JP2002019772A - Corrugated fiberboard box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent troubles of a caser due to a collision of internal flaps and external flaps. SOLUTION: The internal flaps 2 are connected to the upper edges of end walls 1, and the external flaps 4 are connected to the upper edges of side walls 3 respectively. Then, the internal flaps 2 and the external flaps 4 are bent inward in order to seal this corrugated fiberboard box. In such a corrugated fiberboard box, on the internal flaps 2, an angle folding line 5 and corner folding lines 6 are provided. In this case, the angle folding line 5 tilts inward from both side base ends to the distal ends. The corner folding lines 6 are arranged in parallel with the angle folding line 5 on the outsides of the angle folding line 5. At the time of sealing by the caser, even if the internal flaps 2 collide with the external flaps 4, the internal flaps 2 fall while bending in a manner to escape along the angle folding line 5 and the corner folding lines 6. Therefore, the caser is prevented from troubles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box suitable for sealing with a caser.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, an inner flap 2 is connected to an upper edge of an end wall 1 and an outer flap 4 is connected to an upper edge of a side wall 3, so that the inner flap 2 and the outer flap 4 are sequentially connected. A cardboard box that is folded inward and sealed is used.

When such a cardboard box is sealed with a caser, if the inner flap 2 collides with the outer flap 4, these flaps 2 and 4 are crushed, causing a trouble that the caser stops.

[0004]

In order to avoid the above-mentioned troubles, it is conceivable to bend the outer flap 4 outward and release it before sealing with the caser. The burden increases.

It is also conceivable to cut off both sides of the inner flap 2 obliquely. However, in a manufacturing process in which a corrugated cardboard sheet is punched and printed by a flexo die cutter on the same machine, paper chips and paper dust are removed. If scattered, printing defects are likely to occur.

Accordingly, an object of the present invention is to prevent a trouble of a caser due to a collision of an inner flap with an outer flap without impairing workability and print quality.

[0007]

According to the present invention, an inner flap is connected to an upper edge of an end wall, an outer flap is connected to an upper edge of a side wall, and the inner flap and the outer flap are sequentially connected. In a cardboard box that is folded inside and sealed, even when the inner flap collides with the outer flap during sealing with the caser, both sides of the inner flap bend along the score line, preventing the caser trouble due to the collision of the flap It was done.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The cardboard box shown in FIGS. 1 and 2 has a structure in which an inner flap 2 is connected to an upper edge of an end wall 1 and an outer flap 4 is connected to an upper edge of a side wall 3, as in the conventional case. The inner flap 2 is provided with, as fold lines for perforations, a square fold line 5 that is inclined inward from both base ends to the front end, and a plurality of corner fold lines 6 that are arranged parallel to the outside.

Here, the corner fold line 5 and the corner fold line 6 are approximately 30
The angle is inclined at an angle of 5 °, and the interval is 5 to 12 mm, preferably 7 to 8 mm.

When such a square fold line 5 and a corner fold line 6 are provided, even when the inner flap 2 collides with the outer flap 4 at the time of sealing with the caser, the inner flap 2 is kept along the square fold line 5 and the corner fold line 6. Since it falls down while being bent so as to escape, the trouble of the caser due to the collision of the flaps 2 and 4 is prevented.

Further, since the both sides of the inner flap 2 are not cut, the corners of the box are square without any adjustment at the time of sealing, so that the sealing is performed accurately and the protection against drop impact is enhanced. .

It is ideal that the corner fold lines 6 extend radially from both base ends of the flap 2 as in the case of the corner fold lines 5, but it is difficult to manufacture such a mold.

However, since the step runs vertically through the inner flap 2, even if the corner fold line 6 is provided in parallel with the corner fold line 5, a twist is generated on both sides of the inner flap 2 from the root. Thus, a sufficient effect can be obtained.

If the cardboard is relatively thin and flexible, the corner fold line 6 may be omitted.

[0016]

As described above, in the cardboard box according to the present invention, even when the inner flap collides with the outer flap during sealing with the caser, the inner flap folds down so as to escape along the score line. Therefore, without the habit folding work of collision avoidance and the cutting which has a bad influence on printing,
Caser trouble can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sealing process of a cardboard box according to the present invention.

FIG. 2 is an enlarged view of a main part of the cardboard box blank according to the first embodiment.

FIG. 3 is a perspective view showing a sealing process of a conventional cardboard box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 End wall 2 Inner flap 3 Side wall 4 Outer flap 5 Square fold line 6 Corner fold line

Claims (3)

[Claims] An inner flap is connected to an upper edge of an end wall, an outer flap is connected to an upper edge of a side wall, and the inner flap and the outer flap are sequentially bent inward to seal the cardboard box. A cardboard box characterized in that the part is bent along the score line. 2. A cardboard box according to claim 1, wherein said cut line is a bent line which is inclined inward from both base ends of the inner flap to the front end thereof. 3. The corrugated cardboard box according to claim 2, wherein a corner fold line arranged in parallel outside the corner fold line is provided as the score line.