JP5410084B2 - Packing box and box-shaped core - Google Patents

Description

  The present invention relates to a foldable packaging box and a box-like core material that can be suitably used for such a packaging box.

Conventionally, cardboard boxes have been widely used as packaging means for distributing various products to the market. However, since the cardboard box is made of paper, it is weak against water and is not suitable for packing a product containing a lot of moisture as it is.
On the other hand, foamed resin boxes made of foamed polystyrene are used for applications where water resistance and heat insulation are required, such as when fish shellfish are boxed with ice and refrigerated or frozen. However, such a foamed resin box cannot be folded like a corrugated cardboard box and is bulky, and therefore requires a lot of storage space when used.

Therefore, for example, Patent Document 1 proposes a cardboard box assembled by corrugated cardboard by imparting water resistance to the corrugated cardboard by bonding liners to both sides of the core core obtained by corrugated core base paper. .
JP 2000-141518 A

  However, even when corrugated cardboard with water resistance is assembled into a cardboard box, gaps are formed at the four corners of the bottom due to its structure. For this reason, there is a problem that water accumulated at the bottom leaks out and wets the surroundings. In Patent Document 1, in consideration of such a problem, water leakage is attempted to be prevented by placing a moisture absorber at the bottom of the box.

In view of the above circumstances, the present inventors have water resistance, and even when water accumulates at the bottom, it does not leak out and can be folded so as not to be bulky. In order to obtain these alternatives that combine the advantages of a conventional corrugated cardboard box and a foamed resin box, such as no need for a storage space, there has been extensive research.
The present invention is one of the results made in the process of such intensive studies by the present inventors. Water resistance is imparted as necessary so that water does not leak to the outside even if water accumulates at the bottom. It is an object of the present invention to provide a foldable packaging box that can be easily performed, and a box-shaped core material that can be suitably used for such a packaging box.

The packaging box according to the present invention is composed of a box-shaped core material made of a rigid material that can be folded, and a flexible material that covers the outside of the core material and is folded following the core material. possess a covering material, said core material, and a two foldable and has been the bottom plate portion along the center line, bendable to each edge of the bottom plate portion opposed extending parallel to the center line A first side plate portion connected to each other and a second side plate portion connected to each side edge of the first side plate portion so as to be bendable, and assembled in a box shape so that the first side plate portions face each other. The end face of the second side plate portion forming piece connected to both side edges of one of the first side plate portions and the second side plate portion forming piece connected to both side edges of the other first side plate portion when in the state Each of the end surfaces of the first and second end surfaces abut on a virtual plane that includes the center line and is orthogonal to the bottom plate portion. Forming the second side plate portion, and the relief portion cut out in an isosceles triangle shape has an intersection line between the second side plate portion and the bottom plate portion when the relief portion is not present. as such, it is constituted that is formed on the second side plate portion or the bottom plate portion.

Further, the box-shaped core material according to the present invention is a box-shaped core material made of a rigid material for forming a foldable packaging box covered with a covering material made of a flexible material that can be folded and followed. A first side plate portion that can be folded in two along the center line, and a first side plate portion that extends in parallel with the center line and is connected to each of the end edges of the bottom plate portion so as to be bent. A second side plate part that is connected to each side edge of the first side plate part so as to be bendable, and when the state is assembled in a box shape so that the first side plate parts face each other, Each of the end surface of the second side plate portion forming piece connected to both side edges of the first side plate portion and the end surface of the second side plate portion forming piece connected to both side edges of the other first side plate portion is the center. wherein a line, and form the second side plate portion abutting on a virtual plane perpendicular to the bottom plate portion And the second side plate portion so that the line of intersection between the second side plate portion and the bottom plate portion when the relief portion notched into an isosceles triangle has no relief portion is the bottom side. It is set as the structure currently formed in the side or the said baseplate part side.

  According to the present invention, a foldable packaging box is provided by covering the outside of a box-shaped core material made of a rigid material that is foldable by a covering material made of a flexible material that can be folded in accordance. be able to.

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

  FIG. 1 is a perspective view showing an outline of a packaging box according to the present embodiment. The packaging box 1 includes a box-shaped core material 2 made of a rigid material that can be folded and an outer side of the core material 2. And a covering material 3 made of a flexible material. In addition, as shown in FIG. 2, the core material 2 and the covering material 3 are shown separately, and the packaging box 1 accommodates the core material 2 in the covering material 3 that has a bag shape according to the outer shape of the core material 2. Thus, the outer side of the core material 2 can be covered with the coating material 3.

In the examples shown in these drawings, the core member 2 has a box shape in which one surface of a rectangular parallelepiped is opened, a rectangular bottom plate portion 21 that can be folded in two along the center line C, and a parallel to the center line C. A first side plate part 22 that extends and is connected to each of the long side edges of the opposed bottom plate part 21 and a second side that is connected to each side edge of the first side plate part 22 so as to be bent. Side plate portion 23.

Such a core material 2 can be formed, for example, by cutting a flat rigid material by punching or the like so as to have a shape as shown in FIG. it can.
In order to bend a predetermined part of the rigid material, for example, it is possible to use appropriate means such as folding the part or performing a half-cut process. Moreover, it can be bent by cutting a predetermined part and constructing a hinge part between the cut parts.

FIG. 3 is a development view of the core material 2, and the bottom plate portion 21 is processed so as to be bendable along the center line C indicated by a two-dot chain line in FIG. 3. Can be folded in half. The first side plate portions 221 and 222 are connected to end edges 21a and 21b on the long side of the bottom plate portion 21 so as to be bent along a valley fold line indicated by a chain line in FIG. .
In addition, the second side plate portion forming pieces 231 can be bent along the valley fold lines indicated by chain lines in FIG. 3 at both side edges 221a, 221b, 222a, and 222b of the first side plate portions 221 and 222, respectively. , 232, 233, 234 are connected.

The core material 2 is assembled in a box shape so that the first side plate portions 22 face each other. At this time, the second side plate portion is formed so as to be connected to both side edges 221a and 221b of the first side plate portion 221. The end surfaces of the pieces 231 and 232 and the second side plate portion forming pieces 233 and 234 connected to both side edges 222a and 222b of the other first side plate portion 222 are in contact with each other on the virtual plane P shown in FIG. The second side plate portion 23 is formed in contact therewith. Thereby, the second side plate portion 23 of the core member 2 can be folded in two along the contact portion. At this time, although not particularly illustrated, a hinge portion is installed between the second side plate portion forming pieces 231 and 233 and the second side plate portion forming pieces 232 and 234 with which the end surfaces abut on the virtual plane P. Thus, it is possible to prevent the positional deviation.
The virtual plane P is a plane that includes the center line C of the bottom plate portion 21 and is orthogonal to the bottom plate portion 21.

  On the other hand, FIG. 4 shows a developed view of the covering material 3, and the covering material 3 includes a rectangular bottom portion 31 and side wall portions 32 and 33 connected to the respective sides of the bottom portion 31. And while raising the side wall parts 32 and 33 perpendicularly along the valley fold line shown by a chain line in FIG. 4, the edges of the side wall parts 32 and 33 can be formed into a bag shape by heat-sealing. it can.

As described above, the packaging box 1 is configured such that the outer side of the core material 2 is covered with the coating material 3 by housing the core material 2 in the bag-shaped coating material 3. When the core material 2 is folded, the covering material 3 made of a flexible material is also folded following this. Thereby, the packaging box 1 can be folded as shown in FIG. 5 from the state assembled in the box shape shown in FIG.
The core material 2 and the covering material 3 can be prevented from being easily separated by appropriate means such as an adhesive, an adhesive tape, a hook-and-loop fastener, and a hook.

  Further, in the example shown in FIG. 5, the bottom plate portion 21 of the core material 2 is bent in half toward the inside of the box, and the second side plate portion 23 is bent in half in the outside of the box to face each other. The core material 2 is folded so that the first side plate portions 22 are close to each other. When the core material 2 is folded in this way, the bottom portion 31 of the covering material 3 positioned outside the bottom plate portion 21 of the core material 2 also follows the bottom plate portion 21 of the core material 2 and enters the box. At this time, a part of the side wall portion 33 of the covering material 3 located outside the second side plate portion 23 of the core material 2 is pulled by the bottom portion 31 of the covering material 3 into the box. It will follow.

  For this reason, the escape part 25 for avoiding interference with the coating | covering material 3 is formed in the 2nd side board part 23 side of the core material 2 (refer FIG. 1). Such a relief portion 25 has two bottom tangents between the second side plate portion 23 and the bottom plate portion 21 when the relief portion 25 is not present when the core material 2 is assembled in a box shape. It can be formed in an equilateral triangular shape. In this way, when the packaging box 1 is folded, a part of the side wall 33 of the covering material 3 positioned outside the second side plate portion 23 of the core material 2 is part of the second side plate portion 23 of the core material 2. It can be drawn into the box without interference.

Further, in forming the escape portion 25, as shown in FIGS. 6 and 7, the vertices P ₂₁ of the bent portion of the bottom plate portion 21 of the folded core 2 than the apex P ₂₅ of the relief portion 25 relative Therefore, if it is located on the lower side, the second side plate portion 23 of the core material 2 can be prevented from interfering with the covering material 3. For this purpose, the height h of the relief portion 25 formed in an isosceles triangle shape only needs to be at least half (w / 2) of the length w of the base. For this reason, it is preferable that the relief portion 25 is formed by cutting out into an isosceles triangle shape having a vertical angle or a right angle.
Here, FIG. 6A is an explanatory view of the folded covering 3 viewed from the direction of arrow X in FIG. 5, and FIG. 6B is a view of the folded core 2 from the direction of arrow X in FIG. FIG. FIG. 7 is an AA end view of FIG.

In the packaging box 1 that can be folded as described above, the core material 2 is formed using a rigid material. The core material 2 is formed by using a rigid material mainly because the shape of the packaging box 1 is easy when storing and transporting the packaged items in the packaging box 1 assembled in a box shape. This is to prevent it from collapsing.
For this reason, the rigid material which forms the core material 2 can be arbitrarily selected according to the degree of rigidity required for the packaging box 1, and the shape of the packaging box 1 assembled into a box shape when used is easy. There is no particular limitation as long as it has a rigidity (shape retention) that does not collapse. In addition, as long as such rigidity is not impaired, although not particularly illustrated, it is possible to reduce the weight by making a hole in a part of the core material 2 (for example, the first side plate portion 22). is there.

  As the rigid material forming the core material 2, for example, a polyolefin resin such as polypropylene or polyethylene, a polystyrene resin such as polystyrene, a polyester resin such as polyethylene terephthalate, a polyamide resin such as nylon, or the like is used. A board | plate material can be illustrated and if the core material 2 is formed with a synthetic resin, the core material 2 will have water resistance. Such a plate made of synthetic resin may have a single layer structure or a multilayer structure in which the above resin materials are combined, and the rigidity can be appropriately adjusted depending on the plate thickness.

Further, as the rigid material forming the core material 2, a hollow plate material made of a synthetic resin having a hollow structure such as a so-called bubble boat, plastic corrugated cardboard, low foam board or the like can be used. An example is shown in FIG. The hollow plate material shown in FIG. 8 is formed by laminating a flat plate-shaped exterior material 203 on at least one surface of a core material 202 on which a large number of protrusions 201 bulging in a hollow shape are formed. It is preferable to form the core material 2 using such a synthetic resin hollow plate material because not only can a predetermined rigidity be ensured while achieving weight reduction, but also a heat insulating effect due to the hollow structure can be obtained. .
Here, FIG. 8 is an explanatory view showing a cutout of a main part of an example of a synthetic resin hollow plate material. In this example, the exterior material 203 is laminated on both the front and back surfaces of the core material 202.

  The covering material 3 can be formed of various flexible materials as long as the covering material 3 is flexible enough to follow the core material 2 when the packaging box 1 is folded. For example, a film material or a sheet material made of a synthetic resin made of a polyolefin resin such as polypropylene or polyethylene, a polystyrene resin such as polystyrene, a polyester resin such as polyethylene terephthalate, or a polyamide resin such as nylon can be exemplified. . The flexible material made of such a synthetic resin may be a single layer structure or a multilayer structure in which the above resin materials are combined, and further, a metal using aluminum or the like for providing light shielding properties and heat insulation properties. Although a vapor deposition film layer may be laminated, it is preferable that the material is capable of bag-making by heat fusion.

If the covering material 3 is formed of a synthetic resin, the covering material 3 has water resistance. Furthermore, water or the like has accumulated at the bottom of the packaging box 1 by using the covering material 3 that is formed into a bag shape by heat-sealing a flexible material made of a synthetic resin having water resistance. However, it is also possible to prevent it from leaking outside.
In addition, when the use of the packaging box 1 does not require water resistance and it is not necessary to consider water leakage, the flexible material forming the covering material 3 includes a material other than a synthetic resin film material or sheet material, For example, woven fabric, non-woven fabric, knitted fabric, paper, etc. can be used. Furthermore, in such a case, even if the foam has a cellular structure communicating with the surface such as polyurethane foam, it can be used as long as it is a material that can be molded into a flexible sheet. The covering material 3 can also be formed.

Moreover, as a flexible material which forms the coating | covering material 3, the bubble sheet made from a synthetic resin in which many independent bubble chambers as shown in FIG. 9 were formed can also be used, for example. The bubble sheet shown in FIG. 9 is formed by laminating a sealing film 303 on a film material 302 on which a large number of protrusions 301 bulging in a hollow shape are formed so as to seal the opening side of the protrusions 301. . It is preferable to form the covering material 3 using such a synthetic resin-made air bubble sheet because cushioning properties (impact resistance) and a heat insulating effect are obtained.
Here, FIG. 9 is an explanatory view showing a principal part of an example of a synthetic resin-made air bubble sheet.

  Although the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

For example, in the above-described embodiment, when the packaging box 1 is folded, the bottom plate portion 21 of the core material 2 is folded in two toward the inside of the box, and the second side plate portion 23 is folded in two toward the outside of the box. Although the example which made it bend was given, the direction which bends the baseplate part 21 and the 2nd side board part 23 can also be made reverse to embodiment mentioned above, for example, as shown in FIG.
In this case, the escape portion 25 for avoiding interference with the cover material 3 to be folded is formed on the bottom plate portion 21 side of the core material 2.

Moreover, in embodiment mentioned above, although the example which the form of the core material 2 was made into the box shape which one surface of a rectangular parallelepiped opened was shown, as shown in FIG. 11, the packaging box 1 has the form of the conventional cardboard box. It may be formed by imitating. Further, as shown in FIG. 12, a handle 4 can be attached.
Here, although FIG. 11 shows what imitates the form called A type | formula, you may imitate other well-known forms. Although not particularly illustrated, it is also possible to cover the opening of the packing box 1 by covering with a lid box as in a form called C type.

Moreover, in order to close the opening part of the packaging box 1 after accommodating the to-be-packaged goods, it is also possible to set it as an aspect as shown in FIG. In the example shown in FIG. 13, a flap 24 that is bendably connected to the core member 2 is provided, and the opening of the packaging box 1 can be closed by closing the flap 24. A lid box portion 34 as shown in the figure is provided on the covering material 3 side, and the closed flap 24 is covered by the lid box portion 34. At this time, the lid box portion 34 can be fixed in a state of covering the closed flap 24 by an appropriate means such as a hook-and-loop fastener.
In such an embodiment, for example, the core material 2 is formed by a hollow plate material as shown in FIG. 8, and an aluminum foil or an aluminum vapor deposition film is laminated on the sealing film 303 side of the bubble sheet as shown in FIG. It is suitable when the covering material 3 is formed of a flexible material to be used and the packaging box 1 is used as a folding cooler box.

  The present invention can be widely used as a packing means for various articles.

It is explanatory drawing which shows the outline of embodiment of the packaging box which concerns on this invention. It is explanatory drawing which isolate | separates and shows a core material and a coating | covering material. It is an expanded view which shows an example of a core material. It is an expanded view which shows an example of a coating | covering material. It is explanatory drawing which shows the state which folded the packing box. (A) is explanatory drawing which looked at the folded covering material from the arrow X direction in FIG. 5, (b) is explanatory drawing which looked at the folded core material from the arrow X direction in FIG. FIG. 6 is an AA end view of FIG. 5. It is explanatory drawing which shows an example of the hollow board material as a rigid raw material which forms a core material. It is explanatory drawing which shows an example of the bubble sheet | seat as a flexible raw material which forms a coating | covering material. It is explanatory drawing which shows the modification of embodiment of the packaging box which concerns on this invention. It is explanatory drawing which shows the other modification of embodiment of the packaging box which concerns on this invention. It is explanatory drawing which shows the other modification of embodiment of the packaging box which concerns on this invention. It is explanatory drawing which shows the other modification of embodiment of the packaging box which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packing box 2 Core material 21 Bottom board part 22 1st side board part 23 2nd side board part 231,232,233,234 2nd side board formation piece 25 Escape part 3 Covering material C Centerline P Virtual plane

Claims (6)

A box-shaped core made of a rigid material that can be folded;
It said covering the outer core, and possess a covering member made of a flexible material to be folded to follow the core material,
The core material is
A bottom plate that can be folded in half along the center line;
A first side plate portion that extends in parallel with the center line and is connected to each of the end edges of the bottom plate portion so as to be bendable;
A second side plate portion bendably connected to both side edges of the first side plate portion;
When the state assembled in a box shape so that the first side plate portions face each other,
Each of the end surface of the second side plate portion forming piece connected to both side edges of one of the first side plate portions and the end surface of the second side plate portion forming piece connected to both side edges of the other first side plate portion are , Including the center line and abutting on a virtual plane orthogonal to the bottom plate portion to form the second side plate portion,
The second side plate part side or the second side plate part side or the above so that the line of intersection of the second side plate part and the bottom plate part when the relief part cut out in an isosceles triangle shape has no relief part is the bottom side packing box characterized that you have been formed in the bottom plate portion. The packaging box according to claim 1 , wherein the relief portion is formed by cutting out an isosceles triangle having a right angle or an acute angle. The packing box as described in any one of Claim 1 or 2 which built the hinge part between each said 2nd side board part formation piece which an end surface contact | abuts on the said virtual plane. The rigid material forming the core material is a synthetic resin hollow plate material obtained by laminating a flat plate-shaped exterior material on at least one surface of a core material on which a large number of protrusions bulge in a hollow shape are formed. The packaging box as described in any one of Claims 1-3 . A synthetic resin obtained by laminating a sealing film on a film material in which a flexible material forming the covering material is formed with a large number of protrusions bulging in a hollow shape so as to seal the opening side of the protrusions The packing box according to any one of claims 1 to 4 , wherein the packing box is a gas bubble sheet. A box-shaped core material made of a rigid material for forming a foldable packaging box that is covered with a covering material made of a flexible material that is folded in accordance with it,
A bottom plate that can be folded in half along the center line;
A first side plate portion that extends in parallel with the center line and is connected to each of the end edges of the bottom plate portion so as to be bendable;
A second side plate portion bendably connected to both side edges of the first side plate portion;
When the state assembled in a box shape so that the first side plate portions face each other,
Each of the end surface of the second side plate portion forming piece connected to both side edges of one of the first side plate portions and the end surface of the second side plate portion forming piece connected to both side edges of the other first side plate portion are , Including the center line and abutting on a virtual plane orthogonal to the bottom plate portion to form the second side plate portion,
The second side plate part side or the second side plate part side or the above so that the line of intersection of the second side plate part and the bottom plate part when the relief part cut out in an isosceles triangle shape has no relief part is the bottom side A box-shaped core material formed on the bottom plate side.

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