JP4445031B1 - paper box - Google Patents

Abstract

[PROBLEMS] To smoothly separate a planned opening portion of a paper box that is divided into a box body and a planned opening portion by a planned breaking line, and can be formed by breaking the planned breaking line and separating the planned opening portion from the box body. Enable and improve the aesthetics of the opening edge.
A planned breaking line 13 of a paper box 10 includes a perforation 14, an outer half-cut line 15 outside the perforation 14, and an inner half-cut line 16 inside the perforation 14. When the perforation 14 is broken, the planned opening portion 12 is lifted and the box body 11 is pressed. Therefore, the outer surface easily peels to the box body 11 side, and the inner surface easily peels to the scheduled opening portion 12 side. Since there are half-cut lines 15 and 16 preceding the peeling direction, the peeling stops here, and it is prevented from expanding to the box body 11 or the planned opening portion 12 and damaging them. After the peeling communicates with the half-cut lines 15 and 16, the planned opening portion 12 is smoothly separated from the box body 11 along these lines, and a beautiful opening edge without jaggedness is formed.
[Selection] Figure 1

Description

The present invention relates to a paper box.
Specifically, the box main body and the planned opening portion are partitioned by a special planned break line provided on the surface, and the planned break line is broken to separate at least a part of the planned opening portion from the box main body to the surface. The present invention relates to a paper box capable of forming an opening.
The present invention also relates to a Thomson blade for forming the special planned fracture line.

For paper boxes made of cardboard, paperboard, cardboard, and other cardboards, an opening is formed on the surface, and the stored items can be taken out from this opening, which is commonly used for kitchen paper storage boxes and tissue paper storage boxes. Yes.
Specifically, with reference to FIG. 1 of the embodiment, this type of paper box is partitioned into a box body 11 and a planned opening portion 12 by a perforation 14 provided on the surface thereof. By breaking and separating at least a part of the planned opening portion 12 from the box body 11, an opening can be formed on the surface.

As is well known, the perforation 14 has a structure in which a large number of cut portions penetrating in the thickness direction of the paper and tie portions that leave the paper as they are alternately continued.
And if the box main body 11 is pushed and the opening plan part 12 is lifted, the load will concentrate on the perforation 14 which is a weak line, and a tie part will be cut | disconnected and the cut location will connect with the subsequent cut part. When the planned opening portion 12 is further lifted, the tie portion that follows the cut portion is cut, the cut portion communicates with the cut portion that further follows, and the tie portion is continuously cut and communicated with the cut portion. As a result, the entire perforation 14 is broken.

By the way, the detailed mechanism by which the tie portion of the perforation 14 is cut is as follows . As shown in FIG. 5A , the thick paper has a structure in which thin paper layers are laminated in the thickness direction. First, as shown in FIG. 2B, separation occurs between the layers due to strain stress, and the layers are separated. Then, as shown in FIG. 3C, the thin paper layers that have been separated and easily torn are sequentially torn. These are actually performed almost simultaneously.

Here, as indicated by an arrow in FIG. 5B, a downward force is applied to the box body 11 side, which is one side of the perforation 14, by pressing from above, and an opening on the other side of the perforation 14 is provided. An upward force is applied to the planned portion 12 side by lifting.
Therefore, the load on the perforation 14 acts in an oblique direction, not only for the vertical component force contributing to the cutting of the tie portion (the component force acting perpendicular to the surface of the paper box), but also for the cutting of the tie portion. A horizontal component force that does not contribute at all (a component force that acts horizontally on the surface of the paper box) is loaded.
As indicated by the arrow in FIG. 5C, the horizontal component force acts in the direction of the box body 11 on the outer surface side of the paper box and in the direction of the planned opening portion 12 on the inner surface side of the paper box.

Accordingly, the cutting direction of the tie portion is easily shifted from the perforation 14 to the box body 11 side in the outer layer of the paper box, and is easily shifted from the perforation 14 to the planned opening portion 12 side in the inner layer of the paper box. It is easy to peel off.
For this reason, particularly when the planned opening portion 12 is lifted roughly, the tie portion may be displaced from the perforation in the direction of cutting and peeling, and may not communicate with the subsequent cut portion. Thus, when the direction of the cutting and peeling of the tie portion is deviated, there is a problem that the perforation 14 is not smoothly broken.
Further, on the outer surface of the box, as described above, the direction of the cutting and peeling of the tie portion tends to shift from the perforation 14 to the box body 11 side, so that the outer surface layer of the box body 11 peels over a wide range. There is a problem that the appearance deteriorates.

Therefore, if the perforation is doubled inside and outside, the direction of cutting and peeling of the inner perforated tie part will shift to the outside, and the outer perforated tie part will be cut and peeled inward. Attempts have been made to prevent the displacement from expanding by communicating with the inner perforation when the displacement occurs (see the description of the claims of the patent document 1 and the drawings).
However, in the case of the paper box of Patent Document 1, the effect is also obtained when the direction of the cutting and peeling of the tie portion of the inner perforation is shifted inward or the direction of the cutting and peeling of the tie portion of the outer perforating is shifted outward. Absent. Therefore, as described above, the problem that the breakage is not smoothly performed and the problem that the opening is not formed cleanly are not completely solved.

By the way, it is also devised that the planned fracture line is composed only of half-cut lines formed by cutting each inside and outside of the box, and the outer half-cut line is arranged inside the inner half-cut line (Patent Document) 2 claims and drawings).
In this case, when the planned opening portion is lifted, the load is concentrated in the vicinity of the planned fracture line, and separation occurs between the paper layers starting from the half-cut line. From the principle described in FIG. 5 , the peeling direction is the box body direction (outside) on the outer surface of the paper box, and the opening direction (inside) on the inner surface of the paper box, so these delaminations merge at an intermediate point. In this way, the half-cut lines communicate with each other, and the planned opening portion is separated from the box body.

However, in this case, if the inner and outer half-cut lines have a shallow depth of cut, the release layer from the inside and the release layer from the outside starting from the inner and outer half-cut lines are shifted up and down in the thickness direction of the paper. Won't join together. For this reason, the half-cut line cannot be communicated and the opening cannot be formed cleanly.
Therefore, in practice, the depth of the cut of the half-cut line is set to be considerably deep as 1/4 to 3/4 of the thickness of the paper, and the total of the depth of cut exceeds the thickness of the paper, It is essential to ensure that the release layer and the release layer from the outside can be joined together (see paragraph 0020 of FIG. 3, FIG. 3 and the like).

  Further, if the distance between the inner and outer half-cut lines is too close, even if a slight delamination occurs due to an impact during transportation of the paper box, it is unintentionally opened. Therefore, in practice, it is essential to keep the distance between the two and a certain distance of 2 to 7 mm so that the inner and outer half-cut lines do not communicate even if some delamination occurs (paragraph 0020 in FIG. (See 2nd grade).

  If the inner and outer half-cut lines are deeply cut in this way, there is a risk of inadvertently opening a hole or separating the planned opening if a slight impact is applied to the paper box. . Further, when the distance between the inner and outer half-cut lines is long, when the planned opening portion is cut off, the peeled layer is exposed to the opening edge with a relatively large width, and there is a problem of poor appearance.

Japanese Patent No. 3422856 JP 2006-89070 A

  Therefore, the problem to be solved by the present invention is divided into a box body and an opening planned portion by a planned breaking line provided on the surface, and the breaking planned line is broken to remove at least a part of the opening planned portion from the box body. For a paper box in which an opening can be formed by separating, the break of the planned break line is made smooth, and the appearance of the opening edge when the planned opening portion is cut is improved.

In order to solve the above-described problems, in the paper box of the present invention, the planned break line is composed of three elements, a perforation in which cut portions and tie portions are alternately continuous, and inner and outer half cut lines.
Here, the outer half-cut line is arranged in parallel to the perforation on the perforation or closer to the box body than the perforation, and is formed by cutting from the outer surface to less than half of the thickness of the paper.
Further, the inner half-cut line is arranged in parallel to the perforation on the perforation or closer to the opening perforation than the perforation, and is formed by cutting from the inner surface to less than half of the thickness of the paper.

When cutting the tie part of the perforation by lifting the planned opening part, the cut part of the outer surface layer of the paper box is easily shifted from the perforation to the box body side as described above, and the cut part is cut in the inner layer. Is displaced from the perforation to the planned opening side and is easy to peel off.
However, half cut lines are formed on the inner and outer surfaces in advance of the direction in which the deviation occurs, so even if the direction of the cutting and peeling of the tie part deviates from the perforation, the half cut lines communicate with each other. The shift stops. Therefore, it is prevented that further cutting or peeling reaches the box main body or the planned opening portion and damages them.
And after the part of the cutting and peeling of the tie portion communicates with the half-cut line, the planned opening part is smoothly cut off from the box body along the half-cut line, so that a beautiful opening without jaggedness is formed. .

Here, the depth of cut of the inner and outer half-cut lines is preferably 0.05 mm to 0.15 mm, and more preferably 0.05 mm to 0.1 mm.
By reducing the depth of cut in this way, even if an impact is applied to the paper box, the half-cut line does not penetrate through the thickness direction of the paper and a hole is formed in the paper box, or the planned opening part is not inadvertently cut off. The impact resistance of the paper box is good.

The distance between the perforation and the inner and outer half-cut lines is preferably 0 mm to 1.5 mm, and more preferably 0 mm to 1.0 mm.
Thus, when both half-cut lines are close to the perforation, the release layer hardly appears at the opening edge when the planned opening portion is cut off, and the appearance is particularly good.

  Since the planned break line of the paper box is configured as described above, the planned opening portion can be smoothly cut off, and the opening edge can be formed beautifully.

The perspective view of the paper box of an embodiment Perspective plan view of the paper box of the embodiment AA sectional view of FIG. Paper box perspective view showing another example of planned opening Diagram showing the outline of the paper cutting mechanism

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

The paper box 10 according to the embodiment shown in FIGS. 1 to 3 is made of cardboard such as cardboard, paperboard, and cardboard.
On the surface of the paper box 10, a planned break line 13 having a special structure is provided, whereby the paper box 10 is partitioned into a planned opening portion 12 and a box body 11. When the planned opening portion 12 is lifted, the planned break line 13 is broken, and a portion of the planned opening portion 12 is cut off from the box body 11 to form an opening. Storage items such as cooking paper and tissue paper can be taken out from the opening.
Due to the special structure of the planned breaking line 13, the paper box 10 has good impact resistance, can smoothly separate the planned opening portion 12, and the opening edge is formed beautifully. Yes.

  Specifically, the paper box 10 according to the embodiment has a rectangular parallelepiped shape including a rectangular top surface and bottom surface facing vertically, a pair of rectangular side surfaces facing left and right, and a pair of rectangular end surfaces facing front and back. Therefore, the stored items can be stored in the internal space surrounded by these six surfaces.

The top surface of the paper box 10 is provided with an approximately rectangular ring-shaped break line 13 that is partially opened, and a substantially square portion surrounded by the break line 13 on the top surface constitutes the planned opening portion 12. ing. Further, the outer portion of the top surface of the planned fracture line, the bottom surface, the side surface, and the end surface constitute the box body 11.
A tab 12 a extending to the end face is attached to the planned opening portion 12, and a ruled line 17 is attached to the ring opening portion of the planned breaking line 13.

Specifically, the planned break line 13 having a special structure in the paper box 10 according to the embodiment includes three elements, a perforation 14, an outer half-cut line 15, and an inner half-cut line 16.
The perforation 14 has a structure in which a large number of cut portions 14a that penetrate in the thickness direction of the top surface paper and tie portions 14b that leave the thickness of the top surface as they are are continuously arranged as in the conventional case. Yes. That is, if it limits to the cut part 14a, it will form intermittently.
Here, the ratio of the length of the cut portion 14a and the tie portion 14b is not particularly limited, but when the length of the tie portion 14b is 1, the length of the cut portion 14a is preferably 1 to 5.

On the other hand, the outer half-cut line 15 is formed by cutting from the outer surface of the top surface to less than half of the thickness of the paper, and its position is close to the perforation 14 and outside the perforation 14 (box body side). Are slightly offset.
Further, the inner half-cut line 16 is formed by cutting from the inner surface of the top surface to less than half of the thickness of the paper, and the position thereof is close to the perforation 14 and inside the perforation 14 (on the opening planned portion side). ) Is slightly shifted.
Therefore, when the top surface is seen through from above, the perforation 14 is in a positional relationship sandwiched between the inner and outer half-cut lines 15 and 16.
As shown in the drawing, the inner and outer half cut lines 15 and 16 are continuously formed in parallel with the perforation 14 and over the entire circumference of the planned fracture line 13.

  As described above, since the inner and outer half-cut lines 15 and 16 are shallow, the impact resistance of the paper box 10 is sufficiently secured. Here, the depth of cut of the inner and outer half-cut lines 15 and 16 is not particularly limited as long as it is less than half the thickness of the paper, but is preferably 1/3 or less of the thickness of the paper, and more preferably 0.05 mm. It is still more preferable that it is -0.15 mm since the cut is particularly shallow and the impact resistance is good. In addition, the width | variety of the half cut lines 15 and 16 is not specifically limited.

  The configuration of the paper box 10 of the embodiment is as described above. Next, the operation of the planned breaking line 13 during the opening operation will be described.

  First, when the tab 12a attached to the planned opening portion 12 is pinched and pulled, the planned opening portion 12 is lifted and the load concentrates on the perforation 14 having the weakest strength among the planned breaking lines 13, as described in paragraph 0003. By such an action, the cutting of the tie portion 14b and the communication with the cut portion 14a occur continuously and break.

At this time, as described in paragraphs 0005 and 0006, the horizontal component of the load acts on the perforation 14, and the direction thereof is on the outer side of the top surface (on the box body 11 side) and on the inner surface of the top surface. It is on the inside (scheduled opening 12 side).
Therefore, on the outer surface of the top surface, the cutting direction of the tie portion 14b is shifted outward from the perforation 14, and the outer surface layer tends to peel off. On the inner surface of the top surface, the cutting direction of the tie portion 14b is on the inner side of the perforation 14. And the inner surface layer tends to peel off.

Here, since the inner and outer half-cut lines 15 and 16 are arranged in advance in the direction in which the cut and peeled portion of the tie portion 14b is shifted, when the deviation becomes large to a certain extent, the outer layer is formed with the tie portion 14b. The cut and peeled portion communicates with the outer half-cut line 15, and the cut and peeled portion of the tie portion 14 b communicates with the inner half-cut line 16 in the inner layer.
Therefore, the cut and peeled portion of the tie portion 14b does not further extend to the box body 11 and the planned opening portion 12, and it is prevented that they are torn and the appearance is impaired.

Further, when the cut and peeled portion of the tie portion 14 b communicates with the inner and outer half cut lines 15 and 16, the planned opening portion 12 is smoothly separated from the box body 11 along the half cut lines 15 and 16 thereafter. Therefore, an opening is easily formed in the paper box 10.
Thus, since the planned opening portion 12 is smoothly cut off from the box body 11 based on the structure of the planned breaking line 13, an opening having a complicated shape, such as the substantially star-shaped planned opening portion 12 shown in FIG. It can be formed.

Further, since the perforation 14 and the outer half-cut line 15 are close to each other, the width of the peeling layer from the perforation 14 exposed to the opening edge to the outer half-cut line 15 is very narrow. Therefore, the release layer is not conspicuous and there is no jaggedness, so the opening edge looks beautiful.
The distance between the inner and outer half-cut lines 15 and 16 and the perforation 14 is not particularly limited, but is preferably 1.5 mm or less because the release layer is not particularly noticeable.

  In addition, the part to which the above-mentioned ruled line 17 was attached | subjected remains connected to the box main body 11 after the opening scheduled part 12 cut | disconnects. For this reason, it is possible to open and close the opening by rotating around the ruled line 17 portion.

Further, except for the structure in which the planned breaking line 13 is composed of the perforation 14 and the inner and outer half-cut lines 15 and 16, the above embodiment is merely an example, and the shape of the paper box 10, the shape and position of the planned opening portion 12, The number and the like can be arbitrarily changed.
For example, the planar view shape of the paper box 10 and the shape of the planned opening portion 12 may be a circle, an ellipse, or a polygon. Further, the planned opening portion 12 may be provided on the side surface, the end surface, or the bottom surface of the paper box 10, or may be provided at a plurality of these locations. Further, unlike the embodiment, the planned opening portion 12 may be completely separated from the box body 11 and separated.

DESCRIPTION OF SYMBOLS 10 Paper box 11 Embodiment main body 12 Planned opening part 12a Tab 13 Planned break line 14 Perforation 14a Cut part 14b Tie part 15 Outer half cut line 16 Inner half cut line 17 Ruled line

Claims (3)

The box main body 11 and the planned opening portion 12 are partitioned by the planned breaking line 13 provided on the surface, and the opening is formed by breaking the planned breaking line 13 and separating at least a part of the planned opening portion 12 from the box main body 11. A formable paper box 10 comprising:
The expected fracture line 13 is
Perforations 14 in which cut portions 14a penetrating in the thickness direction of the paper and tie portions 14b in which the paper remains as it is, are alternately continued;
It is arranged closer to the box body 11 than the perforation 14, and when the opening planned portion 12 is lifted to cut the tie portion 14b of the perforation 14, it is displaced from the perforation 14 toward the box body 11 and peeled off. An outer half cut line 15 formed by cutting from the outer surface to less than half of the thickness of the paper , preventing the expansion of the peeled portion by communicating the outer surface layer ;
It is arranged closer to the planned opening portion 12 than the perforation 14, and when the planned opening portion 12 is lifted and the tie portion 14b of the perforation 14 is cut, the perforation 14 is shifted to the planned opening portion 12 side. A paper box comprising an inner half-cut line 16 formed by cutting from the inner surface to less than half of the thickness of the paper , which prevents the peeled portion from expanding by allowing the peeled inner surface layer to communicate .   2. The paper box according to claim 1, wherein the inner and outer half-cut lines 15 and 16 each have a cut depth of 0.05 mm to 0.15 mm.   The paper box according to claim 1 or 2, wherein a distance between the perforation 14 and the inner and outer half-cut lines 15 and 16 is 0 mm to 1.5 mm, respectively.

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