JP2003054539A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box in which a bottom flap can be easily opened for collapsing a barrel into a flat state when the box is wasted. SOLUTION: There is provided a packaging box formed by a plastic sheet. A pair of opposite bottom flaps 18, 19 are cooperatively arranged at a lower end opening end of a barrel formed into a cylindrical shape through a folding line. An insertion piece 20 having insertion segments 20b protruded out of each of both side edges of a base end segment 20a in an outward direction is cooperatively arranged at an extremity end edge of one bottom flap 18. The other bottom flap 19 is formed with an insertion hole 21 in which the insertion piece 20 is inserted. The insertion hole 21 is made such that a central part at the end edge portion of the bottom flap 19 has a protrusion 21a slightly protruded out at the extremity end of the bottom flap 19. A tongue piece 22 having the same shape as that of the insertion hole 21 fitted into the insertion hole 21 is cooperatively arranged at the end edge portion of the extremity end of the bottom flap 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box formed of a plastic sheet, and more particularly to a packaging box in which a body portion can be easily crushed into a flat shape when discarded.

[0002]

2. Description of the Related Art For example, a product such as a cosmetic filled in a bottle container may be stored in a packaging box formed of a transparent plastic sheet so that the product can be seen in the stored state. As such a packaging box, there is one as shown in FIG. This packaging box 50
Is formed from a single blank sheet and has a rectangular tubular body 51.

A pair of inner flaps 52, 52 facing each other through a fold line are continuously provided at the upper end opening of the body 51, and a lid flap 53 adjacent to the inner flaps 52, 52 is folded. The lid flaps 53 are arranged in series through the line of sight, and in a state where the pair of inner flaps 52, 52 are folded inward, the lid flap 53 is folded inward, and the insertion piece 53a that is continuously arranged through the line of fold is attached to the tip thereof. When inserted into the upper end opening of the body 51, the upper end opening of the body 51 is closed.

Further, in the lower end opening of the body portion 51, as shown in FIG.
As shown in FIG. 5, a pair of inner flaps 54, 54 that are opposed to each other through a fold line are continuously provided, and a pair of opposed bottom flaps 55, 56 that are adjacent to the inner flaps 54, 54 are also provided.
Are continuously connected via a crease line, and one bottom flap 5
5, an insertion piece 57 is continuously provided at the tip edge of the 5, and an insertion hole 58 into which the insertion piece 57 is inserted is formed in the other bottom flap 56.

The insertion piece 57 has one bottom flap 55.
A base end portion 57a that is continuously provided on the front end edge of the
and a pair of inner flaps 54, 54 folded inward, while the other bottom flap 56 is folded inward, and further, one of the inner flaps 54, 54 is folded inward. When the bottom flap 55 is folded inward and the insertion piece 57 is inserted into the insertion hole 58, as shown in FIG. 11, the bottom flaps 55 and 56 are connected to each other and the lower end opening of the body 51 is closed. Is kept in the specified state.

[0006]

By the way, such a packaging box 50 is to be discarded after taking out the stored product, but it is bulky when the body portion 51 is formed in a rectangular tube shape. , Lid flap 53, inner flap 52, 5
2. Generally, the bottom flaps 55, 56 and the inner flaps 54, 54 are opened, and the body 51 is discarded in a flatly folded state.

Since the lid flap 53 is designed on the assumption that it is opened and closed when a product is taken in and out, it can be easily opened as a matter of course, but the insertion piece 57 is used.
When the bottom flaps 55, 56 connected to each other are to be opened by inserting the
The inserted insert 57 must be pulled out from the insertion hole 58.

As described above, in order to pull out the insertion piece 57 inserted into the insertion hole 58 from the insertion hole 58, the base end portion 57a of the insertion piece 57 exposed in the insertion hole 58.
Hook the tip edge of the to the fingertip to insert the base end 57a into the insertion hole 58.
The insertion portion 57b must be pulled out from the insertion hole 58 by pulling the insertion portion 57b outside from the insertion hole 57. However, as described above, in the packaging box 50 in which the insertion piece 57 is simply inserted into the insertion hole 58, Since the entire insertion piece 57 has entered the inner surface side of the bottom flap 56 in which the insertion hole 58 is formed, the insertion piece 57 tries to catch a fingertip on the tip edge of the base end portion 57a of the insertion piece 57, and the insertion piece 57 is inserted. When the fingertip is inserted into the hole 58, the insertion piece 5 is pushed by the fingertip as shown in FIG.
7 is further pushed inward, and it is difficult to hook the fingertip on the tip edge of the base end portion 57a of the insertion piece 57, and the bottom flaps 55 and 56 cannot be easily opened.

Therefore, an object of the present invention is to provide a packaging box in which the bottom flap can be easily opened to crush the body into a flat shape at the time of disposal.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is a packaging box formed of a plastic sheet, wherein the opening of the tubular body is formed. At the end, a pair of opposed flaps that close the opening of the body is continuously provided through a fold line,
One of the flaps is provided with a pair of insert pieces, each having an insert portion protruding outward from both side edges of the base end portion, and the other of the flaps is provided with the insert piece. The insertion hole is formed, the distal end edge of the base end portion of the insertion piece in the state where the insertion piece is inserted into the insertion hole, the other of the insertion hole is formed. The present invention provides a packaging box that does not get inside the flap.

As described above, in this packaging box, with the insertion piece inserted into the insertion hole, the distal end edge of the base end portion of the insertion piece has the other flap formed with the insertion hole. Since it does not enter the inner surface side, you can easily and reliably hook your fingertip on the tip edge of the base end of the insertion piece inserted in the insertion hole, and insert the insertion piece Can be immediately withdrawn from. Therefore, you can easily open the bottom flap and crush the body part flatly,
It is possible to eliminate the complication when the packaging box is discarded.

Specifically, as in the packaging box of the invention according to claim 2, a portion of the peripheral edge of the insertion hole, which corresponds to the tip end edge of the base end portion of the insertion piece, may be projected inward. ,
Like the packaging box of the invention according to claim 3, the distal end edge of the base end portion of the insertion piece is projected to the outside of the insertion hole, or the packaging box of the invention according to claim 4 In the peripheral portion of the insertion hole, a tongue piece having the same shape as that of the insertion hole is connected to the base end side of the other flap in which the insertion hole is formed, which is fitted into the insertion hole. It should be installed.

Further, like the packaging box of the invention according to claim 5, in the packaging box of the invention according to claim 2 or 3, the insertion hole is formed in the peripheral portion of the insertion hole. On the tip side of the other one of the flaps, which is fitted into the insertion hole, in the case where a tongue piece having the same shape as the insertion hole is continuously provided, it is sufficient to make a cut in the other flap, Unlike the case of completely punching out the insertion hole, it is not necessary to collect and discard the cut portion, which is advantageous in manufacturing the packaging box.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings. The packaging box 1 shown in FIG. 1 is assembled from a blank sheet 10 formed of a plastic sheet as shown in FIG. As a plastic sheet for forming the blank sheet 10, a sheet made of polyester such as polyethylene terephthalate or polypropylene having a thickness of about 0.1 to 0.8 mm can be used.

As shown in FIG. 3, in the blank sheet 10, a side plate 12 is connected to one side edge of a rear plate 11 via a fold line 23, and the other side end of the side plate 12 is connected. At the edge, the side plate 12, through the crease lines 24, 25, 26,
The front plate 13 and the bonding margin 14 are sequentially arranged.

Inner flaps 15, 15 and inner flaps 16, 16 are connected to the upper and lower edges of the side plates 12, 12 via fold lines 27, 27 and fold lines 28, 28, respectively. A lid flap 17 is connected to the upper edge of the rear plate 11 via a fold line 29. In addition,
An insertion piece 17a is continuously provided on the leading edge of the lid flap 17 via a fold line 30.

The lower edge of the rear plate 11 and the front plate 13
At the bottom edge of the bottom flap 1 through fold lines 31, 32.
8 and 19 are respectively connected in series, and the insertion piece 20 is continuously connected to the tip edge of one bottom flap 18, and
The other bottom flap 19 has a substantially rectangular insertion hole 21 into which the insertion piece 20 is inserted.

The insertion piece 20 has a width (bottom flap 19) of the insertion hole 21 which is continuously provided on the leading edge of the bottom flap 18.
The width of the base end 20a is slightly smaller than the width of the base end 20a, and the depth of the insertion hole 21 (the projection of the bottom flap 19) extends outward from both side edges of the base end 20a. The length of the bottom flap 18 is slightly smaller than the length (direction length), and a gap of about several millimeters is formed between the tip edge of the bottom flap 18 and the insertion portion 20b. There is.

The insertion hole 21 has an overhanging portion 21a that is slightly overhanging at the tip end side of the bottom flap 19 at the central portion of the edge portion of the bottom flap 19 on the base end side. A tongue piece 22 that has the same shape as the insertion hole 21 and is fitted into the insertion hole 21 is continuously provided at an end edge portion of the reference numeral 19 on the tip end side. In other words, the insertion hole 21 is not completely opened, but is opened by raising the tongue piece 22 formed by the cut.

The blank sheet 1 constructed as described above
To assemble the packaging box 1 from 0, fold lines 23, 2
When the side plates 12, 12, the front plate 13 and the bonding margin 14 are sequentially bent at 4, 25 and 26 and the bonding margin 14 is bonded to the inner surface of one side plate 12, as shown in FIG. The body B is formed.

Subsequently, the inner flaps 16 and 16 are folded at the crease line 2.
After being folded inward at 8 and 28, the bottom flap 19 is folded inward at the fold line 32, and then the bottom flap 18 is folded inward at the fold line 31 to insert the insertion piece 20, that is, the insertion portion 20b at the bottom. When it is inserted into the insertion hole 21 of the flap 19, the folded bottom flaps 18 and 19 are connected to each other, and the lower end opening of the body B is held in a closed state.

The packaging box 1 in which the lower end opening of the body B is closed as described above, as shown in FIGS. 4 and 5, is the base end portion of the insertion piece 20 inserted into the insertion hole 21. 20a
Since the tip edge of the plug is located outside the overhanging portion 21a of the insertion hole 21, the insertion piece 20 does not completely enter the inside of the insertion hole 21, and the base end portion of the insertion piece 20 Hook your fingertip on the tip edge of 20a to insert the insertion portion 21b into the insertion hole 21.
You can easily pull it out from. Therefore, as compared with the conventional packaging box in which the insertion piece completely enters the inside of the insertion hole, the operation of opening the bottom flaps 18 and 19 and crushing the body portion B into a flat shape can be easily performed.

Further, in this packaging box 1, the tongue piece 2 is provided on the peripheral portion of the insertion hole 21 without completely opening the insertion hole 21.
Since the structure in which two blanks 10 are connected to each other is adopted, it is only necessary to form a cut in the bottom flap 19 in the manufacturing stage of the blank sheet 10, and as in the case where the insertion hole 21 is completely opened, the insertion hole is completely inserted. There is also an advantage that it is not necessary to collect and discard the excised portion that has been excised in order to form

In the above embodiment, the insertion hole 21
The bulging portion 21a is formed by gently inwardly bulging the edge portion of the bottom flap 19 on the base end side in the above, but the shape of the bulging portion 21a is not limited to this. For example, as shown in FIGS. 6 (a) and 6 (b), the protruding portion 21 b is formed by partially projecting the edge of the insertion hole 21 on the base end side of the bottom flap 19 toward the inside. Is also possible.

Further, in the above-mentioned embodiment, the insertion hole 21
By supporting the tip edge of the base end portion 20a of the insertion piece 20 by the overhanging portions 21a and 21b formed on the peripheral edge of the insertion piece 20, the insertion piece 20 is prevented from completely entering the inside of the insertion hole 21. However, it is not limited to this, for example,
As shown in FIGS. 7A and 7B, the protrusion 20c is formed on the insertion piece 20 side by protruding the tip edge of the base end 20a of the insertion piece 20 to the outside. However, it is possible to prevent the insertion piece 20 from completely entering the inside of the insertion hole 21 by supporting the protruding portion 20c at the peripheral portion of the insertion hole 21.

In the above embodiment, the tongue piece 22 is connected to the edge of the insertion hole 21 on the tip end side of the bottom flap 19, but the invention is not limited to this. , For example, as shown in FIGS.
It is also possible to adopt a configuration in which the tongue piece 22 is continuously provided on the edge of the insertion hole 21 on the base end side of the bottom flap 19.
In this case, the base end portion 2 of the inserted insertion piece 20
Since the peripheral edge portion of the insertion hole 21 and the tongue piece 22 are connected to each other on the leading edge side of the insertion hole 0a, even if the protruding portion is not formed on the peripheral edge portion of the insertion hole 21 or the insertion piece 20, It is possible to prevent the insertion piece 20 from entering the insertion hole 21.

Further, in the above-mentioned embodiment, the insertion hole 21
The configuration in which the tongue piece 22 is continuously provided on the peripheral edge portion of the is adopted, but the configuration is not limited to this, and in the case of the form of the insertion hole 21 as shown in FIGS. 4, 6 and 7, It is also possible to omit the tongue piece 22. In particular, when the tongue piece 22 is omitted, the insertion piece 20 inserted into the insertion hole 21 is unlikely to project downward, and thus there is an advantage that the flatness of the bottom surface of the packaging box 1 is improved.

In each of the above-described embodiments, the connection structure of the bottom flaps 18 and 19 for closing the lower end opening of the body B has been described, but the invention is not limited to this.
It goes without saying that it can be adopted in various cases in which the opening is closed by folding the flap.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an assembly process of the packaging box of the same.

FIG. 3 is a plan view showing a blank sheet used for forming the packaging box of the above.

FIG. 4 is a bottom view showing the packaging box of the above.

FIG. 5 is a cross-sectional view showing a method of pulling out the insertion piece in the packaging box of the same from the insertion hole.

6A is a diagram showing a modified example of the insertion hole, and FIG. 6B is a diagram showing a state in which the insertion piece is inserted into the insertion hole of the above.

FIG. 7A is a view showing a modification of the insertion hole and the insertion piece,
(B) is a figure which shows the state which inserted the insertion piece same as the above into the insertion hole same as the above.

FIG. 8 (a) is a view showing another modification of the insertion hole and the insertion piece, and FIG. 8 (b) is a view showing a state in which the insertion piece of the same is inserted in the insertion hole of the same.

FIG. 9 is a perspective view showing a conventional packaging box.

FIG. 10 is a perspective view showing a state in which a bottom flap of the packaging box of the above is opened.

FIG. 11 is a bottom view showing the packaging box of the above.

FIG. 12 is an explanatory diagram for explaining problems of the packaging box of the above.

[Explanation of symbols]

1 packaging box 10 blank sheets 11 Rear plate 12 Side plate 13 Front plate 14 Adhesion allowance 15, 16 inner flap 17 Lid flap 18, 19 Bottom flap 20 Insert 20a base end 20b insertion part 20c Overhang part 21 insertion holes 21a, 21b Overhanging part 22 tongue B torso

Claims (5)

[Claims] 1. A packaging box formed of a plastic sheet, wherein a pair of opposed flaps that close the opening of the body is connected to an opening end of the body formed in a tubular shape through a fold line. The flap is provided with an insert piece having an insert portion projecting outward from both side edges of the base end portion at one end of the flap, and the other flap is provided with the above-mentioned insert piece. An insertion hole into which the insertion piece is inserted is formed, and in a state where the insertion piece is inserted into the insertion hole, the distal end edge of the base end portion of the insertion piece is formed with the insertion hole. A packaging box that is designed not to enter the inner surface side of the other flap that is installed. 2. The packaging box according to claim 1, wherein a peripheral edge portion of the insertion hole corresponding to a tip edge of a base end portion of the insertion piece projects inward. 3. The packaging box according to claim 1, wherein a distal end edge of a base end portion of the insertion piece projects to the outside of the insertion hole. 4. The same shape as the insertion hole, which is fitted into the insertion hole on the base end side of the other flap having the insertion hole formed in the peripheral portion of the insertion hole. The packaging box according to claim 1, wherein the tongue pieces are continuously provided. 5. A peripheral edge portion of the insertion hole, which has the same shape as the insertion hole, is fitted into the insertion hole on the tip end side of the other flap having the insertion hole formed therein. The packaging box according to claim 2 or 3, wherein tongue pieces are continuously provided.