JPH09323724A - Corrugated cardboard case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugated cardboard case which is excellent in the packing workability and easily unpacked and which is not easily broken. SOLUTION: A folding line a10 is provided near the end of the fixing support side of the flap 2 of a corrugated cardboard case 1 and the first notches 4 are formed at both sides of the folding part 10. The first folded parts 7 which are parallel to the bottom face of the case and bent inward at right angles, are bent from the upper ends of both sides of the case 1 to form flat places 6 with about 10-30mm width. And further, the ends of the flat places 6 are bent dowm to the bottom face side at right angles to form the second folded parts 8. Moreover, these are bent at right angles at the bottom face to form the third folded parts 9. The second notches 5 are formed at the fixed support side of the second folded parts 8 and the third notches 11 are provided at the front end side of the second folded parts 8 to make the side face of the second notches 5 side narrower than the width of the flat places 6. In this way, packing and unpacking works are facilitated and the corrugated cardboard cases are not easily broken.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cardboard box for packaging.

[0002]

2. Description of the Related Art In many cases, packing boxes used for packing small and medium-sized products are constructed so that an outer flap (upper lid) and an inner flap (inner lid) are overlapped with each other at an opening on the upper surface. .

FIG. 3 is a perspective view of an embodiment of a cardboard box used for packing these products. This cardboard box 1
In b, the box portion and the outer flap 15 are integrated with each other, a protruding portion 17 is formed at the tip of the outer flap 15, and a substantially rectangular long hole a21 is provided at the bent portion of the protruding portion. . In addition, the opening / closing fulcrum portion 18 of the inner flap 16 is provided with a long hole b20, and the lock portion 19 is provided on the side surface of the box.

In such a structure, at the time of packing, the projecting portion 17 provided at the tip of the outer flap 15 is inserted into the long hole b20 provided in the opening / closing fulcrum portion 18 of the inner flap 16, and then the lock portion 19 is provided. Can be packaged by fitting into the long hole a21.

As a conventional cardboard box, a box having such a structure is often used, and recently, a cardboard box as shown in FIG. 4 can be seen. This cardboard box 1c is similar to the cardboard box 1b in FIG. 3 in that the box and the outer flap 15 are integrated, and a protrusion 17 is formed at the tip of the outer flap 15. The opening / closing fulcrum portion 18 of the inner flap 16 is provided with a long hole b20, and a first cut-and-raised portion 21 whose fulcrum is located below the middle of the long hole b20 in the longitudinal direction. A second cut-and-raised piece 22 having an upper side as a fulcrum is provided inside the first cut-and-raised piece 21. In addition, a fitting hole 23 is provided in the tip projection 17 of the outer flap 15.

In such a structure, at the time of packing, the projecting portion 17 at the tip of the outer flap 15 is a long hole b20 provided in the opening / closing fulcrum portion 18 of the inner flap 16.
Is inserted into. Next, by pushing the tip of the second cut-and-raised part 22 toward the inside of the box, the second cut-and-raised part 22 is pushed.
The leading end of the outer flap 15 is fitted into the fitting hole 23 of the outer flap 15, and the outer flap 15 is not opened and is packaged.
When the outer flap 15 of the cardboard box 1c is opened, the upper end of the first cut-and-raised part 21 is pulled forward by a finger so that the second cut-and-raised part 22 is located outside the fitting hole 23 provided in the outer flap 15. Can be moved and unlocked to unpack.

[0007]

In the corrugated board of the method shown in FIG. 3, there is a case where the lock portion is difficult to enter into the long hole provided in the outer flap due to variations in cutting and bending when the box is made. Workability is poor. The cardboard box with such a structure has a drawback that the lock part is difficult to fit and is inconvenient when the packing work is performed on the assembly line in a short time, and the lock part is hard to remove even when unpacking. . Further, although the cardboard box configured as shown in FIG. 4 is easy to pack, there is a problem in that if the second cut-and-raised portion is pushed hard, the cut-and-raised portion is easily broken.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a corrugated cardboard box which has good packing workability, is easy to unpack, and is hard to break.

[0009]

[Means for Solving the Problems] A bent portion a is formed in the vicinity of an end portion on the side opposite to the opening / closing fulcrum of a flap of a cardboard box and in parallel with the opening / closing fulcrum portion.
And a first cutout is formed on both sides of this bent portion. Then, from the upper ends of both sides of the cardboard box, a first bent portion is formed at a right angle inward in parallel with the bottom surface of the box, and a flat portion having a width of about 10 to 30 mm is provided. Further, it is bent at a right angle in the direction of the bottom surface of this box to form a second bent portion, and at the bottom surface is bent at a right angle to form a third bent portion. Further, a second notch is provided on the side opposite to the opening / closing fulcrum of the second bent portion, and a side surface on the second notch side closer to the tip end side than the second bent portion is narrower than the width of the flat portion. By providing the third cutout portion, packaging and unpacking can be easily performed, and the box is less likely to be broken, which solves the problem.

[0010]

By inserting the end of the flap into the box, the tip of the flap is fitted into the gap between the inside of the side surface of the box and the flat portion formed inside the box, and is formed on both sides of the flap. The cutout portion and the side surface of the flat portion are fitted to each other so that the flap cannot be opened. When opening this enclosed flap, apply a force upward with a finger on the flap of the substantially semicircular cutout formed on the upper end of the box side plate, and lift it up, near the corner of the flat part, The engagement between the flat surface portion and the cutout portion formed in the flap is released, and the cardboard box is unpacked.

As described above, the corrugated cardboard is engaged by simply inserting the flap end into the box, and can be packed easily and reliably, and can be unpacked easily.

[0012]

1 is a perspective view of a corrugated board box according to an embodiment of the present invention, and FIG. 2 is a development view of the corrugated board box of FIG. Is.

In FIGS. 1 and 2, the cardboard box is composed of a box portion and a flap portion, and the box and the flap are integrated at an opening / closing fulcrum portion. A bent portion a10 is provided in the vicinity of the end portion of the flap 2 on the side opposite to the opening / closing fulcrum, in parallel with the opening / closing fulcrum.
First cutouts 4 are formed on both sides of 0. Next, as the configuration of the box portion, the first bent portion 7 is formed by being bent from the upper ends of both sides of the box portion in parallel to the bottom surface of the box and at a right angle inward. And about 10
The flat portion 6 having a width of 30 mm is provided, and the second bent portion 8 is bent at a right angle from the end of the flat portion 6 toward the bottom surface of the box.
Are formed. Further, the bottom surface is bent at a right angle to form a third bent portion 9 and is in contact with the bottom surface. Also, the second
A second notch 5 is formed on the side opposite to the opening / closing fulcrum of the bent portion 8,
Further, the third notch 11 is provided so that the side surface on the notch 5 side is narrower than the width of the flat surface portion 6.

In such a structure, by inserting the end portion of the flap 2 into the box, the tip of the bent portion a10 is fitted into the gap between the flat surface portion 6 and the inner side surface of the box side plate, and both sides of the flap 2 are inserted. The first cutout portion 4 formed in the above and the side surface of the flat surface portion 6 are hooked and engaged with each other, and the flap 2 cannot be opened.
When opening the closed flap 2, the substantially semicircular notch formed in the upper end of the box side plate is lifted by applying force upward with fingers to close the corner of the flat surface portion 6. Lifted, the flat portion 6 and the first cutout portion formed in the flap 2 are disengaged, and the corrugated cardboard box 1 is opened.

With such a structure, the packing work is completed by only one work of inserting the tip of the flap 2 into the box 11. Moreover, it is opened by simply pushing the end of the flap 2 and lifting it up. In this way, the packing and unpacking operations can be done easily.

In comparison with this, in the case of packing in the conventional example,
The packing operation is completed only after two steps of fitting the protruding portion 17 and the lock portion 19 or fitting the second cut-and-raised portion 22 are performed. Further, the unpacking work takes two steps like the packing work, and each work takes time.

[0017]

As described above, the corrugated cardboard box of the present invention can be easily and surely packed, and can be easily unpacked. Further, the cardboard box is not easily broken during packing and unpacking work.

[0018]

[Brief description of drawings]

FIG. 1 is a perspective view of a cardboard box according to an embodiment of the present invention.

FIG. 2 is a development view of the cardboard box shown in FIG.

FIG. 3 is a perspective view of a cardboard box according to a conventional example.

FIG. 4 is a perspective view of a cardboard box according to another conventional example.

[Explanation of symbols]

 1, 1b, 1c ... Corrugated cardboard box 2 ... Flap (lid) 3 ... Opening / closing fulcrum part 4 ... First cutout part 5 ... Second cutout part 6・ ・ ・ ・ ・ Flat part 7 ・ ・ ・ ・ ・ First bent part 8 ・ ・ ・ ・ ・ Second bent part 9 ・ ・ ・ Third bent part 10 ・ ・ ・ ・ ・ Folded part a 11-third notch

Claims (1)

[Claims] 1. In a cardboard box 1 having a flap 2 on its upper surface, a bending portion a10 is provided in the vicinity of an end portion of the flap 2 on the side opposite to the opening / closing fulcrum, and a folding portion a10 is provided on both sides of the folding portion a10. A first cutout 4 is formed on the upper surface of the corrugated cardboard box 1, and a first bent portion 7 is formed parallel to the bottom surface of the box 1 at a right angle to the inside of the box 1 from the upper ends of both sides of the cardboard box 1. A portion 6 is provided, the second bent portion 8 is bent at a right angle from the end of the flat portion 6 to the bottom surface direction of the box 1, and further, a second bent portion 8 is bent at the bottom surface to form a third bent portion 9. A second cutout portion 5 is provided on the side opposite to the opening / closing fulcrum of the second bent portion 8, and a side surface on the second cutout portion 5 side closer to the tip side than the second bent portion 8 is wider than the width of the flat surface portion 6. The flap 2 can be easily opened and closed by forming the third notch 11 so as to be narrow. A cardboard box to be.