JP2887673B1 - tatami - Google Patents

Abstract

Kind Code: A1 A thin and lightweight tatami mat is used without using rice straw or synthetic foam resin, and has excellent handleability without inferior rigidity, and is durable and excellent in durability. ,
A tatami mat that is free from pests is provided at low cost. SOLUTION: A waterproof material in which a urethane cushioning material 2 is put on a surface of a tatami mat 1 having a specific gravity of 0.34 on a front surface of a tatami mat, and a back surface of the tatami mat is reinforced with a cloth made of a polypropylene split yarn. The paper 3 is placed, and the paper 3 is sewn with a sewing machine using a normal tatami thread 4 made of polypropylene.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami floor made of Takasan (sorghum from China).

[0002]

2. Description of the Related Art Conventionally, rice straw has been used as a material for tatami floors. However, it has been difficult to obtain rice straw due to a change in the form of agriculture. As a countermeasure, various tatami mats using a material other than rice straw, such as synthetic resin foam, for part or all of the tatami floor have been proposed. For example, a styrene resin foam such as polystyrene is used as a base. A synthetic tatami mat such as a polystyrene foam sandwich tatami mat on which a natural straw material is laminated, or an insulation fiber board sandwich tatami mat having a fiber board (insulation fiber board, etc.) in which fibrous materials are gathered in place of the straw material. Is widespread.

[0003]

However, the tatami floors made of rice straw, however, tend to absorb moisture, making their waist weak or dents or dents when heavy objects are placed. However, there are drawbacks such as easy degradation of pests and pests. The fiberboard and the polystyrene resin foam are inferior in elasticity, resilience, impact resistance, feel, and the like to straw material, and cannot be used as a suitable product as a tatami floor by itself.

[0004] The standard specifications of current synthetic tatami floors include:
For example, a 25 mm polystyrene foam is sandwiched between insulation fiber boards of 15 mm and 10 mm, a 2 mm urethane cushion material is placed thereon, and the back side of the tatami mat is reinforced with a cloth made of an olefin-based split yarn. There is a type in which paper is placed and sewn with a tatami thread. In this case, the finished thickness of the tatami mat is 53 to 55 mm including the tatami mat. This finished thickness is adjusted to the dimensions of the rice straw tatami floor. If the rice straw tatami floor does not have this thickness, sufficient rigidity will not be obtained and the amount of deflection will be large, and handling will be poor. Is attributed to Therefore, it is possible to make the composite tatami floor thinner and easier to carry as long as the amount of bending does not hinder handling.

[0005] From such a viewpoint, the present inventor has studied various methods for reducing the thickness of the conventional synthetic tatami mat. However, simply reducing the thickness of the polystyrene foam or the insulation fiber board causes problems in the amount of bending and strength. If you try to make a tatami mat that is about half the thickness of the current tatami mats (20-30mm), you will need to reinforce it with 2-3mm plywood to make the tatami floor. It turned out to occur, and there was a problem that it was not inexpensive for a thinner device. In view of the above-mentioned problems of the prior art, the present invention does not use rice straw or a synthetic resin foam, and is thin, lightweight, inferior in rigidity, excellent in handleability, and excellent in moisture as compared with rice straw tatami mats. It is an object of the present invention to provide a tatami mat which is strong and durable and which is free from pests at low cost.

[0006]

Accordingly, the present inventor has developed an inexpensive, relatively light-weight material that is a natural material that is environmentally friendly, has moderate elasticity, has sufficient rigidity to be handled as a tatami mat. We searched and found that the above problem could be solved by making the tatami floor a Takashi board having a specific gravity of 0.38 or less, or a Takashi board in which a wood veneer was attached to one or both sides of the Takashi board.

[0007] Takasan is a plant cultivated for the purpose of using its nuts as food or feed for livestock, but its stems and leaves are partially returned to feed or fuel for livestock, and then returned to the fields or incinerated. I have. After compressing the stalks of the sorghum, it was impregnated with a preservative and dried, and was laid out vertically to form a single sashimi, and the adhesive was sprayed. Is Takasan board.

[0008] Takasan is the same annual plant as rice and is produced annually, so there is no problem of resource depletion. Also, since it is made of the same fibrous material as rice, it is broken down by microorganisms and returned to the soil even if discarded. It has properties. In addition, because it is a natural fiber material, it has a moderate hygroscopic property, and has a harder skin than rice straw, and has a small amount of bending even at about 20 mm, which is less than half that of rice straw when used on tatami floors. Is obtained. Further, there is an advantage that the surface of the tatami floor is smaller than the tatami floor of the rice straw, so that it is difficult to be a hotbed of insects such as mites.

[0009] The Takashi board is finished flat by shaving the surface irregularities with a planner. However, if a small gap between the stems of the sorghum or a slight dent on the surface is considered to be a problem, it is necessary to use a high sorghum board in which a very thin wooden veneer having a thickness of about 1 mm is attached to one or both surfaces. And a smooth surface state without any gaps can be obtained. The specific gravity of Takashi board is 0.3
The tatami floor of rice straw is JIS standard specific gravity 0.31-0.38, first grade 0.29-0.35, 2
Grade products 0.266 to 0.34, 3rd class products 0.24 to 0.31
The specific gravity of Takasago board is much larger than rice straw. If the thickness cannot be changed, such as when renewing an existing tatami mat, it is necessary to use a high sill board with a specific gravity of 0.38 or less to make the tatami mat the same weight as the tatami mat tatami mat of JIS standard. is there.

[0010]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a partially cutaway perspective view showing one embodiment of a Takasago board, FIG. 2 is a cross-sectional view of a tatami mat according to the present invention, FIG. 3 is a partially cutaway perspective view showing another embodiment of the Takasago board, and FIG. It is sectional drawing of the conventional synthetic tatami.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, reference numeral 1 denotes a sorghum board 1 having a thickness of 30 mm and a specific gravity of 0.34.
As shown in the figure, 2
mm of urethane cushioning material 2 is placed on the back side of the tatami mat, and a waterproof paper 3 reinforced with a cloth made of polypropylene split yarn is placed on the back side of the tatami mat. Manufactured by sewing. There was no particular problem in the work, there was no problem with the sewing machine being overwhelmed, and there was no problem with the needle passage. The tatami floor A of this example has a flexure amount of 0.2 mm in a bending test with a support point of 450 mm and a load of 60 kgf, and is JIS standard (JIS A59).
01-85) was equivalent to a special grade product with a tatami floor.
The tatami table 5 was placed on the tatami floor A, and a helicopter was placed thereon to sew the tatami mat to finish the tatami mat. There was no problem in the cutting of the end portion and no particular problem in the sewing operation. This tatami mat is about 18kg, about 2 tatami mats on a normal rice straw floor.
It weighed two-thirds of the weight of 8 kg and was almost the same weight as a polystyrene foam sandwich tatami mat.

The tatami mat of the Takasan board of the present embodiment has
The tatami mat of rice straw with a thickness of mm and the tatami floor of polystyrene foam and insulation fiberboard with a thickness of 50 mm have a hard feeling, and the tatami floor of Takasan board is slightly higher than the tatami floor with polystyrene foam and insulation fiberboard. It was soft but harder than the tatami floor of rice straw. When a slight gap between the stalks of the sorghum board 1 and a slight dent on the surface of the sorghum board 1 is regarded as a problem, as shown in FIG.
It is also possible to use a laminate of the main material veneers 1a and 1b which are very thin, each having a thickness of about m.

[0013]

The present invention is configured as described above.
Without using rice straw or synthetic resin foam, compared to rice straw tatami, it is thin and lightweight, has excellent rigidity, is easy to handle, is durable and durable, and produces pests. This has an excellent effect that a tatami mat without fear can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a Takagi board.

FIG. 2 is a sectional view of a tatami mat according to the present invention.

FIG. 3 is a partially cutaway perspective view showing another embodiment of the Takashi board.

FIG. 4 is a sectional view of a conventional synthetic tatami mat.

[Explanation of symbols]

 A Tatami floor 1 Takashi board 1a Wood veneer 1b Wood veneer 2 Cushion material (made of urethane) 3 Waterproof paper 4 Tatami thread 5 Tatami table

Claims (1)

(57) [Claims] The tatami mat is characterized in that the tatami floor is made of a high-risk board having a specific gravity of 0.38 or less, or a high-risk board in which a wood veneer is attached to one or both sides of the high-risk board.