JP2001299632A - Toilet paper roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce the unwinding sound, to easily crush and abandon a thick cylindrical core, to inexpensively manufacture the thick cylindrical core, in its turn, to reduce the manufacturing cost of a toilet paper roll, to make the toilet paper roll have a flat elliptic shape as product, to reduce the storage and transport costs, and to sufficiently use the toilet paper roll in a cross-sectional almost circular shape at use time in the toilet paper roll having the thick cylindrical core installable in a thick shaft part of a toilet holder for a general home. SOLUTION: This toilet paper roll is composed of the thin paper-made thick cylindrical core 1 having a diameter of about 4 cm and toilet paper 2 almost softly wound up to the end from the beginning on the thick cylindrical core 1. The thick cylindrical core 1 is formed in a flat shape, and the toilet paper 2 is also formed in a flat elliptic shape so as to follow the thick cylindrical core of a flat shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet paper roll having a thick cylindrical core which can be mounted on a thick shaft portion of a general household toilet holder. It can be easily crushed and discarded, and the core of the thick cylinder can be manufactured at low cost, and the manufacturing cost of the toilet paper roll can be reduced. Further, the toilet paper roll has a flat elliptical shape and is commercialized. The present invention relates to a toilet paper roll that can be used at a low transportation cost and has a substantially circular cross section when used.

[0002]

2. Description of the Related Art In a conventional general toilet paper roll, a toilet paper and a paper tube core are separated from each other, and the core is formed of cardboard cardboard and has a diameter of about 3.8 cm. It is a cylinder of about 4.5 cm. On the other hand, in recent years, a so-called core rest illet paper roll having the above-mentioned toilet paper and a part of the roll around which the toilet paper is wound as a core has been researched and developed, and is now on the market.

[0003] There are two types of corerest illette paper rolls, one having a particularly small hole inside diameter at the center of the roll, and the other having a large hole inside diameter that can be attached to the thick shaft portion of a general household toilet paper roll holder. I have. In the type with a small inner diameter of the hole, since the shaft of the holder is also used with a small diameter, it cannot be used for the thick shaft of a toilet paper roll holder used in ordinary households. It was not suitable.

[0004]

Regardless of whether the inner diameter of the hole at the center of the corerest paper roll is small or large, each of the corerest illette paper rolls is wound almost hard from almost the beginning to the end, and the one wound softly is not wound. Did not exist. This is because in order to form a part of the center of the roll around which the toilet paper was rolled as a core, it was essential that the roll be stiffly wound from the beginning to the end (see Japanese Utility Model Publication No. 6-47356). For this reason, there has been a demand from the general market or users to develop a soft toilet paper roll that is softly wound with a coreless type.

[0005] As a soft-type core rest illette paper roll developed based on these demands and the like, the entirety is wound substantially softly, and the toilet paper on the roll center side at the beginning of the winding is adhered with an adhesive to form a cylinder. A core is formed. Although it is not specified as a soft type, the existence of a bonded tubular core is disclosed in Japanese Patent Application Laid-Open No. 7-2395. The tubular core portion was formed by bonding the portion of the toilet paper, which had been softly wound, with an adhesive, but none was formed in an orderly manner. When viewed from the outside, the shape of the hole is generally such that the hole is broken at the beginning of the very irregular winding, and it is difficult to fit into the market. It has been technically difficult to form the center of the roll at the beginning of the winding of such a soft-type corerest illette paper roll. Further, the manufacturing machine for manufacturing the soft core coret paper roll is a machine of special specification, and has a drawback that it is extremely expensive as a toilet paper roll product.

In recent years, as a demand for toilet paper rolls, women and the like have a tendency to extremely dislike the occurrence of a rattle or other unwinding sound when using the toilet paper rolls, and their development is also required. . That is, it is required to develop such that no unwinding sound is generated when the toilet paper roll is used, or the unwinding sound is extremely low.

[0007] In the case of commercially available toilet paper rolls, in particular, treatment of a paper core, which is a core at the center of the roll, after use has been regarded as a problem. That is, since the core is formed of cardboard made of cardboard, it cannot be easily crushed by women and children, and has a drawback that it is bulky when discarded as garbage. Furthermore, in public toilets, the paper core of the toilet paper roll is discarded in the toilet, which often causes clogging of the toilet, and the applicant has developed a coreless type in order to prevent the paper core. There is.

[0008] Toilet paper rolls that have been formed into a flat elliptical product have also been developed.
No.-25894), and since the core of the paper cylinder is formed of cardboard made of cardboard, it has a large force to process it into a flat shape. -21814, Tokuhei 6-84220). For this reason, there has been a disadvantage that the manufacturing unit price is expensive. further,
At the time of use, as shown in FIG. 23, the core of the cardboard made of cardboard does not become round, and an unusually loud noise is generated even when it is attached to the thick shaft of a general household toilet holder. There were inconveniences such as occurrence.

[0009]

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that the present invention provides a thin paper core having a diameter of about 4 cm and a thin paper core. It is made of toilet paper wound around the core from the beginning to the end substantially softly, the thick cylindrical core is formed in a flat shape, and the toilet paper is also flat elliptical so as to follow the flat thick cylindrical core. By using this as a toilet paper roll formed, it is attached to the thick shaft of a general household toilet holder and used.
The unwinding sound is significantly reduced, the thick tube core can be easily crushed and discarded, and the thick tube core can be manufactured inexpensively, and thus the toilet paper roll can be manufactured at a low price. The product has a flat elliptical shape, is inexpensive in storage and transportation costs, and has a substantially circular cross section when used.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. In the first embodiment, as shown in FIGS. 1 and 2, the toilet paper roll has a thin paper core 1 made of thin paper having a diameter of about 4 cm and externally wound around the thick core 1 from the beginning to the end. 1C, the thick cylindrical core 1 is formed in a flat shape, and the toilet paper 2 also has a flat ellipse so as to follow the flat thick cylindrical core 1 as shown in FIG. It is formed in a shape. That is, the finished product of the toilet paper roll is as shown in FIG. In addition, FIG.
Is a semi-finished product immediately after the toilet paper 2 is wound around the thick tube core 1. Further, when simply referred to as the thick cylindrical core 1, there are a circular one (see FIG. 1A) and a flat one (see a solid line in FIG. 1C). Further, when simply referred to as the toilet paper 2, it refers to an appropriate length including a roll state or a non-roll state. 1 (A) and 2 (A), the thickness of the thick cylindrical core 1 in the solid line is thicker than the thickness of the toilet paper 2, but is shown only as a line because it is made of thin paper. This is the same in the second and third embodiments. FIG. 1B particularly shows that the paper thickness of the thick cylindrical core 1 is larger than the paper thickness of the toilet paper 2. FIG. 2C is a partial schematic view of FIG. 2A, and shows that the entire height H ₀ (at no load) around which the toilet paper 2 is wound is almost softly wound. It is. That is, a gap is formed between the wound and laminated toilet papers 2.

The thick cylindrical core 1 is made of a thin paper having an inner diameter of about 4 cm inside and outside (actually, a diameter of about 3.8 cm to about 4.5 cm), and is usually about 30 g / m ² (1 m). It is manufactured by laminating a plurality of thin papers having a weight of paper per ² g) to about 100 (g / m ² ) and twisting them together with an adhesive.
In this way, it is not possible to measure only with normal paper weight,
The weight of one toilet paper roll (about 11 cm) in width and length (about 11 cm) of the thick cylindrical core 1 having an inner diameter of about 4 cm was measured. According to this, about 1 including the weight of glue etc.
(G / piece) to about 3 (g / piece). Examples of the material of the thin paper of the thick cylindrical core 1 include water-soluble non-size paper and water-soluble size paper. In addition, the toilet paper 2 is usually about 16 (g / m ² ) to about 23 (g / m ² )
No-size paper weighing no. The inside and outside diameters of about 4 cm include those having a diameter of about 3 cm to about 5 cm. The material of the thick cylindrical core 1 is generally different from the material of the toilet paper 2. Here, the thick cylindrical core 1 is made of thin paper, and is about 70 (g / m ² ) to about 100 (g / m ² ).
(G / m ² ) is not generally a concept of thin paper. In particular, in the present specification, cardboard as a material of a commercially available paper core, that is, cardboard, which is usually about 200 (g / m ² )
For a weight of about 220 g / m ^{2 to} about 220 g / m ² , the thick tube core 1 is usually made of high-quality paper or the like, and is usually about 30 g / m ^{2 to} 100 g / m ² .
Is made of thin paper.

The toilet paper roll is manufactured by the following two manufacturing methods. First, in the first manufacturing method, first, the winding shaft is inserted with the circular cylinder core 1, and in this state, the toilet paper 2 is wrapped almost softly from the beginning to the end, and the winding is completed. And roll of toilet paper roll semi-finished products (10 or more semi-finished toilet paper rolls with circular cross-sections in a row)
To manufacture. Next, the reel is extracted from the toilet paper roll semi-finished product assembly. Then, in the next step, the upper and lower cross sections of the toilet paper roll semi-finished product [FIG.
(A) See solid line] or press both sides to form the cross section of the thick cylindrical core 1 into a flat shape, and the toilet paper 2 also has a flat elliptical shape so as to follow the flat thick cylindrical core 1. [See the chain line in FIG. 2 (A)].

In order to make the entire cross section of the toilet paper roll into a flat elliptical shape, a pressure is applied, but the pressure can be processed even with a small amount. There is a case where a finished product as a toilet paper roll is manufactured into a flat elliptical shape by pressing from both sides with guides on both sides of the toilet paper.

In the second embodiment, as shown in FIG. 3, the toilet paper roll is made up of a thin paper core 1 made of thin paper having a diameter of about 4 cm, and The thick cylindrical core 1 is formed in a flat shape, and the toilet paper 2 is also formed in a flat elliptical shape so as to follow the flat thick cylindrical core 1. . The phrase “wound substantially softly as a whole” is equivalent to the aforementioned “wound substantially softly from the beginning to the end”. FIG. 3 (C) is a partial schematic view of FIG. 3 (A), and shows a hardly wound portion H at the entire height H ₀ (at no load) around which the toilet paper 2 is wound.
₂ illustrates a and part H ₃ which substantially wrapped soft. H ₂ + H ₃ = H ₀ . The solid line in FIG. 3 (A) is a semi-finished toilet paper roll, and the chain line is a completed toilet paper roll.

In the third embodiment, the toilet paper roll is made up of a thin paper core 1 made of thin paper having a diameter of about 4 cm.
Some of the windings except for the first part are wound around the thick cylindrical core 1 hardly and then substantially soft, and are wound substantially soft as a whole. The thick cylindrical core 1 is formed in a flat shape, and the toilet paper 2 is also formed in the flat thick shape. It is formed in a flat elliptical shape so as to follow the cylindrical core 1. Specifically, as shown in FIG. 4, the last few turns may be wound hard and all other positions may be wound almost soft. Even such a winding is "wound substantially soft as a whole", and is equivalent to the above-described "wound substantially soft from the beginning to the end". Although not shown,
Some rolls at the intermediate position of winding the toilet paper roll may be hardly wound, and all other positions may be wound almost softly. Even in this case, it is "wound substantially soft as a whole", which is equivalent to the above-mentioned "wound almost soft from the beginning to the end".
FIG. 4C is a partial schematic diagram of FIG.
At the entire height H ₀ (when no load is applied) around which the toilet paper 2 is wound, a portion H ₄ wound substantially softly
Illustrates a and part H ₅ where hard wrapped with.
The _{H 4 + H 5 = H 0} . Also, the solid line in FIG.
The toilet paper roll is a semi-finished product, and the chain line is the finished toilet paper roll.

[0016]

Example 1 In this specification, "approximately softly wound" means "toilet paper roll"
When the measuring weight 21 having a load of 13 kg is given, the rate of change in the load is about 36% or more. This was based on the experiment described later.

Load change rate = (H ₀ −H ₁ ) / H ₀ × 100 H ₀ : Height in the case of no load H ₁ : Height with load applied by 13 kg of measuring weight 21 In the experiment, FIG. As shown in (B), the measuring shaft 20 is inserted into the thick tube core 1 of the manufactured toilet paper roll of the product of the present invention or the paper tube core or the toilet paper roll core of a commercially available toilet paper roll. It is set so that the maximum upper position of the outer periphery of the thick tube core 1 or the like becomes the height 0, and this is set as the reference height position, and the height of the toilet paper roll with no load to the maximum top position of the outer periphery of the toilet paper 2 is set. is, namely, the height of the case of no load was H _0. In addition, a measuring weight 21 having a weight of 13 kg is placed on the unloaded toilet paper roll. At this time, the gap between the toilet papers 2 is narrowed by the measuring weight 21 and the height is reduced. The height to the maximum top position of the outer circumference of the toilet paper 2 at the time,
That is, the height of the case of adding a 13kg load was H _1.

In the experiment, as the measurement data of the rate of change of load,
A product of the present invention (see FIG. 11) and a cored soft winding A wound slightly softer with a center winding selected as appropriate as a feel
(See FIG. 12) and a cored soft winding B (see FIG. 13);
In a cored ordinary winding of surface hardness of normal hardness (see FIG. 14), a cored hard winding slightly wound (see FIG. 15), and a hard wound coreless hard winding (see FIG. 16), H ₀ and H ₁ of the sample were measured. The measured data is shown in FIGS. 11 to 16, and only the maximum load change rate, the average change rate, and the minimum change rate are collected and tabulated in FIG.
(A). When this is made into a comparative graph as shown in FIG. 10C, the following is obtained.

That is, “hardly wound” means
The load change rate of 0% to about 9%, "wound slightly hard" means that the load change rate is about 9% to about 21%, and "wound to normal hardness" means that the load is A rate of change of about 21% to about 36%, "wound slightly soft" means that the load change rate is about 36% to about 49%, and a "softly wound" means that the load change rate is about 49%. % Or more. As described above, “substantially wound” includes “softly wound” and “slightly wound”, and thus “substantially wound” as described above at 13 kg load This means that the load change rate is about 36% or more. This value may fluctuate by about 10% depending on temperature, humidity, pressure and the like under the condition where the toilet paper roll is placed.

(H ₀ −H ₁ ) according to the above equation is
It also represents the amount of void between the laminated toilet paper 2 and 2 in the toilet paper roll,
It can be said that the load change rate according to the above equation is substantially equivalent to the porosity. Therefore, when the porosity is about 36% or more,
It can be said that it was "wrapped almost softly". It should be noted here that the load is 13 kg in the table. For example, in the case of an 18 kg measuring weight 21, the value of (H ₀ −H ₁ ) is large, so that the load change rate is large in any case, and about 40% or more of the load change rate is “substantially softly wound”. For example, in the case of the measuring weight 21 with a load of 7 kg, the value of (H ₀ −H ₁ ) is small. 30% or more is "substantially softly wound".

[0021]

[Embodiment 2] In the experiment of measuring the unwinding sound of the toilet paper roll of the product of the present invention shown in FIG. 17, the toilet paper roll of the product of the present invention has a conventional ordinary cardboard core. It is clear that it is much quieter than the toilet paper roll. In a specific experiment, the thick cylindrical core 1 relating to the product of the present invention was made of thin paper having an inner diameter of about 3.8 cm, and the weight per toilet paper roll length (about 11 cm) was: About 1.
6 (g / piece), which is formed by suitably twisting and overlapping two thin paper sheets weighing about 50 (g / m ² ). As the material of the thin paper of the thick cylindrical core 1, a water-soluble non-sized paper was used. As a conventional product, the inner diameter is about 3.
A so-called cored ordinary roll toilet paper roll was used in which the hardness was normally wound around an 8 cm cardboard paper core. The outer diameter of both the toilet paper roll of the present invention manufactured by the "softly wrapped" toilet paper 2 and the conventional cored ordinary wound toilet paper roll is about 110 mm in both cases. The toilet paper roll holder is attached to the thick shaft portion 10 of the one-touch type toilet paper roll holder, and the lid of the toilet paper roll holder is removed to eliminate the contact sound between the lid and the toilet paper, and the winding generated when the toilet paper is pulled out. The return sound was measured. About 50cm, 1m, from the toilet paper roll holder
A sound collecting sensor was installed at a position of 1.5 m for measurement. At this time, even if the speed at which the toilet paper is rewound is constant, the toilet paper roll is rewound from the outer peripheral side. Since the speed gradually increased, three measurements were performed at the outer peripheral portion, the intermediate portion, and the central portion (on the side of the thick cylinder core).

As shown in the table of FIG. 17, 12d at any position of the outer peripheral portion, the intermediate portion, and the central portion (on the side of the thick cylinder core).
B (decibel) to 17 dB also became quiet. In particular, in toilets, etc., it is usually 1 m or more away from others, and when these are averaged, the conventional cored ordinary winding is about 65 dB, and the product of the present invention is about 53 dB. there were. Even if only 12 dB is smaller, dB is the logarithm of the loudness of a sound, and a difference of 10 dB is a tenfold difference in loudness of a sound. That is, the difference of 12 dB is about 16 times when the sound volume is large, and about 2 times at 13 dB.
0 times, about 25 times at 14 dB, about 32 times at 15 dB,
There is a remarkable difference of about 40 times at 16 dB and about 50 times at 17 dB. FIG. 18 is a graph of the table of FIG. 17, and the difference in the unwinding sound of the toilet paper roll between the conventional product and the product of the present invention is obvious. Further, FIG.
Referring to a comparison table of noise level and familiar sound as shown in FIG. 9, about 65 dB is an intermediate position between ordinary conversation and noisy office or telephone sounds. Is a sound close to a quiet office, and the difference in the loudness is extremely remarkable considering only the loudness of the sound.
For this reason, if the product of the present invention is used, the unwinding sound of the toilet paper roll becomes extremely small, and even women can use it with ease and ease.

[0023]

[Embodiment 3] Fig. 20 is a diagram showing a compressive load displacement diagram of a paper tube (paper tube core, thick tube core 1 of the present invention, etc.) of a toilet paper roll. The inner diameter of the thick cylindrical core 1 according to the present invention is about 3.8.
cm, the length of one toilet paper roll (about 11 cm) weighs 1.0 (g / piece), and 1.
6 (g / piece), 2.0 (g / piece), 2.4 (g / piece),
3.0 (g / piece) was used. In addition, the conventional paper core made of cardboard uses 5.9 (g / piece) and 6.4 (g / piece). Paper was used. As described above, 1.0 (g / piece), 1.6
(G / piece), 2.0 (g / piece), 2.4 (g / piece),
3.0 (g / piece) is about 30 (g / m ² ) and about 5 (g / m ² ), respectively.
0 (g / m ² ), about 65 (g / m ² ), about 80 (g / m ² ),
^Two thin paper sheets weighing about 100 (g / m ² ) are appropriately twisted and overlapped. Furthermore, 5.9 (g /
Book) and 6.4 (g / book) are about 200 (g / book), respectively.
m ² ) and ^two thick paper sheets weighing about 220 (g / m ² ) are appropriately twisted and overlapped. In this experiment, a paper tube compression load displacement diagram of the toilet paper roll when a height of 0 to 15 mm is deformed by applying a load to the thick tube core 1 or the paper tube core having an inner diameter of about 3.8 cm. .

As a result, as shown in the table of FIG.
In the case of 0 (g / piece) thick cylinder core 1 of the product of the present invention, 6.4
(G / piece) compared to a conventional cardboard core
It can be pressed with a pressure (N) of about 1/0. As described above, it is possible to easily crush the thick tube core 1 with an extremely small force as compared with a conventional cardboard core (see FIG. 9). Further, from FIG. 20, about 3 (g / piece)
High quality paper is considered to be a category of the thin paper core 1 of the present invention. The weight of the thick core 1 varies from about 10 to 20% depending on the amount of glue, and about 4 (g / piece) high quality paper is also included in the thin paper core 1 of the present invention. Sometimes.

[0025]

[Embodiment 4] Fig. 24 is a diagram showing a displacement diagram of a compressive load of a toilet paper roll. The thick cylindrical core 1 of the embodiment of the present invention has an inner diameter of about 3.8 cm, and the weight per one toilet paper roll (about 11 cm) is 1.6.
(G / piece), a soft roll having an outer diameter of about 11 cm was used. As a commercially available product a, a cardboard core having a weight of 6.4 (g / piece) is used.
A cored ordinary roll with an outer diameter of about 11 cm, and as a commercial product b, a cardboard core with a weight of 5.9 (g / piece), a cored soft roll with an outer diameter of The one of about 11 cm is used.

In the experiment, the displacement state was measured while applying a compressive load. In this specification, 1 kgf is assumed to be 10 N (Newton) although there is an error of about 2%. Then, as shown in FIG. 24, when a compressive load was gradually applied to the circular commercial product a, about 5 N was applied and the displacement was about 8 mm, and about 10 N was displaced about 14 mm. Furthermore, it is deformed by about 15 mm at the maximum compressive load of about 10.5 N [see the state of FIG. 27 (B)]. 9.
At 5N, the core of the paper cylinder became flat at a position of about 50 mm displacement, and the toilet paper was formed in a flat elliptical shape [see the state of FIG. 27C]. In the case of a circular commercial product b, about 6N is added and 20 mm is displaced, and about 10.2N
Was displaced by 30 mm. Furthermore, it deformed 32 mm at the time of the maximum compressive load of about 10.5 N [see the state of FIG. 27 (B)],
Thereafter, even if a compressive load that does not increase more than the maximum compressive load is applied, the displacement increases, and the core of the paper cylinder becomes flat at a point of about 9.9 N and about 60 mm displacement, and the toilet paper is formed into a flat elliptical shape. [Refer to the state of FIG. 27 (C)].
By the way, the point where the amount of displacement increases without increasing the tensile load in the tensile test is defined as "yield point" in JIS terms. In particular, in the embodiment of the present invention, although it is a compression displacement test, since the displacement increases without increasing the compression load from the point of the maximum compression load, the maximum compression load point is referred to as “compression” in this specification. It is referred to as the "yield point." When circular height of commercial products a and b before the deformation in the compressive displacement test and Y _0, the height became flattened elliptical shape is compressed has a Y ₂ (see FIG. 27).

In the embodiment of the present invention, as shown in FIG.
Approximately 1N for semi-finished toilet paper roll
Was added, the displacement was 18 mm, and the displacement was 30 mm at 2N. Furthermore, when the maximum compressive load is about 4N, the displacement is about 42mm.
At this point, the thick cylindrical core 1 is flattened, and the toilet papers 2, 2,... Are formed in a flat elliptical shape. If this in the compression displacement test circular height of the present invention embodiment sample prior to deformation and Y _0, the height became flattened elliptical shape is compressed Y _1, and the not compressed than the Y _2, height Y ₁ > height Y ₂ (see FIGS. 25 and 27). Further, in the product of the present invention, there is no compression yield point. In particular, the displacement amount of the commercially available products a and b is large as a whole from FIG. 27 (B) to FIG. 27 (C), that is, because the cardboard core is hard in the compression process, When the cylinder core is pressed flat, a large force is required at the diamond-shaped ellipse, and by this time, the upper and lower laminated toilet papers 2, 2,. And compress it [see FIG. 27 (B)]. The maximum value at this time is called a predetermined value, and the predetermined value location is called a compression yield point K (see FIG. 24). From the compression yield point K, the amount of displacement increases for the toilet paper roll semi-finished product without increasing the pressing force, which is a compression load of a predetermined value or more (in the graph of FIG. 24, about 10 N, about 1.05 kgf). I do. At this time, the core of the paper cylinder has a flat shape, and the toilet paper has a flattened elliptical shape with a further increased flatness.

As shown in FIG. 26, the thin tubular core 1 made of thin paper is made flat and the toilet paper 2,
Are formed into a flat elliptical shape, the repulsive force f, f,... For returning to the circular old position is small because the pressing force (compression load) is small, and the packaging sealed in the bag body 50 is also difficult. Can be simplified. In the embodiment of the present invention, toilet paper 2,
Since the pressing force is only about 4N at the time of forming the flattened ellipses 2,..., It is possible to sufficiently cope with the pressing force during the packaging process. Further, the production can be simplified even at about 5N.

[0029]

The product of the present invention as described above is mounted on the thick shaft portion 10 of the toilet paper roll holder and used. The above-mentioned “wound substantially softly from the beginning to the end” or “wound substantially softly as a whole” means that the gap between the laminated toilet papers 2 in the toilet paper roll has increased. When the amount of voids increases in this way, when the toilet paper attached to the thick shaft portion 10 of the toilet paper roll holder is pulled out, the toilet paper roll rotates, and in particular, the thick cylindrical core 1 and the toilet paper roll holder Even when the thick shaft portion 10 abuts irregularly and the sound of rewinding the toilet paper roll is generated, the thick cylindrical core 1
On the outer circumference of the toilet paper, there is a toilet paper 2 "wound substantially softly from the beginning to the end" or "wound substantially softly as a whole", and the sound is transmitted outward by the gap between the stacked toilet papers. In this case, the sound is muted or reduced (see FIG. 6 (A) and FIG. 6 (B)).

Furthermore, the toilet paper 2 in which the thick tube core 1 is made of thin paper and which is "wound substantially softly from the beginning to the end" or "whole softly wound as a whole" exists. Therefore, when the toilet paper 2 is rewound (pulled), one portion of the thick core of the toilet paper roll becomes elliptical [FIG. 6 (A)].
As shown in FIG. 7 (A), as shown in FIG. 7 (A), the shaft side point Pc ₂ and the tube side point Po ₂ where the thick shaft portion 10 and the thick cylinder core 1 are in close contact with each other at present.
Contact with the axial side point Pc ₁ not, there is a cylindrical side point Po _1, the next moment, the shaft-side point Pc _2, while in contact with the cylindrical side point Po _2, shaft side point Pc _1, tube side becomes a point Po ₁ both contact, contact a surface when the rotating state. As described above, no sound is produced or extremely low sound is generated when the surfaces come into contact with each other because of their softness.
However, as shown in FIG. 8, in the conventional toilet paper roll cardboard tube core a, the thick shaft portion 1 is currently used.
If there is an axis side point Pc and a cylinder side point Po of a point that is in contact with 0 and a point that is not yet in contact, at the next moment, the axis side point Pc and the cylinder side point Po contact each other. However, the points that have been in contact with each other are separated from each other, and are in point contact in the rotating state, and a loud unwinding sound of the toilet paper roll is generated under this point contact state. The product of the present invention has solved such a disadvantage by the action by the surface contact shown in FIG.

As described above, in the product of the present invention, the unwinding sound of the toilet paper roll can be significantly reduced only because the increase in the amount of void between the toilet papers 2 and 2 and the soft surface contact. This is because they act synergistically.

Further, according to the present invention, even if the thick cylindrical core 1 is flat, the thick shaft portion 1 of the toilet paper roll holder can be used.
When attached to 0, it can be returned to a substantially perfect circular shape. This is due to the thin cylindrical core 1 made of thin paper and the toilet paper "wound substantially soft from the beginning to the end" or "whole softly wound as a whole". Due to the fact that almost no pressure is applied and the synergistic action of the soft toilet paper 2, as shown in FIGS.
It can be returned to a substantially perfect circle.

FIG. 21A shows a toilet paper roll of the present invention in which six toilet paper rolls are sealed in one carton. FIG. 21B shows toilet paper in a cross section of the carton. It shows the inserted state of the roll. In particular, comparing the carton of the conventional type toilet paper roll of FIGS. 22A and 22B with the carton of the toilet paper roll of the present invention of FIG.
Experiments show that the product of the present invention has a cross-sectional area reduced by about 30 to 40% compared to the conventional product.

[0034]

According to the first aspect of the present invention, the diameter is about 4 cm.
A thick tube core 1 made of inner and outer thin paper, and a toilet paper 2 wound around the thick tube core 1 almost softly from the beginning to the end, wherein the thick tube core 1 is formed in a flat shape, and the toilet paper 2 By making the toilet paper roll formed in a flat elliptical shape so as to follow the flat thick cylindrical core, by attaching this to the thick shaft portion 10 of a general household toilet holder, First
Secondly, the rewind sound can be significantly reduced, and secondly, storage and transportation costs, etc. are inexpensive, and at the time of use, the cross-section is substantially circular, so that it can be used sufficiently. Fourth, the thick cylindrical core 1 can be manufactured at a low cost, and thus the manufacturing price of the toilet paper roll can be reduced. Fifth, the product value is much higher than that of the toilet paper roll in which the entire cylindrical core is softly wound. And the like.

Of these effects, in particular, the effect that can significantly reduce the rewind sound will be described in detail. The toilet paper roll of the present invention is mounted on the thick shaft portion 10 of a toilet paper roll holder of a general household or the like, and the thick shaft portion 10 and the thick cylindrical core 1 come into contact with each other while rotating, and the contact sound and the rubbing sound therefrom. Even if such a situation occurs, the thick cylindrical core 1 is made of thin paper, so that it rotates so as to fit and comes into surface contact, and the outer periphery of the thick cylindrical core 1 has a toilet paper 2 that is "substantially softly wound". Exists, the sound is muted or reduced without being transmitted to the outside due to the presence of the gap between the laminated toilet papers 2 and 2. This is clearly demonstrated in the experiments of FIGS. About 12 in this experiment
Although there is a reduction in the rewind sound from dB to about 17 dB, in practice, almost no sound can be heard. by this,
In particular, it is possible to eliminate the unwinding sound of rattle or the like during use of toilet paper in a toilet, and there is the greatest advantage that a woman or the like can provide a silent-type toilet paper roll that can be used with peace of mind.

Further, according to the present invention, even if the thick cylindrical core 1 is flat, the thick shaft portion 1 of the toilet paper roll holder can be used.
When it is attached to 0, since the thick cylindrical core 1 is made of thin paper, almost no pressure is applied even when it is flat, and it returns to a substantially perfect circular shape by synergistic action with the soft toilet paper 2. Can be enough for use. Furthermore, if the toilet paper roll is flat elliptical,
Compared with the conventional round toilet paper roll, there is an advantage that the space can be greatly reduced and the storage and transportation costs can be reduced.

Further, since the thick core 1 is made of thin paper,
Unlike conventional cardboard paper cores, the strength is extremely low, so even women and children remain in the thick shaft portion 10 of the toilet paper roll holder of a general household after using the toilet paper roll. The thick cylindrical core 1 can be easily crushed (see FIG. 9) to reduce household waste and to be disposed of as general waste.

Further, since the core 1 is made of thin paper, the thickness of the core is smaller and the amount of paper is smaller than that of the conventional core made of cardboard. it can.
This has the advantage that the toilet paper roll as a whole can be reduced in price.

[0039] Although soft type corerest illustrator paper rolls exist in some markets, the glued cylindrical core has a damaged appearance and is difficult to penetrate by ordinary people. Or, the manufacturing machine for manufacturing the soft type corerest illette paper roll is a special machine of special specification, and has a drawback that it is extremely expensive as a toilet paper roll product. The shape is substantially the same as that of the paper core, so that the product value can be remarkably improved, and as described above, not only the noise reduction effect and the good measure against dust but also the effect of reducing the unit price of the product can be achieved.

According to the second aspect of the present invention, the thin paper core 1 made of thin paper having a diameter of about 4 cm is wound around the thick core 1 with the first few turns being hard and then almost soft until the end. And the toilet paper 2 is formed in a flat elliptical shape so that the toilet paper 2 follows the flat thick cylindrical core 1. By using the toilet paper roll, the same effect as that of claim 1 can be obtained. In the invention of claim 2, in particular, even though the first few turns are hard on the thick cylindrical core 1 and then are almost softly wound to the end, the whole is wound almost softly from the beginning of claim 1. This is because the configuration is equivalent to that of being wound almost soft to the end, and an equivalent effect is achieved.

Further, according to the third aspect of the present invention, the diameter is about 4 cm.
A thick paper core 1 made of inner and outer thin papers; and a toilet paper 2 wound around the thick paper core 1 with a few turns except for the first part being hard and then almost soft and generally softly as a whole. The toilet paper roll 1 is formed in a flat shape, and the toilet paper 2 is also formed as a toilet paper roll formed in a flat elliptical shape so as to follow the flat thick cylindrical core. It works. In the invention of claim 3 as well, in particular, the fact that a few turns except the first are hardly wound around the thick cylindrical core 1 and then wound substantially softly is equivalent to the substantially soft wound from the beginning to the end of claim 1. With the configuration described above, the same effect can be obtained.

According to the fourth aspect of the present invention, the first, second or third aspect is provided.
In the above, when the toilet paper is formed into a flat elliptical shape, the amount of displacement increases without increasing the pressing force any more when a predetermined load is applied to the toilet paper roll semi-finished product. By providing a toilet paper roll that has no yield point K and is formed only by an increase in displacement with respect to a pressing force that gradually increases below half of the predetermined compressive load, a compressive load of a predetermined value is obtained. The semi-finished toilet paper roll can be neatly formed into a flat elliptical shape with a small pressing force of not more than half. In particular, since there is no compression yield point K at which the displacement increases even when no more pressing force is applied when the compression load reaches a predetermined value, a large flat elliptical molding machine is not required, and There is also an advantage that the flat elliptical toilet paper roll packaging can be easily performed by a simple device or the like since the force for returning to the circular shape is small. However, when there is a core made of cardboard as in the commercially available products a and b shown in FIGS. 24 and 27, the compression yield point K having a predetermined value with a large compression load is present. It takes a lot of power to do
Thus, the present invention has solved the conventional disadvantage that the repulsive force for returning from an elliptical shape to a circular shape when the bag is put into a bag or the like becomes large and a large enclosing device must be used.

[Brief description of the drawings]

FIG. 1A is a perspective view of a semi-finished toilet paper roll according to a first embodiment of the present invention. FIG. 1B is a partially enlarged perspective view of FIG. 1A, and FIG. 1C is a toilet according to a first embodiment of the present invention. Perspective view of finished paper roll and imaginary line drawing of semi-finished product

FIG. 2A is a side view of a toilet paper roll semi-finished product according to the first embodiment of the present invention and an imaginary diagram of a finished product. FIG. 2B is a partially enlarged view of FIG. Partial schematic diagram of

3A is a side view of a toilet paper roll semi-finished product according to a second embodiment of the present invention, and an imaginary diagram of a finished product. FIG. 3B is a partially enlarged view of FIG. Partial schematic diagram of

FIG. 4A is a side view of a toilet paper roll semi-finished product according to a third embodiment of the present invention and an imaginary diagram of a finished product. FIG. 4B is a partially enlarged view of FIG. Partial schematic diagram of

5 (A) to 5 (D) are views showing a state in which the present invention is restored to its original circular shape and is attached to a thick shaft portion of a toilet paper roll holder.

FIG. 6A is a state diagram of rewinding the present invention. FIG. 6B is an enlarged sectional view of (A) of FIG.

7 (A) and (B) are views showing the state of the center of the toilet paper roll in the process of rewinding the present invention.

8 (A) and 8 (B) are views showing the state of the center of the toilet paper roll in the process of rewinding the conventional product.

FIG. 9A is a state diagram of a process of crushing a normal thick tube core of the present invention. FIG. 9B is another state diagram of crushing the thick tube core of the present invention. Still another state diagram crushed

FIG. 10 (A) is a table of load change rates by winding type (B) is a schematic diagram of a measuring method for measuring the load change rate (C) is a comparison graph of load change rates by winding type

FIG. 11 is a table of measured data of the rate of change of load of the product of the present invention.

FIG. 12 is a measurement data table of a rate of change in load of a slightly soft toilet paper roll.

FIG. 13 is a measurement data table of a rate of change in load of another slightly softer toilet paper roll.

FIG. 14 is a table showing measurement data of the rate of change in load of a toilet paper roll of normal hardness.

FIG. 15 is a measurement data table of a rate of change in load of a slightly hard toilet paper roll.

FIG. 16 is a measurement data table of a rate of change in load of a hard toilet paper roll.

FIG. 17 is a comparison table of measurement of unwinding sound of toilet paper roll.

FIG. 18 is a graph comparing the measurement of the unwinding sound of the toilet paper roll.

FIG. 19 is a comparison table of noise levels and familiar sounds

FIG. 20 is a diagram showing a compressive load displacement diagram of a paper tube of a toilet paper roll comparing a product according to the present invention with a conventional product.

21A is a perspective view of a packaged toilet paper roll carton of 6 pieces according to the present invention, and FIG. 21B is a cross-sectional view of FIG.

FIG. 22 (A) is a perspective view of a conventional packaged toilet paper roll carton containing 6 pieces (B) is a cross-sectional view of (A).

FIGS. 23A to 23D are diagrams showing a state in which a conventional flat toilet paper roll is restored.

FIG. 24 is a diagram showing a compressive load displacement diagram when a toilet paper roll is manufactured, comparing a product according to the present invention with a conventional product.

FIG. 25 is a state diagram showing an experiment of compressive load displacement when manufacturing a toilet paper roll of the product of the present invention.

FIG. 26 (A) is a state diagram in which a single product of the present invention is packaged. FIG. 26 (B) is a state diagram in which a product of the present invention is packaged in parallel.

FIG. 27 (A) is a diagram showing a state in which an experiment of compressive load displacement is started at the time of manufacturing a conventional toilet paper roll, and FIG. 27 (B) is a diagram showing a state of a compression yield point during the experiment of FIG. Is the state diagram of the final stage of the experiment (A)

[Explanation of symbols]

 1: thick core 2: toilet paper K: compression yield point

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[Procedure amendment]

[Submission date] July 4, 2001 (2001.7.4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

In recent years, as a demand for toilet paper rolls, women and the like have a tendency to extremely dislike the occurrence of a rattle or other unwinding sound when using the toilet paper rolls, and their development is also required. . That is, there is a need to develop a toilet paper roll so that it does not generate a rewinding sound when used or has an extremely low rewinding sound.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

As another manufacturing method, the entire cross section of the toilet paper roll is formed into a flat elliptical shape.
Although pressure is applied, this pressure can be processed even if it is slight, so when performing with a toilet paper roll semi-finished product,
There is a case where a finished product as a toilet paper roll is manufactured in a flat elliptical shape by pressing from both sides with guides on both sides in a packaging process.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

[0039] Although soft type corerest illustrator paper rolls exist in some markets, the glued cylindrical core has a damaged appearance and is difficult to penetrate by ordinary people. Or, the manufacturing machine for manufacturing the soft type corerest illette paper roll is a special machine of special specification, and has a drawback that it is extremely expensive as a toilet paper roll product. It has substantially the same shape as the paper core, and its product value can be significantly improved, and as described above, it has the effect of reducing or reducing the rewinding sound, and can not only improve the measures against dust. This has the effect of reducing the unit price of the product.

Claims (4)

[Claims] 1. A thick tube core made of thin paper having a diameter of about 4 cm, and a toilet paper wound around the thick tube core from the beginning to the end softly, wherein the thick tube core is formed in a flat shape, and The toilet paper roll, wherein the toilet paper is also formed in a flat elliptical shape so as to follow the flat cylindrical core. 2. A thin paper core having a diameter of about 4 cm and a thin paper core, the first few turns being hard on the thick core, and thereafter substantially soft until the end.
The whole is made of toilet paper wound substantially softly, the thick cylindrical core is formed in a flat shape, and the toilet paper is also formed in a flat elliptical shape so as to follow the flat thick cylindrical core. A toilet paper roll characterized by becoming. 3. A thick paper core made of thin paper having a diameter of about 4 cm, and toilet paper wound around the thick core with a few turns except for the first part being hard and then almost soft, and as a whole almost soft. The toilet paper roll, wherein the thick cylindrical core is formed in a flat shape, and the toilet paper is also formed in a flat elliptical shape so as to follow the flat large cylindrical core. 4. The toilet paper roll according to claim 1, wherein when the toilet paper is formed in a flat elliptical shape, when a predetermined load is applied to the toilet paper roll semi-finished product, a further load is applied. A compression yield point at which the displacement increases without increasing the pressure does not exist, and the displacement is increased only with respect to the pressure gradually increasing at less than half of the predetermined value of the compression load. Characterized toilet paper roll.