JPH11124126A - Folding packaging box and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a sufficient strength to a bottom of an assembled box and prevent a stored article from falling out of the bottom face by forming a crest-folding line on one side of each side flaps along a folding line on the bottom face and allowing each side flap to adhere to the adjacent side flap in an inverted state. SOLUTION: A fold-back wall 2 is provided via a valley-folding line 3, throughout the entire length of a side face 1 of a box having a hexagonal bottom face. A set of bottom flaps 21, 22 extends outside the fold-back wall 2 via crest-folding lines 17a, and two sets of side flaps 25, 26 and 35, 36 extend between the bottom flaps 21, 22 via crest-folding lines 17b, 17c, respectively. Each crest-folding line 19 is formed to each of the side flaps 26, 36 on one side along each of the folding lines on the bottom face, and their top ends 27, 37 of the side flaps 26, 36 are allowed to adhere to the adjacent side flaps 25, 35 in an inverted state, respectively. By this method, the underside of both sides of each of the bottom flaps 21, 22 is reinforced by the side flaps 25, 26, 35, 36 thereby enabling the bottom of the box to have a sufficient strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Technical field] The present invention relates to a method in which a pair of opposed bottom flaps extending outside a cylindrical side wall having both side edges adhered are adhered to each other at the center of one of the bottom flaps. The present invention relates to a foldable packaging box that can be folded and assembled using the provided valley fold line, and can be used not only for the box body but also for a box lid and a thick paper bag.

[0002]

2. Description of the Related Art A packaging box of this type is disclosed in Japanese Utility Model Publication No. 56-20332. In this known packaging box, the opposing bottom flap and the other bottom flap have their free ends bonded together, so that when the box is folded, the bottom flaps overlap inside the box. . When trying to open the box from the folded state and return to the used state, the valley fold line is provided at the center of the other flap, so it bends at this position and the tip side of the other flap is inverted, and at the same time, The bottom flap rises to form the bottom of the box. An overlap is provided between the side wall of the box and the bottom flap, and the inside of the side wall has a thickness, and both sides of the bottom flap are placed on the thickness of the overlap. However, since the side wall of the packaging box is formed of flexible paper, the form of the box is distorted when the package is stored or pressed by hand. Then, in a configuration in which both sides of the bottom flap are merely placed on the superposed piece, the side portions of the bottom flap are easily displaced from the superposed piece, and there is a problem that a gap is generated at the bottom of the box.

[0003]

The present invention relates to a pair of opposed bottom flaps extending outwardly of a cylindrical side wall having both side edges adhered to each other, and provided on one center line of the bottom flaps. It is an object of the present invention to provide a folding packaging box which can be folded and assembled using a valley folding line so that the bottom of the assembled box can have sufficient strength.

[0004]

Technical Means The first technical means for solving this technical problem relates to a folding packaging box. (A) The bottom shape of the box is hexagonal, and (B) the entire length is outside the side wall. (C) A set of bottom flaps and two side flaps are respectively extended between the bottom flaps through the mountain fold lines outside the folded wall. On the other hand, a mountain fold line is formed along the fold line on the bottom surface, and (e) it is adhered to an adjacent side flap in an inverted state. The second technical means relates to a method of manufacturing the folding packaging box. (F) The folded wall, in which the bottom flap and the side flap are extended through the mountain fold line, is formed with a valley fold line with the side wall. Bend to the side wall side using (g), glue the folded wall to the side wall,
(H) One end of two adjacent side flaps is inverted using a mountain fold line, and (iii) the side wall is formed using a valley fold line of the side wall formed between the two side flaps. Folding, and bonding the end portions of the bottom flap, the inverted end portion of the side flap and the other side flap, and the end of the side wall and the glue allowance.

Since the bottom of the box is hexagonal,
Using the folding line on the side wall and one diagonal line on the bottom surface, the bottom of the box is bent and folded. The bottom flap and the side flaps constituting the bottom surface of the box extend outside the folded wall provided through the valley fold line over the entire length outside the side wall. It will be formed on the double reinforced by the folded wall. The free ends of the bottom flap and the other bottom flap facing each other at the center across the diagonal are bonded to each other, so that when the box is folded, the bottom flaps overlap inside the box. When trying to open the box from the folded state and return to the use state, since the valley fold line is provided in the center of one flap, it is bent at this position, the tip side of the other flap is inverted, and at the same time the other flap is turned. The bottom flap will rise from the mountain fold line between the fold wall. The other flap, i.e., the flap whose tip end is not inverted, substantially conforms to the bottom surface shape of the box, and thus forms the inner bottom surface of the box when the box is opened and assembled. Note that the valley fold line and the mountain fold line used to explain the present invention are those in a development view before the flap is folded as viewed from the inside of the box, and the former is a solid line in the drawing, The latter is shown without a dotted line.

[0006] The valley fold line of the bottom flap whose tip is inverted to one of two side flaps located between these flaps, that is, one of the side flaps which are opposed on both sides of the bottom flap when the box is assembled. (A diagonal line when the box is opened) is folded in a mountain on the same line, and is glued to an adjacent side flap in an inverted state. Therefore, when the box is folded, the side flaps are folded along the mountain fold line independently of the bottom flaps and stored inside the box. In the use state of the box, the bottom flap is located inside the side flap and forms a bottom surface, so that the bottom surface itself is supported by the side flap. Therefore, in a state where the box is assembled, a bottom flap is formed on the lower portion of the double side wall so as to cover the entire bottom surface, and the bottom flaps are bonded to each other at both ends thereof. Since it is reinforced with side flaps, the bottom can have sufficient strength.

[0007]

As a result of providing the bottom of the assembled box with sufficient strength, there is an advantage that the articles stored in the packaging box are not restricted and the stored articles do not fall off the bottom. .

[0008]

FIG. 1 is an exploded view of a main part of a folding packaging box according to the present invention as viewed from the inside. In this embodiment, the bottom shape of the box is a regular hexagon. A folded wall 2 is provided at the lower end of the side wall 1 via a valley fold line 3 over the entire length. The bottom flaps 21 and 22 are located at positions facing each other when the glue allowance 16 is bonded to the other side edge of the side wall 1 to form a cylindrical side wall.
It extends through 7a. Similarly, bottom flap 2
Two side flaps 25, 26, 35 and 36 are located between the first and the second 22 and extend to the folded wall via the mountain fold lines 17b and 17c. In this box, the box can be folded by crushing one diagonal line as a center line from the assembled state. The side wall 1 is folded at the valley fold lines 14 and 15, and the starting point of the diagonal line on the bottom is this valley. It is at the intersection of the fold lines 14, 15 and the bottom. One side wall that is superimposed when folded is bent by the valley fold lines 12 and 13, but the other side wall is not provided with a fold line, so that the cross section of the box in the assembled state of the box has a trapezoidal long piece. Is deformed into an arc shape (see FIG. 2).

The steps for assembling this box are as follows. First, the folded wall is bent at the valley fold line 3 toward the side wall 1, and the side wall 1 and the folded wall 2 are bonded at an appropriate position. At this time, the bottom flaps 21 and 22 and the side flaps 25, 26, 35 and 36 are
Since it is bent to the side, it overlaps with the side wall 1. Next, the tip portions 27 and 37 of the side flaps 26 and 36 are inverted using the mountain fold line 19. In this state, the side wall 1 is bent at the valley fold line 14 to bond the front end portions of the bottom flaps 21 and 22 and the front end portion 27 of the side flap to the side flap 25, and use the valley fold line 15 to join the side wall 1 together. By folding and adhering the tip to the glue margin 16 and the tip 37 of the side flap to the side flap 35, the assembling and bonding process of the flap on the bottom surface of the box is completed.

In the assembled box, the valley fold lines 14 and 15 are pushed inward to approach each other, and the box is opened to try to be three-dimensional. The side flaps are at the tip 27, 3
7 and the adjacent side flaps 25 and 35 are bonded, the mountain fold line 19 is opened, and the side flaps shift to the bottom side. The bottom flaps 21 and 22 try to fall to opposite sides, but the center of the flap 22 is bent at the valley fold line 18 and the tip side is inverted to form the bottom surface of the box. Both sides of the bottom flaps 21 and 22 are adhered at the stage where the bottom surface of the box is formed.
6 above.

In the process of folding and three-dimensionalizing the box, the bottom flap and the side flap bend independently of each other, so that the bottom flap is positioned inside the side flap so as not to interfere with each other. Is desirable. Therefore, in the present embodiment, the position of the mountain fold line 17a of the bottom flap is changed to the side flap 25, 2
From the positions of the mountain fold lines 17b and 17c at 6, 35 and 36,
Each is shifted outward by the thickness of the material and the thickness of the applied adhesive. When the box is folded using the valley fold lines 14 and 15 with the side wall 1 wall and the turnback wall 2 being doubled, the side wall 1 is bent while the wall thickness is increased. Cracks are formed on the outside and the appearance deteriorates. Therefore, in this embodiment, the valley fold line 14 of the side wall 1
Cuts 4 and 5 are provided in the turnback wall 2 on the extension of the line 15, so that only the valley fold lines 14 and 15 are made single to prevent the occurrence of cracks (see claim 3). However, this cut is not always necessary depending on the type and thickness of the material formed by the box.

FIG. 2 shows a structure in which the bottom flap 21 can be reliably positioned against a repulsive force generated when the bottom flap 22 and the side wall 1 are bent. FIG. 3 shows that the engaging piece 31 is protruded, and when the bottom surface is formed, the engaging piece can face the slit 32 provided on the side wall along the mountain fold line 17a of the flap 22 ( See claim 2). In order to make the cross-sectional shape of the entire box hexagonal, the valley fold lines for the folded wall 2 and the valley fold lines 14 and 15 for the side wall 1 of the mountain fold are formed from both sides of the base end of the bottom flap 21. What is necessary is just to form in parallel, and what is necessary is just to eliminate the valley broken lines 12 and 13 in order to give roundness to the cross-sectional shape of a box. On the opening side of the box, a lid can be formed and covered with the same configuration, or a strap can be attached to the opening to be used as a carrying bag. The cross-sectional shape of the box is not limited to a regular hexagon. It is also possible to adopt a flattened shape according to the state of storage and use.

[Brief description of the drawings]

FIG. 1 is a development view of a main part of a box according to the present invention.

FIG. 2 is a bottom perspective view of the box according to the present invention.

FIG. 3 is an expanded view of a main part of a box in another embodiment.

[Explanation of symbols]

1 side wall, 2 folded wall, 4, 5 cut, 12-1
5 valley fold line of side wall, 17 fold line of flap and folded wall, 18 valley fold line of bottom flap, 19 ridge fold line of side flap, 21, 22 bottom flap, 25, 2
6, 35, 36 side flaps

Claims (4)

[Claims] 1. A valley fold line formed on one center line of the bottom flaps by bonding a pair of opposing bottom flaps extending outside a cylindrical side wall to which both side edges are bonded. In the folding packaging box which can be folded and assembled by utilizing the above, the bottom shape of the box is made hexagonal, and a folding wall is provided outside the side wall through a valley fold line over the entire length, and the outside of the folding wall is provided. A pair of bottom flaps and two side flaps were respectively extended between them through a mountain fold line, and a mountain fold line was formed on one of the side flaps along the bottom fold line, and this was inverted. Folding packaging box adhered to the side flap next to it. 2. A slit according to claim 1, wherein a locking piece protrudes from a tip of one of the bottom flaps, and a slit is provided on a side wall along a mountain fold line of the other bottom flap. The foldable packaging box as described. 3. The folding packaging box according to claim 1, wherein a cut is made in the folded wall between the two side flaps in parallel with a side edge of the side wall. 4. A valley fold line provided on a center line of one of the bottom flaps, wherein a pair of opposed bottom flaps extending outside the cylindrical side wall to which both side edges are bonded are bonded to each other. In the method of manufacturing a folding packaging box having a hexagonal bottom surface that allows for assembly and assembly, a folded wall having a bottom flap and a side flap extended through a mountain fold line is defined as a side wall. Using the valley fold line, it is bent to the side wall side and adhered to the side wall, and one end portion of two adjacent side flaps is inverted using the mountain fold line to be formed between the two side flaps. The folding wrapping box that bends the side wall using the valley fold line of the side wall to bond the tip portions of the bottom flap, the inverted tip portion of the side flap and the other side flap, and the end portion of the side wall and the glue allowance. Production method.