JP2016003025A - Cardboard box and packing container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cardboard box and a packing container storing an article in the cardboard box, in which inner flaps hardly damage a bag when storing a resin bag loaded with a liquid, and boxes are easily stabilized even when a plurality of cardboard boxes are stacked.SOLUTION: A cardboard box 10A comprises a trunk T consisting of a plurality of side plates 2A, 2B, 2C, 2D, and bottom flaps 4A, 4B, 4C, 4D extended from upper and lower end edges of each side plate 2A, 2B, 2C, 2D. The bottom flaps 4A, 4B, 4C, 4D comprise inner flaps 4A, 4C adjacent to an internal space of the trunk T, and outer flaps 4B, 4D adjacent to an external space. Projections 5 L, 5R are provided on the side faces of the inner flaps 4A, 4C. Receiving parts 6 for receiving the projections 5 L, 5R are provided in the lower end vicinities of the side plates 2B, 2D.

Description

  The present invention includes a trunk portion including a plurality of side plates, and a bottom flap extending from at least a lower end edge of each side plate, and the bottom flap includes an inner flap adjacent to the inner space of the trunk portion, and an outer space. And a packaging container in which articles are stored in the cardboard box.

  As prior art document information related to this type of cardboard box, there is Patent Document 1 shown below. The corrugated cardboard box described in Patent Document 1 is formed by inserting an insertion piece provided in the vicinity of the tip of the outer flap into a notch provided in the inner flap, and without using a staple or an adhesive. Since the inner flap is integrated with the inner flap, the inner flap does not float up and can be assembled in a fixed state.

  Furthermore, in the bottom-mounted state, the insertion piece is squeezed outward along the main body of the inner flap by squeezing with a restraining piece provided on the inner flap, so that storage items such as vegetables are inserted pieces It is said that it is hard to be damaged by.

JP 2000-355321 A (paragraphs 0016 to 0018, FIG. 2)

  However, in the cardboard box described in Patent Document 1, there are no sharp protrusions such as staples in the internal space of the body portion, but the restraining piece provided on the inner flap and the insertion piece provided on the outer flap. Has entered the internal space of the body portion, for example, when a resin bag filled with liquid is stored, the bag may be damaged.

  Moreover, in the cardboard box described in Patent Document 1, since it is necessary to bend the insertion piece in advance, there is a problem in that the production efficiency when assembling the cardboard box is low and it is difficult to automate the assembly.

  Furthermore, in the corrugated cardboard box described in Patent Document 1, there is a problem that a gap that allows a small-sized product to enter between the inner flap and the outer flap, and the insertion piece or the restraining piece protrudes inside the box. As a result, there is a problem that it is difficult to arrange the stored items flat on the bottom as a result of the formation of relatively concavity and convexity on the inner surface of the bottom of the box.

  Accordingly, an object of the present invention is to provide a corrugated cardboard box that prevents the bag from being damaged from the tip of the inner flap even when a resin bag filled with a liquid is stored by preventing the inner flap from lifting up. There is. Another object of the present invention is to provide a cardboard box that has high production efficiency when assembling the cardboard box and can easily automate the assembly process. Furthermore, another object of the present invention is to prevent the inner flap from lifting up, so that a gap is not easily formed between the inner flap and the outer flap, and the stored items can be arranged relatively flatly. An object of the present invention is to provide a packaging container that stores articles in a cardboard box.

The characteristic configuration of the cardboard box according to the present invention is:
A body portion comprising a plurality of side plates; and a flap extending from a lower end edge and an upper end edge of each side plate, wherein the flap is adjacent to an inner space of the body portion and an outer space. A cardboard box having an outer flap,
A protrusion is provided on at least one side surface or end surface of the inner flap extended from the lower edge of the side plate and the upper flap of the side plate, and receives the protrusion. The receiving part is in the point provided on the side plate.

  In the corrugated cardboard box having the above characteristic configuration, when assembling the corrugated cardboard box, the protrusions provided on the side surface or the end face of the inner flap are engaged with the receiving parts provided on the side plate, so that the inner flap is perpendicular to the side plate. Can be fixed in a proper posture. As a result, for example, when a protrusion is provided on the inner flap (on the bottom side) that extends from the lower edge of the side plate, it floats toward the inside of the trunk when storing the stored item in the cardboard box. The possibility that the stored items are damaged by the inner flap is particularly suppressed. In addition, since the tip of the protrusion provided on the side surface or the end surface of the inner flap is captured by the receiving portion provided on the side plate, the bag is damaged and bitten even when a resin bag filled with liquid is stored. The risk of receiving is also suppressed. In addition, when a protrusion is provided on the inner flap (on the lid) that extends from the upper edge of the side plate, the inner flap and the outer flap can be connected continuously because only the inner flap can be closed. Compared with the conventional form which requires a closing operation, the possibility that a part of a resin bag filled with liquid (example of stored items) is sandwiched between the left and right inner flaps is particularly suppressed.

Further, in the cardboard box having the above-described characteristic configuration, the inner flap is fixed only by engaging the protrusion provided on the side surface or the end surface of the inner flap with the receiving portion provided on the side plate. Production efficiency during assembly is high, and automation of the assembly process can be realized relatively easily.
Further, in the corrugated cardboard box having the above-described characteristic configuration, by preventing the inner flap from being lifted, it is difficult for a gap to be formed between the inner flap and the outer flap, and further, means for fixing the inner flap is provided in the box. Since it does not protrude inward, it became possible to arrange the items flat on the bottom.

  Another characteristic configuration of the present invention is that the receiving portion is formed by a through hole.

  If it is this structure, since the receiving part provided in the side plate took the form which penetrated toward the outer surface from the inner surface of the side plate, since sufficient depth was obtained, it was provided in the side surface of the inner flap. The protruding portion is easily and reliably retained in the receiving portion, and the floating of the inner flap is easily further suppressed.

  Also, with this configuration, when the cardboard box is assembled, it is confirmed from the outside through the through hole-shaped receiving portion that the protrusion provided on the side surface of the inner flap is locked in the receiving portion. Because it can, it is easy to improve the accuracy of assembly.

  Another characteristic configuration of the present invention is that the receiving portion is constituted by a recess facing the internal space.

  With this configuration, since the receiving portion for engaging the protrusion provided on the side surface of the inner flap is not exposed to the outside of the cardboard box, it is easy to maintain the strength of the cardboard box high, and the appearance of the cardboard box It is easy to keep high.

  Another feature of the present invention is that the protrusion is provided at the tip of the side surface of the flap.

  In this configuration, the projections provided on the two opposing flaps are in very close positions when assembling the cardboard box, so that the operation of locking each projection to the receiving portion can be performed with one hand. At the same time, making assembly easier.

  The characteristic configuration of the packaging container according to the present invention is that it includes a cardboard box having the above-described characteristic configuration and a resin bag-like content container accommodated in the cardboard box.

  In the packaging container having the above-described characteristic configuration, since it is housed in the cardboard box, the possibility that the resin-bag-like contents container is sandwiched between inner flaps or the like and is damaged is suppressed. Even if a liquid bag is filled with a liquid container, it can be transported and stored safely.

It is a perspective view which shows the usage example of the cardboard box by 1st Embodiment of this invention. It is an expanded view of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the usage example of the cardboard box by 2nd Embodiment of this invention. It is an expanded view of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the usage example of the cardboard box by 3rd Embodiment of this invention. FIG. 16 is a development view of the cardboard box shown in FIG. 15. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the sealing process of the cardboard box shown in FIG. It is a perspective view which shows the assembly process of the cardboard box by another embodiment. It is a perspective view which shows the assembly process of the cardboard box by another embodiment. FIG. 24 is a perspective view showing one non-penetrating receiving portion in FIG. 23. It is AA arrow sectional drawing in FIG. It is a perspective view which shows the perforation for forming a non-penetrating receiving part.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
[First Embodiment]
The corrugated cardboard box 10A shown in FIG. 1 is assumed to be a resin inner body 20 filled with liquid or the like as a stored item, as shown in FIG. Yes.

  As can be understood from FIG. 2 showing the development of the cardboard box 10A, the cardboard box 10A is integrated with the four side plates 2A, 2B, 2C, 2D and the upper and lower ends of the side plates 2A, 2B, 2C, 2D. And cover plates 3A, 3B, 3C, 3D and bottom plates 4A, 4B, 4C, 4D (an example of a bottom flap). A margin part 2F that is joined to the outer peripheral surface of the side plate 2D located at the right end is extended from one end of the side plate 2A located at the left end in FIG.

  Boundary lines between the side plates 2A, 2B, 2C, 2D, boundary lines between the side plates 2A and the adhesive margin 2F, boundary lines between the side plates 2A, 2B, 2C, 2D and the cover plates 3A, 3B, 3C, 3D, and A ruled line AL (such as a ruled line) for determining a bending position is formed in advance on the boundary lines of the side plates 2A, 2B, 2C, 2D and the bottom plates 4A, 4B, 4C, 4D by machining.

  Among the cover plates 3A, 3B, 3C, 3D and the bottom plates 4A, 4B, 4C, 4D, the cover plates 3A, 3C and the bottom plates 4A, 4C having a short ruled line AL are adjacent to the internal space of the box after the box is assembled. Cover plates 3B and 3D and bottom plates 4B and 4D, which are provided as inner flaps and have longer ruled lines AL, are provided as outer flaps adjacent to the external space after the box is assembled.

  Rectangular protrusions 5L and 5R are integrally formed on the left and right end faces of the inner flaps of the bottom plates 4A and 4C, while the protrusions 5L and 5R are provided on the inner flaps of the cover plates 3A and 3C. Not. And the receiving part 6 which can receive protrusion part 5L, 5R of bottom plate 4A, 4C is formed in the center vicinity of the lower end of side plate 2B, 2D.

  In this embodiment, the protrusions 5L and 5R are provided in the vicinity of the ends of the left and right sides of the bottom plates 4A and 4C (inner flaps), and the receiving part 6 is provided with two protrusions 5R and 5L provided on different inner flaps. It is comprised as a single through-hole which receives simultaneously.

  As will be described later, the receiving portion 6 may be realized not as a through hole but as a non-penetrating recess such as an intermediate hole or a crushing hole.

  In the corrugated cardboard cut into a shape as shown in FIG. 2, the margin part 2F is joined to the end of the side plate 2D (by gluing or stapling), for example, a vertical ruled line at the boundary between the side plate 2A and the side plate 2B. Delivered to the filling plant in a state of being folded flat along the AL and the vertical ruled line AL at the boundary between the side plate 2C and the side plate 2D.

  Thereafter, the four side plates 2A, 2B, 2C, 2D adjacent to each other are bent at right angles by a box making apparatus of a filling factory, and the cylindrical body T is formed by the side plates 2A, 2B, 2C, 2D. Formed (see FIG. 3).

  Next, the cylindrical body portion T is turned upside down, and the two bottom plates 4A and 4C (inner flaps on the bottom side) are folded in a valley fold along the horizontal ruled line AL, so that the protrusions 5R of the bottom plates 4A and 4C. , 5L are engaged with the upper receiving portion 6 so that the bottom plates 4A and 4C can be held in a closed posture.

  In this operation, FIG. 4 shows a step-by-step method in which one bottom plate 4C is folded in a valley along the horizontal ruled line AL, and only the projections 5R and 5L of the bottom plate 4C are engaged with the corresponding receiving portions 6. Although shown, both the bottom plates 4A and 4C may be bent at the same time, and the protrusions 5R and 5L of both the bottom plates 4A and 4C may be engaged with the receiving portion 6 at the same time.

  Next, the remaining two bottom plates 4B, 4D (bottom outer flaps) are folded in a valley fold along the horizontal ruled line AL and the vicinity of the boundary between the two bottom plates 4B, 4D is sealed with adhesive tape K Then, the bottom of the cardboard box 10A is completed (see FIG. 5).

  FIG. 1 shows a state in which the corrugated cardboard box 10A with the bottom thus completed is turned upside down again and the resin interior body 20 filled with liquid or the like is accommodated in the body T. .

  The two bottom plates 4A and 4C (bottom inner flaps) overlapped with the two bottom plates 4B and 4D (bottom outer flaps) by the action of the protrusions 5R and 5L engaged with the receiving portion 6. Since the posture is maintained, the bottom plates 4A and 4C as the inner flaps do not float toward the inside of the trunk portion T.

  After storing the interior body 20 in this way, the two lid plates 3A, 3C (inner flaps on the lid side) are folded in a valley fold along the horizontal ruled line AL to close the upper portion of the body T, Two lid plates 3B, 3D (outer flaps on the lid side) are folded in a valley fold along the horizontal ruled line AL so that they overlap with the lid plates 3A, 3C, and the boundary between the two lid plates 3B, 3D When the vicinity is sealed with the adhesive tape K, the upper surface of the cardboard box 10A is closed, and the packaging of the interior body 20 is completed (see FIG. 7).

[Second Embodiment]
Since the cardboard box 10B according to the second embodiment shown in FIGS. 8 to 14 has many common points with the cardboard box 10A according to the first embodiment, the following mainly differs from the cardboard box 10A according to the first embodiment. Explain the point.

  As can be understood from FIG. 9 showing the developed view, in the cardboard box 10B according to the second embodiment, rectangular protrusions 5L and 5R are integrally formed on the end surfaces of the left and right side surfaces of the inner flaps of the cover plates 3A and 3C. On the other hand, the protrusions 5L and 5R are not provided on the inner flaps of the bottom plates 4A and 4C. In the vicinity of the center of the upper ends of the side plates 2B and 2D, a receiving portion 6 that can receive the projections 5L and 5R of the lid plates 3A and 3C is formed.

  In this embodiment, the protrusions 5L and 5R are provided in the vicinity of the front ends of the left and right side surfaces of the cover plates 3A and 3C (inner flaps), and the receiving part 6 has two protrusions 5R and 5R provided on different inner flaps. It is configured as a single through hole that simultaneously receives 5L.

  In FIG. 10, the four side plates 2A, 2B, 2C, 2D are bent along, for example, a valley fold along the vertical ruled line AL, and the adhesive margin portion 2F is joined to the end portion of the side plate 2D, whereby the side plates 2A, 2B are joined. , 2C, 2D shows a state where a cylindrical body T is formed.

  FIG. 11 shows that the cylindrical body T obtained in FIG. 10 is turned upside down, and the two bottom plates 4A and 4C (inner flaps on the bottom side) are folded by valley fold along the horizontal ruled line AL. The process in the middle of closing 4A and 4C is shown.

  In FIG. 12, the remaining two bottom plates 4B and 4D (outer flaps on the bottom side) are then folded in a valley fold along the horizontal ruled line AL, and the adhesive tape is attached near the boundary between the two bottom plates 4B and 4D. By sealing with K, the bottom of the cardboard box 10B is completed.

  FIG. 8 shows a state in which the corrugated cardboard box 10 </ b> B whose bottom has been completed in this way is turned upside down again and the resin interior body 20 filled with liquid or the like is stored in the body T. .

  After the interior body 20 is stored, the two cover plates 3A and 3C (inner flaps on the cover side) are folded in a valley fold along the horizontal ruled line AL, and the protrusions 5R and 5L of the cover plates 3A and 3C are at the upper ends. When engaged with the receiving portion 6 on the side, the cover plates 3A and 3C can be held in a closed posture (see FIG. 13 showing the intermediate stage).

  Subsequently, the two lid plates 3B and 3D (outer flaps on the lid side) are folded in a valley fold along the lateral ruled line AL so as to overlap with the lid plates 3A and 3C. When the vicinity of the boundary between 3Ds is sealed with the adhesive tape K, the upper surface of the cardboard box 10B is closed and the packaging of the interior body 20 is completed (see FIG. 14).

[Third Embodiment]
Since the cardboard box 10B according to the third embodiment shown in FIGS. 15 to 21 also has many common points with the cardboard box 10A according to the first embodiment, the following mainly differs from the cardboard box 10A according to the first embodiment. Explain the point.

  As can be understood from FIG. 16 showing the developed view, in the corrugated cardboard box 10C according to the third embodiment, rectangular protrusions are formed on the left and right end surfaces of the inner flaps of the cover plates 3A, 3C and the bottom plates 4A, 4C. The parts 5L and 5R are integrally formed. Accordingly, receiving portions 6 that can receive the projections 5L and 5R of the cover plates 3A and 3C and the bottom plates 4A and 4C are formed near the centers of the upper and lower ends of the side plates 2B and 2D, respectively.

  In this embodiment, the protrusions 5L and 5R are provided in the vicinity of the tips of the left and right side surfaces of the cover plates 3A and 3C (inner flaps) and the bottom plates 4A and 4C (inner flaps), and the receiving portion 6 has a different inner flap. It is configured as a single through-hole that simultaneously receives the two provided protrusions 5R and 5L.

  FIG. 17 shows that the four side plates 2A, 2B, 2C, 2D are bent along, for example, a valley fold along the longitudinal ruled line AL, and the adhesive margin portion 2F is joined to the end portion of the side plate 2D, whereby the side plates 2A, 2B are joined. , 2C, 2D shows a state where a cylindrical body T is formed.

  Next, as illustrated in FIG. 18, the cylindrical body portion T is turned upside down, and the two bottom plates 4A and 4C (inner flaps on the bottom side) are bent along the horizontal ruled line AL by valley folds, By engaging the protrusions 5R and 5L of the bottom plates 4A and 4C with the upper receiving portion 6, the bottom plates 4A and 4C can be held in a closed posture.

  In this operation, FIG. 18 shows a stepwise method in which one bottom plate 4C is folded in a valley along the horizontal ruled line AL, and only the projections 5R and 5L of the bottom plate 4C are engaged with the corresponding receiving portions 6. Although shown, both the bottom plates 4A and 4C may be bent at the same time, and the protrusions 5R and 5L of both the bottom plates 4A and 4C may be engaged with the receiving portion 6 at the same time.

  Next, FIG. 19 shows that the remaining two bottom plates 4B and 4D (bottom outer flaps) are folded in a valley fold along the horizontal ruled line AL, and the vicinity of the boundary between the two bottom plates 4B and 4D is adhesive tape. By sealing with K, the bottom of the cardboard box 10C is shown completed.

  FIG. 15 shows a state in which the corrugated cardboard box 10 </ b> C whose bottom has been completed in this manner is turned upside down again and the resin interior body 20 filled with liquid or the like is stored in the body T. .

  After the interior body 20 is stored, the two cover plates 3A and 3C (inner flaps on the cover side) are folded in a valley fold along the horizontal ruled line AL, and the protrusions 5R and 5L of the cover plates 3A and 3C are at the upper ends. When engaged with the receiving portion 6 on the side, the cover plates 3A and 3C can be held in a closed posture (see FIG. 20 showing the intermediate stage).

  Subsequently, the two lid plates 3B and 3D (outer flaps on the lid side) are folded in a valley fold along the lateral ruled line AL so as to overlap with the lid plates 3A and 3C. When the vicinity of the boundary between 3Ds is sealed with the adhesive tape K, the upper surface of the cardboard box 10C is closed, and the packaging of the interior body 20 is completed (see FIG. 21).

[Another embodiment]
<1> As illustrated in FIG. 22, the protrusions 5L and 5R of the inner flaps (here, the bottom plates 4A and 4C) are implemented in a form in which the protrusions 5L and 5R are arranged not in the end portions in the side surfaces of the inner flaps. Is also possible. In this case, as shown in FIG. 22, the receiving part 6 that receives the protrusions 5L and 5R can be formed as two receiving parts 6 that are separated from each other along the horizontal ruled line AL.

<2> As illustrated in FIG. 23, the receiving portion 6 that receives the protruding portions 5L and 5R can be implemented as a non-penetrating recess. In this case, since the receiving part 6 and the protrusions 5L and 5R are not exposed to the outside of the cardboard box 10, the strength of the cardboard box 10 can be easily maintained, and the appearance of the cardboard box 10 can be easily maintained.

FIG. 24 is a partially enlarged view showing the vicinity of the non-penetrating receiving portion 6 formed on the inner surface side of the side plate 2D in FIG. FIG. 25 is a cross-sectional view showing the vicinity of the non-penetrating receiving portion 6 in FIG.
As illustrated in FIG. 25, the non-penetrating receiving portion 6 has a thickness of a portion of the corrugated paper constituting the side plate 2 </ b> D in a step before joining the glue margin 2 </ b> F to the end of the side plate 2 </ b> D. It is realized by squashing in the direction.

  More specifically, as illustrated in FIG. 25, when the corrugated paper is configured in such a manner that corrugated paper 9 is connected to two liner papers 7 and 8, in the range of the receiving unit 6, Corrugated paper is crushed from the inside by a crushing jig (crushed roll, resin piece, cork piece, etc.), and as a result, the corrugated paper 9 is crushed from the inside to lose its thickness. A part of the back liner paper 8 is deformed so as to correspond to the reduced amount and approaches the front liner paper 7 side.

<3> As illustrated in FIG. 26, a perforated MC (perforated cut) from the back liner paper 8 side is put around the planned non-penetrating receiving portion 6, and the arrow B It is also possible to carry out stepping processing from the direction. In this case, since the receiving portion 6 formed in the concave shape by the crushing process is less likely to return to the original flat shape as compared with the form in which the perforation is not formed, the protrusions 5R and 5L are received. As a result, the protrusions 5 </ b> R and 5 </ b> L are easily held in a state of being locked in the receiving part 6. If the perforated MC is inserted so as to reach a part of the shin paper 9 beyond the back liner paper 8, it becomes more difficult to return to the original state.

<4> The protrusions 5R and 5L may be in a form that is maintained at the position of the receiving portion 6, and are not limited to a rectangle, but are not particularly limited in shape, such as a semicircular shape, an elliptical shape, and a triangular shape.

  The present invention includes a body portion including a plurality of side plates and a bottom flap extending from at least a lower end edge of each side plate, and the bottom flap is adjacent to an inner space of the body portion and an outer space. It is an invention that can be used as a technique for solving the problems conventionally found in a cardboard box having an outer flap.

2A Side plate 2B Side plate 2C Side plate 2D Side plate 3A Cover plate (inner flap)
3B Cover plate (external flap)
3C cover plate (inner flap)
3D cover plate (outside flap)
4A Bottom plate (inner flap)
4B Bottom plate (external flap)
4C Bottom plate (inner flap)
4D bottom plate (outside flap)
5L Protrusion 5R Protrusion 6 Receiving part 10 Cardboard box

Claims (5)

A body portion comprising a plurality of side plates; and a flap extending from a lower end edge and an upper end edge of each side plate, wherein the flap is adjacent to an inner space of the body portion and an outer space. A cardboard box having an outer flap,
A protrusion is provided on at least one side surface or end surface of the inner flap extended from the lower edge of the side plate and the upper flap of the side plate, and receives the protrusion. A cardboard box in which a receiving portion is provided on the side plate.   The cardboard box according to claim 1, wherein the receiving portion is constituted by a through hole.   The cardboard box according to claim 1, wherein the receiving portion is constituted by a recess facing the internal space.   The cardboard box according to any one of claims 1 to 3, wherein the protrusion is provided at a tip of a side surface of the flap.   A packaging container comprising the cardboard box according to any one of claims 1 to 4 and a resin bag-like content container stored in the cardboard box.

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