JPH1081326A - Paper box with zipper and cut blade for machining zipper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a zipper to be cut off even if either end of the zipper is pulled and also allow a joint to be neatly unsealed while preventing a hand from being injured by a cut portion by forming a zipper cut of a continuous wavy cut line exhibiting a sine curve shape. SOLUTION: A joint 14 is provided at a valley or between the valley and a ridge of waves with appropriate intervals in a direction of waves of a sine- curve-like wavy cut line 13. Typically, a wave height (h) and a pitch P of the wavy cut line 13 are specified in a range of approximately l to 5mm, while a width S of the joint 14 is specified in a range of approximately 0.3 to 2.5mm. When either part 15 of both ends of a zipper 11', of a paper box 10 is picked up and pulled, tearing force vector disperses along a curve of the wavy cut line 13 so that the tearing force is likely to be concentrated in a tangent line direction. Therefore, a part of the joint 14 is likely to be cut, and it can be cut off if either end of the zipper 11 is pulled at the time of unsealing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a zippered paper box. In particular, at the time of opening operation, pulling both ends of the zipper can be cut off, and the jumper can be easily and cleanly opened, and the cut part of the zipper will not hurt your hands. And a zipper cutting tool.

[0002]

2. Description of the Related Art In recent years, a method of opening a box using a zipper has been adopted in order to save the trouble of opening a packaging box in various fields including foods such as confectionery. That is, in order to tear and cut only a necessary portion of the carton 1, a cut 2 is cut in a perforated shape, or two bent cuts 3 in a "K" shape are provided in parallel like a key. Then, the carton is opened (see FIG. 10), and at the time of opening the carton, the cut 3 is cut or pushed off to open a part of the carton as shown in FIG. Proposed. Usually, a structure that opens in a belt shape is called a zipper.

[0003] As the shape of the zipper, various types have been proposed as shown in FIG. In each case, each cut is formed from a bent portion that is bent inward and a straight portion that is substantially straight, and a position that crosses between adjacent cuts is called a "jump". There is a connection.

[0004]

In such a paper box having a zipper-type opening means, as shown in FIG. 12, the zipper is cut in one direction as indicated by an arrow. . If it is pulled from the other opposite direction, the zipper is cut off at the bent portion during opening and cannot be easily opened.

[0005] In opening the zipper, the zipper is cut along a cut made up of a straight portion and a bent portion. The paper fibers are cut in a direction substantially perpendicular to the direction of pulling. As a result, the fibers of the "jump" are often cut in a dirty state with the fibers being jagged or rough. That is, the opening of the carton could not be opened cleanly (see FIG. 11).

Furthermore, if the user hits the straight cut 3 during opening, there is a problem that the user may cut his hand at the straight portion of the cut and damage it.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve these problems so that the zipper can be separated by pulling either of the ends of the zipper, and that the cut portion prevents the hand from being hurt. At the same time, it is intended to provide a zipper that allows the jumpsuit to be easily and neatly opened.

[0008]

In order to solve the above-mentioned problems, the present inventor has conducted intensive studies and found that the shape of the zipper cut is formed by a continuous wavy cut line forming a sine curve. It has been found that all the issues can be solved.

That is, the present invention is a paper box in which an opening zipper is engraved on a box body, and the shape of the zipper is formed by a continuous sinusoidal wavy cut line. A zipper characterized by providing a jumper at an appropriate interval in the wave direction or at a midpoint between a valley portion of the wave or a portion corresponding to the valley portion and the top so as to cross the cut line.

The zipper according to the present invention is not limited to a zipper formed by two parallel wavy cut lines, but also includes a zipper formed by a single wavy cut line. The paper box to which the present invention is applied is not limited to a paperboard paper box, but includes a cardboard box.

The “waveform break line” referred to in this specification is 3
It does not refer to a sawtooth-shaped cut line having a square pointed portion. The wave crest (top) and the wave bottom (valley) indicate a smooth sine curve line with a rounded sine curve.

The wave height h and the wave pitch P of the waveform break line
Is appropriately determined in consideration of the type of box material (carton material) to be used and the aesthetic appearance of the unsealed portion.
The wave pitch P is set within a range of 1 to 5 mm, and the above-mentioned numerical value is increased as the thickness of the paper is increased.

The width "S" of the "jump" is O.D. 3-2.5m
The value is appropriately determined within the range of m, but is set so that the above-mentioned numerical value increases as the thickness of the paper increases. "Tsunagi"
Is set at, for example, every two peaks or every three peaks at an appropriate interval in the valley of the waveform break line or in the middle between the valley and the top as described above. When the wave height or pitch of the waveform break line is large, it may be set for each peak.

[0014]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view showing an example of a paper box 10 with a zipper according to the present invention. In this example, a zipper is formed by two parallel wavy cut lines. FIG. 2 shows a state where the zipper is cut open in a strip shape and opened. FIGS. 3, 8, and 9 are perspective views showing other examples of the paper box 12 with the zipper 11, and the zipper is constituted by one wavy cut line. However, the zipper to which the present invention is applied is not limited to the box shown in the illustrated example. (A) through (d) in FIG.
Indicates an example of the shape of the zipper 11 of the present invention, and the reference numeral 13 indicates a waveform break line. Reference numeral 14 denotes a "jump" provided at an appropriate interval in the wave direction of the waveform break line or at an intermediate portion between the valley portion and the top portion of the wave. 16 is a ruled line.

The wave height h and the wave pitch P of the waveform break line are determined in consideration of the type of the box material (not only the case of the paper container blank but also the case of the cardboard) and the beauty of the unsealing portion. In a normal case, the wave height h of the sine curve-shaped cut line 13 is 1 to 5 mm, and the wave pitch P is 1 to 5
mm. In addition, the width S of the jumpsuit
Is O. It is appropriately determined within a range of 3 to 2.5 mm (see FIG. 5).

The zipper 11 is used for the paper container blank 4.
In the punching process of No. 0, the zipper processing cutting blade 30 can be attached to a punching die set as illustrated in FIG. That is, this blade 30
Is a plate-shaped metal piece having a length of 909 mm, a thickness of 0.7 mm, and a height of 23.8 mm provided with a continuous sine-curve blade 31 at the longitudinal end thereof as an example, as shown in FIG. In addition, a groove 32 having an appropriate width is formed at a portion corresponding to the valley portion of the corrugated blade 31 or at an intermediate portion between the portion corresponding to the valley portion and the portion corresponding to the top portion so as to form a jumper at an appropriate interval.

In use, the cutting blade 30 for processing is used.
The zipper of the present invention is formed on a blank 40 wound around a cutting board 41 or a cylinder or the like in a process of removing the blank 40 for a paper container, which is attached to the die 20 of the die set.

In the paper box 10 having the above structure, when the zipper 11 is pinched and pulled at any one of the portions 15 at both ends, the tearing force of the zipper is vector-dispersed along the curve of the sine-shaped cut line 13. . Jumpsuit 14
Is located between the valley or the valley and the top of the wave of the waveform break line, so that when the zipper is pulled, the tearing force applied to the zipper tends to concentrate in the direction of the tangent of the wave, so the direction of the tangent of the wave The part of the jumpsuit in is easy to cut.
Therefore, at the time of the opening operation, both ends of the zipper can be separated by pulling. Conventionally, there is a cut in a direction substantially perpendicular to the direction in which the zipper is pulled, so that it is difficult to cut and the shape after cutting is dirty, but in the case of the present invention, it is more neatly removed than this.

In the illustrated example, the zipper formed on the paperboard machine is described. However, the present invention is not limited to the paperboard machine.
Also applicable to cardboard boxes. When a zipper is formed on a cardboard box, it is called "back punching", and the front liner may not be completely removed. Even in such a case, the tearing force of the zipper is "vector-dispersed" by the action of the sine-curved cut line 13, so that the zipper jumper can be easily cut.

[0020]

As described above, according to the present invention, since the zipper cut is formed by a continuous wavy cut line having a sine curve, either of the right and left ends of the zipper is pulled at the time of opening. However, since the tearing force disperses in vector along the curved shape of the zipper cut, the jumpsuit can be easily separated. In addition, even if the hand hits the wavy cut, the cut is made up of a rounded cut line at both the crest (top) and the wave bottom (valley), so that it does not hurt the user's hand. Is done. In addition, it has an effect that the zipper can be opened neatly and neatly as compared with a conventional zipper cut portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a paper box with a zipper of the present invention.

FIG. 2 shows a state when the box is opened.

FIG. 3 is a perspective view showing another example of a paper box with a zipper.

FIG. 4 is a view showing an example of the shape of the zipper of the present invention.

FIG. 5 is an enlarged view of a sine curve-shaped waveform cut line, showing a wave height h, a wave pitch P, and a width S of a jumpsuit.

FIG. 6 is a perspective view showing an example of a zipper processing cutting blade.

FIG. 7 is a cross-sectional view showing a blank for a paper container blank.

FIG. 8 is a perspective view showing another example of a paper box with a zipper.

FIG. 9 is a perspective view showing another example of a paper box with a zipper.

FIG. 10 is a perspective view showing an example of a conventional paper box with a zipper.

FIG. 11 is a perspective view showing the opened state of the box.

FIG. 12 is an explanatory view showing the shape of a conventional zipper.

[Explanation of Signs] 10, 12 paper box 11 zipper 13 sine curve-shaped waveform break line 14 jumper 15 knob 30 cutting blade 31 waveform blade 32 groove

Claims (5)

[Claims] 1. A paper box in which an opening zipper is engraved on a cardboard box body, wherein the shape of the zipper cut is formed by a continuous sinusoidal wave-shaped break line. A paper box with a zipper, characterized in that a jumper is provided at an appropriate interval in the direction between the wave trough or a trough-corresponding part and the top so as to cross the cut line. 2. The paper box with a zipper according to claim 1, wherein the cuts of the zipper are formed by two parallel wavy cut lines. 3. The paper box with a zipper according to claim 1, wherein the cut of the zipper is formed by one wavy cut line. 4. The paper box with a zipper according to claim 1, wherein the paper box is a paper box made of paperboard or cardboard. 5. A sine-curved continuous wavy blade is formed at the tip of the hardware, and a valley-equivalent portion or a valley-equivalent portion and a top-equivalent portion of the wavy blade are provided for forming a jumpsuit. A zipper cutting blade characterized by cutting grooves.