JP7437952B2 - Reinforcement member and packaging box using the same - Google Patents

Description

The present invention relates to a reinforcing member and a packaging box using the same.

BACKGROUND ART Packaging boxes having a rectangular cross section and having reinforcing portions at the four corners are conventionally known (for example, see Patent Document 1). In Patent Document 1, a reinforcing portion is formed by folding a horizontal flap that connects four side walls.

Japanese Patent Application Publication No. 2000-185767

In Patent Document 1, the reinforcing section is provided in the packaging box itself, but it is also conceivable to construct the packaging box body and the reinforcing member that constitutes the reinforcing section as separate bodies.

In this case, by connecting the reinforcing side plates to the reinforcing bottom plate housed in the packaging box body, and by connecting the corner reinforcing pieces that reinforce the four corners to the side edges of the reinforcing side plates, the corner reinforcing pieces as the reinforcing parts are individually packaged. It is easier to accommodate the package inside the packaging box body compared to the case where it is placed inside the box body.

However, when the corner reinforcing pieces are housed in the packaging box body together with the reinforcing bottom plate and the reinforcing side plates, the corner reinforcing pieces are attached to the flaps provided on the packaging box body or on the rectangular cylindrical body composed of the plurality of side plates. There is a problem in that the corner reinforcing pieces get caught on the edges and cannot be easily accommodated within the packaging box body.

In view of the above points, the present invention provides a reinforcing member that allows corner reinforcing pieces to be easily accommodated in a packaging box body without being hooked on the upper edge of the body of the packaging box body, and a packaging box using the same. The purpose is to

In order to achieve the above object, the present invention
A reinforcing member housed in a packaging box body including a rectangular cylindrical body formed of a plurality of side plates and a bottom that closes a lower opening of the body,
A pair of first side edges facing each other, a pair of second side edges extending in a direction intersecting the first side edges, and a third side edge connecting the first side edge and the second side edge. a reinforcing bottom plate that is accommodated in the packaging box body and overlapped with the bottom plate;
a reinforcing side plate that stands up from the first side edge of the reinforcing bottom plate, is accommodated in the packaging box body, and is stacked on the side plate;
a corner reinforcing piece continuous to the side edge of the reinforcing side plate;
a guide piece that is connected to a lower edge of the corner reinforcing piece, connected to a third side edge of the reinforcing bottom plate, and overlapped with the reinforcing bottom plate;
Equipped with
The outer edge of the guide piece is characterized in that it extends in a direction connecting the side edge of the corner reinforcing piece and the second side edge of the reinforcing bottom plate.

According to the present invention, when the reinforcing member is housed in the packaging box body, the guide piece comes into contact with the upper edge of the body before the corner reinforcing piece comes into contact with the upper edge of the body of the packaging box body. As the guide pieces stand up against the reinforcing bottom plate, the corner reinforcing pieces are woven inward, thereby preventing the corner reinforcing pieces from getting caught on the upper edge of the trunk. Therefore, according to the present invention, the corner reinforcing pieces can be easily accommodated in the packaging box body without being hooked on the upper edge of the body of the packaging box body.

Further, in the present invention, the boundary between the corner reinforcing piece and the guide piece includes a crease line extending along the boundary, and a protruding piece that is connected to the corner reinforcing piece and protrudes toward the reinforcing bottom plate. is preferably provided.

According to the present invention, the crease line is shortened by the amount of the protruding piece provided, so that the guide piece can be easily bent with respect to the corner reinforcing piece, and the protruding piece connected to the lower edge of the corner reinforcing piece Since the tips of the corner reinforcing pieces contact the reinforcing bottom plate, the vertical stacking strength of the corner reinforcing pieces can be improved.

Further, the reinforcing member of the present invention is housed in the packaging box main body, which includes the rectangular tube-shaped body formed of a plurality of side plates, and the bottom portion that closes the lower opening of the body. It can also be used as a packaging box.

FIG. 2 is a perspective view showing a packaging box in which a reinforcing member according to an embodiment of the present invention is housed in a packaging box main body. FIG. 2 is an explanatory diagram showing the reinforcing member of the present embodiment in an expanded state. FIG. 3 is an explanatory diagram showing a state before the reinforcing member of the present embodiment is housed in the packaging box body. Explanatory drawings showing the process of accommodating the reinforcing member of this embodiment in the packaging box body. FIG. 2 is an explanatory diagram showing a state in which the reinforcing member of this embodiment is accommodated in a packaging box body.

Embodiments of a reinforcing member of the present invention and a packaging box containing the reinforcing member will be described with reference to the drawings.

As shown in FIG. 1, the packaging box 1 of this embodiment is made of cardboard and includes a packaging box body 2 and a reinforcing member 3 accommodated in the packaging box body 2. The packaging box body 2 includes a rectangular bottom plate 4 (see FIG. 3, which corresponds to the bottom of the present invention), four rectangular cylindrical side plates 5 that stand up from the periphery of the bottom plate 4, and an upper edge of the side plates 5. It is provided with four flaps 7 which are arranged in series and can be bent inward at right angles with respect to the side plates 5 to freely close at least a part of the upper opening 6 of the rectangular cylindrical body formed by the four side plates 5.

Although the flap 7 completely closes the opening 6 in this embodiment, it is not necessarily necessary to completely close the opening 6, and the flap 7 may be configured to close only a portion of the opening 6. Furthermore, the packaging box 1 may be made of other paper material, such as paperboard (cardboard), instead of cardboard. In this embodiment, the flap 7 corresponds to a top portion that can freely close the upper opening of the packaging box main body of the present invention. Further, the body is not limited to a rectangular shape, but may be a rectangular tube shape consisting of a plurality of side plates, for example, a hexagonal body consisting of six side plates, or an octagonal body consisting of eight side plates. You can also do that.

FIG. 2 shows a developed view of the reinforcing member 3. As shown in FIG. 2, the reinforcing member 3 of the present embodiment has a pair of first side edges 11a facing each other, a pair of second side edges 11b facing each other and perpendicular to the first side edges 11a, and a first side edge 11a facing each other. The reinforcing bottom plate 11 has four third side edges 11c located between the side edge 11a and the second side edge 11b. That is, the reinforcing bottom plate 11 is formed in an octagonal shape. Note that when the packaging box main body is configured in a hexagonal or octagonal shape, the second side edges 11b do not need to face each other, and may be connected to the first side edge 11a via the third side edge 11c. Bye.

A pair of rectangular reinforcing side plates 12 are connected to the reinforcing bottom plate 11 so as to stand upwardly from the pair of first side edges 11a, respectively, along fold lines L1. Rectangular corner reinforcing pieces 13 are connected to both side edges of the reinforcing side plate 12 via a fold line L2. Cuts (indicated by thick lines) are provided on the fold line L2 at predetermined intervals to make it easier to bend the corner reinforcing pieces 13 to the reinforcing side plates 12. The reinforcing member 3 is configured such that the center core of the cardboard corrugates in the vertical direction in FIG. 2 so that the reinforcing side plates 12 and the corner reinforcing pieces 13 have strength in the vertical direction.

Triangular guide pieces 14 are connected to the lower edges of the corner reinforcing pieces 13 via fold lines L3. Cuts (indicated by thick lines) are provided at predetermined intervals on the fold line L3 to make it easier to bend the guide piece 14 with respect to the corner reinforcing piece 13. The guide piece 14 is connected to the reinforcing bottom plate 11 via the fold line L4. Cuts (indicated by thick lines) are provided on the fold line L4 at predetermined intervals to make it easier to bend the guide piece 14 with respect to the reinforcing bottom plate 11.

The outer edge 14a constituting one side of the triangular guide piece 14 seamlessly connects the side edge 13a of the corner reinforcing piece 13 and the second side edge 11b of the reinforcing bottom plate 11. Thereby, when the reinforcing member 3 is housed in the packaging box body 2, when the outer edge 14a of the guide piece 14 comes into contact with the upper edge of the flap 7 or the side plate 5, the guide piece 14 can be moved along the fold lines L3, L4 without being caught. A force is applied to smoothly bend it inward.

Further, since the lower end edge of the corner reinforcing piece 13 and the reinforcing bottom plate 11 are connected by the guide piece 14, the reinforcing member It is possible to suppress the amount of waste discharged when punching and forming 3.

Further, since the lower end edge of the corner reinforcing piece 13 and the reinforcing bottom plate 11 are connected by the guide piece 14, it is possible to suppress the corner reinforcing piece 13 from flapping inside the packaging box body 2.

Furthermore, a projecting piece 15 is provided on the lower edge of the corner reinforcing piece 13 on the side of the reinforcing side plate 12 by cutting it into an L-shape so as to connect the end of the crease line L3 and the end of the crease line L1. . The protruding piece 15 protrudes by the thickness of the corrugated paperboard, and is folded back so as to overlap the guide piece 14 on the reinforcing bottom plate 11 at the fold line L4, and then folded at the fold line L3 to attach the corner reinforcing piece 13 to the reinforcing bottom plate 11. The tip of the protruding piece 15 is configured to directly contact the top of the reinforcing bottom plate 11 without using the guide piece 14 when it is vertically erected. The protruding pieces 15 can improve the stacking strength of the corner reinforcing pieces 13 in the vertical direction when the corner reinforcing pieces 13 are stood up perpendicularly to the reinforcing bottom plate 11.

Further, as is clear from the above description, the crease line L3 and the protruding piece 15 are provided at the boundary between the corner reinforcing piece 13 and the guide piece 14.

Furthermore, a leg portion 16 is provided at the center of the fold line L1 by a slit and a U-shaped cut line. The legs 16 are such that when the reinforcing side plates 12 are bent at right angles to the reinforcing bottom plate 11 along the fold line L1 and stood up, the tips of the legs 16 come into direct contact with the top of the bottom plate 4 of the packaging box body 2. This serves to improve the vertical stacking strength of the reinforcing side plates 12.

Referring to FIG. 3, when putting the reinforcing member 3 into the packaging box main body 2, the reinforcing member 3 before being bent is first placed above the opening 6 of the packaging box main body 2. Then, by pushing the reinforcing bottom plate 11 into the packaging box body 2 from above, the reinforcing side plates 12 are pushed against the upper edges of the side plates 5 of the packaging box body 2 and gradually stand up.

Further, as the reinforcing bottom plate 11 is pushed into the packaging box body 2 from above, the outer edge 14a of the guide piece 14 gradually comes into contact with the upper edge of the flap 7 or the side plate 5, and the packaging box body 2 is moved along the fold line L4. The guide piece 14 is folded inside. Since the outer edge 14a of the guide piece 14 seamlessly connects the side edge 13a of the corner reinforcing piece 13 and the second side edge 11b of the reinforcing bottom plate 11, as the guide piece 14 is folded inside the side plate 5, the corner The reinforcing piece 13 is also gradually folded along the fold line L2 so as to fit between (inside) the opposing side plates 5 without getting caught on the upper edges of the flap 7 or the side plates 5. Along with this, the reinforcing side plate 12 is also pushed by the upper edge of the side plate 5 and gradually stands up, so that the guide piece 14 is finally folded over the reinforcing bottom plate 11.

Then, as shown in FIG. 5, the reinforcing member 3 is completed inside the packaging box body 2.

According to the reinforcing member 3 and the packaging box 1 of this embodiment, when the reinforcing member 3 is housed in the packaging box body 2, the guide piece 14 contacts the flap 7. Then, as the guide piece 14 stands up with respect to the reinforcing bottom plate 11, the corner reinforcing piece 13 is woven inward, and the corner reinforcing piece 13 can be prevented from being caught on the flap 7. Therefore, according to the present embodiment, the corner reinforcing pieces 13 can be easily accommodated in the packaging box body 2 without being caught on the flaps 7 of the packaging box body 2.

Further, according to the present embodiment, a non-continuous portion 15a that is not continuous to the guide piece 14 is provided at the lower end edge of the corner reinforcing piece 13, located on the side of the reinforcing side plate 12. The non-continuous portion 15a is provided with a projecting piece 15 that can directly contact the reinforcing bottom plate 11 without using the guide piece 14. As a result, the guide piece 14 can be easily bent along the fold line L3 with respect to the corner reinforcing piece 13, and the protruding piece 15 connected to the lower end edge of the corner reinforcing piece 13 on the side of the reinforcing side plate 12 is reinforced. Since the corner reinforcing pieces 13 can be directly contacted with the bottom plate 11, the vertical stacking strength of the corner reinforcing pieces 13 can be improved.

In the present embodiment, the packaging box 1 has been described as having a top portion that closes the upper opening 6 of the body, but the packaging box of the present invention is not limited to this, and may include, for example, a top portion. It may also be a tray-shaped packaging box.

1 Packaging box 2 Packaging box body 3 Reinforcement member 4 Bottom plate 5 Side plate 6 Opening 7 Flap 11 Reinforcement bottom plate 11a First side edge 11b Second side edge 11c Third side edge 12 Reinforcement side plate 13 Corner reinforcement piece 13a Side edge 14 Guide piece 14a Outer edge 15 Projection piece 15a Non-continuous portion 16 Leg portions L1 to L4 Crease line

Claims (3)

A reinforcing member housed in a packaging box body including a rectangular cylindrical body formed of a plurality of side plates and a bottom that closes a lower opening of the body,
A pair of first side edges facing each other, a pair of second side edges extending in a direction intersecting the first side edges, and a third side edge connecting the first side edge and the second side edge. a reinforcing bottom plate that is housed in the packaging box body and stacked on the bottom ;
a reinforcing side plate that stands up from the first side edge of the reinforcing bottom plate, is accommodated in the packaging box body, and is stacked on the side plate;
a corner reinforcing piece connected to a side edge of the reinforcing side plate;
a guide piece that is connected to a lower end edge of the corner reinforcing piece and a third side edge of the reinforcing bottom plate and overlapped with the reinforcing bottom plate;
Equipped with
A reinforcing member, wherein an outer edge of the guide piece extends to connect a side edge of the corner reinforcing piece and a second side edge of the reinforcing bottom plate. The reinforcing member according to claim 1,
The boundary between the corner reinforcing piece and the guide piece is provided with a crease line extending along the boundary, and a projecting piece that is connected to the corner reinforcing piece and protrudes toward the reinforcing bottom plate. Characteristic reinforcing members. The reinforcing member of claim 1 or claim 2,
The packaging box is housed in the packaging box main body, which includes the rectangular tubular body formed of a plurality of side plates, and the bottom that closes the lower opening of the body. .

Images