheet. It may be laminated.

Further, the bubble sheet 5 can secure good bendability only by forming the seal line L. The seal line L can be easily formed by using a heat seal device such as a band sealer or an impulse sealer. For example, a three-layer bubble sheet is linearly crushed while applying heat, and the back film 8 and the liner film 9 are formed. The seal line L is formed by heat-sealing. Then, at the portion where such a seal line L is formed, the bubble sheet 5 can be bent along the seal line L.

As shown in FIGS. 1 and 3, the lid 4 includes a lid upper portion 10 that covers the upper opening of the box body 3, and lid side portions 11 and 12 that extend downward from the four sides of the lid upper portion 10.

In the unfolded state shown in FIG. 3, one lid side portion 11 is continuous from the long side of the lid upper portion 10 via the seal line L1 and from the tip end portion of the outer surface portion 13 via the seal line L2. It consists of an inner side surface portion 14 and a connecting portion 15 that is continuous from both side ends of the outer surface portion 13 via a seal line L3. The seal line L1 is bent to erect the outer surface portion 13 from the lid upper portion 10, and further, the seal line. The lid side portion 11 is assembled by bending L2 and folding the inner side surface portion 14 inside the outer surface portion 13 in a polymerized manner.

Further, the other lid side portion 12 is formed from an outer surface portion 16 continuous from the short side of the lid upper portion 10 via the seal line L4 and an inner side surface portion 17 continuous from the tip end portion of the outer surface portion 16 via the seal line L5. Then, the lid side portion 12 is assembled by bending the seal line L4 so that the outer surface portion 16 stands up from the lid upper portion 10, and further bending the seal line L5 and folding the inner side surface portion 17 inside the outer surface portion 16 in a polymerized manner. Be done. At this time, the lid side portion 11 and the lid side portion 12 are integrally connected by sandwiching the connecting portion 15 of the lid side portion 11 as a core material between the inner side surface portion 17 and the outer surface portion 16.

As shown in FIGS. 1, 4 and 5, the box body 3 has a bottom portion 18 forming the bottom surface of the accommodating portion 2, side wall portions 19 and 20 surrounding the side of the accommodating portion 2, and a plurality of accommodating portions 2. It is provided with a partitioning portion 21, and further, the partitioning portion 21 is integrated with the box body 3, and is a separate body from the box body 3 and the integrated partition 22 formed by bending from the bottom 18 in an upright position. It is composed of a separate partition 23 arranged in a direction intersecting with the integrated partition 22. In the present embodiment, the number of the integrated partition 22 is "2" and the number of the separate partition 23 is "1", but the number of the integrated partition 22 and the separate partition 23 is the article to be accommodated. It can be set arbitrarily according to the situation.

In the unfolded state shown in FIG. 4, the bottom portion 18 is divided into three bottom surface portions 18a, each of which is connected via an integral partition 22. Each integrated partition 22 includes two side surface portions 24 that are continuous via the seal line L6, and a connecting portion 25 that is continuous from both side ends of each side surface portion 24 via the seal line L7. It is connected to the long side of the bottom surface 18a via L8. That is, each integrated partition 22 is formed by folding the seal line L6 into a mountain fold and the seal line L8 into a valley fold, and by overlapping the two side surface portions 24, the seal line L6 is bent upright on the bottom portion 18 (see FIG. 7). ..

In the developed view shown in FIG. 5, the separate partition 23 has two side surface portions 26 that are continuous via the seal line L9 and a connecting portion 27 that is continuous from both side ends of each side surface portion 26 via the seal line L10. By overlapping the two side surface portions 26 with the seal line L9 as a mountain fold, a separate partition 23 is formed (see (a) in FIG. 6).

The separate partition 23 is penetrated from the side into a hole 28 formed in the integrated partition 22 so as to face up and down. At that time, the separate partition 23 is in a flexed and deformed state as shown in FIG. 6 (b), and in this state, the partition 23 is penetrated from the side into the hole 28 of the integrated partition 22 (see FIG. 8). That is, since the height of the separate partition 23 is larger than the vertical width of the hole 28 formed in the integrated partition 22, the upper and lower ends of the separate partition 23 are bent and deformed so as to be folded. It is penetrated through the hole 28 of the partition 22.

The separate partition 23 is deployed after penetration and is engaged with the integrated partition 22 (see FIG. 9). That is, notches 29 are formed at both upper and lower ends of the separate partition 23, and the separate partition 23 is passed through the hole 28 of the integrated partition 22 and then expanded in the vertical direction. Then, at this time, the notch portion 29 is engaged with the integrally partition 22. As a result, the integrated partition 22 and the separate partition 23 are integrally connected. As described above, the bubble sheet 5, which is the material of the separate partition 23, has flexibility to the extent that no creases remain even when it is bent and deformed. Therefore, even if it is folded or unfolded, it depends on the creases. It does not spoil the aesthetics.

The separate partition 23 of the present embodiment has the same height as the integrated partition 22. In this way, the upper edge and the lower edge of the partition portion 21 can be aligned while the separate partition 23 is assembled to the hole 28 of the integrated partition 22 in a penetrating manner from the side. The separate partition 23 does not have to be the same height as the integrated partition 22. For example, the height of the separate partition 23 should be lower than that of the integrated partition 22, and when penetrating through the hole 28 of the integrated partition 22, one of the upper and lower ends of the separate partition 23 should be folded. It can be penetrated through the hole 28 of the integrated partition 22 in a state of being flexed and deformed.

In the unfolded state shown in FIG. 4, one side wall portion 19 has an outer surface portion 30 continuous from the long side of the bottom surface portion 18a located at the outer end via the seal line L11 and a seal line L12 from the tip end portion of the outer surface portion 30. It consists of a pair of inner side surface portions 31 that are continuous via the seal line L11 and a connecting portion 32 that is continuous from both side ends of the outer surface portion 30 via the seal line L13, and the outer surface portion 30 stands up from the bottom surface portion 18a by bending the seal line L11. Further, the side wall portion 19 is assembled by bending the seal line L12 and folding the inner side surface portion 31 inside the outer surface portion 30 in a polymerized manner. Further, the connecting portions 27 formed at both ends of the separate partition 23 can be deployed along the side wall portion 19 by bending the seal line L10, and are separated between the inner side surface portion 31 and the outer surface portion 30. By sandwiching the connecting portion 27 of the body partition 23 as a core material, the side wall portion 19 and the separate partition 23 are integrally connected (see FIG. 10).

In the unfolded state shown in FIG. 4, the other side wall portion 20 is continuous from the short side of each bottom surface portion 18a via the seal line L14 and from the tip end portion of the outer surface portion 33 via the seal line L15. The seal line L14 is bent to erect the outer surface portion 33 from the bottom surface portion 18a, and the seal line L15 is bent to fold the inner side surface portion 34 inside the outer surface 33 in a polymerized manner. The side wall 20 is assembled. At this time, by sandwiching the connecting portion 25 of the integrated intermediate partition 22 and the connecting portion 32 of the side wall portion 19 as a core material between the inner side surface portion 31 and the outer surface portion 30, the side wall portion 20 becomes the integrated intermediate partition 22 and the side wall portion 19. Is integrally connected with.

In the present embodiment, as described above, the upper edges of the side wall portions 19, 20 and the partition portion 21 are formed by the folded portions of the bubble sheet 5. In this way, the upper edges of the side wall portions 19, 20 and the partition portion 21 are smoothed, and the contained article is not damaged.

Next, the procedure for assembling the packaging box 1 (box body 3) according to the embodiment of the present invention will be described with reference to FIGS. 7 to 10.

FIG. 7 is a schematic perspective view showing a packaging box assembly procedure (integrated partition assembly step) according to the embodiment of the present invention, and FIG. 8 is a packaging box assembly procedure (separate partition assembly step) according to the embodiment of the present invention. A schematic perspective view showing a penetration step), FIG. 9 is a schematic perspective view showing a packaging box assembly procedure (separate partition unfolding step) according to the embodiment of the present invention, and FIG. 10 is a schematic perspective view showing the embodiment of the present invention. It is a schematic perspective view which shows the assembly procedure (side wall part assembly process) of a packaging box.

When assembling the box body 3 of the packaging box 1, first, as shown in FIG. 7, an integral partition 22 is formed. The integrated partition 22 can be formed by folding the seal line L6 into a mountain fold and the seal line L8 into a valley fold and folding the two side surface portions 24 in an upright position on the bottom portion 18.

Next, as shown in FIG. 8, the separate partition 23 is assembled to the integrated partition 22 in a penetrating manner. The separate partition 23 is formed by overlapping the two side surface portions 26 with the seal line L9 as a mountain fold. Further, when the separate partition 23 is penetrated through the hole 28 of the integrated partition 22 from the side, both upper and lower ends thereof are bent and deformed so as to be folded, and then the partition 23 is penetrated through the hole 28 of the integrated partition 22.

Next, as shown in FIG. 9, a separate partition 23 penetrating the hole 28 of the integrated partition 22 is developed. At this time, by engaging the notch 29 of the separate partition 23 with the integrated partition 22, the integrated partition 22 and the separate partition 23 are integrally connected.

Next, as shown in FIG. 10, side wall portions 19 and 20 are formed. The side wall portion 19 can be formed by bending the seal line L11 so that the outer surface portion 30 stands up from the bottom surface portion 18a, and further bending the seal line L12 and folding the inner side surface portion 31 inside the outer surface 30 in a polymerized manner. it can. At this time, the side wall portion 19 and the separate partition 23 are integrally connected by sandwiching the connecting portion 27 of the separate partition 23 as a core material between the inner side surface portion 31 and the outer surface portion 30.

Further, the side wall portion 20 is formed by bending the seal line L14 so that the outer surface portion 33 stands up from the bottom surface portion 18a, and further bending the seal line L15 and folding the inner side surface portion 34 inside the outer surface 33 in a polymerized manner. be able to. At this time, by sandwiching the connecting portion 25 of the integrated intermediate partition 22 and the connecting portion 32 of the side wall portion 19 as a core material between the inner side surface portion 31 and the outer surface portion 30, the side wall portion 20 becomes the integrated intermediate partition 22 and the side wall portion 19. Is integrally connected with.

According to the embodiment of the present invention configured as described above, the bottom surface of the housing portion 2 is attached to the box main body 3 which is the packaging box 1 having the housing portion 2 for articles and which is entirely formed of the bubble sheet 5. Since the bottom portion 18 of the eggplant, the side wall portions 19 and 20 surrounding the side of the accommodating portion 2, and the partition portion 21 for partitioning the accommodating portion 2 into a plurality of portions are provided, not only the weight of the entire packaging box can be reduced, but also the cushioning property can be achieved. Can be improved.

Further, the partition portion 21 is integrated with the box body 3 and is formed by bending the bottom portion 18 in an upright shape, and is separate from the box body 3 and is in a direction intersecting with the integrated partition 22. It is provided with a separate partition 23 to be arranged, and the separate partition 23 is penetrated from the side into the hole 28 of the integrated partition 22 in a flexed and deformed state, and is deployed after the penetration to engage with the integrated partition 22. Therefore, the integrated partition 22 and the separate partition 23 can be integrally connected to improve the holdability of the stored article. Moreover, since the bubble sheet 5, which is the material of the separate partition 23, has flexibility to the extent that no creases remain even when it is bent and deformed, the creases do not spoil the aesthetic appearance.

Further, since the height of the separate partition 23 is the same as the height of the integrated partition 22, the separate partition 23 is assembled to the hole 28 of the integrated partition 22 in a penetrating manner from the side. , The upper edge and the lower edge of the partition portion 21 can be aligned.

Further, since the upper edges of the side wall portions 19, 20 and the partition portion 21 are formed by the folded-back portion of the bubble sheet 5, the upper edges of the side wall portions 19, 20 and the partition portion 21 become smooth, and the stored article can be stored. It won't hurt.

Further, since both ends of the separate partition can be expanded along the side wall 19 and used as the core material of the side wall 19, the side wall 19 and the separate partition 23 are integrally connected to form the box body 3. Can increase the strength of.

Although the container of the present invention has been described by showing preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. Needless to say. For example, in the above-described embodiment, the connecting portions 27 that serve as the core material of the side wall portion 19 are formed at both ends of the partition 23 in the separate body, but if the strength required for the box body 3 is low, the partition 23 is in the separate body. The connecting portion 27 may be formed only at one end of the partition 23, or the connecting portion 27 may be omitted. As a result, the amount of material can be reduced and the manufacturing cost can be suppressed. Further, as shown by the imaginary line in FIG. 10, if the bottom laminated portion 18 ́ is formed on the tip side of the side wall portion 20, the bubble sheet 5 at the bottom of the box body 3 can be doubled, and more. The cushioning property can be further enhanced. Further, in the packaging box of the present invention, the lid 4 is not always necessary and can be omitted depending on the type and use of the article to be stored. Further, even when a lid is required, the material thereof is not limited to the foamed sheet in the above embodiment, and a material different from the foamed sheet such as corrugated cardboard may be used.

The present invention can be used in a packaging box provided with a partition made of a bubble sheet, and is particularly useful as a packaging container for transporting impact-sensitive fruits, ceramics, glass products, precision parts, and the like.

1 Packaging box 2 containment 3 Box body 4 lid 5 bubble sheet 18 bottom 19 Side wall 20 Side wall 21 Partition 27 Connection 28 holes L seal line