JP2010265661A - Tatami mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tatami mat which is hardly burnt in itself, and prevents a fire from spreading to other places for a fixed period of time, and has many advantages but weaknesses such as low thermal resistance and being liable to flare up in a comparatively short time, and recently requires to be given consideration to the prevention of a fire occurring in a place from spreading to other places or delaying the spreading of the fire as much as possible. <P>SOLUTION: The front surface and the rear surface of a core material are covered with aluminum sheets, a tatami facing is provided on the front surface side and a plastic fabric is provided on the rear surface side. Materials other than the tatami facing are integrally sewn. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a tatami mat.

  The tatami mats have been used for a very long time. In the old days, tatami mats made of natural rusha were sewn on the floors made of cocoons. In recent years, tatami mats using plastic tatami floors and plastic imitation rushes have been used recently because of their heavy cocoons, food for mites, etc.

  Apart from this, the biggest disaster for houses is fire. Needless to say wooden, the interior and furniture are almost flammable even if they are made of reinforced concrete. Therefore, if a fire breaks out from a part of the house, the whole fire will be immediately turned.

  Whether or not a person who actually catches fire on the first floor and sleeps on the second floor is saved depends on how long the fire turns on the second floor. In large buildings, they are prepared like fire shutters and iron doors, which close when a fire breaks out and prevent the next room from burning. Thus, in the 1st floor, 2nd floor, and multiple floor structures, the tatami mat as the flooring material is also considered as the partition material, so that the similar firing to the upper and lower floors is prevented.

  However, this is not only difficult in a private house, but it is impossible to install it on the ceiling of the first floor.

  In addition, tatami mats are conventionally made of combustible materials, and there has been no idea of preventing fire spread with tatami mats. This is the same with ancient plastic floors, but the same is true with modern plastic ones.

  Therefore, the present inventor provides a tatami mat that prevents fire spread to other places for a certain period of time only by burning the tatami mat.

  In view of the situation as described above, the inventor has completed the tatami mat of the present invention as a result of diligent research, and the feature is that the front and back of the core material are covered with an aluminum sheet, and the tatami front and back are on the front side. A plastic fabric is provided on the side, and the parts other than the tatami mat are sewn together.

  The tatami mat used in the present invention may be one using natural rush or one using imitation rush. This part is flammable, but it is a surface material, which is different from fireproofing and fireproofing. It is the same way of thinking, with a paper wall on a refractory concrete wall and still burning.

Here, the core material may be any material as long as it can be formed into a plate shape, but a wood fiber board or plastic cardboard is preferable.
The wood fiber board is obtained by compression molding of pulp, and an insulation board is particularly preferable. This is light, has shape retention, and has a certain degree of elasticity.
The thickness of the wood fiber board may be calculated backward from the thickness of the entire tatami mat. When thin tatami mats are used, the thickness is about 5 to 15 mm. When thick tatami mats (50 mm or more) are used, the thickness is increased accordingly. Good. In short, the thickness of the tatami is free.

  Plastic corrugated cardboard has a structure in which two upper and lower sheets are connected by a number of plates, and is usually manufactured by extrusion using a die having a shape like a ladder. There is a name for plastic corrugated cardboard because its cross-sectional shape is similar to corrugated cardboard. The material is a thermoplastic resin such as polyethylene or polypropylene, and those with various thicknesses are commercially available. When used alone, the thickness may be the same as that of the wood fiber board.

Next, an aluminum sheet, which is not as thin as a foil, has a thickness of 50 μm or more. Considering cushioning properties and fire resistance, 50 μm to 120 μm is preferable.
There are a hard type and a soft type in an aluminum sheet, and a soft type is suitable in the present invention. If the soft type is used, for example, not only the feeling of walking as a tatami mat is good, but also the cut end portion is soft, so that there is less injury even when the tatami is manufactured.

The fact that this aluminum sheet is attached to the front and back means that the core material inside the aluminum sheet is protected from flames and not only prevents the core material from spreading to adjacent rooms, but also because of the heat sink effect, This makes it difficult to burn up to the material. For example, in a paper pot, even if the paper is in direct flame, the pot will not burn when water is in the pot. This is because the water inside takes away heat and the paper does not reach the firing point and therefore does not burn.
Also in the present invention, when an aluminum sheet is stuck on the back surface, heat is immediately transmitted, and the temperature of the portion hit by the flame hardly rises, and it takes time to burn up.

  Therefore, not only the inside of the aluminum sheet but also the outside member is made difficult to burn. As a result, the baking time is lengthened and the evacuation time is secured.

  Plastic fabric is a plain weave of plastic tape and is often used on the back of tatami mats. These include laminates of plastic films and metal foils, and even papers. Of course, anything can be used in the present invention. The reason for using these is to protect the back surface such as moisture proofing and strength retention, to prevent slippage when sewing a tatami mat with a machine, and to guide the flooring.

In the present invention, this is an essential component, but a cushion material may be provided anywhere on the front and back.
The cushion material imparts cushioning properties and may be basically any material, but a nonwoven fabric or cardboard is preferred. In particular, cardboard of about 0.8 to 2.0 mm is preferable. It may be a hemp sheet or pef used in the tatami mat industry.

Furthermore, in the present invention, as a special example, the structure described in claim 3 is suitable.
That is, the tatami mat, the aluminum sheet, the cushion material, the plastic cardboard, the wood fiber board, the plastic cardboard, the aluminum sheet, and the plastic fabric are laminated in this order from the top.

  In this example, plastic cardboard is used for both front and back. The thickness of the front side is a range selected from the strength to resist the tension of the tatami surface and the feel (elasticity) when standing on it, and is the result of various experiments. If the front side is too flexible, the feel of the thread sewn from the tatami surface will be transmitted to the foot, or it will be recessed locally, so a certain strength is required.

  The back side is preferably slightly softer and slightly thinner than the front side. Since the plastic cardboard is also provided on the back side, elasticity as a whole is given and the feeling when walking is like a conventional thick bed. Further, if the plastic corrugated board on the back side is soft, it can absorb the tension caused by the thread when sewing, and can prevent the tatami floor from being bent. The effect of this back surface is great because the front side cannot be made very flexible for the reasons described above.

  In addition, the components other than the tatami mat are sewn together. That is, they are sewn together without being individually glued or sewn. This is for the purpose of saving labor, the problem of volatilization of the solvent of the adhesive, and the prevention of the generation of toxic gas when burned.

In the present invention, as described above, two sheets of the front and back surfaces are indispensable as described above, but an aluminum sheet may also be attached to the side surface in order to make it more complete. Especially with thick tatami mats, the effect is great when applied to the side.
While preventing the combustion from a slight side, the effect of the heat transfer rate of the aluminum on the front and back is increased, and when one side is exposed to a flame, the other exhibits a heat dissipation effect.

  In the present invention, the tatami mat may have an edge or no edge, and its size and shape are also free.

The tatami mat of the present invention has the following great advantages.
(1) Since the aluminum sheet is fixed to the front side and the back side of the core material, the spread of fire can be blocked or delayed by this tatami mat.
(2) When the present tatami mat is used on the second floor, if there is a fire on the first floor or underground or under the floor, the spread of fire to the upper floor will be delayed. As a result, when a flame comes out from the bottom of the floor, it may be a difference between whether or not the residents on the floor are saved.
(3) If it is this invention tatami, since it can be processed with the conventional machine in the current tatami store, the tatami mat may be procured locally as a surface material and fixed.

It is a fragmentary sectional view which shows one example of this invention tatami. It is a fragmentary sectional view which shows the other example of this invention tatami.

Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.
FIG. 1 is a partial sectional view showing an example of the tatami mat 1 of the present invention.
Except for the tatami mat 2, the tatami floor is sewn together. In this tatami floor, in order from the top, a thick paper 3, which is a cushion material, an aluminum sheet 4, an insulation board 5, an aluminum sheet 4, and a plastic fabric 6 on which paper is laminated are laminated.

  In this example, the aluminum sheet (both front and back) has a thickness of 80 μm, the cardboard has a thickness of 1 mm, the insulation board has a thickness of 50 mm, the plastic fabric is a laminate of paper on a so-called PP cloth, and the thickness is 0 . About 2 mm was used. The entire floor is about 52 mm. If a tatami table is attached to this, it becomes a tatami mat of about 55 mm.

  This is completed by sewing a tatami mat (in the example of FIG. 1 woven with imitation rush made of thermoplastic resin).

  Actually, the tatami surface was burned by irradiating the tatami with the flame of the burner. However, since the aluminum sheet did not burn, the insulation board did not burn at all for a considerable time (20 minutes or more). Therefore, even if this tatami mat burns, if it is used in the upper and lower separate houses, for example, in a room on the second floor, the time for the first floor fire to spread to the second floor can be greatly extended.

FIG. 2 is a partial cross-sectional view showing another example of the tatami mat 1 according to the present invention.
Except for the tatami mat 2, the tatami floor is sewn together. In this tatami floor, an aluminum sheet 4, a cardboard 3, a plastic corrugated cardboard 7, an insulation board 5, a plastic corrugated cardboard 7, an aluminum sheet 4, and a plastic fabric 6 laminated with paper are laminated in order from the top.

  In this example, the aluminum sheet (front side) is 80 μm thick, the cardboard is 1 mm thick, the plastic cardboard (front side) is 2.5 mm thick, the insulation board is 7 mm thick, the plastic cardboard ( The back side was 1.5 mm thick, the aluminum sheet (back side) was 80 μm thick, and the plastic fabric was a paper laminate on a so-called PP cloth with a thickness of about 0.2 mm. The total floor is about 13 mm.

  This is completed by sewing a tatami mat (in the example of FIG. 2 woven imitation rush made of thermoplastic resin).

  Actually, this tatami mat was burned with a burner flame to burn the tatami surface. However, since the aluminum sheet did not burn, plastic cardboard and insulation board did not burn at all for a considerable time (20 minutes or more). Therefore, even if this tatami mat burns, if it is used in the upper and lower separate houses, for example, in a room on the second floor, the time for the first floor fire to spread to the second floor can be greatly extended.

1 This invention tatami 2 Tatami surface 3 Cushion material (cardboard)
4 Aluminum sheet 5 Insulation board 6 Plastic fabric laminated with paper 7 Plastic cardboard

Claims (4)

A fire-proof tatami covering the front and back of the core with aluminum sheets, providing a tatami mat on the front side and a plastic fabric on the back side, and sewn together except the tatami mat. The fire proof tatami mat according to claim 1, further comprising a cushion material. The fireproof tatami mat according to claim 2, comprising a tatami mat, an aluminum sheet, a cushion material, a plastic cardboard, a wood fiber board, a plastic cardboard, an aluminum sheet, and a plastic fabric in order from the top. The fireproof tatami mat according to any one of claims 1, 2, and 3, wherein the aluminum sheet is of a soft type and has a thickness of 50 µm or more.

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