JP2003285826A - Packaging box made of corrugated board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly and continuously cut a packaging box without reducing the strength of the packaging box. <P>SOLUTION: According to the corrugated board packaging box, pairs of cut lines are formed in position in the vertical direction on pairs of counter side faces 1, 1 and 2, 2, which forms the outer periphery of the box, to cover the whole periphery of the box. Each pair of cut lines have dog-legged parts 14a slantly dog-legged inward at a cut starting end, linear parts 14b extending from the dog-legged parts 14a and parallel to each other, and dog-legged parts 14c slantly dog-legged outward at a cut rear end. Such a pair of cut lines are formed at every identical interval across respective dividing part 14d to form a zipper-like cut line 13. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a corrugated board packaging box.

[0002]

2. Description of the Related Art Conventionally, in order to display a product (hereinafter referred to as an item to be stored) that is sold at a store or the like in a cardboard box, the upper half of the box is cut off. In order to do so, a zipper-shaped cut line is formed on two sets of opposing side plates that form the outer circumference of a packaging box.

13 to 16 show an example of a conventional corrugated board packaging box of this kind, which will be described below with reference to the drawings.
The corrugated board packaging box has two sets of opposite side plates 1, 1, 2, 2
And the bottom plate forming flaps 3, 3, 4, 4 which are continuously provided at the lower ends of the two pairs of the opposite side plates 1, 1, 2, 2 and the two pairs of the opposite side plates 1, 1, 2, 2. It is composed of upper lid forming flaps 5, 5, 6, 6 which are continuously provided on the upper end, and a zipper is formed at an approximately middle portion in the vertical direction of two sets of opposite side plates 1, 1, 2, 2 forming the outer periphery of the packaging box. Cut lines 7 are formed at regular intervals. More specifically, the zipper-shaped cut lines 7 are a set of two and are formed such that the cut start ends are bent obliquely inward, and the straight line portions 8b extending from the bent portions 8a are parallel to each other. Denoted at 8c are dividing portions formed at equal intervals in the length direction of the cut line 7. That is, such a cut line 7 is divided into
By providing c, it is possible to maintain strength in the packaging box, and by providing a bent portion 8a at the cut start end portion, in the dividing portion 8c, two linear portions 8b are provided.
A break portion from the rear end portion toward the next bent portion 8a is easily connected to the bent portion 8a. A cut line 19a connected to the cut line 7 is also formed on the stop margin portion 19.

When the upper half of the packaging box is cut off by cutting the zipper-shaped cut line 7 of the packaging box in the storage state of the objects to be stored, one set on the short side forming the left and right side surfaces of the packaging box. Of the opposing side plates 1 and 1, one side plate 1 is cut by pulling it along the cut line 7 by hooking it with a finger from an I-shaped cut portion 9 inserted in the middle of the cut line 7 in the front-rear direction central portion. The plate portion 10 between the lines 7 is cut out in a strip shape. As a result, almost the upper half of the packaging box is cut off, and the stored object 11 can be displayed in a state of being stored in the approximately lower half of the packaging box.

However, although such a zipper-shaped cut line 7 is adapted to be continuously cut from the bent portion 8a at the cut start end, two straight line portions 8 are formed.
A dividing portion 8c between the rear end portion of b and the next bent portion 8a
In the above, in the broken portion 12 extending from the rear end portion of the two straight portions 8b to the next bent portion 8a, the two bent portions 8a
Since the broken portion 12 is not connected to the bent portion 8a (see FIG. 11) and the cut is interrupted in the middle of the packaging box, the two straight portions 8b and the rear end portion are Since it is necessary to shorten the interval of the dividing portion 8c between the bent portion 8a and the bending portion 8a, there is a problem that the strength of the packaging box is reduced accordingly.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and an object thereof is to make it possible to cut smoothly without interruption without lowering the strength of the packaging box. is there.

[0007]

In order to solve this problem, the present invention is made of corrugated cardboard in which cut lines are formed at appropriate positions in the vertical direction of two sets of opposite side plates forming the outer circumference. In the packaging box, some or all of the cut lines are formed in pairs so that each cut start end has a bent portion that bends inward at an angle, and straight portions extending from the bent portions are parallel to each other. The gist of the present invention is that the rear end of the straight portion is a zipper-shaped cut line in which portions having outwardly-bently bent portions are formed with the dividing portions sandwiched at equal intervals. Further, the present invention provides a corrugated board packaging box in which cut lines are formed at appropriate positions in the vertical direction of two sets of opposing side plates forming an outer circumference over the entire circumference, and some or all of the cut lines are 2 or more. In this set, each cut start end faces in the vertical direction, and of the two start ends facing in the vertical direction, linear portions extending from the lower end of the upper start end and the upper end of the lower start end are gradually spaced. The gist of the invention is that the widened portions are zipper-shaped cut lines that are formed at equal intervals with the dividing portions sandwiched therebetween.

According to this structure, in a packaging box made of a corrugated board in which cut lines are formed on two sets of opposite side plates, a cut line at an appropriate position of the packaging box is provided with a bent portion which is bent inward at the cutting start end. , The straight portions extending from the bent portion are formed to be parallel to each other,
The length of the dividing part is made as large as possible by adopting the rear end part of the straight part, which is formed with the parts with outwardly bent parts with the dividing parts at equal intervals. As a result, it is possible to smoothly cut the packaging box without lowering its strength. Also, in a packaging box made of corrugated board in which cut lines are formed on two sets of opposing side plates, a cut start end portion is vertically oriented as a cut line at an appropriate position of the packaging box,
By adopting a straight portion extending from the starting end portion that extends in the up-down direction so that the interval gradually widens, the length of the dividing portion between the rear end portion of the straight portion and the next starting end portion can be reduced. By making it as large as possible, it is possible to smoothly cut the packaging box without lowering its strength.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the figure, the same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

First, the first embodiment shown in FIGS. 1 to 4 will be described. In this embodiment, two sets of opposing side plates 1, 1, which form the outer periphery of a corrugated board box, are formed.
The zipper-shaped cut lines 13 formed along the entire circumference of the packaging box in the middle of the vertical direction of 2, 2 are a set of two, and the cut start end is bent inward at an angle, and the bent part 14a is formed. The straight line portions 14b extending from the straight line portion 14b are formed to be parallel to each other, and an outward oblique bending portion 14c is formed at the rear end portion of the straight line portion 14b. 14d
Is a dividing portion formed at equal intervals in the length direction of the cut line 13. It should be noted that the cut line 13 is also formed on the stop margin portion 19.
A cut line 19b is formed so as to be connected to. The other structure is the same as that of the conventional example.

In the above structure, when the upper half of the packaging box is cut off by cutting the zipper-shaped cut line 13 of the packaging box in which the objects are stored, the short sides forming the left and right side surfaces of the packaging box. Of the pair of opposing side plates 1, 1, the side plate 1 has a cut line 13 at the center in the front-rear direction, which is inserted in the middle of the cut line 13 of the I-shape and is picked by a finger. By pulling, the plate portion 10 between the cut lines 13 is cut out in a strip shape, and the upper half of the packaging box is cut off, so that the stored object 11 can be displayed in a state of being stored in the lower half of the packaging box. .

Next, the operation of cutting along the cutting line 13 will be described in detail. Although the zipper-shaped cutting line 13 is designed to be continuously cut from the bent portion 14a at the cutting start end, At the dividing portion 14d between the bent portion 14c at the rear end of the two straight portions 14b and the next bent portion 14a, the bent portion 14c at the rear end of the two straight portions 14b is changed to the next bent portion 14a. Even if the rupture part 12 to be narrowed is narrowed, since the bent part 14c at the rear end is inclined outward, the rupture part 12 is easily connected to the bent part 14a, and the cut by the zipper-shaped cut line 13 is packaged. It will be possible to perform smoothly without interruption over the entire circumference of the box. That is, according to this configuration, even if the interval between the bent portion 14c at the rear end of the straight portion 14b and the next bent portion 14a is widened, the cutting can be performed smoothly without interruption and the rear end of the straight portion 14b. Bent part 14
The strength of the packaging box can be increased by widening the distance between c and the next bent portion 14a.

The first embodiment has been described above. Next, the second embodiment shown in FIGS. 5 to 8 will be described. In the first embodiment, the zipper-shaped cut line 13 is provided with a bent portion 14a that is bent obliquely inward at the cut start end, and straight portions 14b extending from the bent portion 14a are formed to be parallel to each other. At the rear end of the portion 14b, an outwardly bent portion 1 is formed.
Although the portion provided with 4c is formed over the entire circumference of the packaging box with the dividing portion 14d sandwiched at equal intervals, in the second embodiment, the short side on the left and right sides of the packaging box is formed. In order to prevent the strength of the pair of opposite side plates 1, 1 from being reduced, the first embodiment described above is performed at approximately the middle portion of the pair of opposite side plates 1, 1 on the short side in the vertical direction in the front half in the front-rear direction. Similar to the shape, it is a bent part 1 that bends inward at the beginning of the cut.
4a, the linear portions 14b extending from the bent portion 14a are formed to be parallel to each other.
At the rear end of b, a zipper-shaped cut line 13 is employed in which a portion having outwardly inclined bent portions 14c is formed at equal intervals with a dividing portion 14d interposed therebetween.
One of the opposite side plates 2 and 2 located on the front side
In the middle of the vertical direction in the vertical direction, the same cut start end as the conventional example is provided with a bent portion 15a which is bent obliquely inward, and straight portions 15b extending from the bent portion 15a are formed to be parallel to each other. Is
The rear ends of the two straight portions 15b and the next bent portion 15a
A zipper-shaped cut line 16 in which the portions having the dividing portions 15c are formed with the dividing portions 15c sandwiched at equal intervals.
Is provided. Further, the rear half of the pair of opposite side plates 1 and 1 on the short side and the rear half of the pair of opposite side plates 2 and 2 on the long side at approximately the middle portion in the vertical direction. A zipper-shaped cut line 17 connected to a rear end portion of the zipper-shaped cut line 13 is provided at a substantially middle portion of the side plate 2 in the vertical direction. This cut line 13
Between the cut line 17 and the cut line 17, I-shaped cut portions 9, 9 are formed at the start position and the stop position of the cut line 13. The zipper-shaped cut line 17 includes two straight line portions 18a which are parallel to each other, and a straight line portion 18a located on the lower side includes a bent portion 18b which is bent obliquely inward at the cut start end portion. The straight portion 18a located on the upper side has no bent portion. The cut line 17 is inclined rearward at a gentle angle on the pair of opposite side plates 1 and 1 on the short side. further,
A cut line 19c connected to the cut lines 13 and 16 is also formed on the stop margin portion 19. Other configurations are the same as those in the first embodiment.

In the case of the packaging box having the above-mentioned structure, one side plate 1 of the pair of opposed side plates 1 and 1 on the short side is picked up by hooking a finger from the cut portion 9 and pulling along the cut line 13. On the side, the plate portion 10 between the cut lines 13 is cut into a strip shape, and subsequently, of the pair of opposed side plates 2 and 2 on the long side, a zipper-shaped cut formed on one side plate 2 located on the front side. By pulling along the line 16, the plate portion 10 between the cut lines 16 is cut into a strip shape, and subsequently, the zipper shape formed on the other side plate 1 of the pair of opposite side plates 1 and 1 on the short side. By pulling along the cut line 13 of, the plate portion 10 between the cut lines 13 is cut into a strip shape and removed at the position of the cut portion 9, whereby almost the front half of the packaging box is vertically separated. In this state, in the rear half of the packaging box By cutting the straight portion 18a having the bent portion 18b on the lower side of the cut line 17 from the end so as to separate the upper half from the lower half, the upper half of the packaging box is finally lowered substantially. Will be separated from half.

By the way, in the second embodiment,
The cut line 13 similar to that of the first embodiment is formed on the pair of opposite side plates 1 and 1 on the short side, and the side plate 2 located on the front side.
The reason for forming the same cut line 16 as in the conventional example will be described below. A packaging box made of a corrugated board in which a pair of opposite side plates on the short side and zipper-like cut lines on the opposite side plate on the long side are formed. Therefore, the drop strength of the opposite side plate on the short side is lower than the drop strength of the opposite side plate on the long side by the shorter horizontal length of the side plate, and one pair of opposite side plates 1, 1 on the short side is formed. When a cut line similar to that of the above-mentioned conventional example is formed, since there is a problem in drop strength, a pair of opposite side plates 1 and 1 on the short side are provided with a bent portion 14a that is bent inward at the cut start end portion. , This bent part 14
The straight portions 14b extending from a are formed to be parallel to each other, and the rear end portion of the straight portion 14b is provided with the outwardly inclined bent portions 14c at equal intervals.
Adopting the zipper-shaped cut line 13 formed by sandwiching d, the length of the dividing portion 14d (the distance between the bent portion 14c at the rear end of the straight portion 14b and the bent portion 14a at the cut start end adjacent thereto) ) Is increased as much as possible to increase the strength of the pair of opposing side plates 1, 1 on the short side. In addition, the approximately rear half of the packaging box may be provided with a cut line (the straight line portion 18a located on the lower side having the bent portion 18b) that separates the upper half from the lower half so as to tear it upward. Straight part 1 located at
Although 8a is unnecessary for cutting, the strength of the packaging box is reduced unless there is a linear portion 18a located at the lower side with a bent portion 18b and there is no linear portion 18a located at the upper side. Therefore, two linear portions 18a parallel to each other are formed in the rear half of the packaging box. In other words, in this second embodiment, 3
A variety of cut lines 13, 16 and 17 were formed.

Further, the third embodiment shown in FIGS. 9 to 12 will be described. Two sets of facing side plates 1, 1, 2 and 2 forming the outer periphery of the packaging box made of corrugated board are almost vertically arranged. Two sets of zipper-shaped cut lines 20 are formed in the middle part over the entire circumference of the packaging box, and the cut start ends are oriented in the up-down direction, and the two start ends 20a oriented in the up-down direction.
Of the above, the lower end of the upper start end 20a and the lower start end 2
A straight part 20b extending from the upper end of 0a is formed so that the interval gradually increases. Denoted at 20c are dividing portions formed at equal intervals in the length direction of the cut line 20.
A cut line 20 is also formed on the stop margin portion 19. By the way, in the present embodiment, an I-shaped cut portion 9 is formed in the center portion in the front-rear direction of one side plate 1 of the pair of opposite side plates 1 on the short side, and this cut portion 9 is formed. At the boundary, the cut lines 20 are formed so that the directions thereof are opposite. More specifically, the cut lines 2 whose directions are opposite to each other with the cut portion 9 as the cutting start position and the cut portion 9 as a boundary
In 0A and 20B, the position of the stop margin portion 19 is the end portion. The other structure is the same as that of the conventional example.

In the above structure, when the upper half of the packaging box is cut off by cutting the zipper-shaped cut line 20 of the packaging box in the storage state of the object to be stored, the short sides forming the left and right side surfaces of the packaging box. Of the pair of opposite side plates 1, 1, the side of the one side plate 1 is cut with an I-shaped notch 9 formed in the middle of the cut line 20 in the front-rear direction, and is pinched with the finger, and the notch 9 is taken as a boundary. Cut lines 20 with opposite directions
A state in which the plate portion 10 between the cut lines 20 is cut into a band shape by pulling along the A and 20B, the upper half of the packaging box is cut off, and the object 11 is stored in the lower half of the packaging box. Can be displayed at.

Next, the operation of cutting along the cutting line 20 will be described in detail. In the zipper-shaped cutting line 20, the cutting start end portion 20a is oriented in the vertical direction, and a straight line extending from the starting end portion 20a oriented in the vertical direction. Since the portions 20b are formed so that the intervals gradually increase, the rear ends of the two linear portions 20b are separated from each other at the dividing portion 20c between the rear end portions of the two linear portions 20b and the next start end portion 20a. Even if the rupture portion 12 extending from one portion to the next start end portion 20a is narrowed, the distance between the rear end portions of the two straight portions 20b is widened, so that the rupture portion 12 is easily connected to the start end portion 20a, and the zipper shape The cutting along the cutting line 20 can be performed smoothly over the entire circumference of the packaging box without interruption. That is, according to this configuration, even if the distance between the rear end portions of the two straight line portions 20b and the next start end portion 20a is widened, the cutting can be performed smoothly without interruption and the rear end portion of the straight line portion 20b. It is possible to increase the strength of the packaging box by widening the distance between the next start end portion 20a and the next start end portion 20a.

By the way, the packaging line can be completed by adopting the cutting line 20 in the third embodiment to the portion of the cutting line 13 in the second embodiment.
In addition, the cut line 1 in the three embodiments described above
3, 16 and 17 are in a fully cut state in which a corrugated board that constitutes a packaging box is formed so as to penetrate in the thickness direction, or in a half-cut state in which a corrugated sheet on the inside and a liner on the back side are cut without cutting the front side liner. It may be formed in any state.

[0020]

As described above, according to the present invention, there is provided a packaging box made of corrugated cardboard in which the cut lines are formed on the two sets of opposite side plates, and the inside of the cut start end portion is the cut line at the proper position of the packaging box. It has a bent part that bends at an angle, and the straight parts extending from this bent part are formed so as to be parallel to each other, and at the rear end of the straight part there are outwardly bent parts with equal intervals. By adopting the one formed by sandwiching the dividing part, by making the length of the dividing part as large as possible, it is possible to cut smoothly without interruption without lowering the strength of the packaging box. You can Also, in a packaging box made of corrugated board in which cut lines are formed on two sets of opposite side plates,
By adopting a cut line at an appropriate position of the packaging box, the cut start end portion is oriented in the vertical direction, and the straight line portion extending from the start end portion facing in the vertical direction is formed so that the interval gradually widens. By making the length of the dividing portion between the end portion and the next start end portion as large as possible, it is possible to smoothly cut the packaging box without lowering its strength.

[Brief description of drawings]

FIG. 1 is a development view of a corrugated board packaging box according to the first embodiment of the present invention.

FIG. 2 is a perspective view showing a completed assembly state of the packaging box.

FIG. 3 is a perspective view showing a state in which the packaging box is separated vertically.

FIG. 4 is an enlarged perspective view of a main part of FIG. 3.

FIG. 5 is a development view of a corrugated board packaging box according to the second embodiment of the present invention.

FIG. 6 is a perspective view showing a completed assembled state of the packaging box.

FIG. 7 is a perspective view showing a state in which substantially the front half of the packaging box is vertically separated.

FIG. 8 is a perspective view showing a state in which substantially the rear half of the packaging box is separated vertically.

FIG. 9 is a development view of a corrugated board packaging box according to the third embodiment of the present invention.

FIG. 10 is a perspective view showing a completed assembled state of the packaging box.

FIG. 11 is a perspective view showing a state in which the packaging box is vertically separated.

FIG. 12 is an enlarged perspective view of a main part of FIG. 11.

FIG. 13 is a development view of a corrugated board packaging box in a conventional example.

FIG. 14 is a perspective view showing a completed assembled state of the packaging box.

FIG. 15 is a perspective view showing a state in which the packaging box is vertically separated.

FIG. 16 is a perspective view showing a display state in which substantially the upper half of the packaging box is removed.

[Explanation of symbols]

1,2 side plates 3,4 Bottom plate forming flap 5,6 Top cover forming flap 9 notches 10 Plate 11 Items to be stored 12 fracture 13 cut lines 14a Bent part 14b Straight part 14c Bent part 14d cutting part 15a Bent part 15b Straight section 15c Dividing part 16 cut lines 17 cut line 18a Straight part 18b Bent part 20 cut lines 20a starting end 20b Straight section 20c dividing section

Claims (2)

[Claims] 1. A corrugated board packaging box in which cut lines are formed at appropriate positions in the vertical direction of two sets of opposing side plates forming an outer circumference over the entire circumference, and some or all of the cut lines are 2 or more. Each set has a bent part that bends inwardly at the beginning of each cut, and straight parts extending from this bent part are formed so as to be parallel to each other. An outward bent part is formed at the rear end of the straight part. A corrugated board packaging box, characterized in that the parts provided with the parts are zipper-shaped cut lines formed by sandwiching the dividing parts at equal intervals. 2. A corrugated board packaging box in which cut lines are formed at appropriate positions in the vertical direction of two sets of opposed side plates forming an outer circumference over the entire circumference, and some or all of the cut lines are 2 or more. In this set, each cut start end faces in the vertical direction, and of the two start ends facing in the vertical direction, linear portions extending from the lower end of the upper start end and the upper end of the lower start end are gradually spaced. A corrugated board packaging box, characterized in that the widened portions are zipper-shaped cut lines that are formed at equal intervals with a dividing portion interposed therebetween.