JPH0355696Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a synthetic tatami mat having foamed plastic as a tatami floor.More specifically, the invention relates to a synthetic tatami mat having foamed plastic as a tatami floor. This invention relates to a synthetic tatami mat which is prevented from losing its shape at the corners of the tatami surface.

Technical background of the invention and its problems In Japan, tatami mats have been popular as a flooring material since ancient times. The main body of a tatami is made up of a tatami bed and a tatami mat. Since ancient times, the tatami bed has been made of straw pierced with thread, and the tatami mat has been made of rush stems woven with hemp thread. It is used.

However, synthetic tatami mats that do not use straw have become popular in recent years due to reasons such as the price of straw or rushes rising or fluctuating from year to year, or due to a decline in the number of tatami craftsmen. It has come to be widely used. As the tatami floor in such synthetic tatami mats, foamed plastic such as foamed polystyrene is used in combination with a soft wood wool board made of hardened wood chips called an insulation board, if necessary.

The tatami floor of the synthetic tatami mats mentioned above has a low moisture absorption rate and excellent heat insulation properties, so it can be laid directly on a concrete floor, and it has excellent compressive strength, so it can be used for a long time. It has excellent performance in that it does not deteriorate, and there is no fear of pests such as mites or corrosion. Furthermore, a tatami floor constructed by laminating a soft wood wool board and a foamed plastic tatami floor so as to be positioned on the front side of the tatami mat on the surface of the soft wood wool board also has appropriate moisture absorption and desorption properties.

However, as shown in Fig. 4a, the sides of the tatami floor 1 made of the above-described foamed plastic 2 and soft wood wool board 3 and the tatami face 4 are sewn together so that the foamed plastic 2 is located at the bottom of the tatami. When the tatami mat is sewn together with the thread 5 and used for a long period of time, the sewing thread 5 may be pulled in the direction of the arrow, and the sewing thread 5 may be displaced in the direction of the arrow within the foamed plastic 2. . If the sewing thread 5 becomes misaligned within the foamed plastic 2, the foamed plastic 2 will be damaged in the form of large tears, making it impossible to use the tatami floor repeatedly, and the sewing thread may become loose, which is a serious problem. A problem had arisen.

In order to solve these problems, conventionally,
As shown in FIG. 4b, a groove is formed in the bottom of the foamed plastic 2 that is the tatami floor, a frame 6 made of plywood or the like is inserted into this groove, and the frame 6 is attached to the foamed plastic 2 with adhesive. It was attached to the bottom of the.
However, with this method, a groove is formed in the bottom of the plastic foam 2, or a veneer plywood frame is prepared, inserted into the groove, and attached to the plastic foam 2 with adhesive. This was time-consuming and led to an increase in costs.

Furthermore, when the above synthetic tatami mats are used for a long period of time, the corners of the tatami surface sometimes lose their shape. In order to prevent such synthetic tatami mats from deforming, conventional corner materials have been used at the corners of the tatami surface, consisting of a side wall and an upper wall that stands up from the side wall at an angle of less than 90 degrees. I've been exposed to it. This corner material to prevent deformation is effective in preventing the synthetic tatami surface from deforming, but it is of no use in preventing the aforementioned sewing thread from slipping within the foam plastic. Ta.

Purpose of the invention The present invention is an attempt to solve the problems associated with the conventional technology as described above. To provide a synthetic tatami mat in which the sewing threads do not shift and the surface of the synthetic tatami mat does not lose its shape.

Summary of the invention The synthetic tatami according to the invention consists of a tatami surface and a tatami bed, and the bottom of the tatami bed is made of foamed plastic. It consists of a bottom wall that stands up at an angle of 90 degrees or more from one end of the side wall, and an upper wall that stands up in the same direction as the bottom wall at an angle of less than 90 degrees from the other end of the side wall, and has a tatami seam. A corner material made of synthetic resin or paper that is thick enough to be penetrated by a needle is attached from the side to the bottom and top of the tatami floor.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and the same members as those shown in FIG. 4 are given the same reference numerals.

The synthetic tatami mat according to the present invention has a tatami floor 1, a tatami face 4, and a corner material 7. The upper surface of the soft wood wool board 3 is placed in contact with the tatami facing 4. This tatami floor 1 has, from the side to the bottom and top,
A corner material 7 is attached.

The corner material 7 is made of synthetic resin or paper, and as shown in FIG. The bottom wall 7b stands up at an angle α of 90 degrees or more, preferably 90 to 120 degrees, more preferably 95 to 105 degrees, and the bottom wall 7b rises at an angle α of 90 degrees or more, preferably 90 to 120 degrees, and more preferably less than 90 degrees, more preferably 70 to 90 degrees, from the other end of the side wall 7a. It is formed of an upper wall 7c that stands up in the same direction as the bottom wall 7b, forming an angle β of 75 to 85 degrees. In addition, 8 in the figure is a reinforcing rib of the corner material 7. If the angle α between the side wall 7a and the bottom wall 7b is less than 90 degrees, it will be difficult to attach the corner material 7 to the tatami floor, and the corner material 7 will be attached to the tatami floor 1 by sewing thread.
This is not preferable because the corner material 7 is likely to be destroyed after being sewn to the corner material 7. On the other hand, if the angle β between the side wall 7a and the top wall 7c is 90 degrees or more, it will not be possible to sufficiently prevent the corners of the tatami surface from losing their shape, and after the corner material 7 is sewn to the tatami floor 1. This is not preferable because the corner material 7 is likely to be destroyed. As shown in FIG. 2, the bottom wall 7a of the corner material
and the side wall 7a so that an angle α of 90 degrees or more is formed. Therefore, when this corner material is attached to a tatami mat as shown in FIG. 1 or 3, the side wall 7a of this corner material is urged away from the side surface of the tatami mat. As a result, a biasing force acts on the tatami facing 4 that extends to the outside of this corner material, thereby making it possible to tension the tatami facing 4 without loosening.

This corner material 7 is sewn to the foamed plastic 2 and the tatami facing 4, which are the tatami flooring, using sewing threads 5. In this way, the corner material 7 is sewn to the tatami floor 1 and the tatami facing 4 using the sewing thread 5. Generally, the sewing thread 5 is used to sew the corner material 7 to the tatami mat sewing needle (not shown) of the floor making machine. ), tatami floor 1, tatami surface 4 and corner material 7
This is done by penetrating the Therefore, in order to enable sewing with the tatami sewing needle as described above, it is preferable that the corner material 7 has a thickness such that the tatami sewing needle can penetrate through it.

The corner material 7 is preferably made of synthetic resin as described above, but specifically, it is made of polyvinyl chloride,
Preferably, it is formed from a thermoplastic resin such as polystyrene by extrusion molding.
In particular, polyvinyl chloride is preferable in consideration of strength and cost. When the corner material 7 is made of polyvinyl chloride, the thickness of this corner material 7 is 0.1
-3.0 mm, preferably 0.5-1.0 mm.

Further, this corner material 7 can also be formed of a material other than synthetic resin. Examples of such materials include laminates formed by laminating paper and plastic, and even paper impregnated with plastic to give it rigidity.
It can be formed into a corner material by a method such as pressing or hot pressing. When this paper is used as a material, the thickness of the corner material is preferably about 0.1 to 3.0 mm, preferably about 0.5 to 1.0 mm.

As mentioned above, this corner member 7 is formed from the side wall 7a, the bottom wall 7b, and the top wall 7c.
This side wall 7a has a length approximately corresponding to the thickness of the tatami floor, specifically 30 to 70 mm, preferably 50 mm.
Often ~60mm. Moreover, it is preferable that this bottom wall 7b is specifically about 30 to 60 mm,
The upper wall 7c is preferably 15 mm or more, preferably about 20 to 30 mm. Furthermore, the side wall 7 of the corner material 7
Ribs 8 as shown in FIG. 2 may be provided on the outer peripheral walls of the bottom wall 7b and the top wall 7c.

By attaching such a corner material 7 to the tatami floor 1, the sewing thread 5 is completely prevented from shifting in the foamed plastic 2 that is the tatami floor, and therefore the foamed plastic 2 is sewn. The foamed plastic 2 can be used repeatedly without being damaged by the thread 5, and the sewing thread 5 can be completely prevented from loosening. Moreover, the surface corners of the synthetic tatami mat will not lose their shape.

Furthermore, since the corner material 7 is thick enough to be penetrated by a tatami mat sewing needle, it can be efficiently manufactured in large quantities by the synthetic tatami floor making machine according to the present invention.

On the other hand, foamed plastic 2, which is a tatami floor,
Specifically, expanded polystyrene, expanded polyethylene,
Conventionally known materials such as foamed polyvinyl chloride are widely used, but among these, foamed polystyrene is particularly preferred, and foamed polystyrene produced by either an extrusion method or a bead method can be used. In addition, the soft wood wool board 3, which is a tatami floor,
As mentioned above, it is made of hardened wood chips.

The thickness of this tatami floor 1 can vary widely as desired, but is generally 30 to 70 mm, preferably 50 to 60 mm. In such a case, the thickness of the foamed plastic 2 is preferably about 20 to 50 mm, and the thickness of the soft wood wool board is preferably about 10 to 30 mm.

When a tatami floor made of foamed plastic 2 such as foamed polystyrene and soft wood wool board 3 is used, as mentioned above, it has excellent heat insulation properties, so it can be laid directly on a concrete floor and can be used for a long period of time. It is possible to obtain a tatami floor that does not deteriorate even when exposed to water, has no fear of pest infestation or corrosion, and has appropriate moisture absorption and desorption properties.

As the tatami cover 4, either a synthetic tatami cover made of synthetic resin or a tatami cover made of rush stems woven with hemp thread can be used.

Furthermore, the present invention is not limited to the above-described embodiment, but may also be an embodiment as shown in FIG. That is, in the synthetic tatami according to the present invention, the tatami floor 1 may be entirely formed of foamed plastic 2. The synthetic tatami according to the present invention is of a type in which the bottom of the tatami floor 1 is made of foamed plastic 2.

In addition, in the present invention, a back sheet (not shown) can be further provided at the bottom of the tatami floor 1.

Effects of the invention In the synthetic tatami mat according to the invention, corner materials as described above are attached from the sides of the tatami floor to the bottom and top surfaces, so the sewing threads are completely prevented from shifting in the foamed plastic. Therefore, no damage is caused to the foamed plastic sewing thread, and the loosening of the sewing thread is completely prevented. Therefore, the tatami floor can be used repeatedly and the tatami floor has an excellent appearance. Moreover, deformation of the surface corners of the synthetic tatami mat is completely prevented.

Furthermore, since the thickness of the corner material is such that a tatami mat sewing needle can pass through it, it can be efficiently manufactured using a floor making machine without much effort. The angle between the bottom wall of the corner material and the side wall is 90 degrees or more. Therefore, when this corner material is attached to a tatami mat, the side wall of this corner material is urged away from the side surface of the tatami mat. As a result, a biasing force acts on the tatami facing that extends to the outside of this corner material, thereby making it possible to tension the tatami facing without loosening.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of the synthetic tatami mat according to the present invention, Fig. 2 is a cross-sectional view showing an example of the corner material used in the present invention, and Fig. 3 is a cross-sectional view showing another embodiment of the present invention. FIG. 4 is a sectional view of a main part of a conventional synthetic tatami mat. 1... Tatami floor, 2... Foamed plastic, 3...
Soft wood wool board, 4...Tatami surface, 5...Sewing thread, 7...
Corner material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A synthetic tatami mat consisting of a tatami face and a tatami bed, with the bottom of the tatami bed made of foamed plastic,
A side wall having a length approximately corresponding to the thickness of the tatami floor, a bottom wall rising from one end of this side wall at an angle of 90 degrees or more, and a bottom wall rising from the other end of this side wall at an angle of less than 90 degrees. The corner material is made of synthetic resin or paper, which consists of a bottom wall and a top wall rising in the same direction, and has a thickness such that a tatami sewing needle can penetrate it, that is, a thickness of 0.1 to 3.0 mm. A synthetic tatami mat characterized by being integrally sewn to the tatami face and the bottom of the tatami bed using sewing threads and attached from the sides to the bottom and top of the tatami bed. (2) Utility model registration claim 1 characterized in that the foamed plastic is foamed polystyrene
Synthetic tatami as described in section. (3) The corner material is made of polyvinyl chloride,
The synthetic tatami according to claim 1, which has a thickness of 0.5 to 1.0 mm. (4) The corner material is made of a laminate of paper and synthetic resin or paper impregnated with synthetic resin, and
The synthetic tatami according to claim 1, which is characterized by having a thickness of 1.0 mm. (5) Utility model registration claim No. 1 characterized in that the side wall and bottom wall of the corner material form an angle of 95 to 105 degrees, and the side wall and top wall form an angle of 75 to 85 degrees. The synthetic tatami mat described in item 1.