JP7471932B2 - Seat storage box - Google Patents

Description

The present invention relates to a sheet storage box.

Sheet storage boxes are designed so that tissue paper and other sheets are stored in a box (also called a carton) made of cardboard or the like, and are removed from an opening on the top of the carton. In conventional sheet storage boxes, a plastic film (a so-called window film) is provided at the opening, and the sheets are removed through slits formed in the film (see, for example, Japanese Patent No. 4142238).

Furthermore, in recent years, there has been a growing need for sheet storage boxes that do not use resin films (so-called filmless cartons) in order to reduce the use of fossil fuels as a measure against global warming caused by _CO2 emissions and to prevent marine pollution by microplastics, etc. These sheet storage boxes have perforations on the top surface to form an outlet, and the multiple cuts that make up the perforations are arranged in a staggered pattern to make it easier to tear the perforations (see, for example, JP 2007-112503 A).

Patent No. 4142238 JP 2007-112503 A

The objective of the present invention is to provide a sheet storage box in which the sheets are less likely to tear during use.

The sheet storage box according to the first aspect has a box body that stores multiple stacked sheets, and a tearing score line formed on the top surface of the box body that, when torn, forms an outlet for the sheets on the top surface, the tearing score line has a plurality of first cuts arranged at a given interval on the periphery of the outlet and a plurality of second cuts arranged outside the periphery in a staggered pattern relative to the first cuts, and the tearing score line is formed so that an angle between the first cut and a third cut that is formed when the tearing score line is torn and connects one end of the first cut and one end of the second cut is an obtuse angle.

In this specification, a box is a container in which a sheet is stored. The top surface of the box refers to the surface from which the stored sheet is removed from the box. The tearing score line refers to a score line in which cuts and ties (the uncut portion between two cuts) are arranged alternately, and when a tie is broken, the adjacent cuts become a continuous cut. The periphery of the removal opening refers to the edge surrounding the removal opening formed on the top surface.

The cuts arranged at a given interval on the periphery of the outlet indicate that the cuts constituting the splitting score line are arranged at a given interval in the part that can become the periphery of the outlet when the splitting score line splits. The outside of the periphery refers to the part away from the outer periphery of the outlet that is formed when the splitting score line splits.

Staggered indicates that the second cuts are positioned to line up parallel to the ties between the first cuts. Formed when the cleavage score line cleaves indicates that the third cut is not formed before the cleavage score line cleaves, and is formed after the cleavage score line cleaves.

Connecting one end of the first cut to one end of the second cut means that the cleavage cut line cleaves from one end of the first cut to the end of the second cut that is the shortest distance between both ends of the second cut. An obtuse angle means that the angle between the third cut and the first cut is greater than 90 degrees and less than 180 degrees.

In the first aspect, the third cut formed when the tearing score line is torn connects one end of the first cut to one end of the second cut, and the angle between the first cut and the third cut at the connecting portion (corner) of the first cut and the third cut is an obtuse angle. As a result, the tearing score line remains easy to tear, and the sheet is less likely to tear even if it comes into contact with the corner of the first cut and the third cut formed after the tearing score line is torn. Therefore, in the first aspect, the sheet is less likely to tear when removing the sheet from the removal opening, while making it easy to open the removal opening.

In addition, in the first aspect, when inserting fingers into the outlet to remove sheets stored in the box from the outlet, there is a possibility that the inserted fingers may come into contact with the corners of the first and third cuts. However, in the first aspect, because the angle between the first and third cuts is obtuse, even if the inserted fingers come into contact with the corners of the first and third cuts, the strain on the fingers is small.

In the sheet storage box according to the second aspect, the end of the first cut extends toward the second cut. Here, the end of the cut refers to a portion near one end of the cut. Extending toward the second cut refers to the end of the first cut extending toward the second cut.

In the second aspect, the end of the first cut extends toward the second cut, which makes it easier for the force to tear the tearing score line to be transmitted from the first cut to the second cut. As a result, in the second aspect, even if the angle between the third cut and the first cut is an obtuse angle, the tearing score line is easier to tear, and it is possible to prevent the third cut from being formed in an unexpected direction when the tearing score line tears.

In the sheet storage box according to the third aspect, at least a portion of the first cut is curved inwardly of the outlet. Here, "at least a portion of the first cut" refers to all or a portion of the first cut. "Curved inwardly of the outlet" refers to a convex bend toward the inside of the periphery of the outlet.

In the third aspect, at least a portion of the first cut is curved inwardly of the outlet, so that the sheet passing through the outlet is more likely to come into contact with the portion that curves inwardly of the outlet. This makes it less likely that the sheet will come into contact with the corners of the first cut and the third cut, making the sheet even less likely to tear when it is taken out of the outlet.

In addition, in the third aspect, even if a finger is inserted into the outlet when removing a sheet stored in the box from the outlet, the inserted finger is likely to come into contact with the part of the outlet that curves inward. As a result, the finger inserted into the outlet is less likely to come into contact with the corners of the first and third cuts, further reducing the strain on the finger.

In the fourth aspect of the sheet storage box, the first cut is wavy. Here, wavy refers to a shape in which curved concave and convex portions are repeated in succession. In the fourth aspect, by making the first cut of the tearing score line wavy, when the tearing score line is torn, the wavy shape of the first cut remains on the periphery of the removal opening.

As a result, in the fourth aspect, the only part of the edge of the outlet that the sheet rubs against is the corrugated convex part. This makes it less likely for the sheet to come into contact with the corners of the first and third cuts, and the sheet is less likely to be damaged when it is taken out. In addition, the sheet being taken out is more likely to be supported by the wavy convex part formed on the edge of the outlet, preventing the sheet from falling. Furthermore, by making the first cut corrugated, the only part of the edge of the outlet that the fingers touch is the corrugated convex part, further reducing the strain on the fingers when using the sheet storage box.

In the sheet storage box according to the fifth aspect, the period of the waveform is longer than the tie between adjacent first cuts. Here, the period of the waveform refers to the distance between two adjacent convex portions or the distance between two adjacent concave portions of the waveform. The length of the tie between adjacent first cuts corresponds to the length of the second cut.

In the fifth aspect, the period of the waveform is longer than the ties between adjacent first cuts, so that the protruding portions of the waveform left on the periphery of the outlet when the tearing score line is torn can be reduced. This reduces the area where the sheet rubs on the periphery of the outlet, suppressing tearing of the sheet.

In addition, in the fifth aspect, the period of the waveform is longer than the ties between adjacent first cuts, so that the inclination of the convex portion of the waveform formed around the edge of the outlet becomes gentler. This makes the edge of the outlet smoother, making it even more difficult for the sheet to tear when it is taken out from the outlet. It also reduces the discomfort of fingers touching the edge of the outlet, and reduces strain on the fingers.

In the sixth aspect of the sheet storage box, the period of the waveform is 0.1 mm or more and 6 mm or less. A waveform period of 0.1 mm or more and 6 mm or less indicates that the scale of the waveform is minute. In the sixth aspect, by setting the period of the waveform to 0.1 mm or more and 6 mm or less, the distance between the convex or concave portions of the waveform becomes small. This further reduces the discomfort of fingers touching the periphery of the outlet and further reduces the strain on the fingers.

In addition, in the sixth aspect, the spacing between the corrugated convex or concave portions around the edge of the outlet is reduced, which makes it possible to prevent deterioration in the appearance (or appearance) of the sheet storage box caused by making the edge of the outlet corrugated.

In the seventh aspect of the sheet storage box, the period of the waveform is at least twice the wave height of the waveform. Here, the wave height of the waveform refers to the vertical distance from the top of the convex part to the bottom of the concave part of the waveform.

In the seventh aspect, the period of the waveform is set to at least twice the wave height of the waveform, so that the slope of the convex portion of the waveform formed around the edge of the outlet becomes gentler. This makes the edge of the outlet smoother, making it even more difficult for the sheet to tear when it is taken out from the outlet. It also further reduces the discomfort felt by the fingers touching the edge of the outlet, further reducing the strain on the fingers.

In addition, in the seventh aspect, the inclination of the corrugated convex portion formed around the edge of the outlet is gentler, which further reduces the deterioration of the appearance (or appearance) of the sheet storage box caused by making the edge of the outlet corrugated.

According to one aspect of the present invention, it is possible to provide a sheet storage box in which the sheets are less likely to tear during use.

FIG. 2 is a diagram showing a sheet storage box according to the embodiment. FIG. 2 is a view of the sheet storage box of FIG. 1 as seen from above. FIG. 13 is a diagram showing an example of a waveform of a first cut of a first cleavage score line. FIG. 13 is a diagram showing another example of the waveform of the first cut of the first cleavage score line. FIG. 13 is a diagram showing yet another example of the waveform of the first cut of the first cleavage score line. 1A and 1B are diagrams illustrating a positional relationship between a first cut and a second cut in an example of an embodiment. FIG. 7 is a diagram showing a state in which a third cut is formed between the first and second cuts in FIG. 6 . FIG. 11 is a diagram showing a positional relationship between a first cut and a second cut in another example of the embodiment. FIG. 13 is a diagram showing a positional relationship between a first cut and a second cut in still another example of an embodiment. 3 is a diagram showing the state in FIG. 2 where the second cleavage score line has been cleaved (the second opening has been opened). FIG. 11 is a diagram showing the state in FIG. 10 where the first splitting score line has been split (the first opening has been opened). 12 is a diagram showing a state in which the sheet passes through the outlet in FIG. 11 . 13A and 13B are diagrams showing the positional relationship between a first cut and a second cut in a conventional sheet storage box. FIG. 14 is a diagram showing the state after the perforation in FIG. 13 has been torn open.

The embodiment of the present invention will be described in detail with reference to the drawings. Note that in each drawing, common parts may be given the same reference numerals and explanations may be omitted. Also, in each drawing, the scale of each component may differ from the actual scale.

In this specification, a three-dimensional Cartesian coordinate system is used in three axial directions (X, Y, and Z directions), with the longitudinal or left-right direction of the sheet storage box defined as the X direction, the lateral or front-to-back direction defined as the Y direction, and the height or up-down direction defined as the Z direction. Additionally, "upper" refers to the upper side of the top surface of the box body in the height direction (Z direction) of the sheet storage box.

Figure 1 is a diagram showing a sheet storage box according to an embodiment. Figure 2 is a diagram showing Figure 1 as viewed from above the sheet storage box. The sheet storage box 100 according to this embodiment has a box body 10 that stores a plurality of stacked sheets S (sheet stack SL), and a tearing score line M1 (first tearing score line) that is formed on the top surface 11 of the box body 10 and that, when torn, forms an outlet 20 (first opening) for the sheets S on the top surface 11.

The box 10 is a container in which the sheet S is stored. In this embodiment, as shown in FIG. 1, the box 10 is formed in a substantially rectangular parallelepiped (including a cube) shape. Specifically, the box 10 has a top surface 11, a bottom surface 12, side surfaces 13 and 14, and side surfaces (end surfaces) 15 and 16. The top surface 11 and the bottom surface 12 face each other in the height direction (Z direction), the side surfaces 13 and 14 face each other in the short direction (Y direction), and the end surfaces 15 and 16 face each other in the longitudinal direction (X direction).

In this embodiment, the box 10 contains multiple stacked sheets S (sheet stack SL). The sheets S that make up the sheet stack SL are multiple sheets of thin tissue paper that are stacked in the height direction (Z direction). The top surface 11 of the box 10 indicates the surface from which the stored sheets S (sheet stack SL) are removed from the box 10.

The material of the box body 10 is not limited, and base paper made mainly of pulp is used. Here, base paper refers to a stiff and thick paper that is used as a material for assembling the box body 10. The pulp composition of the base paper can be a known composition for boxes. For example, the pulp blending ratio is 50 mass% or more, preferably 90 mass% or more, and more preferably 100 mass%. In this embodiment, for example, a paperboard (e.g., coated cardboard) made from virgin pulp, recycled paper pulp, etc. is used.

The dimensions of the box 10 are not limited and can be determined based on the amount and dimensions of the sheets S (sheet stack SL) to be stored. For example, the dimensions of the box 10 can be such that the length L1 in the longitudinal direction (X direction) of the box 10 is 100 mm or more and 300 mm or less, and preferably 150 mm or more and 280 mm or less. The width W1 in the transverse direction (Y direction) can be 100 mm or more and 150 mm or less, and preferably 100 mm or more and 130 mm or less. Furthermore, the height H in the height direction (Z direction) can be 30 mm or more and 150 mm or less, and preferably 40 mm or more and 100 mm or less.

The basis weight of the box 10 is not limited, but from the viewpoint of ensuring sufficient strength to withstand use, the basis weight of the base paper can be 200 g/m ² or more and 500 g/m ² or less, preferably 230 g/m ² or more and 450 g/m ² or less, and more preferably 270 g/m ² or more and 430 g/m ² or less. In this specification, the basis weight is measured in accordance with the basis weight measurement method of JIS P 8124 (1998).

The thickness of the box body 10 is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, if the box body 10 is paperboard (e.g., coated cardboard), the paper thickness of the box body 10 can be 0.1 mm or more and 3 mm or less, preferably 0.3 mm or more and 2 mm or less, and more preferably 0.5 mm or more and 1 mm or less.

The material of the sheet S is not particularly limited, and may be, for example, a sheet of paper, nonwoven fabric, cloth, or the like, and is preferably a paper sheet (hereinafter referred to as a paper sheet). When the sheet S is a paper sheet, base paper containing pulp as the main raw material is used. The pulp composition may be a known composition for paper sheets. For example, the blending ratio of pulp may be 50% by mass or more, preferably 90% by mass or more, and more preferably 100% by mass.

The pulp composition in the sheet S (paper sheet) is not particularly limited. For example, any ratio of softwood pulp such as NBKP (softwood kraft pulp) or NUKP (softwood unbleached pulp) and hardwood pulp such as LBKP (hardwood kraft pulp) or LUKP (hardwood unbleached pulp) can be used. The ratio of softwood pulp to hardwood pulp is not limited, but is preferably 10:90 to 80:20, and more preferably, the pulp composition has a higher ratio of softwood pulp to hardwood pulp. Waste paper pulp may be used as the pulp contained in the sheet S (paper sheet).

The basis weight of the sheet S is not particularly limited, but is preferably 5 g/ ^m2 or more and 80 g/ ^m2 or less in the case of paper, and 20 g/ ^m2 or more and 100 g/ ^m2 or less in the case of nonwoven fabric, depending on the number of plies. The basis weight can be measured in accordance with the provisions of JIS P 8124.

The thickness of the sheet S is not particularly limited, and the paper thickness measured under the environment of JIS P 8111 (1998) can be used. For example, the thickness of the paper sheet constituting the sheet S can be 50 μm or more and 500 μm or less per two plies, and is preferably 60 μm or more and 330 μm or less.

The sheet S (paper sheet) may also be embossed. Such embossing can be performed using a known embossing method.

The use of the sheet S is not limited to tissue paper, and it can be applied to products such as toilet paper, kitchen paper, paper towels, disposable diapers for babies or elderly care, sanitary napkins, etc. Sanitary thin paper such as tissue paper also includes sanitary thin paper containing moisturizing ingredients (for example, lotion tissue, etc.). The sheet S can be applied to industrial, household, and portable uses. Of these, household tissue paper is preferably used in this embodiment.

The number of plies of the sheet S can be one or more, preferably one ply, and more preferably two plies (two plies stacked). The shape of the sheet S is not particularly limited, and it is preferable that, for example, the shape of the two-ply sheet when folded is rectangular in a plan view.

The form of the sheet stack SL is not particularly limited, and examples include a sheet stack SL in which each sheet S is folded and stacked in a staggered manner (a so-called pop-up type sheet stack SL), a sheet stack in which multiple sheets (or multiple sets) of sheets S are simply stacked, and a sheet stack in which each sheet S is folded. From the viewpoint of pulling out the sheets S one by one or one set at a time, the form of the sheet stack SL is preferably a pop-up type sheet stack SL.

The dimensions of the sheet stack SL, for example, in the case of tissue paper, are a length in the longitudinal direction (X direction) of 150 mm or more and 250 mm or less, a length in the transverse direction (Y direction) of 60 mm or more and 130 mm or less, and a height in the height direction (Z direction) of 20 mm or more and 110 mm or less. Such sheet stacks can be manufactured, for example, by a rotary or multi-stand interfolder.

In this embodiment, the box has a first opening 20 for removing the sheet S. The first opening 20 is formed on the top surface 11 of the box 10 and constitutes an outlet 20 for the sheet S. The first opening 20 has a given length L2 in the longitudinal direction (X direction) and a given width W2 in the transverse direction (Y direction) that intersects with the longitudinal direction (X direction).

Here, the longitudinal direction (X direction) refers to a direction along a specific direction on the top surface 11 of the box body 10. The short direction (Y direction) that intersects with the longitudinal direction (X direction) refers to a direction perpendicular to the direction along the specific direction on the top surface 11 of the box body 10 or a direction that intersects with the braces (Figure 2).

The length L2 of the first opening 20 in the longitudinal direction (X direction) is 40% to 95% of the length L1 of the top surface 11 in the longitudinal direction (X direction), preferably 45% to 90%, and more preferably 50% to 85%. Here, the length of the top surface 11 is the entire length of the top surface 11 along the longitudinal direction (X direction), and the length of the first opening 20 is the length of the first opening 20 along the longitudinal direction (X direction) (see Figure 2).

The width W2 of the first opening 20 in the short direction (Y direction) is 10% to 85% of the width W1 of the top surface 11 in the short direction (Y direction), preferably 15% to 70%, and more preferably 20% to 60%. Here, the width W1 of the top surface 11 is the total width of the top surface 11 along the short direction (Y direction), and the width W2 of the first opening 20 is the dimension at which the width of the first opening 20 is maximum along the longitudinal direction (X direction) (maximum width of both ends 22, 23) (see FIG. 2).

In this embodiment, the width W2 of the first opening 20 increases from the center 21 side in the longitudinal direction (X direction) of the first opening 20 toward both ends 22, 23 in the longitudinal direction (X direction). In this embodiment, the width W2 in the short direction (Y direction) of the first opening 20 increases toward the edges E11, E12 of the top surface 11 as it progresses from the center 21 side of the first opening 20 along the longitudinal direction (X direction) toward both ends 22, 23 (the edges E13, E14 sides of the top surface 11) (FIG. 2).

In this embodiment, the periphery E2 of the first opening 20 is curved at both ends 22, 23. Here, being curved at both ends 22, 23 means that the periphery E2 of the first opening 20 is curved in a convex shape toward the outside of the first opening 20 at both ends 22, 23 of the first opening 20.

In this embodiment, the width W2 of the first opening 20 expands in the short-side direction (Y direction) at the center 21 in the longitudinal direction (X direction) of the first opening 20. In this embodiment, the width W2 in the short-side direction (Y direction) at the center 21 of the first opening 20 expands toward the edges E11 and E12 of the top surface 11 along the short-side direction (Y direction) (Figure 2).

The length L3 of the central portion 21 of the first opening 20 in the longitudinal direction (X direction) is 1% to 40% of the length L1 of the top surface 11 in the longitudinal direction (X direction), preferably 5% to 30%, and more preferably 10% to 20%. The width W3 of the central portion 21 of the first opening 20 in the transverse direction (Y direction) is 10% to 40% of the width W1 of the top surface 11 in the longitudinal direction (X direction), preferably 15% to 35%, and more preferably 20% to 30% (see Figure 2).

In this embodiment, the periphery E2 of the first opening 20 is curved in the short direction (Y direction) at the central portion 21 of the first opening 20. Here, curving in the short direction (Y direction) at the central portion 21 means that the periphery E2 of the first opening 20 is curved in a convex shape outward in the short direction (Y direction) of the first opening 20 at the central portion 21 in the longitudinal direction (X direction).

In the sheet storage box 100 of this embodiment, the tearing score line M1 has multiple first cuts C1 arranged at given intervals on the periphery E2 of the outlet 20 (Figure 2). The tearing score line M1 indicates a cut line where the first cuts C1 and ties T1 (the uncut portions between two first cuts C1) are arranged alternately, and when the tie T1 or the periphery of the tie T1 breaks, the adjacent cuts on both sides become continuous cuts.

In addition, in the first splitting score line M1, the length of each cut C1 can be 0.3 mm or more and 40 mm or less, preferably 0.5 mm or more and 35 mm or less, and more preferably 1 mm or more and 30 mm or less. Also, the length of each tie T1 can be 0.3 mm or more and 2.5 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.2 mm or less.

Here, the periphery E2 of the outlet 20 refers to the edge (inner edge E15) that surrounds the outlet 20 formed on the top surface 11 (Figure 2). Also, the first cuts C1 arranged at a given interval on the periphery E2 of the outlet 20 indicate that the first cuts C1 that make up the splitting score line M1 are arranged at a given interval in the part that can become the periphery E2 of the outlet 20 when the splitting score line M1 is split (Figure 2).

In the sheet storage box 100 according to this embodiment, at least a portion of the first cut C1 is curved inwardly of the outlet 20. Here, "at least a portion of the first cut C1" refers to all or a portion of the first cut C1. Curving inwardly of the outlet 20 refers to bending in a convex shape toward the inside of the periphery E2 of the outlet 20.

Specifically, the first cut C1 is a waveform U. Here, the waveform U refers to a shape in which curved recesses B and protrusions D are repeatedly and continuously arranged. In this embodiment, by making the first cut C1 of the splitting score line M1 a waveform U, when the splitting score line M1 splits, the waveform U of the first cut C1 remains on the periphery E2 of the outlet 20 (Figure 11).

In the sheet storage box 100 according to this embodiment, the period P of the waveform U is preferably 0.1 mm or more and 6 mm or less, more preferably 0.3 mm or more and 4.5 mm or less, and even more preferably 0.5 mm or more and 3 mm or less. Here, the period P of the waveform U indicates the distance between two adjacent convex portions D (D1, D2) or the distance between two adjacent concave portions B (B1, B2) of the waveform U (FIG. 3). Note that the period P of the waveform U being 0.1 mm or more and 6 mm or less indicates that the scale of the waveform U is minute.

In the sheet storage box 100 according to this embodiment, the period P of the waveform U is at least twice the wave height H of the waveform U. Here, the wave height H of the waveform U refers to the vertical distance H from the top of the convex portion D of the waveform U to the bottom of the concave portion B.

In this embodiment, for example, a waveform W1 whose period P1 is about 5 times the wave height H1 can be used as the waveform U constituting the first cut C1 of the first cleavage cut line M1 (Figure 3). A waveform W1 whose period P2 is about 10 times the wave height H2 can be used (Figure 4). Furthermore, a waveform W1 whose period P3 is about 2 times the wave height H3 can be used (Figure 5).

The wave height H of the waveform U is preferably 0.05 mm or more and 3 mm or less, more preferably 0.1 mm or more and 2.5 mm or less, and even more preferably 0.3 mm or more and 2 mm or less. Note that the wave height H of the waveform U being in the range of 0.05 mm or more and 3 mm or less indicates that the scale of the waveform U is minute.

In this embodiment, second openings 30, 40 for cleaving the first cleavage score line M1 are formed on both ends 22, 23 in the longitudinal direction (X direction) of a portion 11A of the top surface 11 surrounded by the first cleavage score line M1. The portion 11A of the top surface 11 occupies an area less than half of the top surface 11, and is a portion where a first opening 20 is formed in the top surface 11 when the first cleavage score line M1 is cleaved (Figures 2 and 10). The second openings 30, 40 form triggers for the second openings 30, 40 to cleave the first cleavage score line M1.

A part (a part formed by a wave shape) of the periphery E3 of the second opening 30, 40 curves from the center 21 side in the longitudinal direction (X direction) of the first opening 20 toward both ends 22, 23 in the longitudinal direction (X direction). Here, "curving from the center 21 side in the longitudinal direction (X direction) of the first opening 20 toward both ends 22, 23 in the longitudinal direction (X direction)" means that the periphery E3 of the second opening 30, 40 curves convexly toward the outside in the longitudinal direction (X direction) of the first opening 20 (Figs. 1 and 2).

In this embodiment, a second tearing score line M2 is formed in a portion 11A of the top surface 11, which when torn apart forms second openings 30, 40. The second tearing score line M2 alternates between cuts C4 and ties T2 (the uncut portion between two cuts C4, C4), and when a tie T2 breaks, the adjacent cuts C4, C4 become a continuous cut.

In addition, in the second splitting cut line M2, the length of each cut C4 can be 0.3 mm or more and 40 mm or less, preferably 0.5 mm or more and 35 mm or less, and more preferably 1 mm or more and 30 mm or less. Also, the length of each tie T2 can be 0.3 mm or more and 2.5 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.2 mm or less.

In this embodiment, the cut C4 of the second splitting score line M2 is configured in a wavy shape (Figure 2). The wavy shape that configures the cut C4 of the second splitting score line M2 is not particularly limited, and for example, the same wavy shape as the above-mentioned wavy shape U can be used. In this embodiment, by making the cut C4 of the splitting score line M2 wavy, the wavy shape of the cut C4 remains on the periphery E3 of the second opening 30, 40 when the splitting score line M2 splits (Figure 10).

In the sheet storage box 100 of this embodiment, the tearing score line M1 further has multiple second cuts C2 arranged in a staggered pattern with respect to the first cut C1 on the outside of the periphery E2. The outside of the periphery E2 refers to the portion of the outlet 20 that is formed when the tearing score line M1 is torn and is away from the periphery E2 (FIGS. 2 and 6). Arranged in a staggered pattern refers to the second cuts C2 being arranged in a position parallel to the ties T1 between the first cuts C1 (FIGS. 2 and 6).

The shortest distance between the periphery E2 of the outlet 20 and the second cut C2 can be any distance as long as the tearing score line tears and the third cut is formed. The shortest distance between the periphery E2 of the outlet 20 and the second cut C2 can be, for example, 0.3 mm or more and 2.5 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.2 mm or less.

In the sheet storage box 100 of this embodiment, the tearing score line M1 is formed so that the angle θ1 between the first cut C1 and the third cut C3, which is formed when the tearing score line M1 is torn and connects one end V1 of the first cut C1 and one end V2 of the second cut C2, and the first cut C1 is an obtuse angle (FIGS. 6 and 7). Here, "formed when the tearing score line M1 is torn" means that the third cut C3 is not formed before the tearing score line M1 is torn, and the third cut C3 is formed after the tearing score line M1 is torn (FIG. 7).

In addition, connecting one end V1 of the first cut C1 and one end V2 of the second cut C2 means that the cleavage cut line M1 cleaves from one end V1 of the first cut C1 to one end V2 of the second cut C2 that is the shortest distance between both ends V2 of the second cut C2 (Figures 6 and 7). An obtuse angle means that the angle θ1 between the third cut C3 and the first cut C1 is greater than 90 degrees and less than 180 degrees (Figure 7).

In the sheet storage box 100 according to this embodiment, the end CE of the first cut C1 extends toward the second cut C2. Here, the end CE of the first cut C1 refers to the portion CE closer to one end V1 of the first cut C1. Extending toward the second cut C2 means that the end CE of the first cut C1 extends toward the second cut C2 (FIG. 6).

In the sheet storage box 100 according to the embodiment, as shown in FIG. 6, the period P of the waveform U may be shorter than the tie T1 between adjacent first cuts C1. Also, as shown in FIG. 8, the period P of the waveform U may be the same length as the tie T1 between adjacent first cuts C1. Furthermore, as shown in FIG. 9, the period P of the waveform U may be longer than the tie T1 between adjacent first cuts C1.

Here, the length of the tie T1 between adjacent first cuts C1 corresponds to the length Q (Q1, Q2, Q3) of the second cut (FIGS. 6, 8, 9). Note that in this embodiment, the second cut C2 may be curved convexly in a direction away from the first cut C1, as shown in FIG. 9.

The effects of this embodiment will be described below. In this embodiment, as described above, the third cut C3 formed when the splitting cut line M1 splits connects one end V1 of the first cut C1 and one end V2 of the second cut C2. The angle θ1 between the first cut C1 and the third cut C3 at the connection (corner) CO between the first cut C1 and the third cut C3 is an obtuse angle. In other words, the angle θ1 between the first cut C1 and the third cut C3 is not an acute angle (Figure 7).

As a result, in this embodiment, the tearing score line M1 remains easy to tear, but even if the sheet S comes into contact with the corners CO of the first cut C1 and the third cut C3 that are formed after the tearing score line M1 is torn, the sheet S is less likely to tear. Therefore, in this embodiment, the sheet S is less likely to tear when removing the sheet S from the removal opening 20, while making it easy to open the removal opening 20 (Figures 7 and 12).

In addition, in this embodiment, when inserting fingers into the outlet 20 to remove the sheet S stored in the box 10 from the outlet 20, there is a possibility that the inserted fingers will touch the corner CO between the first cut C1 and the third cut C3. However, in this embodiment, since the angle θ1 between the first cut C1 and the third cut C3 is an obtuse angle, even if the inserted fingers touch the corner CO between the first cut C1 and the third cut C3, the burden on the fingers (e.g., the fingers are not hurt or injured) is small (Figures 7 and 11).

In this embodiment, as described above, the end CE of the first cut C1 extends toward the second cut C2, which makes it easier for the force to tear the tearing score line M1 to be transmitted from the first cut C1 to the second cut C2. As a result, in this embodiment, even if the angle θ1 between the third cut C3 and the first cut C1 is an obtuse angle, the tearing score line M1 is easier to tear, and it is possible to prevent the third cut C3 from being formed in an unexpected direction when the tearing score line M1 tears (Figures 6 to 8).

In this embodiment, as described above, at least a portion of the first cut C1 curves inwardly of the outlet 20, so that the sheet S passing through the outlet 20 is more likely to come into contact with the portion that curves inwardly of the outlet 20. This makes it less likely that the sheet S will come into contact with the corners CO of the first cut C1 and the third cut C3, making the sheet S even less likely to tear when it is taken out of the outlet 20 (FIGS. 7 and 12).

Specifically, as described above, the only part of the edge E2 of the outlet 20 against which the sheet S rubs is the wavy convex portion D. This makes it difficult for the sheet S to come into contact with the corners CO of the first cut C1 and the third cut C3, and the sheet S is less likely to be damaged when it is taken out. In addition, the sheet S being taken out is more likely to be supported by the wavy convex portion D formed on the edge E2 of the outlet 20, preventing the sheet S from falling (Figs. 7 and 12).

In addition, in this embodiment, even if a finger is inserted into the outlet 20 when removing the sheet S stored in the box 10 from the outlet 20, the inserted finger is likely to touch the part of the outlet 20 that curves inward. Therefore, the finger inserted into the outlet 20 is unlikely to come into contact with the corners CO of the first cut C1 and the third cut C3, further reducing the strain on the finger (Figs. 7 and 11).

Specifically, by making the first cut C1 into a corrugated U shape, the only part of the periphery E2 of the outlet 20 that comes into contact with the fingers is the convex part D of the corrugated U, further reducing the strain on the fingers when using the sheet storage box 100 (Figures 7 and 11).

In this embodiment, as described above, if the period P of the waveform U is longer than the tie T1 between adjacent first cuts C1, the convex portion D of the waveform U remaining on the periphery E2 of the outlet 20 when the tearing score line M1 is torn can be reduced (Figure 9). This reduces the area where the sheet S rubs against the periphery E2 of the outlet 20, suppressing tearing of the sheet S (Figures 7 and 12).

In addition, in this embodiment, when the period P of the waveform U is longer than the tie T1 between adjacent first cuts C1, the slope of the convex portion D of the waveform U formed on the periphery E2 of the outlet 20 becomes gentler (Figure 9). This makes the periphery E2 of the outlet 20 smoother, making it even more difficult for the sheet S to tear when it is taken out from the outlet 20. It also reduces the discomfort of the fingers touching the periphery E2 of the outlet 20, and reduces the strain on the fingers.

In this embodiment, as shown in FIG. 9, by curving the second cut C2 in a convex shape in a direction away from the first cut C1, if it is assumed that a portion of the first cut is continuous, a portion of the continuous first cut can be cut out and shifted outside the periphery E2 of the outlet 20 to design the second cut. This makes it easy to design the second cut relative to the first cut.

In this embodiment, as described above, by setting the period P of the waveform to 0.1 mm or more and 6 mm or less, the spacing between the convex portions D or concave portions B of the waveform U becomes smaller (Figs. 3 to 5 and 11). This further reduces the discomfort felt by the fingers touching the periphery E2 of the outlet 20, and further reduces the strain on the fingers.

In addition, in this embodiment, the spacing between the convex portions D or concave portions B of the corrugated U at the periphery E2 of the outlet 20 is reduced, which makes it possible to prevent deterioration in the appearance (or appearance) of the sheet storage box 100 caused by making the periphery E2 of the outlet 20 corrugated U (Figures 3 to 5, Figure 11).

In this embodiment, as described above, by making the period P of the waveform U at least twice the wave height H of the waveform U, the slope of the convex portion D or concave portion B of the waveform U formed on the periphery E2 of the outlet 20 becomes gentler (Figs. 3 to 9). This makes the periphery E2 of the outlet 20 smoother, making the sheet S less likely to tear when it is taken out from the outlet 20 (Fig. 12). It also further reduces the discomfort of the fingers touching the periphery E2 of the outlet 20, further reducing the strain on the fingers (Fig. 11).

In addition, in this embodiment, the slope of the convex portion D or concave portion B of the waveform U formed on the periphery E2 of the outlet 20 is gentle, which further reduces the deterioration of the appearance (or appearance) of the sheet storage box 100 caused by making the periphery E2 of the outlet 20 into a waveform U (Figures 3 to 5, Figure 11).

As described above, when removing sheets S from the outlet of the sheet storage box, the sheets are likely to get stuck and break at both ends in the longitudinal direction (X direction) of the outlet. In contrast, in this embodiment, the width W2 of the first opening 20 constituting the outlet OP becomes wider from the center 21 side in the longitudinal direction (X direction) of the first opening 20 toward both ends 22, 23 in the longitudinal direction (X direction), so that the width W2 of the first opening 20 is wider at both ends 22, 23 than at the center 21 side in the longitudinal direction (X direction). Therefore, the sheets S are less likely to get stuck at both ends in the longitudinal direction of the outlet OP, where the sheets S are likely to get stuck and break when removing the sheets S, and breakage can be suppressed (FIGS. 1, 2, 11, 12).

In this embodiment, as described above, the periphery E2 of the first opening 20 is curved at both ends 22, 23 in the longitudinal direction (X direction) of the first opening 20, which reduces the resistance to the pulled-out sheet S at both ends 22, 23 of the outlet OP where the sheet S is easily rubbed and broken. Therefore, in this embodiment, the sheet S is less likely to get stuck at the outlet OP, and breaking of the sheet S can be suppressed.

In this embodiment, as described above, the central portion 21 of the first opening 20 in the longitudinal direction (X direction) expands in the lateral direction (Y direction), making it easier to insert fingers into the central portion 21 of the open outlet OP. This makes it easier to pull out the upper layer of sheets S (e.g., the first sheet or first set of sheets S1) that tend to get stuck in the outlet OP. Also, sheets S that fall into the box body 10 during use can be easily removed by inserting fingers into the box body 10. Furthermore, when inserting fingers into the first opening 20, the discomfort felt when the fingers touch the periphery E2 of the first opening 20 is further reduced, and the strain on the fingers can be further reduced (Figs. 1, 2, 11, and 12).

In this embodiment, as described above, the periphery E2 of the first opening 20 is curved in the short direction (Y direction) at the central portion 21 in the longitudinal direction (X direction) of the first opening 20, so that when the fingers are inserted into the central portion 21 of the first opening 20, the fingers can smoothly touch the periphery E2 of the first opening 20. This further reduces the discomfort of the fingers touching the periphery E2 of the first opening 20, and further reduces the burden on the fingers.

In this embodiment, as described above, the cut C1 of the first tearing score line M1 formed on the top surface 11 is a wavy U, and when the tearing score line M1 is torn, the wavy U of the first cut C1 remains on the peripheral edge E2 of the outlet 20. Therefore, in this embodiment, by tearing the first tearing score line M1 formed on the top surface 11, an outlet 20 (OP) for the sheet S with a wavy U peripheral edge E2 can be formed on the top surface 11 of the box body 10 (Figures 1 to 12).

In addition, in this embodiment, as described above, the width W2 in the short side direction (Y direction) of the first opening 20 narrows in the short side direction (Y direction) as it moves from both ends 22, 23 of the first opening 20 toward the center 21 along the longitudinal direction (X direction). Therefore, when splitting the first split score line M1 to form the first opening 20, the first split score line M1 can be split smoothly by splitting the first split score line M1 from both ends 22, 23 of the first opening 20, which have a wide width W2 in the short side direction (Y direction), toward the center 21, which has a narrow width W2 (FIGS. 1, 2, 10 to 12).

In this embodiment, as described above, by forming the second openings 30, 40 for splitting the first split score line M1 in the part 11A of the top surface 11 surrounded by the first split score line M1, it is possible to insert a fingertip into the second openings 30, 40 and pull the inserted fingertip upward over the part 11A of the top surface 11. This allows the second openings 30, 40 to act as a trigger when splitting the first split score line M1, making it easier to form the first opening 20 by splitting the first split score line M1 formed on the top surface 11 (FIGS. 1, 2, 10, 11).

In this embodiment, as described above, by making the cut C4 of the second splitting score line M2 that constitutes the second openings 30, 40 wavy, the portion of the periphery E3 of the second openings 30, 40 that the fingertips touch is only the convex portion of the wave shape U2. Therefore, when splitting the first splitting score line M1 to form the first opening 20 in the top surface 11, the burden on the fingers can be reduced when inserting the fingertips into the second openings 30, 40 or when pulling the inserted fingertips upward over a portion 11A of the top surface 11 (Figs. 1 to 5, 10).

In this embodiment, as described above, a part (a part configured in a wavy shape) of the periphery E3 of the second openings 30, 40 is curved from the center 21 side in the longitudinal direction (X direction) of the first opening 20 toward both ends 22, 23 in the longitudinal direction (X direction), so that when the fingertip is inserted into the second openings 30, 40, the fingertip can smoothly touch the periphery E3 of the second openings 30, 40. This further reduces the discomfort of the fingertip touching the periphery E3 of the second openings 30, 40 and further reduces the burden on the fingertip (Figs. 1 to 5, 10).

In this embodiment, as described above, the cut C4 of the second tearing score line M2 formed on the portion 11A of the top surface 11 is wavy, and when the tearing score line M2 is torn, the wavy shape of the cut C4 remains on the periphery E3 of the second openings 30, 40. Therefore, in this embodiment, by tearing the second tearing score line M2 formed on the portion 11A of the top surface 11, the second openings 30, 40 with wavy periphery E3 can be formed on the portion 11A of the top surface 11 of the box body 10 (FIGS. 1 to 5, 10).

The second openings 30, 40 thus formed in the portion 11A of the top surface 11 can serve as a trigger for tearing the first tearing cut line M1 as described above. Specifically, by tearing the second tearing cut line M2, a fragment F is formed that is connected to the portion 11A of the top surface 11 via the base end R, and the second openings 30, 40 are formed by tilting the fragment F inward or outward from the box body 10. Then, by inserting the fingertips into the second openings 30, 40, the fingertips can be hooked on the portion 11A of the top surface 11. In addition, the fingertips inserted into the second openings 30, 40 are hooked on the base end R of the fragment F that will become the fold, further reducing the strain on the fingertips (FIG. 10).

In this embodiment, as described above, a fingertip can be inserted into the second openings 30, 40 formed on both ends 22, 23 of the first opening 20 in the part 11A of the top surface 11 in the longitudinal direction (X direction), and the inserted fingertip can be pulled upward over the part 11A of the top surface 11. This allows the first splitting cut line M1 to be split from both ends 22, 23 of the first opening 20 in the longitudinal direction (X direction) toward the center 21, making it easy to form the first opening 20 in the top surface 11 (Figures 1, 2, 6, and 7).

The present invention will now be described in more detail with reference to examples. The examples, comparative examples, and experimental examples were evaluated using the following tests.

[Sheet storage box (test specimen)]
A box 10 was produced using base paper (needle-coated cardboard) with a basis weight of 310 g/ ^m2 , with dimensions of about 44 mm in height, about 229 mm in width, and about 110 mm in depth. A first tearing score line M1 for forming a first opening 20 was formed on the top surface 11 of the box 10. The tearing score line M1 was composed of a first cut C1 arranged on the periphery E2 of the outlet 20 with a tie T1 in between, and a second cut C2 arranged on the outside of the periphery E2 in a staggered pattern with respect to the first cut C1. The size of the first opening 20 is such that the length L2 in the longitudinal direction (X direction) is about 177 mm in the entire length, about 29 mm in the central portion 21, about 17 mm in both ends 22, 23, and the width W2 in the transverse direction (Y direction) is about 35 mm in the central portion 21, about 35 mm in both ends 22, 23, and about 17 mm in the other smallest portions (see Figs. 1 and 2). A second splitting score line M2 for forming the second openings 30, 40 was formed in a portion 11A of the top surface 11 of the box body 10. The second openings 30, 40 have a shape of a half ellipse, and are provided in portions corresponding to both ends 22, 23 in the longitudinal direction (X direction) of the first opening 20 so that when the second splitting score line M2 is split, a fragment F connected to the portion 11A of the top surface 11 through the base end R is formed (see Figs. 1, 2, and 10).

[Sheet (tissue paper)]
The sheets S (sheet stack SL) were made of tissue paper (basis weight: 10.7 g/ ^m2 , paper thickness: 110 μm, number of plies: 2 plies, number of sets: 150 sets (300 sheets), dimensions: bulk (height) approx. 42 mm, vertical width approx. 197 mm, horizontal width approx. 207 mm) that was alternately folded and stacked so that it could be pulled out one set at a time in a pop-up style. The sheets S (sheet stack SL) were stored in the box 10 so that the stacking direction was the height direction (Z direction) of the sheet storage box 100 (see Figs. 1 and 12).

[Seat torn]
The sheet S was taken out of the sheet storage box (test specimen) five times to check for tearing of the sheet. The first five sheets of the sheet stack SL were taken out of the sheet S, and the sheet was pulled out from the outlet in a direction that formed an angle of 60 degrees with the top surface of the box. The evaluation was performed according to the following criteria, with ◎ or ◯ being good and × being bad.
◎: The sheet was torn once. ◯: The sheet was torn 2 to 3 times. ×: The sheet was torn 4 or more times.

The following describes examples, comparative examples, and experimental examples.

[Example 1]
The first cut C1 and the second cut C2 of the tearing score line M1 were arranged so that the angle θ1 between the third cut C3, which is formed when the tearing score line M1 is torn and connects one end V1 of the first cut C1 and one end V2 of the second cut C2, and the corner CO of the first cut C1 was an obtuse angle (see Figures 6 and 7). In addition, the first cut C1 of the tearing score line M1 was made into a wave (wave line) U, the period of the wave U was 0.5 mm, and the length of the tie T1 of the tearing score line M1 was 1.5 mm. The obtained test specimen was evaluated for sheet breakage. The results are shown in Table 1.

[Example 2]
Except for changing the length of the tie T1 to 1 mm, the evaluation was carried out in the same manner as in Example 1. The results are shown in Table 1.

[Example 3]
Except for the period of the waveform U being 1 mm (see FIG. 8), evaluation was performed in the same manner as in Example 2. The results are shown in Table 1.

[Example 4]
Except for changing the period of the waveform U to 2 mm (see FIG. 9), the evaluation was performed in the same manner as in Example 2. The results are shown in Table 1.

[Example 5]
Except for changing the period of the waveform U to 3 mm (see FIG. 9), the evaluation was performed in the same manner as in Example 2. The results are shown in Table 1.

[Comparative Example 1]
13 and 14, the first cut C1 and the second cut C2 of the splitting score line M1 were arranged so that the angle θ2 between the third cut C3, which is formed when the splitting score line M1 is split and connects one end V1 of the first cut C1 and one end V2 of the second cut C2, and the corner CA of the first cut C1 was an acute angle, and the first cut C1 of the splitting score line M1 was not made wavy (broken line). The evaluation was performed in the same manner as in Example 2. The results are shown in Table 1.

As can be seen from Table 1, the first cut C1 and the second cut C2 of the tearing score line M1 were arranged so that the angle θ1 between the first cut C1 and the third cut C3 was an obtuse angle, the first cut C1 of the tearing score line M1 was made into a waveform (wavy line) U, the period of the waveform U was 0.5 to 3 mm, and the length of the tie T1 of the tearing score line M1 was 1 to 1.5 mm. In this case, the sheet was less likely to tear in the sheet storage box (test specimen) (Examples 1 to 5).

On the other hand, in a sheet storage box in which the first cut C1 and the second cut C2 of the tearing score line M1 were positioned so that the angle θ2 between the first cut C1 and the third cut C3 was an acute angle, and the first cut C1 of the tearing score line M1 was not wavy (waved line), the sheets were easily torn when removed (Comparative Example 1).

From these results, it was found that a sheet storage box in which the tearing score line has multiple first cuts arranged at a given interval on the periphery of the outlet and multiple second cuts arranged in a staggered pattern around the first cuts on the outside of the periphery, and in which the angle between the first cut and a third cut that is formed when the tearing score line is torn and connects one end of the first cut to one end of the second cut is an obtuse angle, is less likely to tear the sheets during use.

Although the embodiment of the present invention has been described above, the present invention is not limited to a specific embodiment, and various modifications and variations are possible within the scope of the invention described in the claims.

100 Sheet Storage Box S Sheet (Tissue Paper)
SL: laminated sheet body 10: box body 11: top surface 11A: part E11, E12, E13, E14: edge E15: inner edge 12: bottom surface 13, 14: side surface 15, 16: end surface 20: first opening (take-out port)
E2 Periphery U Wave shape 21 Central portion 22, 23 End portion 30, 40 Second opening E3 Periphery B, B1, B2 Concave portion D, D1, D2 Convex portion L1, L2, L3 Length W1, W2, W3 Width P, P1, P2, P3 Period H, H1, H2, H3 Wave height M1 First cleavage score line M2 Second cleavage score line C1 First cut CE End portion C2 Second cut C3 Third cut C4 Cut T1, T2 Tie V1 One end of first cut V2 One end of second cut θ1, θ2 Angle Q, Q1, Q2, Q3 Length of second cut CO Corner portion R Base end F Fragment

Claims (5)

A box for accommodating a plurality of stacked sheets;
a tearing score line formed on a top surface of the box body, the tearing score line forming an outlet for the sheet on the top surface when the box body is torn;
The cleavage score line is
A plurality of first cuts are arranged at given intervals on a periphery of the outlet;
a second cut disposed outside the periphery in a staggered manner with respect to the first cut;
The splitting score line is formed so that an angle between the first cut and a third cut that is formed when the splitting score line is split and connects one end of the first cut and one end of the second cut is an obtuse angle ,
the first cut is corrugated;
A sheet storage box , wherein the period of the waveform is longer than the ties between adjacent first cuts . The sheet storage box according to claim 1, wherein the end of the first cut extends toward the second cut. The sheet storage box according to claim 1 or 2, wherein at least a portion of the first cut is curved toward the inside of the outlet. The sheet storage box according to claim 1 , wherein a period of the waveform is from 0.1 mm to 6 mm. The sheet storage box according to claim 1 , wherein a period of the waveform is at least twice the height of the waveform.

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