JP2001065161A - Tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tatami mat which is thin, lightweight, has adequate compressive strength and flexural rigidity, can be produced at a low cost and generates free electron acting to the human body. SOLUTION: A tatami mat has a plate-shaped conductive layer 3 through which free electrons from an electrostatic high voltage generator 2 move, at the one surface side of this conductive layer 3, a surface covering layer 4 having a tatami facing 6 with woven imitation rushes made of a synthetic resin is jointed. Also at the other surface side of the conductive layer 3, a rear covering layer 5 is jointed which is covering the other surface side, giving elasticity to the tatami and preventing the warping of the tatami mat. Free electrons as negative electric charge move to the conductive layer 3 from the electrostatic high voltage generator 2; when a person is on the top of the tatami facing 6 in a state where the free electrons are uniformly distributed on the conductive layer 3, the free electrons act to the inside of the body of the person; and the free electrons act inside the body, minus ions are generated and the health can be accelerated by the work of the minus ions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami structure that can be used by laying it on, for example, a floor of a flooring.

[0002]

2. Description of the Related Art Japanese people prefer the feel or atmosphere of tatami mats, and this tendency is particularly remarkable for elderly people. For example, in nursing homes called nursing homes, tatami mats are laid on the floor of the lounge, and people sit on the tatami mats to enjoy tea and chat. In a kindergarten, a tatami mat may be laid on the floor of a classroom during a game. Thus, the use of tatami mats is now widespread.

In a conventional tatami mat, a tatami mat made of natural rush is placed on the surface of a tatami mat made by stacking and compressing rice straw, and both ends are covered with a tatami rim made of cloth. It is formed by sewing with the edge. Such tatami mats include Honma (width 95.5 x height 191.0 x thickness 5.
5cm), between 36 (Kyokuroku) (width 91.0 x height 1)
Various types of tatami mats having different dimensions, such as 82.0 × 5.5 cm in thickness, and between eight and eight (gochi) (88.0 in width × 176.0 in height × 5.5 cm in thickness) are well known.

[0004] On the other hand, many health tools have been proposed in which negative ions act on the body to promote health. For example, in the health tool for abdominal band disclosed in Japanese Utility Model Application Laid-Open No. 6-19748, the generated negative ions are converted to a belly. It is configured so that it can be directly applied to and treated. Further, the futon disclosed in Japanese Patent Application Laid-Open No. 5-184441 is configured such that harmful positive ions in the air are electrically neutralized by generated negative ions to promote sleep. Also,
The bed apparatus disclosed in Japanese Patent Application Laid-Open No. H11-57032 is configured to take in the generated negative ions into the body during breathing to promote health.

[0005]

When the tatami mats made of rice straw described above are laid on the floor of the flooring, a step of 5.5 cm is generated between the floor of the flooring and the tatami mats. Laying these tatami mats in a kindergarten classroom can cause the children to stumble on these steps when running around and playing, and when running and jumping from the floor onto the tatami mats, the tatami mats may slide on the floor. There is. In addition, in a nursing home, an elderly person moving in a wheelchair stays in the wheelchair.
It is difficult to pass over a step of 5 cm, and even if the user moves on the tatami mat from the floor, there is a problem that the tatami mat is greatly dented because each wheel of the wheelchair locally presses the tatami mat.

Further, since the tatami floor is made of rice straw, the tatami floor has a high water absorption, and when drinking water such as tea or coffee is spilled on the tatami floor, the tatami floor immediately penetrates to the tatami floor. As a result, only the moisture attached to the surface of the tatami can be wiped off, and it is extremely difficult to completely remove the moisture that has penetrated to the inside of the tatami. If the tatami floor is left moist as described above, mold and mites will be generated on the tatami floor,
At last, the tatami floor may rot. In addition, since this tatami mat does not have excellent thermal conductivity, even if the tatami mat is laid on the floor heated by the floor heating equipment, the heat from the floor is not transferred well to the tatami mats, and Heat is wasted. Also, since the tatami mats are very heavy, they require a great deal of labor to carry. Further, since the tatami mats are produced manually by a tatami craftsman, the manufacturing time is long, the production efficiency is low, and the tatami mats are expensive.

[0007] As described above, the conventional tatami mat has the problems that the thickness and weight are large, the heat conductivity is low, the productivity and the economic efficiency are low, and the above-mentioned actual tatami mats have a problem.
A health promotion effect by negative ions as in the health tool for belly band disclosed in JP-A-19748, the futon disclosed in JP-A-5-184441, and the bed apparatus disclosed in JP-A-11-57032. There is a problem that they cannot be obtained, and a tatami mat that can solve these problems is desired.

[0008] An object of the present invention is to provide a tatami mat which is thin and lightweight, and which can obtain a health promoting effect on the body.

[0009]

According to the first aspect of the present invention, there is provided a plate-shaped conductive layer to which an electrostatic voltage is applied, a surface coating layer provided on one surface of the conductive layer and having a mat surface, A back cover layer provided on the other surface of the layer and covering the other surface.

The tatami mat of the present invention has a plate-shaped conductive layer to which an electrostatic voltage is applied from an electrostatic high-voltage generator, and a surface coating layer having a tatami mat surface is provided on one surface of the conductive layer. In addition, on the other surface of the conductive layer, a back surface coating layer that covers the other surface, gives elasticity to the tatami mats, and prevents warp of the tatami mats is provided. When a negative high static voltage is applied to the conductive layer from the electrostatic high voltage generator, the surface coating layer is negatively charged. In this state, when a person rides on the tatami surface, free electrons act on the body from the contact point between the body and the tatami surface, for example, the sole of the foot, from the surface coating layer. Ions are generated, and the action of the negative ions can promote health.

Also, by appropriately selecting the material of the back cover layer of the tatami mat configured as described above, various properties such as hardness and elasticity similar to those of the conventional tatami mat using rice straw can be achieved. In addition, the thickness can be reduced. Even if this tatami is laid on the floor of the floor, the step between the tatami and the floor of the floor is small. This reduces the possibility that the child will trip over a step and fall, and since this tatami is thin but has a moderate compressive strength, even if the tatami gets on the tatami from the floor in a wheelchair, the tatami may dent Absent. Also, since it is lightweight, it can be easily transported by elderly people and children.

According to a second aspect of the present invention, in the configuration of the first aspect, connection means for electrically connecting the conductive layers of the plurality of tatami mats to each other is provided.

According to the present invention, when a plurality of tatami mats are laid on the floor of the flooring, the respective conductive layers of the adjacent tatami mats are electrically connected by the connecting means. When the conductive layer of the tatami mat is connected to one electrostatic high-voltage generator, and an electrostatic voltage is applied from the electrostatic high-voltage generator to the conductive layer of the one tatami mat, the electrostatic high-voltage generator is connected. Free electrons can be transferred from the conductive layer of one tatami mat to the conductive layer of an adjacent tatami mat. When this is sequentially repeated, free electrons are uniformly distributed in all the conductive layers of the plurality of tatami mats. This allows free electrons, which are charged on the surface coating layer, to act on the body no matter where you sit on the adjacently laid tatami mats.

According to a third aspect of the present invention, in the configuration of the second aspect, the connection means is a conductive tatami edge that covers at least a part of a peripheral portion of the tatami mat.

According to the present invention, at least a part of the periphery of the tatami mat comprising the front surface coating layer, the conductive layer and the back surface coating layer is covered with a conductive tatami edge. It comes into contact with the tatami mat. Thus, the free electrons supplied to the conductive layer are also carried to the tatami edge. When a plurality of tatami mats configured as described above are laid with the tatami mat edges in contact with each other, the conductive layer of one tatami mat to which the electrostatic high-voltage generator is connected is adjacent to the one tatami mat. The free electrons move to the conductive layer of the tatami mat through the tatami edge. When this is repeated sequentially, free electrons are uniformly distributed in all the conductive layers of the plurality of tatami mats.

Further, since the conductive layers of adjacent tatami mats are not connected to each other by terminals or connectors as described above, the configuration is simplified and the aesthetic appearance of the tatami mats is not impaired.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the planar heating elements are provided in a stack.

In the tatami mat of the present invention, since the sheet heating elements are provided in a stack, the heat of the sheet heating elements is transmitted to the tatami mat.
As a result, when a person sits on the tatami mat, the body is warmed, and the health promotion effect by the action of the negative ions increases.

The present invention according to claim 5 provides a planar heating element,
A tatami mat comprising: a surface coating layer having a tatami mat provided on one surface of a sheet heating element; and a back coating layer provided on the other surface of the sheet heating element and covering the other surface. .

The tatami mat of the present invention has a sheet heating element, and a surface coating layer having a tatami mat surface is provided on one surface of the sheet heating element. On the other surface of the sheet heating element, a back surface coating layer is provided to cover the other surface. The heat generated from the planar heating element is transmitted to the surface coating layer and transmitted to the human body on the tatami mat.

[0021]

FIG. 1 is a cross-sectional view showing a tatami 1 according to an embodiment of the present invention in an enlarged manner in a thickness direction (vertical direction in FIG. 1), and FIG. FIG. Tatami 1
A plate-shaped conductive layer 3 on which free electrons, which are negative charges, move from the electrostatic high-voltage generator, and a surface coating layer 4 provided on one surface side (upper surface side in FIG. 1) of the conductive layer 3 and having a tatami mat 6 And a back surface coating layer 5 provided on the other surface side (the lower surface side in FIG. 1) of the conductive layer 3 and covering the other surface side. The surface coating layer 4, the conductive layer 3, and the back surface coating layer 5 are stacked in this order, and are joined by, for example, a thermosetting adhesive. In this joined state, both ends in the horizontal width direction (left-right direction in FIG. 1) are covered with cloth tatami edges 19 as connection means over the entire length in the vertical width direction (direction perpendicular to the paper surface in FIG. 1). Thereafter, the entire length in the vertical width direction along the imaginary line 18 is overlock-stitched with a sewing machine using a thread made of, for example, a synthetic resin to manufacture the tatami 1 of the present invention. As shown in FIG. 2, the dimensions of the tatami 1 are selected, for example, such that the vertical width L1 is 80 cm, the horizontal width L2 is 80 cm, and the thickness T1 is 1.2 cm. In addition, the tatami 1 of the present invention
Since the members are formed by bonding, unlike conventional tatami mats made of rice straw, the tatami mat can be manufactured without the need for a tatami mat, and the manufacturing time is greatly reduced.

The conductive layer 3 is an aluminum plate 9 which is a metal plate, and this aluminum plate 9 has excellent heat conductivity and electric conductivity. The thickness T2 of the conductive layer 3
Is selected to be 1 mm, for example.

As described above, the tatami 1 having the conductive layer 3 formed has a low material cost, is very lightweight, and is easy to carry. Thus, for example, only a small number of tatami mats 1 can be carried and laid on the flooring floor by only weak elderly people or children, and can be easily cleared only by elderly people or children after use.

The surface coating layer 4 is composed of a tatami mat 6 formed by knitting synthetic resin grasses and a carbon sheet 12 disposed below the tatami mat 6. The tatami mat 6 and the carbon sheet 12 are joined by a thermosetting adhesive,
Alternatively, they are joined by heat welding. The thickness T3 of this tatami table 6
Is set to, for example, 1 mm, and the thickness T4 of the carbon sheet 12 is set to, for example, 1 mm.

Tatami Table 6 is woven using an imitation grass made of a composite material in which an olefin-based synthetic resin, an inorganic material such as calcium carbonate, and a natural material such as sap are mixed. Such a tatami table 6 has a moderate absorbency and a slipperiness, does not cause discoloration or fading, does not generate mold, does not easily get dirt, has low water absorption, and has a moderate elasticity. No toxic gas is generated even if it is burned. Further, since the flash point and the ignition point are high, it is difficult to ignite, and it does not easily burn with, for example, tobacco ash.

The carbon sheet 12 is made of porous charcoal powder such as activated charcoal powder, coconut charcoal activated carbon, rice ash and the like, and a predetermined amount of a far infrared ray generating substance such as ceramic powder, for example, 50 wt. % Impregnated into a non-woven fabric made of polystyrene or the like. The carbon sheet 12 absorbs moisture and odor in the air, and further absorbs and stores heat. The absorbed moisture is gradually released when the surroundings are dried, and the odor is decomposed and deodorized. The stored heat is converted to far-infrared rays and dissipated. In this way, the indoor humidity can be adjusted and the odor can be deodorized, so that discomfort in the room is reduced and stress can be eliminated.

Polypropylene, which is the material of Tatami Table 6, has very low water absorption and high water repellency, so even if tea or coffee is spilled onto Tatami 1, water does not penetrate into the interior of Tatami 1. 6 can be wiped off with a rag or tissue paper.

The back surface coating layer 5 comprises a reinforcing member 14 made of polypropylene as a core material, a cushion member 15 made of polyethylene foam, and a non-slip member 16 made of synthetic rubber. The thickness T6 of the reinforcing member 14 is, for example, 5 mm, the thickness T7 of the cushion member 15 is, for example, 3 mm, and the thickness T8 of the non-slip member 16 is, for example, 1 mm.
Is chosen. The reinforcing member 14 is made of polypropylene and has excellent heat resistance, water resistance, oil resistance, and chemical resistance. Since the reinforcing member 14 is provided with a plurality of through holes 7 and ribs 11 extending in the vertical width direction (the direction perpendicular to the paper surface of FIG. 1), the reinforcing member 14 is lightweight, but has high compression. It has strength and moderate flexibility. As a result, although the tatami 1 has a compressive strength equal to or higher than that of the conventional tatami mat made of rice straw, the elderly have a similar or higher compressive strength.
The tatami 1 will not be greatly depressed even if the user moves onto the tatami 1 from the floor while being in a wheelchair and each wheel of the wheelchair is pressed locally.

The cushion material 15 is made of a polyethylene foam which is a thermoplastic material, and this polyethylene foam is excellent in water resistance, chemical resistance and restorability. Since the cushion member 15 has a cross-sectional configuration in which the cushion member 15 is interposed between the non-slip member 16 and the aluminum plate 9,
The tatami mat 1 has the same or higher elastic recovery force as that of a tatami mat made of conventional rice straw, and does not cause any discomfort when sitting on the tatami mat 1. Since the density of this polyethylene foam is as small as 0.065 g / cm ³ , the cushion material 15 is very light. Also, since the cushioning material 15 made of polyethylene foam has high water repellency,
The moisture on the floor under the tatami 1 does not penetrate to the inside.

The non-slip member 16 has a high coefficient of friction,
Further, a plurality of projections 21 are provided on a surface which is made of synthetic rubber and abuts on the floor. A slight convex portion of the flooring is fitted between the plurality of projections 21 to prevent the tatami 1 from skidding. Therefore, even if a child runs and moves onto the tatami 1 from the floor, the tatami 1 does not skid and is safe. Such a back surface coating layer 5 is formed by stacking a reinforcing member 14, a cushion member 15, and a non-slip member 16 in this order, and is joined by a thermosetting adhesive or by heat welding.

Cushion member 15 and non-slip member 1
Since 6 has flexibility, even if there is a slight step on the floor on which the tatami 1 is laid, the floor can be curved along the floor and adapted to the floor. Therefore, even if a part of the tatami 1 does not float off the floor and has a slight step, the tatami 1 according to the present embodiment can be laid suitably, and the tatami 1 can be tripped over and fall down. It can be used especially for kindergartens and nursing homes. Further, since the synthetic rubber constituting the non-slip member 16 has a higher specific gravity and a smaller coefficient of thermal expansion than the polyethylene foam constituting the cushion member 15, the tensile force acting on the tatami mat 6
Due to the difference in elongation due to the difference in the heat shrinkage rate between the tatami mat 1 and the cushion member 15, the tatami mat 1 is affected by the aging of the tatami mat 1 and the influence of the floor heating.
Warpage is prevented, thereby preventing the occurrence of troubles such as stumbling.

Further, since air is held in the through-holes 20 of the reinforcing member 14, the tatami 1 has a high heat retaining effect, and does not feel cold when sitting down like a tatami mat made of conventional rice straw.

When the tatami mat 1 is laid on a floor having a floor heating function, the heat of the floor heating is transmitted to the aluminum plate 9 via the ribs 17 of the reinforcing member 14. Since the heat transmitted to the aluminum plate 9 is transmitted to the tatami table 6, if the tatami 1 of the present invention is laid on the floor heated by the floor heating equipment, the heat of the floor is immediately transmitted to the tatami table and the heat is transmitted. Can be seated on the tatami 1 in a warm state without wasting.

The tatami edge 19 has a band shape longer than the entire length of the tatami 1 in the vertical width direction (the direction perpendicular to the paper surface of FIG. 1), and is formed by uniformly weaving a conductive gold thread, for example. The tatami edge 19 is formed by the front cover layer 4, the conductive layer 3, and the back cover layer 5.
Are covered with each other, and cover both ends in the horizontal width direction (left-right direction in FIG. 1) over the entire length in the vertical width direction (direction perpendicular to the paper surface of FIG. 1). At this time, both ends in the width direction (vertical direction in FIG. 1) of the folding edge 19 are folded inward. As described above, in the state where both ends in the width direction of the tatami edge 19 are folded inward, the entire length in the vertical width direction of the tatami 1 is overlaid with a sewing machine along the imaginary line 18 to manufacture the tatami 1. At this time, both ends in the width direction of the conductive layer 3 are sewn so as to be always in contact with and electrically connected to the tatami edge 19.

The thickness T1 of the tatami 1 constructed as described above
Is a very thin building having a thickness of 12 mm, as shown in FIG. 3, for example, an apartment house or the like where a Western-style room 62 and a Japanese-style room 61 are arranged adjacently on a concrete floor 27 extending in one plane. Even in this case, the tatami 1 can be laid without any steps on the upper surfaces of the tatami 1, the sill 28 and the flooring board 29. Therefore, there is no step between the floor of the Japanese-style room 61 and the floor of the Western-style room 62, so that accidents such as tripping and falling can be reduced, and a suitable living space can be obtained especially in a home with infants and the elderly.

Also, since the aluminum plate 9 is used as the conductive layer 3, even if a pin or the like is inadvertently inserted to fix the tatami mat on the floor, the pin does not easily penetrate the aluminum plate 9; The charge of the plate 9 is prevented from leaking to the floor or the like.

One use example of the tatami 1 of the present invention will be described.
As shown in FIG. 4, a plurality of (three in this embodiment) tatami 1A
~ 1C are laid in parallel, and the laid tatami mats 1A ~ 1C
Of the flooring and the tatami mats 1A to 1C can be smoothly continued. As a result, the tatami mats 1A to 1C can be ridden from the floor of the flooring without a person tripping when passing by. In particular, in a kindergarten, it is less likely that a child trips and falls. In addition, as shown in FIG.
By laying three pieces of １1C in parallel, a simple bed that is lightweight and can be easily moved and can be stored.

Referring again to FIG. 1, electrostatic high voltage generator 2
Converts a household commercial voltage of, for example, AC 100 V to DC 10
This is a device that converts the voltage to an electrostatic voltage of 00 V or less and supplies free electrons that are negative charges to the aluminum plate 9 of the conductive layer 3.
The high-voltage generator 2 is connected to the aluminum plate 9 of the conductive layer 3 via a lead wire 22. FIG.
FIG. 4 is a view showing a connection method between a metal plate and an aluminum plate 9. FIG.
As shown in (1), a part of the reinforcing member 14 of the back surface coating layer 5 is cut out, and the lead terminal 23 at one end of the lead wire 22 is inserted into this notch. The lead terminals 23 are soldered to the aluminum plate 9. The other end of the lead wire 22 is a jack terminal 24.

As shown in FIG. 2, the lead wire 22 is drawn out from the edge 63 of the tatami 1 to one side, and the lead-out portion near this edge 63 is molded and reinforced with synthetic resin. This prevents the lead wire 22 from being cut even when the lead wire 22 pulled out from the edge 63 is stepped on, and prevents the lead wire 22 from coming off even when the lead wire 23 is pulled. Is done. Further, the lead wire 23 is held on the aluminum plate 9 by a binding band in parallel with the lateral width direction L2.

The free electrons supplied to the aluminum plate 9 are uniformly distributed over the entire surface of the aluminum plate 9,
Thereafter, through the carbon sheet 12, the surface of the tatami mat 6 is charged and discharged into the atmosphere. The cushion member 15 and the non-slip member 16 of the back surface coating layer 5 are each made of an insulating material and are formed thicker than the surface coating layer 4, so that they are uniformly distributed on the aluminum plate 9. The electrons do not escape to the floor of the flooring on which the tatami 1 is laid, that is, the ground side. Thereby, the free electrons moved from the electrostatic high-voltage generator 2 are surely charged on the surface of the tatami mat 6 and discharged into the atmosphere.

When the electric cord 26 of the charge supply source 2 is connected to a house outlet and the power button 27 is turned on, the LED lamp 35 of the operation unit 4 is turned on, and free electrons move to the conductive layer 3 of the tatami 1. At this time, if the LED lamp 36 is not turned on, it can be confirmed that free electrons are not supplied to the conductive layer 3 and the tatami 1 and the electrostatic high-voltage generator 2 are not electrically connected.

When the level switch button 32 on the operation unit 34 of the electrostatic high-voltage generator 2 is pressed, the intensity of the high-voltage static voltage applied to the aluminum plate 9 can be changed in four steps, and the corresponding high-voltage static voltage can be changed. LE corresponding to strength
Any one of the D lamps 39 to 43 lights up. LED
When the lamp 39 is turned on, 320
When the negative high-voltage static voltage of V is applied and the LED lamp 40 is turned on, a negative high-voltage static voltage of 500 V is applied in the tatami table 6 and when the LED lamp 41 is lit, the negative high voltage of 720 V is displayed in the tatami table 6. When a high static voltage is applied and the LED lamp 42 is turned on, 90
A negative high static voltage of 0 V is applied. This has been confirmed by the applicant's experiments.

The electrostatic high-voltage generator 2 can switch between continuous operation and timer operation.
When the button is pressed, the LED lamp 43 is turned on, and the continuous operation is performed. When the timer switching button 30 is pressed, the operation time of the electrostatic high-voltage generator 2 can be changed.
When the D lamp 44 is lit, a 15-minute timer operation is performed. When the LED lamp 45 is lit, a 30-minute timer operation is performed. When the LED lamp 46 is lit, a 45-minute timer operation is performed. When the lamp 47 is lit, a one-hour timer operation can be performed.

Next, the effect of the tatami mat 1 of the present invention acting on the body will be described with reference to FIG. Figure 6 shows tatami 1 and body 37
This corresponds to Takada's electrostatic potential load therapy. When the body 37 is mounted on the tatami mat 1 of the present invention, the body 37 is insulated from the earth 38. Body 3
7 is made from a good electrolyte solution conductivity, since it can be regarded as a conductor, the body 37 rides tatami 1, the potential V ₂ of the body is equal to the potential V ₁ of the mat 1, the body 37 Are free electrons acting as charges of Q ₁ = C ₂ V ₁ . This charge Q ₁ is a capacitance C ₂ between the body 37 and the earth 38.
Is proportional to

That is, when the skin epidermis of the body contacts the free electrons charged on the surface 6 of the tatami mat 1, the free electrons cause an interfacial reaction with the electrolyte solution of the body, and Q
₁ = The number of C ₂ V ₁ only negative ions increases than positive ions.

This negative ion is generally known to be good for health. The pH value of the body fluid of a healthy person is 7.3
It is in the narrow range of 5 to 7.45 on the weakly alkaline side, and in the body 37, this pH value is maintained at around 7.4 to maintain health. However, car exhaust gas, factory exhaust gas, toxic substances such as dioxin, food colorant,
Preservatives increase body positive ions and increase body fluid pH
The value is gradually moving to the acidic side. When the number of negative ions in the body is increased by the tatami mat 1 of the present embodiment, the pH value in the body can be kept weakly alkaline, and blood can be purified. As a result, the purified blood can be smoothly transported to every corner of the body, the cells of the whole body can be activated, and the nerve function can be maintained normally.

The state where the LED lamp 42 is turned on,
That is, it has been confirmed by experiments by the applicant that when the negative high-voltage static voltage of 900 V is applied to the tatami table 6, the above-described electrostatic field by the high-voltage static voltage acts up to a height of 1 m above the tatami table 6. As described above, the area of the surface of the tatami 1 of the present invention affected by free electrons is wide, and the electrostatic field acts on the indoor air, thereby increasing the number of negative ions in the air. Even if the negative ions in the atmosphere are taken into the body by breathing, blood circulation is promoted and relaxation can be achieved.

Further, when a negative high-voltage static voltage is applied to the conductive layer 3 of the tatami 1 and sake is placed on the tatami 1 and the electrostatic field is applied to the sake throughout the day and night, the taste of the sake is enhanced. It has been confirmed through joint experiments between the applicant and the brewing maker that it has changed and becomes mellow.

In the present application, if a vase containing a fresh flower is placed on the tatami 1 while an electrostatic voltage is applied to the tatami 1 and this electrostatic field is applied to the fresh flower, the life of the fresh flower is prolonged. It has been confirmed by human experiments.

FIG. 7 is a view showing a state in which a plurality of tatami mats 1 (four in this embodiment) are laid. As shown in FIG. 7, the tatami 1a is connected to the electrostatic high-voltage generator 2 via a lead wire 22, and the four tatami mats 1a, 1b, 1c, 1d
The tatami mats 19 are laid in contact with each other. As described above, since the tatami edge 19 is formed by uniformly weaving a gold thread having good conductivity, the free electrons moved from the high-voltage generator 2 to the conductive layer 3a of the tatami 1a via the lead wire 22 are formed. Moves to the conductive layer 3b of the adjacent tatami mat 1b via the tatami mats 19b, 19c, and furthermore, the tatami mats 19a, 19f, 19
b, and move to the conductive layer 3c of the adjacent tatami mat 1c via 19g. After that, the free electrons that have moved to the conductive layers 3b, 3c of the tatami mats 1b, 1c are separated by tatami mats 19c, 19a, 19g, 19
h and 19i, it moves to the conductive layer 31 of the tatami mat 1d. As described above, the free electrons move to the four tatami mats 1a to 1d, and the moved free electrons are applied to the conductive layers 3a to 3d of each tatami mat 1a to 1d.
d uniformly distributed. If the electrostatic high-voltage generator 2 is connected to one tatami mat 1a in this manner, free electrons are uniformly distributed to other tatami mats 1b to 1c via the tatami mat edges 19a to 19i.
It is not necessary to connect the electrostatic high-voltage generator 2 to all of the tatami mats 1a to 1d. Thus, for example, if one person sits on each of the tatami mats 1a to 1d, four electrons can be applied to four people by one electrostatic high voltage generator 2, which is economical. Also,
It has been confirmed by the applicant's experiment that a negative high static voltage having the same strength as that of the tatami 1a is applied to the tatami mats 1b to 1d. For example, a 900 V negative static voltage is applied to the surface of the tatami mat 1a. Then, a negative static voltage of 900 V is applied to the surfaces of the other tatami mats 1b to 1d. The power consumed at this time is 17 to 20 W per tatami mat in a state where a static voltage of 900 V is applied.

FIG. 8 is a sectional view showing a tatami 101 according to another embodiment of the present invention in an enlarged manner in a thickness direction (vertical direction in FIG. 8). FIG. 9 is a perspective view of the tatami 101. is there. Tatami 1
Reference numeral 01 denotes a plate-shaped conductive layer 103 on which free electrons as negative charges move from the electrostatic high-voltage generator, and a surface provided on one surface side (the upper surface side in FIG. 8) of the conductive layer 103 and having a tatami table 106. It comprises a coating layer 104 and a back coating layer 5 provided on the other surface side (the lower surface side in FIG. 8) of the conductive layer 103 and covering the other surface side. The surface coating layer 104, the conductive layer 103, and the back surface coating layer 105 are stacked in this order, and are joined by, for example, a thermosetting adhesive. In this joined state, both ends in the horizontal width direction (horizontal direction in FIG. 8) are covered with cloth tatami edges 119 as connection means over the entire length in the vertical width direction (direction perpendicular to the paper surface in FIG. 8). Thereafter, the entire length in the vertical width direction along the imaginary line 118 is overlock-stitched with a sewing machine using a thread made of, for example, a synthetic resin, to manufacture the tatami 101 of the present invention. As shown in FIG. 9, the dimensions of the tatami 1 are, for example, a height L11 of 80 cm, a width L12 of 80 cm, and a thickness T.
11 is chosen to be 1.5 cm. Also, the tatami 101 of the present invention
Can be manufactured without the need for a tatami craftsman, unlike traditional tatami mats made of rice straw, because each member is bonded and formed.
Manufacturing time is greatly reduced.

The conductive layer 103 is made of a porous synthetic resin plate 108 serving as a core material, and two metal sheets attached to the upper and lower surfaces of the porous synthetic resin plate 108 with a thermosetting adhesive. It is composed of plate-like aluminum plates 109 and 110. The thickness T12 of the conductive layer 103 is, for example, 3
mm. The porous synthetic resin plate 8 is made of polypropylene and has excellent heat resistance, water resistance, oil resistance, and chemical resistance. Since the porous synthetic resin plate 8 has a plurality of through holes 107 and ribs 111 extending in the vertical width direction (perpendicular to the plane of FIG. 8), the porous synthetic resin plate 108 is Despite being lightweight, it has high compressive strength and moderate flexibility. Aluminum plate 10
9,110 is lightweight and excellent in heat conductivity and electric conductivity. As described above, by forming the conductive layer 103 from the two thin aluminum plates 109 and 110 and the porous synthetic resin plate 8, the conductive layer 3 is lightweight, has high compressive strength, Manufactured at cost.

As described above, the tatami mat 101 having the conductive layer 103 is excellent in air permeability, requires less material cost, is extremely lightweight, and is easy to carry. Accordingly, for example, a plurality of tatami mats 101 can be carried and laid on the flooring floor by only a weak elderly person or a child, and can be easily cleared only by the elderly person or a child after use.

The surface coating layer 104 is composed of a tatami mat 106 formed by knitting synthetic resin grasses, a carbon sheet 112 disposed below the tatami mat 106, and a cushion member 113 made of synthetic resin. The tatami mat 106, the carbon sheet 112, and the cushion member 113 are joined by a thermosetting adhesive, or joined by heat welding. The thickness T13 of the surface coating layer 114 is selected to be, for example, 4 mm.

The tatami table 106 shows that the olefin-based synthetic resin
It is woven using imitation grass made of a composite material in which an inorganic material such as calcium carbonate is blended with a natural material such as sap such as tar. Such a tatami table 106 has a moderate absorbency and a slipperiness, does not cause discoloration or fading, does not generate mold, does not easily get dirt, has low water absorption, and has a moderate elasticity. No toxic gas is generated even if it is burned. Further, since the flash point and the ignition point are high, it is difficult to ignite, and it does not easily burn with, for example, tobacco ash.

The carbon sheet 112 is made of a porous carbon powder such as activated charcoal powder, coconut charcoal activated charcoal or rice ash, and a predetermined amount of far infrared ray generating substance such as ceramic powder, for example, 50 wt. % Impregnated into a non-woven fabric made of polystyrene or the like. This carbon sheet 112 absorbs moisture and odor in the air,
It also absorbs and stores heat. The absorbed moisture is gradually released when the surroundings are dried, and the odor is decomposed and deodorized.
The stored heat is converted to far-infrared rays and dissipated. Thus, the indoor humidity can be adjusted and the odor can be eliminated, so that the discomfort in the room is reduced and the stress can be eliminated.

The cushion material 113 is made of a polyethylene foam which is a thermoplastic material, and this polyethylene foam is excellent in water resistance, chemical resistance and restoring property.
Since the cushion member 113 has a cross-sectional structure in which the cushion member 113 is interposed between the tatami table 106 and the aluminum plate 109, the cold feeling of the aluminum plate 109 is not felt when sitting on the tatami 101. In addition, the tatami 101 has an elastic recovery force equal to or higher than that of a tatami mat made of conventional rice straw, and does not cause any discomfort when sitting on the tatami mat 101.

Polyethylene foam, which is the material of the cushioning material 113, and polypropylene, which is the material of the tatami mat 106, have very low water absorption and high water repellency, so that even if tea or coffee is spilled on the tatami 101, moisture will not be removed. Tatami 1
It is only necessary to wipe off the tatami table 106 with a rag or tissue paper without penetrating into the interior of the tatami mat 01. Since the density of this polyethylene foam is as small as 0.065 g / cm ³ , the cushion material 113 is very light.

The back surface coating layer 105 is composed of a reinforcing member 114 made of polypropylene as a core material, a cushion member 115 made of polyethylene foam, and a non-slip member 116 made of synthetic rubber. The reinforcing member 114 is
Similarly to the porous synthetic resin plate 8, a plurality of through holes 120 and ribs 117 made of polypropylene and extending in the vertical width direction of the tatami 101 (a direction perpendicular to the paper surface of FIG. 13) are formed. Thereby, the reinforcing member 114 is very lightweight and has high compressive strength. With this, the tatami 101 becomes
Despite being 40 mm thinner than conventional tatami made of rice straw, it has the same or higher compressive strength. The tatami mat 101 is not largely depressed even if the user moves onto the 101 and each wheel of the wheelchair is pressed locally. The cushion member 115 has substantially the same configuration as the cushion member 112 of the surface coating layer 4, and thus the description is omitted.

The non-slip member 116 has a high coefficient of friction and is made of synthetic rubber, and has a plurality of projections 121 on a surface that contacts the floor. A slight protrusion of the flooring is fitted between the plurality of protrusions 121, and the tatami 101
Side slip is prevented. Therefore, even if a child runs and gets on the tatami mat from the floor, the tatami mat 1 does not skid and is safe. Such a back surface coating layer 105 is formed by stacking a reinforcing member 114, a cushion member 115, and a non-slip member 116 in this order, and is joined by a thermosetting adhesive or by heat welding. The thickness T14 of the back surface covering layer 105 is selected to be, for example, 8 mm.

Here, since the cushion member 115 and the non-slip member 116 have flexibility, even if there is a slight step on the floor on which the tatami 101 is laid, it is curved along the floor and conforms to the floor. be able to. Therefore, even if a part of the tatami 101 is a floor having a slight step without floating on the floor, the tatami 1 of the present embodiment can be laid suitably, and the tatami 101 does not trip over and fall down. Particularly, it can be suitably used for kindergartens and nursing homes. Further, since the synthetic rubber forming the non-slip member 116 has a higher specific gravity and a smaller coefficient of thermal expansion than the polyethylene foam forming the cushion member 115, the tensile force applied to the tatami table 106 and the tatami table 106 and the cushion members 113 and 115 Due to the difference in elongation caused by the difference in thermal shrinkage of the tatami mats, the tatami mats are prevented from warping due to the aging of the tatami mats and the influence of the floor heating, thereby preventing the occurrence of troubles such as stumbling.

Since air is held in the through-hole 107 of the porous synthetic resin plate 108 and the through-hole 120 of the reinforcing member 114, the tatami 101 has a high heat-retaining effect, and is similar to a conventional tatami mat made of rice straw. You won't feel cold when you sit.

The tatami 101 is placed on a floor having a floor heating function.
When the floor is laid, the heat of the floor heating is
7 to the aluminum plate 110, and from the aluminum plate 110 to the ribs 1 of the porous synthetic resin plate 108.
11 to the aluminum plate 109. Since the heat transmitted to the aluminum plate 109 is transmitted to the tatami mat 106, if the tatami 101 of the present invention is laid on the floor heated by the floor heating equipment, the heat of the floor is immediately transmitted to the tatami mat and the heat is transmitted. Can be seated on the tatami 101 in a warm state without wasting.

The tatami edge 119 is in the vertical width direction of the tatami 101 (FIG. 8).
The direction perpendicular to the paper surface) is longer than the entire length, is cloth-like, and is formed by uniformly weaving a conductive metal wire such as a gold thread. The tatami edge 119 is formed by the surface coating layer 104 and the conductive layer 1.
03 and the back surface covering layer 105 are respectively bonded, and both ends in the horizontal width direction (the left-right direction in FIG. 8) are covered over the entire length in the vertical width direction (the direction perpendicular to the paper surface in FIG. 8). At this time, both ends of the tatami edge 119 in the width direction (vertical direction in FIG. 8)
Folded inside. As described above, in a state where both ends in the width direction of the tatami edge 119 are folded inward, the entire length in the vertical width direction of the tatami 101 is sewn along the imaginary line 118 with a sewing machine to manufacture the tatami 101. At this time, the conductive layer 103 is sewn so that both ends in the width direction always contact the tatami edge 119. The thickness T1 of the tatami mat 1 configured as described above is
Very thin, 15 mm.

The electrostatic high voltage generator 102 is, for example,
This is a device that converts a household commercial voltage of 00 V into a static voltage of DC 1000 V or less and supplies free electrons, which are negative charges, to the aluminum plates 109 and 110 of the conductive layer 103. The aluminum plates 109 and 110 of the conductive layer 3 are
An electrostatic high-voltage generator 102 is connected via 22. FIG.
0 is a diagram showing a connection method between the lead wire 122 and the conductive layer 103. As shown in FIG. 10, a part of the cushion member 113 of the surface coating layer 104 and a part of the reinforcing member 114 of the back surface coating layer 105 are respectively cut out, and the cutouts are divided into two ends at one end of the lead wire 122. 123
Are respectively inserted. The lead terminals 123 are soldered to the aluminum plates 109 and 110. The other end of the lead wire 122 is a jack terminal 124.

As shown in FIG. 9, the lead wire 122 is
01 is pulled out to one side from the edge 163, and this edge 16
The drawer near 3 is molded and reinforced with synthetic resin. As a result, even if the user steps on the lead wire 122 drawn out from the edge 163, the lead wire 12
2 is prevented from being cut, and even if the lead wire 123 is pulled, the lead wire 122 is prevented from coming off.

The free electrons supplied to the aluminum plate 109 are uniformly distributed over the entire surface of the aluminum plate 109, and then charged on the surface of the tatami mat 106 via the cushion member 113 and the carbon sheet 112 and discharged into the atmosphere. . Further, the cushion member 11 of the back surface coating layer 105
5 and the non-slip member 116 are each made of an electrically insulating material and are formed to be thicker than the surface coating layer 104, so that the tatami 101 is laid on the aluminum plate 110 in which free electrons uniformly distributed are laid. It does not escape to the floor of the floor, ie the ground side. As a result, the free electrons moved from the electrostatic high voltage generator 102 are surely charged on the surface of the tatami mat 6 and discharged into the atmosphere.

Another example of the use of the tatami mats 101 according to the present invention will be described. For example, if the tatami mat 1,101 of the present invention is laid in a room next to a bathroom in a nursing home, and the tatami mat 1,101 is seated with a damp body after a bath, free electrons are more likely to act on the body. A further health promotion effect is obtained. Also, at this time, moisture does not penetrate into the tatami 1, 101,
All that is required is to wipe off the water on the tatami table 1 and 101 with a rag.

As another embodiment of the present invention, the tatami mat 1, 101 of the present invention has a height L1 of 80 cm and a width L2 of 80c.
Not only the size of m but also the distance between the conventional Honma (height 191 x width 95.5cm), 36 (height 182 x width 91.0c)
m), and may correspond to 58 (width 176 × width 88 cm). Further, the thickness T1 is not limited to 15 mm, but may be 1 m
It is also possible to form a tatami mat having a thickness T1 of 3 mm, which is made up of a front cover layer 4 of m, a conductive layer 3 of 1 mm, and a back cover layer 5 of 1 mm. Also, a tatami mat having a thickness T1 of 5.5 cm can be formed in the same manner as a tatami mat made of rice straw.

Further, the tatami mats 49, 50 and 51 of the other embodiments of the present invention are not limited to the conventional square tatami mats, but are circular tatami mats 49 shown in FIG. 11 and triangular tatami mats 50 shown in FIG. , May be formed like an elliptical tatami 51 shown in FIG. As a result, the variety of interior decoration of a luxury inn, a Japanese restaurant, etc. is widened. Further, in a so-called folding chair in which a chair, for example, a seating portion and a back plate are connected by a hinge so as to be angularly displaceable, the tatami mat of the present invention can be suitably used for the seating portion and the back plate.
Further, it may be used on the entire surface from the seating portion of the chair to the back plate.

As a tatami 52 according to still another embodiment of the present invention, both ends of the tatami 52 in the width direction (left and right directions in FIG. 14) are heated by heating elements 53 as shown in FIG. The surface coating layer 4, the conductive layer 3, and the back surface coating layer 5 may be thermally welded by applying pressure.

A tatami mat 54 according to still another embodiment of the present invention is a tatami mat having a planar heating element 55 as shown in FIG. A surface coating layer 73 having a tatami mat surface is provided on one surface of the sheet heating element 55, and a back surface coating layer 13 is provided on the other surface.
Is provided. The heat generated from this planar heating element 6 is:
It is transmitted to the surface coating layer 6 and transmitted to the human body on the tatami mat 54. In this way, it is possible to warm up by sitting on the tatami mat 54 in winter. Further, the carbon sheet 12 is warmed by the sheet heating element 55, and far infrared rays are generated from the carbon sheet 12. This far-infrared ray raises the temperature of the deep subcutaneous layer of the body and can obtain the effect of promoting blood circulation.

FIG. 16 shows the configuration of a tatami 81 according to still another embodiment of the present invention. The tatami 81 has an aluminum plate 82 which is a long plate-shaped conductive layer, and two long plate-shaped conductive plates arranged at predetermined intervals from both ends in the width direction (left-right direction in FIG. 17) of the aluminum plate 82. Planar heating element 8
3, 84.

An electrostatic high voltage generator 86 is connected to the aluminum plate 82 via a lead wire 85 to apply a high static voltage. The two sheet heating elements 83 and 84 are provided with a heating resistance wire such as a nichrome wire or a stainless steel wire covered between a pair of electrodes, and a household AC 100 V is applied between the pair of electrodes. When the commercial power supply 87 is applied, heat is generated. The tatami 81 configured as described above can cause free electrons to act on the body, can warm the body with warm heat, and can further improve the health promotion effect.

As a conductive layer 56 according to still another embodiment of the present invention, as shown in FIG. 17, a plurality of punched holes 57 are formed on the entire surface of two aluminum metal plates 9 and 10.
May be provided. Thus, the weight of the conductive layer 56 is further reduced. The material of the metal plates 9, 109, 110 is not limited to an aluminum plate, but may be a copper plate or a duralumin plate having excellent heat conductivity and electric conductivity.

Further, as a tatami table of still another embodiment of the present invention, a tatami table made of natural rush may be used. Since the tatami mat made of natural rush contains a suitable amount of water, the tatami mat has excellent conductivity and can transmit free electrons to the body well.

Further, as a tatami mat according to still another embodiment of the present invention, a tatami mat printed on a sheet made of polyethylene, for example, may be used.

As a connecting means according to still another embodiment of the present invention, as shown in FIG. 18, a female connector 59 buried at the longitudinal end of one tatami mat 1k is connected to another tatami mat 11l. The conductive layer 3k of the tatami mat 1k may be electrically connected to the conductive layer 3l of the tatami mat 1k by fitting a male connector 58 provided at the end in the longitudinal width direction. With this, tatami mat
Can be electrically connected to the tatami mat 11 and the two tatami mats 1k and 11 can be fixed so as not to be separated from each other.

[0079]

According to the first aspect of the present invention, the tatami mat of the present invention has a plate-shaped conductive layer to which an electrostatic voltage is applied from an electrostatic high-voltage generator. Is provided with a surface coating layer having a tatami mat surface. In addition, on the other surface of the conductive layer, a back surface coating layer that covers the other surface, gives elasticity to the tatami mats, and prevents warp of the tatami mats is provided. When a negative high static voltage is applied to the conductive layer from the electrostatic high voltage generator, the surface coating layer is negatively charged. In this state, when a person rides on the tatami surface, free electrons act on the body from the contact point between the body and the tatami surface, for example, the sole of the foot, from the surface coating layer. Ions are generated, and the action of the negative ions can promote health.

Also, by appropriately selecting the material of the back cover layer of the tatami mat configured as described above, various properties such as hardness and elasticity similar to those of the conventional tatami mat using rice straw can be achieved. In addition, the thickness can be reduced. Even if this tatami is laid on the floor of the floor, the step between the tatami and the floor of the floor is small. This reduces the possibility that the child will trip over a step and fall, and since this tatami is thin but has a moderate compressive strength, even if the tatami gets on the tatami from the floor in a wheelchair, the tatami may dent Absent. Also, since it is lightweight, it can be easily transported by elderly people and children.

According to the second aspect of the present invention, when a plurality of tatami mats are laid on the floor of the flooring, the respective conductive layers of the adjacent tatami mats are electrically connected by the connecting means. Is connected to one of the conductive layers of the tatami mat and one of the electrostatic high-voltage generators, and an electrostatic voltage is applied from the electrostatic high-voltage generator to the conductive layer of the single tatami mat to obtain the electrostatic high-voltage. Free electrons can be transferred from the conductive layer of one tatami mat to which the generator is connected to the conductive layer of an adjacent tatami mat. When this is sequentially repeated, free electrons are uniformly distributed in all the conductive layers of the plurality of tatami mats. This allows free electrons, which are charged on the surface coating layer, to act on the body no matter where you sit on the adjacently laid tatami mats.

According to the third aspect of the present invention, at least a part of the periphery of the tatami mat comprising the front surface coating layer, the conductive layer and the back surface coating layer is covered with a conductive tatami edge. The edge of the layer and the tatami edge abut. Thus, the free electrons supplied to the conductive layer are also carried to the tatami edge. When a plurality of tatami mats configured as described above are laid with the tatami mat edges in contact with each other, the conductive layer of one tatami mat to which the electrostatic high-voltage generator is connected is adjacent to the one tatami mat. The free electrons move to the conductive layer of the tatami mat through the tatami edge. When this is repeated sequentially, free electrons are uniformly distributed in all the conductive layers of the plurality of tatami mats.

Further, since the conductive layers of adjacent tatami mats are not connected to each other with terminals or connectors as described above, the configuration is simplified and the aesthetic appearance of the tatami mats is not impaired.

According to the fourth aspect of the present invention, the tatami mat of the present invention is provided with a stack of planar heating elements, so that the heat of the planar heating elements is transmitted to the tatami mat. As a result, when a person sits on the tatami mat, the body is warmed, and the health promotion effect by the action of the negative ions increases.

According to the fifth aspect of the present invention, the tatami mat of the present invention has a sheet heating element, and a surface coating layer having a tatami mat surface is provided on one surface of the sheet heating element. On the other surface of the sheet heating element, a back surface coating layer is provided to cover the other surface. The heat generated from the planar heating element is transmitted to the surface coating layer and transmitted to the human body on the tatami mat.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a tatami mat 1 according to an embodiment of the present invention in an enlarged manner in a thickness direction.

FIG. 2 is a perspective view of the tatami mat 1. FIG.

FIG. 3 is a view showing a state where the tatami mat 1 is laid on a concrete floor of an apartment.

FIG. 4 is a view showing a state where three tatami mats 1A to 1C are arranged in parallel and surrounded by a tatami frame 48;

FIG. 5 is a diagram illustrating a method of connecting a lead wire 22 and a conductive layer 3;

6 is an equivalent circuit between the tatami 1 and the body 37. FIG.

FIG. 7 is a view showing a state where a plurality of tatami mats 1 of the present invention are laid.

FIG. 8 shows a tatami mat 10 according to still another embodiment of the present invention.
FIG. 1 is a cross-sectional view showing a portion 1 in an enlarged manner in a thickness direction.

9 is a perspective view of the tatami 101. FIG.

FIG. 10 is a diagram showing a connection method between a lead wire 122 and a conductive layer 103.

FIG. 11 is a perspective view showing a tatami mat 49 according to still another embodiment of the present invention.

FIG. 12 shows a tatami mat 50 according to still another embodiment of the present invention.
FIG.

FIG. 13 shows a tatami mat 51 according to still another embodiment of the present invention.
FIG.

FIG. 14 shows a tatami mat 52 according to still another embodiment of the present invention.
It is a figure showing the manufacturing method of.

FIG. 15 is a cross-sectional view of a tatami mat 54 with a planar heating element 55 according to still another embodiment of the present invention.

FIG. 16 is a view showing a tatami 81 according to still another embodiment of the present invention.

FIG. 17 is a perspective view showing a conductive layer 56 according to another embodiment of the present invention.

FIG. 18 is a perspective view showing connectors 58 and 59 which are connection means according to another embodiment of the present invention.

[Explanation of symbols]

 1, 49, 50, 51, 52, 71, 81, 101 tatami 2 Electrostatic high voltage generator 3, 56, 103 Conductive layer 4, 73, 104 Surface coating layer 5, 74, 105 Back coating layer 6 Tatami table 9 Aluminum plate 12 Carbon sheet 19 Tatami edge 55,83,84 Planar heating element

Claims (5)

[Claims] 1. A plate-shaped conductive layer to which an electrostatic voltage is applied, a surface coating layer provided on one surface of the conductive layer and having a tatami mat, and provided on another surface of the conductive layer. A tatami mat comprising: a back cover layer that covers the tatami mat. 2. The tatami mat according to claim 1, further comprising connection means for electrically connecting the conductive layers of the plurality of tatami mats to each other. 3. The tatami mat according to claim 2, wherein the connection means is a tatami mat having conductivity covering at least a part of a peripheral edge of the tatami mat. 4. The tatami mat according to claim 1, wherein the planar heating elements are provided in a stack. 5. A sheet heating element, a surface coating layer having a tatami mat provided on one surface of the sheet heating element, and a back coating layer provided on another surface of the sheet heating element and covering the other surface And a tatami mat comprising: