JP6680178B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box.

As a corrugated cardboard packaging box, a body formed in a rectangular tube shape, a lid that closes the upper opening of the body, and a bottom that closes the lower opening of the body. Some are equipped with.
The bottom portion of such a packaging box is provided with front and rear inner flaps and left and right outer flaps that are connected to the lower edge of the body, and the outer flaps are superposed on the lower surface of the inner flap.

  As the bottom of the packaging box described above, two front and rear insertion holes are opened in one outer flap, and two front and rear insertion pieces are formed in the other outer flap, and both insertion pieces are inserted in both insertion holes. There is one that connects both outer flaps by inserting them (see, for example, Patent Document 1).

Japanese Patent No. 5069062

  In the conventional packaging box described above, when storing and lifting a heavy content such as watermelon, if both outer flaps are pushed down by the weight of the content, the insertion piece can come out from the insertion hole. There is a nature.

  Further, when assembling the above-mentioned conventional packaging box, it is necessary to assemble two sets of insertion pieces and insertion holes at the same time, and it is difficult for an operator to assemble the bottom portion with one hand, which makes the assembly work complicated. There is a problem.

  An object of the present invention is to provide a packaging box that solves the above-mentioned problems, enhances the strength of the bottom portion, and facilitates the assembly of the bottom portion.

In order to solve the above-mentioned problems, the present invention is a packaging box, comprising a body formed in a rectangular tube shape, and a bottom portion closing an opening on the lower side of the body, wherein the body The part has front and rear end walls and left and right side walls. The bottom portion is provided with front and rear inner flaps that are continuously provided to the front and rear end walls, and first flaps and second flaps that are continuously provided to the left and right side walls and are stacked on the lower surface of the inner flap. There is. An insertion hole is opened in the first flap, and an insertion piece is continuously provided at a tip portion of the second flap. The insertion piece is inserted into the insertion hole and folded back with respect to the second flap, and a tip edge portion of the insertion piece is in contact with an inner surface of the side wall, and an upper surface of the second flap. And the lower surface of the insertion piece, the tip portion of the first flap is sandwiched.

In the packaging box of the present invention, the first flap and the second flap at the bottom are firmly connected by sandwiching the first flap from above and below by the second flap and the insertion piece. In addition, the bottom portion of the packaging box of the present invention is formed with a portion in which the second flap, the first flap, the insertion piece, and the inner flap are vertically overlapped four-fold.
Thus, in the packaging box of the present invention, since it is possible to increase the strength of the bottom, even when the heavy contents such as watermelon and the like are stored in the packaging box and lifted, the bottom of the packaging box slips out or the bottom Can be prevented from sagging.

  In the packaging box of the present invention, even if one insertion piece is combined with one insertion hole, the first flap and the second flap can be firmly connected, and the bottom portion can be easily assembled. Can be increased.

  In the packaging box described above, the insertion hole is closed by a closing piece that is continuously provided on the first flap, and the insertion piece is provided between an opening edge portion of the insertion hole and a side edge portion of the closing piece. It is preferable to close the insertion hole by inserting.

  In the packaging box of the present invention, since the strength of the bottom portion can be increased, it is possible to prevent the bottom portion from coming off or the bottom portion from sagging even when the weight of the contents is large. Further, since the bottom portion of the packaging box of the present invention is easily assembled, the work efficiency during assembly can be improved.

It is the perspective view which looked at the packaging box concerning the embodiment of the present invention from the front upper left. It is the perspective view which looked at the packaging box concerning the embodiment of the present invention from the front lower right. It is the figure which showed the blank sheet of the packaging box which concerns on embodiment of this invention. It is the perspective view which looked at the bottom of the packaging box concerning the embodiment of the present invention from the front upper left. It is the figure which showed the packaging box which concerns on embodiment of this invention, and is an AA sectional view of FIG. It is the figure which showed the procedure of assembling the packaging box which concerns on embodiment of this invention, (a) is a perspective view of the step which inserts an insertion piece in an insertion hole, (b) is sectional drawing of the step which folds back an insertion piece. is there.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front-rear, left-right direction is set for convenience of description of the packaging box of the present embodiment, and does not limit the configuration of the packaging box.

As shown in FIG. 1 and FIG. 2, the packaging box 1 of the present embodiment is an A-type cardboard box, and closes the body 10 formed in a rectangular tube shape and the opening on the upper side of the body 10. The lid portion 20 and the bottom portion 30 that closes the lower opening portion of the body portion 10 are provided.
The body portion 10 includes a pair of front and rear end walls 11 and 12 and a pair of left and right side walls 13 and 14, and is formed in a rectangular rectangular tube shape.

As shown in FIG. 3, the packaging box 1 is formed by mountain-folding or valley-folding a blank sheet S obtained by cutting out a single cardboard sheet at each ruled line. The blank sheet S shown in FIG. 3 is arranged so that the inner surface side can be seen.
Each ruled line (folded line) of the blank sheet S is a linear groove formed by pressing the surface of the blank sheet S. In addition, you may form a notch in a ruled line. This makes it easier to fold the blank sheet S along the ruled line.

The front end wall 11 of the present embodiment is formed in a quadrangle as shown in FIG. A right side wall 14 is continuously provided on the right edge of the front end wall 11 via a ruled line L1.
The right side wall 14 extends rearward from the right edge of the front end wall 11. The right side wall 14 is formed perpendicular to the front end wall 11. The right side wall 14 of this embodiment is formed in a quadrangle.

As shown in FIG. 1, a left side wall 13 is connected to the left edge of the front end wall 11 via a ruled line L2.
The left side wall 13 extends rearward from the left edge of the front end wall 11. The left side wall 13 is formed perpendicular to the front end wall 11. The left side wall 13 has the same shape as the right side wall 14 (see FIG. 2).

The rear end wall 12 is connected to the rear edge of the left side wall 13 via a ruled line L3.
The rear end wall 12 extends rightward from the rear edge of the left side wall 13. The rear end wall 12 is formed perpendicular to the left side wall 13. The rear end wall 12 has the same shape as the front end wall 11 (see FIG. 3).

As shown in FIG. 2, a joining piece 15 is continuously provided on the right edge of the rear end wall 12 via a ruled line L4. The joining piece 15 is formed in a strip shape along the right edge portion of the rear end wall 12.
The joining piece 15 is a portion joined to the rear end portion of the inner surface of the right side wall 14 with an adhesive.

  When the joining piece 15 is joined to the inner surface of the right side wall 14 while folding the blank sheet S (see FIG. 3) along the ruled lines L1 to L4, as shown in FIGS. 1 and 2, the front end wall 11, the left side wall 13, the rear end The wall 12 and the right side wall 14 form a quadrangular rectangular tubular body 10.

As shown in FIG. 1, the lid portion 20 includes a pair of front and rear inner flaps 21 and 21 continuously provided on the upper edge portions of the front and rear end walls 11 and 12, and upper edge portions of the left and right side walls 13 and 14. It is formed by a pair of left and right outer flaps 22, which are respectively provided in series.
The left and right outer flaps 22, 22 are superposed on the upper surfaces of the front and rear inner flaps 21, 21, and the leading edge portions of the outer flaps 22, 22 are butted against each other.

As shown in FIG. 2, the bottom portion 30 is formed by a pair of front and rear inner flaps 31, 31 and a first flap 32 and a second flap 35.
The front and rear inner flaps 31, 31 are connected to the lower edges of the front and rear end walls 11, 12 via ruled lines L11, L11, respectively. The front edge portions of the inner flaps 31, 31 are arranged at intervals in the front-rear direction.

A first flap 32 is continuously provided on the lower edge of the right side wall 14 via a ruled line L14. A second flap 35 is continuously provided on the lower edge of the left side wall 13 via a ruled line L13.
The first flap 32 and the second flap 35 are superposed on the lower surfaces of the front and rear inner flaps 31, 31. Further, the front end of the first flap 32 and the front end of the second flap 35 are engaged with each other.

The first flap 32 extends leftward from the lower edge of the right side wall 14. The first flap 32 is formed perpendicular to the right side wall 14. The first flap 32 of this embodiment is formed in a quadrangle (see FIG. 3).
In this embodiment, the left-right length of the first flap 32 is smaller than the left-right length of the body portion 10, as shown in FIG. 4. The tip edge portion 32a (left edge portion) of the first flap 32 is arranged on the left side (on the left side wall 13 side) of the center portion of the body portion 10 in the left-right direction.

  An insertion hole 33 is opened in the first flap 32. The insertion hole 33 of this embodiment is a rectangular opening extending in the front-rear direction (see FIG. 3). The insertion hole 33 is a portion into which an insertion piece 36 connected to a second flap 35 described later is inserted (see FIG. 5).

  As shown in FIG. 4, the insertion hole 33 is arranged between the tip edge portion 32 a of the first flap 32 and the center portion of the first flap 32 in the left-right direction (see FIG. 3). Further, the insertion hole 33 is arranged at the center of the first flap 32 in the front-rear direction.

The insertion hole 33 is closed by a blocking piece 34. The closing piece 34 is formed in the same shape as the opening shape of the insertion hole 33. In the state of the blank sheet S shown in FIG. 3, the closing piece 34 is fitted in the insertion hole 33.
As shown in FIG. 2, the right edge portion of the closing piece 34 (edge portion on the base end side of the first flap 32) is connected to the right edge portion of the insertion hole 33 via the ruled line L15. The front and rear edges and the left edge of the blocking piece 34 are separated from the opening edge of the insertion hole 33.

In this way, the closing piece 34 is connected to the first flap 32 only at the right edge portion (see FIG. 3), and is vertically tiltable with respect to the first flap 32.
Then, by tilting the closing piece 34 with respect to the first flap 32, the insertion hole 33 can be opened (see FIG. 6B).

As shown in FIG. 2, a second flap 35 is continuously provided at the lower edge of the left side wall 13 via a ruled line L13.
The second flap 35 extends rightward from the lower edge portion of the left side wall 13. The second flap 35 is formed perpendicular to the left side wall 13.

The second flap 35 extends leftward from the lower edge of the left side wall 13 (see FIG. 4). The second flap 35 is formed perpendicular to the left side wall 13. The second flap 35 of this embodiment is formed in a substantially rectangular shape (see FIG. 3).
The tip of the second flap 35 overlaps the lower surface of the tip of the first flap 32. The central portion of the tip edge portion 35a (right edge portion) of the second flap 35 overlaps with the left edge portion of the insertion hole 33 (see FIG. 5).

As shown in FIG. 5, an insertion piece 36 is continuously provided in the center of the tip edge portion 35a of the second flap 35 via two ruled lines L16 and L16.
The insertion piece 36 is a portion to be inserted into the insertion hole 33, as shown in FIG. The insertion piece 36 is formed in a quadrangle (see FIG. 3). The width of the insertion piece 36 in the front-rear direction is formed to be the same as the width of the insertion hole 33 in the front-rear direction.

  As shown in FIG. 5, the insertion piece 36 is arranged in the body portion 10 between the opening edge portion of the insertion hole 33 and the side edge portion of the closing piece 34. The intermediate portion 36b between the upper and lower ruled lines L16, L16 is also inserted into the insertion hole 33.

The insertion piece 36 is folded back to the left with respect to the second flap 35 at both ruled lines L16 and L16. The tip edge portion 36 a (left edge portion) of the insertion piece 36 is in contact with the inner surface of the left side wall 13.
An intermediate portion 36b between the ruled lines L16 and L16 is in contact with the inner peripheral surface of the insertion hole 33. The height of the intermediate portion 36b corresponds to the height of the first flap 32.
In this way, the insertion piece 36 overlaps the upper surface of the tip portion of the first flap 32. Further, the inner flap 31 overlaps with the upper surface of the insertion piece 36, and the edge portion of the closing piece 34 overlaps.

The tip portion of the first flap 32 (the portion closer to the tip edge portion 32a than the insertion hole 33) is sandwiched between the upper surface of the second flap 35 and the lower surface of the insertion piece 36. As a result, the tip of the first flap 32 and the tip of the second flap 35 are engaged.
Further, in the left half of the bottom portion 30 of the packaging box 1, a portion in which the second flap 35, the first flap 32, the insertion piece 36, and the inner flap 31 are vertically overlapped in four layers is formed.

Next, a procedure for assembling the bottom portion 30 of the packaging box 1 of this embodiment will be described.
First, the body 10 is formed from the state of the blank sheet S (see FIG. 3) as shown in FIG. Then, as shown in FIG. 6A, the body portion 10 is oriented so that the body portion 10 is upside down. As a result, the lower portion of the body portion 10 is arranged on the upper side.

  Subsequently, the inner flaps 31, 31 are bent with respect to the front and rear end walls 11, 12 (see FIG. 4). In addition, the first flap 32 is bent with respect to the right side wall 14 and overlaps the inner flaps 31 and 31 on the upper side (see FIG. 4).

  Further, the second flap 35 is bent with respect to the left side wall 13, and the insertion piece 36 is inserted into the insertion hole 33 of the first flap 32. At this time, the closing piece 34 in the insertion hole 33 is pushed toward the inside of the body 10.

Then, as shown in FIG. 6B, the insertion piece 36 is folded back with respect to the second flap 35 in a state where the second flap 35 is overlapped with the first flap 32.
At this time, the operator can insert the finger of one hand into the insertion hole 33 and fold the insertion piece 36 back to the second flap 35 with one hand.
Thereby, as shown in FIG. 5, the insertion piece 36 overlaps with the tip end portion of the first flap 32, and the tip end portion of the first flap 32 is sandwiched between the second flap 35 and the insertion piece 36.

  In this way, after the front end of the first flap 32 and the front end of the second flap 35 are engaged, as shown in FIG. 1, the upper and lower sides of the body 10 are returned to the bottom 30 of the packaging box 1. Complete the assembly.

In the packaging box 1 of the present embodiment as described above, as shown in FIG. 5, the second flap 35 and the insertion piece 36 sandwich the tip end portion of the first flap 32 in the vertical direction, so that the bottom portion 30 The first flap 32 and the second flap 35 are firmly connected.
Further, the bottom portion 30 of the packaging box 1 of the present embodiment is formed with a portion in which the second flap 35, the first flap 32, the insertion piece 36, and the inner flap 31 are quadrupled in the vertical direction.
Therefore, in the packaging box 1 of the present embodiment, since the strength of the bottom portion 30 can be increased, the bottom portion 30 of the packaging box 1 can be retained even when a heavy content such as watermelon is stored in the packaging box 1 and lifted. It is possible to prevent the bottom portion 30 from coming off and slackening.

  In the packaging box 1 of the present embodiment, as shown in FIGS. 6A and 6B, by combining one insertion piece 36 with one insertion hole 33, the first flap 32 and the second flap 35. Can be firmly connected. As described above, since the bottom portion 30 is easily assembled, the work efficiency at the time of assembling the packaging box 1 can be improved.

  In the packaging box 1 of the present embodiment, as shown in FIG. 5, since the insertion piece 36 is inserted between the opening edge of the insertion hole 33 and the side edge of the closing piece 34, The insertion hole 33 can be closed.

Although the present embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.
In this embodiment, as shown in FIG. 6A, the insertion hole 32 is formed in the center of the first flap 32, and the rectangular insertion piece 36 is formed in the center of the second flap 35. However, the positions and shapes of the insertion hole 32 and the insertion piece 36 are not limited.
In the present embodiment, the insertion piece 36 is connected to the second flap 35 via the two ruled lines L16 and L16, but the insertion piece 36 is connected to the second flap 35 via one ruled line. It may be connected to.

  In the present embodiment, as shown in FIG. 1, the body portion 10 is formed in the shape of a square rectangular tube, but the shape of the body portion is not limited, and the inclined wall is provided between the end wall and the side wall. May be provided to form the body in a polygonal shape such as a hexagon or an octagon.

  Although the packaging box 1 of the present embodiment is made of corrugated cardboard, the packaging box 1 can be formed of various known paperboards.

1 Packaging Box 10 Body 11 Front End Wall 12 Rear End Wall 13 Left Side Wall 14 Right Side Wall 15 Joining Piece 20 Lid 21 Inner Flap 22 Outer Flap 30 Bottom 31 Inner Flap 32 First Flap 33 Insertion Hole 34 Closing Piece 35 Second Flap 36 Insert S Blank sheet

Claims (2)

A body formed in a rectangular tube shape,
A bottom portion that closes the lower opening of the body portion,
The body has front and rear end walls and left and right side walls,
The bottom is
Front and rear inner flaps connected to the front and rear end walls,
A first flap and a second flap that are continuously provided on the left and right sidewalls and are stacked on the lower surface of the inner flap,
An insertion hole is opened in the first flap,
An insertion piece is continuously provided at the tip of the second flap,
The insertion piece is inserted into the insertion hole, folded back with respect to the second flap, the tip edge portion of the insertion piece is in contact with the inner surface of the side wall ,
The packaging box, wherein a tip end portion of the first flap is sandwiched between an upper surface of the second flap and a lower surface of the insertion piece. The packaging box according to claim 1, wherein
The insertion hole is closed by a blocking piece continuous with the first flap,
The said insertion piece is inserted between the opening edge part of the said insertion hole, and the side edge part of the said closure piece, The packaging box characterized by the above-mentioned.

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