JP2019108163A - Packaging box - Google Patents

Abstract

To provide a packaging box capable of being maintained in a closed state without adhesive tape or staples in use.SOLUTION: The packaging box includes a square cylindrical body portion 3 formed of a first side plate 1 and a second side plate 2, and a first flap portion 7 and a second flap portion 8. Side edges of the first flap portion 7 and the second flap portion 8 adjacent to each other are connected to each other. The second flap portion 8 is provided with a pair of inclined fold lines e and an insertion piece 10 that can be released from the second flap portion 8 by a pair of cuts f. The second side plate 2 is provided with a locking hole 5 into which the insertion piece 10 is inserted for locking. An abutting portion 8a that abuts on an outside surface of the second side plate 2 is formed in a region between the insertion piece 10 of the second flap portion 8 and the inclined fold lines e.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging box.

  Generally, a packaging box formed of corrugated cardboard is closed with four flaps connected to the upper edge of the square cylindrical body via a fold line. And in this type of packaging box, an adhesive tape and a staple are used in order to maintain the closed state by a flap (for example, refer to patent documents 1).

  On the other hand, there is known a packaging box of a type that is closed with a part (central part) of a top surface open for fresh vegetables and fruits and vegetables (see, for example, Patent Document 2).

  In this case, it is difficult to maintain the closed state by using an adhesive tape or a staple because the flaps are not in contact with each other or are in slight contact with each other.

Unexamined-Japanese-Patent No. 2000-128147 (FIG. 9) Japanese Patent Application Publication No. 2002-166930

  In view of the above points, the present invention aims to provide a packaging box capable of maintaining a closed state without using an adhesive tape or a staple.

  In order to achieve such an object, the packaging box of the present invention has a rectangular cylindrical shape with a pair of first side plates facing each other and a pair of second side plates facing each other in the direction orthogonal to the opposing direction of both first side plates. A first flap portion connected to the upper edge of the first side plate via a first upper edge fold line, and a second upper edge fold line at the upper edge of the second side plate Adjacent side edges of the first flap portion and the second flap portion are connected to each other via a flap fold line, and the second flap portion is connected to the second side plate. And a pair of inclined fold lines extending in a direction intersecting with each other starting from the two corners of the lower edge along the boundary between the two, and extending downward from the upper edge of the second flap portion between the two inclined fold lines An insertion piece releasable from the second flap portion by a pair of cuts; And the end of the inclined fold line is located at the upper edge of the second flap portion excluding the insertion piece, and the second side plate is A locking hole through which the inserting piece can be inserted and locked in a state where it is superposed on the outer side surface of the second side plate, and between the inserting piece of the second flap portion and the inclined fold line A contact portion is formed in the region, the contact portion being in contact with the outer surface of the second side plate in a state where the insertion piece is inserted into the locking hole.

  The closure of the packaging box of the present invention having the above-described configuration is formed by bending the second flap at a right angle to the outside of the body along the second upper edge fold line, and at the same time, along the first upper edge fold line. The two first flaps are bent to cover the upper surface of the body. As a result, the inclined fold line of the second flap portion is bent, and the second flap portion is horizontally extended outward from the upper edge of the body portion. Then, the second flap portion is folded along the overlapping flap fold line and the second upper edge fold line so as to overlap the outer surface of the second side plate. Then, the insertion piece of the second flap portion is inserted into the locking hole of the second side plate. Thereby, the superposition | polymerization state of the 2nd flap part to a 2nd side plate is maintained, and the lid closing state by both 1st flap parts is maintained. At this time, the contact portion formed in the second flap portion abuts on both sides of the locking hole into which the plug-in piece is inserted, whereby the plug-in piece contacting the inner surface of the second side plate through the locking hole A state in which the insertion piece is held by the contact portion in contact with the outer surface of the second side plate is formed, and the state in which the insertion piece is inserted into the locking hole is strongly maintained.

  As a result, it is possible to provide a packaging box capable of maintaining the closed state without using an adhesive tape or staples.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the external appearance of the packaging box in embodiment of this invention. The expanded view of the packaging box of FIG. Explanatory drawing which shows the top open state of the packaging box of FIG. Explanatory drawing which shows a part of closing operation | work of the packaging box of FIG.

  Embodiments of the present invention will be described based on the drawings. As shown in FIG. 1, the packaging box of the present embodiment is formed in a square cylindrical shape with a pair of first side plates 1 facing each other in the front-rear direction and a pair of second side plates 2 facing each other in the left-right direction. The body 3 is provided. Although not illustrated in the inside of the trunk | drum 3, vegetables, fruit and vegetables, etc. are accommodated as to-be-packaged goods.

  The packaging box shown in FIG. 1 is assembled from a substantially rectangular corrugated cardboard which has been punched into a developed state as shown in FIG. As shown in FIG. 2, in the packaging box in the unfolded state, the first side plates 1 and the second side plates 2 are alternately provided continuously via the trunk fold line a. The first side plate 1 is formed in a rectangular shape longer in width than the second side plate 2.

  The first side plate 1 is formed with a plurality of vent holes 4 for maintaining the freshness of the package. Further, the second side plate 2 is formed with a handle hole 5 formed in a size such that a finger can be inserted for gripping. Although described in detail later, the handle hole 5 also has a function as a locking hole of the present invention.

  Furthermore, a body bonding piece 6 is connected to the side edge of one of the second side plates 2 (the second side plate 2 positioned at the right end in FIG. 2) via a body folding line a.

  A first top flap portion 7 (first flap portion) is connected to the upper edge of each first side plate 1 via a first upper edge fold line b. A second top flap 8 (second flap) is connected to the upper edge of each second side plate 2 via a second upper edge fold line c.

  The adjacent side edges of the first top flaps 7 and the second top flaps 8 alternately arranged are integrally connected via the flap fold lines d.

  A flap bonding piece 9 is connected to the side edge of one second top flap 8 (the second top flap 8 located at the right end in FIG. 2) via a flap fold line d.

  The second upper edge fold line c (second side plate 2) has a second upper edge fold line c (second side plate 2) with the two corner portions of the second upper edge fold line c (the lower edge along the boundary with the second side plate 2) as a starting point. A pair of inclined fold lines extending in a direction intersecting with each other at an angle of 45 ° (a difference of about ± 10% may occur due to a variation in thickness of corrugated cardboard or the like) with respect to the lower edge e is formed.

  A plug-in piece 10 is formed between the two inclined fold lines e of the second top flap portion 8. The insertion piece 10 is formed between a pair of cuts f formed in the second top flap portion 8 and is freely released from the second top flap portion 8. Moreover, the insertion piece 10 is bendable with respect to the 2nd top flap part 8 by the proximal fold line g formed along the base end part.

  The end of the inclined folding line e is located at the upper edge of the second top flap 8 excluding the insertion piece. As will be described later, the insertion piece 10 of the second top flap portion 8 can be inserted into the handle hole 5 of the second side plate 2, and when the insertion piece 10 is inserted into the handle hole 5, the second top flap portion 8 is A region between the inclined folding line e and the insertion piece 10 is an abutting portion 8 a that abuts on the outer surface of the second side plate 2.

  The first bottom flap portion 11 is connected to the lower edge of each first side plate 1 via a first lower edge fold line h. The second bottom flap 12 is connected to the lower edge of each second side plate 2 via a second lower edge fold line i.

  A pair of locking pieces 11 a is formed on both sides of the tip (lower end in the drawing) of the first bottom flap portion 11. The second bottom flap portion 12 is formed with a notch 12 a for locking the locking piece 11 a of the first bottom flap portion 11.

  A part of the assembling operation of the packaging box configured as described above will be described. Although not shown, the assembly of the body 3 in the state shown in FIG. 3 will be described with reference to FIG. 2. The first side plate 1 and the second side plate 2 may be formed into a square tube by bending along the body fold line a. The body portion 3 is formed by bonding and bonding the body portion adhesive piece 6 to the opposite first side plate 1. Further, at this time, the flap flaps 9 connect the second top flap 8 and the first top flap 7 positioned at both ends.

  Then, the second bottom flap portion 12 is bent along the second lower edge fold line i to the bottom surface side of the trunk portion 3 and the first bottom flap portion 11 is along the first lower edge fold line h and the bottom surface of the trunk portion 3 It is bent to the side and polymerized to the second bottom flap portion 12. Then, by fixing the locking piece 11 a of the first bottom flap portion 11 by inserting it into the notch 12 a of the second bottom flap portion 12, the bottom portion of the trunk portion 3 is closed. Thereby, as shown in FIG. 3, the packaging box is in the assembled state in which the upper part is opened.

  Next, the procedure for closing the packaging box will be described. From the state shown in FIG. 3, the second top flap 8 is bent along the second upper edge fold line c to the outside of the trunk 3 at a right angle to the second side plate 2. Thereby, as shown in FIG. 4, the flap fold line d in which the first top flap portion 7 falls along the first upper edge fold line b in a direction covering the upper surface of the trunk 3 and forms a corner portion is Flattening occurs, the inclined folding line e of the second top flap portion 8 is bent, and a part of the second top flap portion 8 is formed into a triangular shape and polymerized.

  Then, from the state shown in FIG. 4, the second top flap portion 8 is bent along the second upper edge fold line c (and the flap fold line d overlapping the second upper edge fold line c) to form the second side plate 2. Polymerize on the outer surface. Then, the insertion piece 10 is inserted into the handle hole 5 (locking hole) to be in a locked state. Thereby, a packaging box will be in the closing state shown in FIG.

  At this time, the contact portion 8a formed by the second top flap 8 abuts on the outer side surface of the second side plate 2 positioned on both sides of the handle hole 5 in a state in which the insertion piece 10 is inserted. As a result, the second top flap 8 is in a state in which the second side plate 2 is sandwiched between the insertion piece 10 and the contact portion 8a, and the closed lid state is strongly maintained.

  Also, when lifting up the packaging box in the closed state, a hand is inserted into the handle hole 5 and at the same time, the insertion piece 10 is folded back above the inner surface of the second side plate 2 through the base fold line g. By doing this, the insert piece 10 wraps the upper inner edge of the handle hole 5 and the handle hole 5 is reinforced, so that inadvertent breakage does not occur. Furthermore, the thickness of the upper inner edge of the handle hole 5 can be increased by folding back the insertion piece 10, and the burden on the operator's hand at the time of lifting can be reduced. Moreover, since the contact portion 8a of the second top flap portion 8 abuts on both sides of the handle hole 5 to prevent distortion of the second side plate 2 in the expansion direction or the recess direction, the packaging box at the time of lifting The deformation of the premise can be prevented, and damage to the package can also be prevented.

  DESCRIPTION OF SYMBOLS 1 ... 1st side plate, 2 ... 2nd side plate, 3 ... body part, 5 ... handle hole (locking hole), 7 ... 1st top flap part (1st flap part), 8 ... 2nd top flap part (2nd 2 flap part), 8a: contact part, 10: insertion piece, b: first upper edge fold line, c: second upper edge fold line, d: flap fold line, e: inclined fold line, f: cut .

Claims (1)

A pair of first side plates facing each other and a pair of second side plates facing each other in a direction orthogonal to the opposing direction of the first side plates form a square cylindrical trunk portion;
A first flap portion connected to the upper edge of the first side plate via a first upper edge fold line, and a second flap portion connected to the upper edge of the second side plate via a second upper edge fold line And the adjacent side edges of the first flap portion and the second flap portion are connected via the flap fold lines,
The second flap portion is located between a pair of inclined fold lines extending in a direction intersecting with each other with the lower corner portions at the lower edge along the boundary with the second side plate as a starting point, A pair of cuts extending downward from the upper edge of the second flap portion, and the insert piece releasable from the second flap portion is foldable to the outside of the body portion and can be polymerized on the outer surface of the second side plate Provided in
The end of the inclined fold line is located at the upper edge of the second flap portion excluding the insertion piece,
The second side plate is provided with a locking hole through which the insertion piece can be inserted and locked in a state where it is superposed on the outer side surface of the second side plate.
In a region between the insertion piece of the second flap portion and the inclined fold line, an abutment portion that abuts on the outer surface of the second side plate in a state where the insertion piece is inserted into the locking hole is A packaging box characterized in that it is formed.