JP2002029532A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively reinforce portions of creases of a packaging box, facilitate assembly and folding of the box and prevent a reinforcing member from dropping to be lost. SOLUTION: The packaging box comprises side panels 1 and 1 forming a pair of opposite side faces of a box body and end panels 2 and 2 forming a pair of opposite end surfaces of the box body, wherein the panels are alternately connected via creases and the side panel 1 and the end panel 2 at the farthest ends are joined with each other via a joining flap 3 which is connected with either of them via a crease. An elongated reinforcing plate 8 having parallel creases 9 at a center part is prepared, the reinforcing plate 8 is folded at the creases 9 and overlaid over both side panels 1 and 1 and end panels 2 and 2 while the side panels 1 and 1 and the end panels 2 and 2 which are connected via the creases are folded back at the creases. In addition, only parts at both sides outside the creases 9 of the plate 8 are stuck to the side panels 1 and 1 and the end panels 2 and 2, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a side panel forming a pair of opposing side surfaces of a box, and an end panel forming a pair of opposing end surfaces of the box. The present invention relates to a packaging box formed by joining an end panel with a joining flap to form a quadrangular tubular body.

[0002]

2. Description of the Related Art Conventionally, a blank of such a packaging box is formed by punching a corrugated cardboard plate and making a broken line. In this blank, a pair of side panels and end panels are alternately connected via broken lines. The upper and lower sides of the side panel and the end panel are broken lines, and upper and lower flaps for closing the upper and lower surfaces of the box are extended from the broken lines.

[0003] A bent line between the side panel and the end panel of the blank is bent in the same direction, and both side edges of the side panel and the end panel are joined to each other to form a square tubular body. After that, the lower panel extending from the side panel and the end panel via the folding line is bent inwardly forward and backward, and they are fixed to each other, and the bottom surface of the box is closed. Furthermore, after storing the stored items from the upper surface of the box body, the upper flap extended from the side panel and the end panel via the folding line is bent inward,
Close the top of the box.

In such a packaging box, both ends of the end panel and the end panel are joined to each other, every other fold line is straightened, and every other fold line therebetween is folded at an angle of about 0 °. As a result, two blanks are stacked and shipped. When used, the folding line between the side panel and the end panel is bent at an angle of 90 °, and in this state, the bottom flap is first bent inward to close the bottom surface of the box. Then, after storing things in a box, the upper flap is bent inward and the upper surface of the box is closed.

[0005] In such a type of packaging box, there is a so-called returnable box which is repeatedly used as a mode of use. In this method, after shipping goods from a certain point to another point, the box is returned to the original point, or the box is transported to another necessary point and used repeatedly. In such a returnable box, assembling of the box for shipping the stored items and folding of the box itself for transportation are repeatedly performed. When the box is folded, the fold line is either straight or folded at an angle of approximately 0 °. On the other hand, when the box is assembled to store the storage items, the folding line is bent at an angle of 90 °.

[0006]

When the packaging box as described above is used repeatedly, the assembling and folding of the box are repeated, so that the folding line of the box is repeatedly bent and stretched many times. For this reason, the box is easily broken at the broken line portion. Therefore, it may be necessary to reinforce this broken line portion of the box.

As described above, the folding line of the box is in a state of being straightened at an angle of 180 °, a state of being bent at an angle of 90 °, or a state of being folded at an angle of almost 0 °. . Therefore, when any reinforcing member is fixed to the fold line portion to reinforce it, an arbitrary bending angle at the fold line cannot be obtained, and it is impossible to repeat the assembling and folding of the box. On the other hand, if the reinforcing member is provided separately from the box blank in order to arbitrarily assemble and fold, the reinforcing member is likely to fall off the blank, making it difficult to use as a returnable box.

In view of the above-mentioned problems of the conventional packaging box, the present invention can effectively reinforce the folded line portion of the packaging box, and can easily assemble and fold the box. It is an object of the present invention to provide a packaging box in which members do not fall off the packaging box and are lost.

[0009]

According to the present invention, in order to achieve the above object, a long reinforcing plate 8 having a vertical folding line 9 in the center is prepared. The center is aligned with the fold line between the side panel 1 and the end panel 2, and only the two side portions outside the fold line 9 are bonded to the portions near the fold line between the side panel 1 and the end panel 2, respectively. When attaching both sides of the reinforcing plate 8 to the side panel 1 and the end panel 2, the side panel 1 and the end panel 2 are attached to both sides of the reinforcing plate 8 in a state where the side panel 1 and the end panel 2 are folded at an angle of substantially 0 °.

In the packaging box according to the present invention, the side panels 1 and 1 forming a pair of opposed side surfaces of the box body and the end panels 2 and 2 forming a pair of opposed end surfaces of the box body are interposed along a folding line. The end panels 1 and 2 are joined to each other by a joining flap 3 connected to any of them via a fold line. In such packaging boxes,
A long reinforcing plate 8 having a fold line 9 parallel to the central portion is prepared, and the side panels 1, 1 and the end panel 2, which are connected via the fold line,
2 is folded back at the fold line, and the reinforcing plate 8 is folded at the fold line 9 so that both the side panels 1 and 1 and the end panels 2 and 2 are overlapped, and the reinforcing plate 8 is outside the fold line 9 of the reinforcing plate 8. Are attached to the side panels 1 and 1 and the end panels 2 and 2 respectively.

In the packaging box according to the present invention, two fold lines 9 of the reinforcing plate 8 are provided in parallel on both sides from the center of the folded side panels 1, 1 and the end panels 2, 2 in contact with the fold lines. ing. Alternatively, a single fold line 9 may be provided in parallel with each of the centers of the reinforcing side plates 8 and the end panels 2 and 2 which are in contact with the fold lines of the reinforcing plate 8 and the both sides thereof. The bending line 9 of the reinforcing plate 8 is reversed in the bending direction on the center side of the reinforcing plate 8 and on both sides thereof.

In such a packaging box, the side panel 1 and the end panel 2 which are adjacent to each other via the fold line are connected to each other by the reinforcing plate 8, so that the fold line portion between the side panel 1 and the end panel 2 is formed. Is reinforced and can withstand repeated bending. The reinforcing plate 8 is not attached to the side panel 1 and the end panel 2 at the intermediate portion having the folding line 9, but only to both side portions thereof. The panel 2 is attached to the side panel 1 and the end panel 2 in a state of being folded at the folding lines 9. For this reason, when the side panel 1 and the end panel 2 are bent at an angle of 90 ° or extended at an angle of 180 °, the intermediate portion of the reinforcing plate 8 is bent at the fold line 9 and It rises from the fold line with the panel 2 and allows its bending or elongation. For this reason, the reinforcing plate 8 holds the side panel 1 and the end panel 2 regardless of whether the packaging box is assembled or folded.
It is possible to arbitrarily set the state thereof by allowing bending or elongation with the above.

[0013]

Embodiments of the present invention will now be described specifically and in detail with reference to the drawings.
FIG. 1 is an exploded view of a blank of a main body of a general packaging box according to an embodiment of the present invention. As the blank of the packaging box, a corrugated board in which a core made of a corrugated sheet made of paper is laminated with a liner is used. A blank before assembly is completed by punching out a corrugated board as shown by a solid line in FIG. 1 and making a broken line as shown by a broken line. All broken lines shown by broken lines are bent in the same direction with respect to the paper surface of FIG.

In the blank of the packaging box shown in FIG. 1, rectangular side panels 1, 1 and end panels 2, 2 are alternately connected to each other through broken lines. The heights of the side panels 1, 1 and the end panels 2, 2 are the same, and the two side panels 1,
1 and the end panels 2 and 2 have the same width, and the side panels 1 and 1 and the end panels 2 and 2 have different widths. It goes without saying that the heights and widths of the side panels 1 and 1 and the end panels 2 and 2 are different depending on the use thereof, the size of the storage items, and the like.

A joining flap 3 extends from a side of the side panel 1 at the end via a broken line, and such a joining flap does not extend to the end panel 2 at the end. Outer flaps 4, 4 extend from the fold lines on the lower sides of the side panels 1, 1. The length (the left and right dimensions in FIG. 1) of the outer bottom flaps 4 and 4 is slightly smaller than the width of the side panels 1 and 1, and the height (the upper and lower dimensions in FIG. 1) is the width of the end panel 2. About 1/2 of

The bottom inner flaps 5, 5 extend from the broken lines on the lower sides of the end panels 2, 2. The length (the left and right dimensions in FIG. 1) of the bottom inner flaps 5 and 5 is slightly smaller than the width of the end panels 2 and 2 and the height (the upper and lower dimensions in FIG. 1) is Same as 4.

Upper and outer flaps 6, 6 extend from the folding line on the upper side of the side panels 1, 1. The length (the left and right dimensions in FIG. 1) of the upper and outer flaps 6, 6 is slightly smaller than the width of the side panels 1, 1. The height of the upper and outer flaps 6 (up and down dimensions in FIG. 1) is about の of the width of the end flap 2.

Upper inner flaps 7, 7 extend from fold lines on the upper sides of the end panels 2, 2. The length (the left and right dimensions in FIG. 1) of the upper inner flaps 7 is slightly smaller than the width of the end panels 2 and 2 and the height (the upper and lower dimensions in FIG. 1) is , 6.

A packaging box is assembled from such blanks as follows. First, the fold lines between the side panels 1, 1, the end panels 2, 2 and the joining flap 3 are all bent in the same direction at an angle of 90 °. Further, glue is applied to the outer surface of the joining flap 3, and the outer surface of the joining flap 3 is attached to the inner surface of the edge of the end panel 2. Thereby, a square tubular body is formed by the side panels 1 and 1 and the end panels 2 and 2.

A reinforcing plate 8 as shown in FIGS. 2 and 3 is prepared separately from the box body blank. This reinforcing plate 8
Is made of a vertically elongated corrugated cardboard, and its length is slightly shorter than the height of the side panel 1 or the end panel 2. As shown in the enlarged view of FIG. 2, the direction of the corrugated center of the reinforcing plate 8, that is, the direction of the wave is the width direction, and the peaks and valleys are along the longitudinal direction.

At the center of the reinforcing plate 8, two parallel folding lines 9 are provided on both sides symmetrically with respect to the center line in the width direction. The interval between the two inner folding lines is a width slightly more than about two corrugated boards of the box body. The two folding lines 9 on both sides and the two inside folding lines 9 have different folding directions from each other. For example, in FIG. 2, the two folding lines 9 on both sides are valley-folding, and the two inside folding lines 9 are shown. Is a mountain fold.

The reinforcing plate 9 is coated with glue on the back side in FIG. 2 on both sides outside the hatched fold line 9 in FIG. 1, and the reinforcing plate 9 is attached to the side panel 1 and the end panel 2 by this glue. It is pasted along the fold line. At the time of this attachment, the center line of the reinforcing plate 9 is folded along the side panel 1 and the end panel 2 at an angle of substantially 0 °, as shown by the folded lines on both sides in the folded state as shown in FIG. As shown in FIG. 5 (B), the sheet is attached such that the inside bent by two fold lines 9 inside the reinforcing plate 8 overlaps the surface of the side panel 1 to the surface of the end panel 2. At this time, since the central portion of the reinforcing plate 8 having the folding line 9 has no glue, it is only in contact with the vicinity of the folding line between the side panel 1 and the end panel 2 and is not bonded. Regarding the other two fold lines, the reinforcing plate 8 is similarly adhered in a state where the side panel 1 and the end panel 2 are completely folded.

FIG. 4 shows a state in which the reinforcing plate 8 is attached in this manner. In FIG. 4, the central fold line is extended by 180 °. In this state, as shown in FIG. 5 (A), the reinforcing plate 18 attached to the fold line between the side panel 1 and the end panel 2 is broken at the fold line 9 and rises from the fold line between the side panel 1 and the end panel 2, The side panel 1 and the end panel 2 are 18
Allow 0 ° extension.

On the other hand, the folding lines on both sides in FIG. 4 are in a state of being folded at almost 0 °. In this state, FIG.
As shown in the figure, the reinforcing plate 18 attached to the fold line portion between the side panel 1 and the end panel 2 is folded at the inner fold line 9 to be in contact with the fold line between the side panel 1 and the end panel 2, and The state where the end panel 2 and the end panel 2 are folded back at 0 ° is allowed. Therefore, as shown in FIG. 4, the form of the blank of the packaging box can be folded.

Next, in order to assemble the thus folded blank as a box, first, the bottom flaps 5, 5 are bent inward at an angle of about 90 ° with the bottom of the box facing upward. In addition, the outer bottom flaps 4, 4
At the angle of ゜, the bottom of the box is closed, and the outer flaps 4, 4 are bonded to the inner flaps 5, 5, or the outer flaps 4, 4 are connected to each other by staples or the like.

Next, the box is turned upside down so that the upper surface side faces upward. From this state, the upper inner flaps 7, 7 are bent inward at an angle of about 90 °. Further, the upper and outer flaps 6, 6 are bent inward at an angle of about 90 ° to close the upper surface of the box, and the upper and outer flaps 5, 5 are bonded to the upper and inner flaps 7, 7, or , 6 are connected to each other by staples or the like.

FIG. 6 shows this state. In this state, as shown in FIG. 7, the reinforcing plate 8 connects the adjacent side panel 1 and end panel 2 to each other via a folding line to reinforce. Also, the central part of the reinforcing plate 8 having the fold line is broken at the fold line 9,
Slightly away from the vicinity of the fold line between the side panel 1 and the end panel 2.
This allows the side panel 1 and the end panel 2 to be bent at an angle of 90 °.

FIG. 8 is a sectional view of a folding line portion between a side panel 1 and an end panel 2 of a packaging box according to another embodiment of the present invention. In these, three fold lines 9 of the reinforcing plate 8 are parallel to the center of the reinforcing plate 8 and both sides thereof. FIG.
8A shows a state where the side panel 1 and the end panel 2 are extended at an angle of 180 °, and FIG. 8B shows a state where the side panel 1 and the end panel 2 are folded at an angle of 0 °. Yes, Figure 8
(C) is a state where the side panel 1 and the end panel 2 are bent at an angle of 90 °. As shown in FIG. 8 (B), in the state where the side panel 1 and the end panel 2 are folded at an angle of 0 °, there is only one central mountain-shaped fold line 9, so that some difficulty is caused. The fold line between the side panel 1 and the end panel 2 can be reinforced in substantially the same manner as in the embodiment.

[0029]

As described above, in the packaging box according to the present invention, the reinforcing plate 8 can effectively reinforce the folded line portion between the side panel 1 and the end panel 2 of the packaging box.
Since the side panel 1 and the end panel 2 can be set to any of a state of being extended at an angle of 180 °, a state of being folded at an angle of 0 °, and a state of being folded at an angle of 90 °,
The box can be easily assembled and folded. Moreover, since both sides of the reinforcing plate 8 are adhered to the side panel 1 and the end panel 2, there is no possibility that the reinforcing plate 8 falls out of the packaging box and is lost.

[Brief description of the drawings]

FIG. 1 is a plan view of a blank showing an example of a box body used for a packaging box according to an embodiment of the present invention.

FIG. 2 is a plan view of a blank showing an example of a reinforcing plate used in the packaging box according to the embodiment, and a partial plan view with a part thereof cut away.

FIG. 3 is an enlarged longitudinal sectional view taken along the line AA in FIG. 2;

FIG. 4 is a perspective view showing a state where the side panel and the end panel of the packaging box according to the embodiment are joined and folded.

FIG. 5 is an enlarged sectional view of a main part showing a state where the side panel and the end panel of the packaging box according to the embodiment are extended at an angle of 180 ° and a state where the side panel and the end panel are folded back at a substantially 0 ° state.

FIG. 6 is a perspective view showing a state where the packaging box according to the embodiment is assembled.

FIG. 7 is an enlarged sectional view of a main part showing a state where the side panel and the end panel of the packaging box according to the embodiment are bent at an angle of 90 °.

FIG. 8 shows a state in which the side panel and the end panel of the packaging box according to another embodiment of the present invention are extended at an angle of 180 °, folded at almost 0 °, and folded at 90 °. It is a principal part expanded sectional view shown.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side panel 2 End panel 3 Joining flap 8 Reinforcement plate 9 Reinforcement line of reinforcement plate

Claims (4)

[Claims] 1. A folding line is formed between side panels (1) and (1) forming a pair of opposed side surfaces of a box and end panels (2) and (2) forming a pair of opposed end surfaces of the box. In a packaging box in which the endmost side panel (1) and the end panel (2) are joined to each other by a joining flap (3) connected to any one of them via a fold line, A long reinforcing plate (8) having a fold line (9) parallel to the portion is prepared, and the side panels (1), (1) and the end panels (2), (2) connected via the fold line are fold lines. In the folded state,
Side panels (1), (1) and end panels (2), (2) obtained by bending the reinforcing plate (8) along the fold line (9).
And the reinforcing plate (8)
Side panel (1) only on both sides outside the fold line (9),
A packaging box, which is attached to (1) and end panels (2) and (2), respectively. 2. The folding line (9) of the reinforcing plate (8) is parallel to both sides from the center of the folded side panels (1), (1) and the end panels (2), (2), which are in contact with the folding lines. The packaging box according to claim 1, wherein the packaging box is provided for each book. 3. The fold line (9) of the reinforcing plate (8) is parallel to the center of the folded side panels (1), (1) and the end panels (2), (2), which are in contact with the fold line, and to both sides thereof. The packaging box according to claim 1, wherein the packaging box is provided one by one. 4. The packaging box according to claim 1, wherein the folding line (9) of the reinforcing plate (8) has opposite bending directions on the center side and on both sides thereof.