JP3190696U - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box capable of surely maintaining a state in which a body portion is folded flat while suppressing a decrease in strength of a flap or the like. SOLUTION: In a packaging box 1 in which a rectangular opening of a cylindrical body 19 is closed by long side flaps 7 and 8 and short side flaps 9 and 10, it is raised at the tip of long side flaps 7 and 8. A freely folded piece 17 is provided. By folding up the folded piece 17 of one long side flap 8, the end edge of the folded piece 17 and the back end edge of the recess 16 of the other long side flap 7 are frictionally engaged with each other to form a body portion. The folded state of 19 is maintained. [Selection diagram] Fig. 4

Description

  The present invention relates to a packaging box.

  2. Description of the Related Art Conventionally, a rectangular parallelepiped packaging box formed of corrugated paperboard or the like is folded flatly for recycling or disposal after taking out an article to be packaged. Specifically, the upper and lower flaps of the packaging box are opened and the opposite corners of the rectangular cylindrical barrel are bent at an acute angle so that the side wall of the barrel is overlapped and folded flat.

  However, if the packaging box is made of a material with a relatively large bending stiffness such as corrugated paperboard, it will be easy to lift from the state where the side wall of the body part is piled up due to the restoring force, and the flat folded state will be maintained It may not be done. For this reason, there is an inconvenience that when a plurality of packaging boxes folded flat after use are stored or moved in a stacked state, a stable stacked state cannot be obtained and handling is troublesome.

  Therefore, conventionally, a packaging box is known that maintains a state in which the body is folded flat using a flap connected to the upper edge of the body (see Patent Document 1 below).

  In this packaging box, an inner flap is connected to a pair of upper edges that are short sides, and an outer flap is connected to a pair of upper edges that are long sides among the upper edges of a rectangular body in plan view. Yes. On one outer flap, a locking piece is formed by providing a cut from the front end to the base end. When the body is folded flat, the side end of the other outer flap is inserted into the notch, and the locking piece is inserted between the side end of the other outer flap and the inner flap adjacent to the outer flap. In this way, the body is folded and kept in a folded state.

JP 2003-170925 A

  However, since the notch for forming the locking piece is provided from the front end to the base end of one outer flap, even if the side end of the other outer flap is cut, the locking force is Very small. Then, when the body is folded, it has a great restoring force at the corner of the body that is bent at an acute angle. The engagement between the outer flaps may be released.

  In addition, if a cut is formed in the outer flap from its distal end to the proximal end, the strength of the outer flap may be reduced.

  In view of the above-described points, an object of the present invention is to provide a packaging box that can reliably maintain a state in which a body portion is flatly folded while suppressing a decrease in strength of a flap or the like.

  The present invention is a first side plate having a cylindrical body portion that is formed by four side plates that are connected via four corners and that is open in a rectangular shape, and an end edge that is a long side of the opening edge of the body portion. A pair of long side flaps that are connected to each other through a crease line and bend toward the inner side of the body so as to be perpendicular to the first side plate, and an edge that is a short side of the opening edge of the body. A pair of short side flaps that are connected to the second side plate via a crease line and bend inwardly of the body so as to be perpendicular to the second side plate, and a gripping hole is formed in the short side flap. And a recess corresponding to the gripping hole is formed at the front end of each long side flap, and the pair of corners of the trunk portion facing each other by opening both long side flaps and both short side flaps. When the body is folded flat by bending both parts at an acute angle, both long side flaps In the one where the parts overlap each other, the L-shaped cut formed at the tip of the long side flap is provided with a folded piece that can be folded in a direction intersecting the folding direction of the long side flap, By folding the folded piece of the long side flap, the end edge on the first side plate side of the folded piece and the back end edge of the concave portion of the other long side flap are frictionally engaged with each other. The folded state of the part is maintained.

  According to the present invention, when the long side flap is folded at the tip of the long side flap and the body part is folded flatly and a part of both long side flaps are overlapped, one long side flap is folded. By folding the piece, the end edge of the folded piece is frictionally engaged with the back end edge of the concave portion of the other long side flap, so that the state where the body portion is folded flat can be reliably maintained.

  And since the L-shaped cut which forms this folding piece is provided in the front-end | tip part of the long side flap which is a comparatively small area | region, the intensity | strength of a long side flap hardly falls.

  Further, in the present invention, a pinch that is foldable via a crease line extending from the leading edge of the short side flap to the side edge is provided at the corner of the tip of the short side flap. It is preferable to adhere to the outer surface of the long side flap at a position other than the knob at the tip corner.

  According to this, even when the short side flap is adhered to the long side flap and the trunk portion is closed, when the trunk portion is folded flat, the knob is picked and the short side flap is peeled off from the long side flap. This makes it easy to fold the trunk.

  In the present invention, the second side plate includes a break opening portion that opens a part of the body portion by breaking, and the break opening portion breaks a part of one side edge side of the second side plate. It is employed in the process for a packaging box composed of a first breakable part and a second breakable part that is in contact with a part of the first breakable part and breaks a part of the other side edge of the second side plate. be able to.

The perspective view which shows one Embodiment of the packaging box of this invention. The expanded view of the packaging box of FIG. The perspective view which shows the open state of the packaging box of FIG. The perspective view which shows the folding state of the packaging box of this embodiment. The enlarged view of the principal part of FIG.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the packaging box 1 of the present embodiment is formed in a rectangular parallelepiped shape, and stores a plurality of items to be packaged (for example, beverages in PET bottles, etc.) not shown.

  The packaging box 1 is a so-called wrap-around case, and is assembled by corrugated paperboard 2 formed by punching in a generally rectangular shape as shown in FIG.

  The corrugated paperboard 2 includes a bottom plate 3, a front plate 4 connected to the front side edge of the bottom plate 3 via a crease line a, and a rear plate 5 connected to the rear side edge of the bottom plate 3 via a fold line b. And a top plate 6 connected to the front edge of the front plate 4 via a crease line c.

  The front side plate 4 and the rear side plate 5 are formed in the same shape. The bottom plate 3 and the top plate 6 are formed in the same shape. The sizes of the bottom plate 3 and the top plate 6 are smaller than those of the front side plate 4 and the rear side plate 5.

  The front side plate 4 and the rear side plate 5 correspond to the first side plate of the present invention, and the bottom plate 3 and the top plate 6 correspond to the second side plate of the present invention.

  A pair of inner flaps 7 and 8 are connected to the left and right side edges of the front side plate 4 and the rear side plate 5 via crease lines d and e, respectively, and the left and right sides of the bottom plate 3 and the top plate 6 are respectively left and right. A pair of outer flaps 9 and 10 are connected to the side edges via crease lines f and g.

  The inner flaps 7 and 8 correspond to the long side flaps of the present invention, and the outer flaps 9 and 10 correspond to the short side flaps of the present invention.

  The top plate 6 is formed with a rupture opening 11 that is opened when the package is taken out. The breakable opening 11 is constituted by a first breakable part 12 and a second breakable part 13.

  The first breakable portion 12 is formed so as to be detachable from the top plate 6 by three breakable lines h1, h2, h3. Of the three breakable lines h1, h2, h3 forming the first breakable part 12, one breakable line h3 extending in the direction along the crease line c is formed in a wave shape.

  The second breakable portion 13 shares the wavy breakable line h3 forming the first breakable portion 12 with two breakable lines h4 and h5 that coincide with the extension lines of the crease line g, The breakable lines h4 and h5 are formed so as to be separable from the top plate 6 by two breakable lines h6 and h7 connected to the wave-shaped breakable line h3.

  Triangular tabs 14 are formed at the front corners of the outer flaps 9 and 10 via the crease line i. Further, the outer flap 10 connected to the top plate 6 is provided with a cut j for releasing the central portion of the outer flap 10 in order to form a gripping hole 15 (see FIG. 3).

  In addition, the inner flaps 7 and 8 are provided with recesses 16 that are notched corresponding to the gripping holes 15 (see FIG. 3). Furthermore, the inner flaps 7 and 8 are provided with folding pieces 17 that can be folded up from the inner flaps 7 and 8 by a cut k formed at the tip thereof.

  The cut k forming the folded piece 17 is formed in an L shape with a portion extending in a direction orthogonal to the leading edge of the inner flaps 7 and 8 and a portion extending parallel to the leading edge of the inner flaps 7 and 8. Has been. Then, as described later, when the inner flap 7 and the inner flap 8 are superposed by folding the packaging box 1 flat, the folded piece 17 is provided at a position corresponding to the recess 16.

  Further, an adhesive piece 18 bonded to the top plate 6 is connected to the front end edge of the rear side plate 5 via a crease line n.

  When the packaging box 1 shown in FIG. 1 is formed from the corrugated paperboard 2 shown in FIG. 2 having the above-described configuration, a plurality of packages (not shown) are aligned on the bottom plate 3 in the state of the corrugated paperboard 2 shown in FIG. First, the front side plate 4 and the rear side plate 5 are erected through the fold lines a and b, respectively.

  Next, the inner flaps 7 and 8 on both sides of the both side plates 4 and 5 are bent along both side edges of the bottom plate 3 via the crease lines d and e, respectively. Then, the outer flaps 9 provided on both sides of the bottom plate 3 are erected via the crease line f and bonded to the outer surfaces of the inner flaps 7 and 8 via an adhesive. At this time, an adhesive is not applied to the corner portion of the outer flap 9 so that the knob 14 can be picked.

  Subsequently, the top plate 6 is bent horizontally through the crease line c. Next, the adhesive piece 18 is bonded to the inner surface of the top plate 6 via an adhesive. Then, the outer flaps 10 provided on both sides of the top plate 6 are bent downward via the crease line g and bonded to the outer surfaces of the inner flaps 7 and 8 via an adhesive.

  As a result, an article to be packaged is accommodated inside a rectangular tubular body 19 (see FIG. 1) formed by the bottom plate 3, the front side plate 4, the rear side plate 5, and the top plate 6, and the left and right sides of the body portion 19 are the inner flaps 7, 8 and the outer flaps 9 and 10 are closed to form the packaging box 1.

  As shown in FIG. 1, when the packaging box 1 is formed, the cut k of the folded piece 17 provided on the inner flaps 7 and 8 is covered with the outer flaps 9 and 10. According to this, it is possible to reliably prevent the strength of the inner flaps 7 and 8 from being lowered due to the folds and the cut k of the piece 17 being provided.

  Next, the unpacking operation of the packaging box 1 will be described. With reference to FIG. 1, first, the first breakable portion 12 is pressed toward the inner side of the packaging box 1 to break the breakable lines h <b> 1, h <b> 2, h <b> 3 and release them from the top plate 6. Thereby, the breaking edge of the 2nd breakable part 13 which contact | connects the breakable line h3 is exposed.

  Next, the second breakable portion 13 is pulled upward and is broken from the breakable lines h6 and h7 along the breakable lines h4 and h5. As a result, as shown in FIG. 3, the second breakable portion 13 is released from the top plate 6, the upper portion of the body portion 19 is opened, and the unpacked object can be unpacked.

  Next, the dismantling / folding operation of the packaging box 1 after taking out the article to be packaged will be described. From the state shown in FIG. 3, first, the knob 14 at the tip corner of the outer flaps 9, 10 is picked and the outer flaps 9, 10 are peeled outward from the outer surfaces of the inner flaps 7, 8. By providing the knobs 14 on the outer flaps 9 and 10, the operation of separating the outer flaps 9 and 10 from the inner flaps 7 and 8 is facilitated.

  Next, the outer flaps 9 and 10 are opened, and the opposite corners of the rectangular cylindrical body 19 are folded at an acute angle, whereby the packaging box 1 is folded flat as shown in FIG. . At this time, the packaging box 1 according to the present embodiment can be easily formed into a sheet shape by separating the second breakable portion 13 from the top plate 6 in the unpacked state, so that the flat folding operation is extremely smooth. Can be done.

  Thereafter, as shown in FIGS. 4 and 5, the folded piece 17 of the inner flap 8 positioned corresponding to the recessed portion 16 of the inner flap 7 is folded in a direction to enter the recessed portion 16 of the inner flap 7. At this time, the folding direction of the folded piece 17 is a direction intersecting with the folding direction of the inner flap 8 when the body portion 19 is closed.

  By doing so, as shown in FIG. 5, the end edge 17a of the folded piece 17 is frictionally engaged with the inner end edge 16a of the recess 16 of the inner flap 7, and as shown in FIG. The flatly folded state is firmly maintained.

DESCRIPTION OF SYMBOLS 1 ... Packaging box, 3 ... Bottom plate (second side plate), 4 ... Front side plate (first side plate), 5 ... Rear side plate (first side plate), 6 ... Top plate (second side plate), 7, 8 ... Inner flap (Long side flap), 9, 10 ... outer flap (short side flap), 11 ... break opening, 12 ... first breakable portion, 13 ... second breakable portion, 14 ... knob, 16 ... recess, k ... cuts, 17 ... folded pieces, 19 ... body.

Claims (3)

A crease line is formed on a cylindrical body portion that is formed by four side plates that are connected via four corner portions and open in a rectangular shape, and a first side plate that has an end edge that is a long side of the opening edge of the body portion. A second side plate having a pair of long side flaps bent inwardly so as to be perpendicular to the first side plate and an end edge serving as a short side of the opening end edges of the trunk portion A pair of short side flaps that are connected to each other via a crease line and bend in the body part in a direction perpendicular to the second side plate, and a gripping hole is formed in the short side flap, A recess corresponding to the gripping hole is formed at the tip of each long side flap,
When both long side flaps and both short side flaps are opened and a pair of opposite corners of the body part are bent at an acute angle to fold the body part flatly, a part of both long side flaps overlap. In things,
By providing an L-shaped cut formed at the tip of the long side flap, a folding piece is provided that can be folded up in a direction intersecting the bending direction of the long side flap;
By folding the folded piece of one long side flap, the edge of the folded piece on the first side plate side and the back end edge of the concave portion of the other long side flap are frictionally engaged with each other. The packaging box is characterized in that the folded state of the body is maintained.   Provided at the corner of the tip of the short side flap is a foldable knob that can be bent through a crease line extending from the tip edge to the side edge of the short side flap, and the short side flap is the knob at the corner of the tip. The packaging box according to claim 1, wherein the packaging box is adhered to an outer surface of the long side flap at a position other than the position. The second side plate includes a rupture opening that opens a part of the body part by breaking,
The break opening includes a first breakable portion that breaks a portion of one side edge side of the second side plate, and a part of the other side edge side of the second side plate that is in contact with a portion of the first breakable portion. The packaging box according to claim 1, wherein the packaging box is configured by a second breakable portion that breaks the container.