JP5103435B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box formed from a piece of corrugated paperboard punched into a predetermined shape.

  2. Description of the Related Art Conventionally, as this type of packaging box, one having a rectangular tube-shaped support body at four corners of a body portion that stores an object to be packaged is known (see Patent Document 1 below). In this structure, the body portion is formed by raising each side plate connected to the four sides of the rectangular bottom plate with respect to the bottom plate. The rectangular tube-shaped support is formed by bending a belt side connected to the upper edges of a pair of side plates standing up against each other when forming the body portion into a cylindrical shape.

  As described above, since the band side for forming the support is integrally connected to the side plate, the rectangular cylindrical support can be assembled at the same time when the cardboard board is assembled into a box shape. The number of members can be reduced and the cost can be reduced.

JP-A-11-171167

  By the way, since the said conventional packaging box has the side plate connected to each of the four sides of the rectangular bottom plate, when it is unused, a plurality of sheets are stacked and stored and transported. . However, in the above conventional packaging box, when it is in the unfolded state, the band side for forming the rectangular tube-shaped support body projects outward, and the band side is external when transporting etc. Contact with other objects tends to cause damage such as tearing of the band.

  SUMMARY OF THE INVENTION In view of the above, the present invention has an object to provide a packaging box that can be formed from a single sheet of corrugated paperboard and that is low in cost, and that is not easily damaged when assembled and is easy to assemble. And

The present invention is a packaging box formed from a sheet of corrugated paperboard punched into a predetermined shape, wherein a pair of first side plates and a pair of second side plates are alternately arranged via a crease line in one direction. By connecting the first side plate and the second side plate located at the end by bending the first side plate and the second side plate at right angles along each crease line, the first side plates are connected to each other. And the second side plates are opposed to each other, and a rectangular cylindrical body portion is formed. The bottom portion is closed by a bottom plate flap connected to the lower edge of each of the first and second side plates, and an article to be packaged is contained in the body portion. 4 corner support portions formed in four corners inside the barrel portion and abutting against an object to be packaged in the barrel portion, and connected to upper edges of both first side plates. A pair of top plate flaps for closing the upper portion of the body portion, and two of the corner support portions. First corner support portions of the pair via a first coupling piece which is continuously provided via a fold line to the upper edge of one side of the second side plate, the folding lines to the upper edge of the first connecting piece communicating A first opposing piece, and a first strip that is connected to a side edge of the first opposing piece via a fold line and extends toward the other side of the second side plate along the second side plate; A pair of second corner support portions that are the other two of the corner support portions, and a second connecting piece that is connected to the upper edge of the other side of each second side plate via a fold line. A polymer piece connected to the upper edge of the second connecting piece via a fold line; a second counter piece connected to the upper edge of the polymer piece via a crease line; and the second counter piece A second strip that is connected to the side edge of the second strip through the crease line, and is located outside the first strip and extends toward the one side of the second side plate along the second side plate; The first strip is Extending along between the second side plate and the second strip spaced apart from each other by a coupling piece, wherein the first corner support portion, bending the first connecting piece inwardly, the first facing plate the bent downward is opposed to the second side plate is formed with an end portion of the in fold bending first strip the first strip to the polygonal tubular by coupling to the first facing plate, the The second corner support part bends the second connecting piece inward, superimposes the second facing piece on the overlapped piece, and folds the overlapped piece downward to make the second facing piece on the second side plate. It is opposed, characterized by being formed in a polygonal tube shape by connecting the end of the second strip to the second strip and in fold bending the second facing plate.

When the packaging box of the present invention is formed from a single piece of corrugated paperboard, first, each first side plate and each second side plate are bent along each fold line, and the edges of the first side plate and the second side plate at the end portion The parts are connected by, for example, bonding to form a square cylindrical body. Next, each bottom plate flap is folded horizontally to close the lower part of the body. Then, the gel piece folding each first coupling piece and the second connecting piece to the horizontal. Next, each first facing piece is bent downward so as to face the second side plate. Moreover, each 2nd opposing piece is superposed | polymerized on each superposition | polymerization piece, and is made to oppose a 2nd side board by bending each superposition | polymerization piece below. Furthermore, it forms each first strip and the second strip to the polygonal tubular. This Ushite, four corner support portions at the four corners of the inside of the body portion is formed.

  As described above, each side plate, each flap, and each piece can be bent along the crease line to assemble and form a packaging box in which four corner support portions are provided at the four corners inside the body portion. The work is easy, and the packaging box can be formed from a single cardboard board, so that the cost is lower than that formed by a plurality of members.

Moreover, according to the said structure, in the expansion | deployment state, each piece for forming a corner support part can be provided without interfering with two top-plate flaps, Between two top-plate flaps in a deployment state Each piece for forming the corner support portion can be disposed.

  Since the packaging box of the present invention has a shape in which the upper and lower sides of the rectangular cylindrical body are closed by the flaps, the packaging box can be made flat after the body is formed. That is, without folding the top plate flap and the bottom plate flap with respect to each side plate, with the upper and lower portions of the body part opened, one diagonal corner of the body part is bent at an acute angle to make it flat and stored. Can be stacked and bundled during transportation. At this time, if each piece for forming the corner support portion is disposed between the two top plate flaps in the unfolded state according to the present invention, each piece forming the corner support portion is extended outward. Since it can be superposed on the top plate flap without any damage, even if each piece forming the corner support portion is in the unfolded state, damage such as tearing can be prevented.

Further, according to the present invention, the first strip extends between the second strip and the second side plate that are separated from each other by the superposed strip. The second strip can be extended sufficiently long without interfering with each other. For this reason, a comparatively big corner support part can be formed and a to-be-packaged object can be supported reliably.

The perspective view which shows the packaging box of embodiment of this invention. The expanded view of the packaging box of FIG. The top view which shows the packaging box of the state which folded the trunk | drum flatly. Explanatory drawing which shows the assembly operation | work of a 1st corner support part. Explanatory drawing which shows the assembly operation of a 2nd corner support part .

  The packaging box 1 of this embodiment is formed of corrugated paperboard, and as shown in an open state in FIG. 1, a rectangular tubular body 2 and four corners formed at four corners of the body 2. And support portions (two first corner support portions 3a and two second corner support portions 3b).

  The body portion 2 is formed by a pair of first side plates 4 facing each other and a pair of second side plates 5 facing each other in a direction orthogonal to the facing direction of the first side plates 4, and four bottom plate flaps described later. 6 closes the bottom.

  A circular package (not shown) (for example, a long tube wound around and bundled in a circular shape) is accommodated in the body 2. Each corner support part 3a, 3b is formed in the shape of a triangular cylinder, and contacts the outer periphery of the article to be packaged at the four corners of the body part 2. Thereby, the movement of the article to be packaged stored in the body part 2 is restricted, and the object to be packaged is supported in the body part 2.

  As shown in the unfolded state in FIG. 2, the packaging box 1 is punched out of rectangular corrugated paperboard, and a pair of first side plates 4 and a pair of second side plates 5 are alternately arranged via a crease line. Are connected in one direction. A top plate flap 7 is connected to the upper edge of the first side plate 4 via a crease line. A bottom plate flap 6 is connected to the lower edges of the first side plate 4 and the second side plate 5, respectively. Further, in FIG. 2, an adhesive piece 8 is continuously provided on the first side plate 4 at the left end portion through a crease line.

  In FIG. 2 of the second side plate 5, a first connecting piece 9 is connected to the upper edge of the left end portion via a fold line, and a second connecting piece 10 is connected to the upper edge of the right end portion via a fold line. Furthermore, a flap receiving piece 11 is connected between the connecting pieces 9 and 10 via a crease line.

  A first opposing piece 12 is connected to the upper edge of the first connecting piece 9 via a crease line, and the first strip 13 is connected to the right edge of the first opposing piece 12 in FIG. It is installed. The first strip 13 extends along the second side plate 5 and includes a single crease line formed in the intermediate portion and a first locking groove 14 formed in the tip portion. On the left edge of the first facing piece 12, a first locking step portion 15 that is locked by the first locking groove 14 is formed. Each of the first connecting piece 9, the first opposing piece 12, and the first strip 13 is provided to form the first corner support portion 3a.

  A polymer piece 16 is connected to the upper edge of the second connecting piece 10 via a crease line. A second opposing piece 17 is connected to the upper edge of the overlapping piece 16, and a second strip 18 is connected to the left edge of the second opposing piece 17 in FIG. 2 via a crease line. The second strip 18 extends along the second side plate 5 and includes one crease line formed at the intermediate portion and a second locking groove 19 formed at the tip portion. On the right edge of the overlapping piece 16 and the second facing piece 17, a second locking step portion 20 is formed to which the second locking groove 19 is locked. Each of the second connecting piece 10, the overlapping piece 16, the second facing piece 17, and the second strip 18 is provided to form the second corner support portion 3b.

  In the unfolded state shown in FIG. 2, the second strip 18 is provided outside the first strip 13 by the second facing piece 17 being connected to the second connecting piece 10 via the overlapping piece 16. It is done. Each piece for forming the first corner support portion 3 a and the second corner support portion 3 b is formed so as to be accommodated between the pair of top plate flaps 7.

  The packaging box 1 is assembled and formed as follows. First, in order to form the body portion 2, the second side plate 5 at the right end in FIG. 2 is folded and superposed on the first side plate 4 adjacent to the left side thereof, and the first side plate 4 at the left end is adjacent to the right side thereof. The first side plate 4 and the second side plate 5 that are folded back and superposed on the second side plate 5 are bonded together via an adhesive piece 8.

  Thereby, as shown in FIG. 3, the trunk | drum 2 is formed in a flat state. In this state, a plurality of packaging boxes 1 are stacked and stored and transported. At this time, as described above, each piece for forming the first corner support portion 3a and the second corner support portion 3b is formed so as to be accommodated between the pair of top plate flaps 7. Since the pieces for forming the first corner support portion 3a and the second corner support portion 3b do not protrude around the flat packaging box 1, contact from the outside to the pieces is prevented. Can prevent its damage.

  Next, the body portion 2 is expanded into a square cylinder shape, and the bottom plate flap 6 is bent horizontally to close the bottom portion of the body portion 2. The bottom plate flaps 6 are connected and fixed to each other with a stapler or an adhesive tape to maintain the closed state of the body 2.

  Subsequently, the first corner support portion 3a is formed. That is, as shown in FIG. 4A, first, the first strip 13 is bent outward with respect to the first opposing piece 12. Further, the first strip 13 is bent along the fold line at the intermediate portion. Then, the first locking groove 14 of the first strip 13 is locked to the first locking step 15 of the first facing piece 12. Thereby, as shown in FIG.4 (b), the triangular-cornered 1st corner support part 3a is formed.

  Next, the first connecting piece 9 is bent horizontally inward of the body portion 2, and the first facing piece 12 is bent downward with respect to the first connecting piece 9 to face the inner surface of the second side plate 5. Thereby, as shown in FIG.4 (c), the 1st corner support part 3a of a triangular cylinder shape is formed in the corner | angular part in the trunk | drum 2 formed with the 1st side plate 4 and the 2nd side plate 5. As shown in FIG.

  Subsequently, the second corner support portion 3b is formed. That is, as shown in FIG. 5A, from the state where the second connecting piece 10, the overlapping piece 16, and the second opposing piece 17 stand above the second side plate 5, as shown in FIG. The second opposing piece 17 is bent with respect to the superposed piece 16, and the second opposing piece 17 is further superposed on the superposed piece 16. And as shown in FIG.5 (c), the 2nd strip 18 is bend | folded outside with respect to the 2nd opposing piece 17, and the 2nd strip 18 is bent along the fold line of the intermediate part. Then, the second locking groove 19 of the second strip 18 is locked to the second locking step 20 of the second facing piece 17. As a result, a triangular cylindrical second corner support portion 3b having the same shape as the first corner support portion 3a is formed.

  Next, the second connecting piece 10 is bent horizontally toward the inner side of the body portion 2, the overlapping piece 16 is further bent downward with respect to the second connecting piece 10, and the second facing piece 17 is formed on the inner surface of the second side plate 5. Make them face each other. As a result, as shown in FIG. 5 (d), a triangular-cornered second corner support portion 3 b is formed at a corner portion in the body portion 2 formed by the first side plate 4 and the second side plate 5.

  At this time, as shown in FIG. 2, the first strip 13 and the second strip 18 are extended in parallel in the unfolded state, so that the four corner support portions 3a and 3b are formed as shown in FIG. A relatively large triangular cylinder can be formed.

  And after storing a to-be-packaged object in the trunk | drum 2 of the packaging box 1 assembled as mentioned above, the top-plate flap 7 is bent horizontally and the upper part of the trunk | drum 2 is obstruct | occluded, It becomes a packaging state.

  In the present embodiment, the corner support portions 3a and 3b are formed in a triangular tube shape by providing one crease line in the middle portion of each of the strips 13 and 18. Not only, but by providing a plurality of crease lines at predetermined intervals on each of the strips 13 and 18, a polygonal corner support portion such as a rectangular tube shape can be formed, although not shown.

Further, in the present embodiment, as shown in FIG. 2, the first strip 13 and the second strip 18 are extended in parallel in the unfolded state, whereby the corner support portions 3a and 3b having relatively large shapes are provided. formed that it has. And each piece which forms each corner support part 3a, 3b in a flat state is accommodated between a pair of top plate flaps 7, and does not protrude outside, and can prevent damage at the time of storage and transportation. .

DESCRIPTION OF SYMBOLS 1 ... Packaging box, 2 ... Body part, 3a ... 1st corner support part (corner support part), 3b ... 2nd corner support part (corner support part), 4 ... 1st side plate, 5 ... 2nd side plate, 6 ... Bottom plate flap, 7 ... Top plate flap, 9 ... First connecting piece, 10 ... Second connecting piece, 12 ... First opposing piece, 13 ... First strip piece, 16 ... Superposed piece, 17 ... Second opposing piece, 18 ... second strip.

Claims (1)

A packaging box formed from a piece of corrugated paperboard punched into a predetermined shape,
A pair of first side plates and a pair of second side plates are alternately arranged via a crease line and are continuously provided in one direction so that the first side plate and the second side plate are perpendicular to each other along the crease line. By connecting the first side plate and the second side plate that are bent and located at the end portion, a rectangular tubular body is formed in which the first side plates and the second side plates face each other, and each first side plate is formed. In the case where the bottom portion is closed by the bottom plate flap provided continuously to the lower edge of the second side plate and the article to be packaged is accommodated in the trunk portion,
Four corner support portions in the form of polygonal cylinders that are formed at the four corners inside the barrel portion and come into contact with an article to be packaged in the barrel portion, and the upper portions of the barrel portions that are connected to the upper edges of the first side plates. A pair of top plate flaps to close,
A pair of first corner support portions, which are two of the corner support portions, includes a first connection piece continuously connected to an upper edge of one side of each second side plate via a crease line, and the first connection A first opposing piece continuously provided on the upper edge of the piece via a crease line; and a side edge of the first opposing piece provided on a side of the fold line, and extending along the second side plate of the second side plate. A first strip extending toward the other side,
A pair of second corner support portions, which are the other two of the corner support portions, include a second connecting piece continuously connected to the upper edge of the other side of each second side plate via a crease line, Two overlapping pieces connected to the upper edge of the connecting piece via a crease line; a second opposing piece connected to the upper edge of the overlapping piece via a crease line; and a side edge of the second opposing piece And a second strip extending outside the first strip and extending toward the one side of the second side plate along the second side plate,
The first strip extends along the second strip and the second side plate that are separated from each other by the superposed strip,
It said first corner support portion, bending the first connecting piece inwardly, by bending the first facing plate downward is opposed to the second side plate, the first bend Ri folding said first strip It is formed into a polygonal cylinder by connecting the end of the strip to the first opposing piece,
The second corner support part bends the second connecting piece inwardly, superimposes the second opposing piece on the superposed piece, and folds the superposed piece downward to make the second opposing piece be the second side plate. packaging box are opposed, characterized by being formed in a polygonal tube shape by connecting the end of the second strip to the second strip in fold bending the second opposing piece.

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