JP2006077553A - Manufacturing method of thin tatami, and thin tatami - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a thin Tatami which simplifies manufacturing of the thin Tatami, has excellent safety since a tacker needle is not used, and prevents fray of an edge of a cut Tatami surface, and to provide the thin Tatami which is highly safe since the tacker needle is not used and eliminates the deviation of the rush of the edge of the cut part. <P>SOLUTION: A short-side end part 25 and a long-side end part 26 of the Tatami surface 22 face the lower surface of a corner C of a building material Tatami mat 20 comprising the thin Tatami, and intersect with each other. The rush of the short-side end part 25 and the long-side end part 26 around the part to be cut are bonded together to be unified using an instantaneous adhesive. The short-side end part 25 and the long-side end part 26 are cut to be diagonal to the end faces of the Tatami mat 20, respectively. Cut parts K1, K2 of the end parts are glued and fixed to the Tatami mat 20 using a non-instantaneous adhesive. The short-side end part 25 and the long-side end part 26 of the Tatami surface 22 are sawed to be fitted to the Tatami mat 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a thin tatami mat manufacturing method and thin tatami mat used for installation on a wooden floor of a house, a parlor or the like.

  Traditionally, the texture of tatami mats has been popular, and tatami mats have been installed on home floors, etc., or in exhibition halls and ryokan large halls, etc. Has been done. What is applied as a tatami floor of such a tatami mat or a laying tatami mat is usually a building material tatami floor whose size and shape are defined by Japanese Industrial Standards (JISA 5914).

  In addition, if a traditional building tatami floor with bundled natural cocoons as a core material is installed in a highly reinforced concrete building for a long period of time, moisture will accumulate in the core material, causing the occurrence of insects such as mites. Therefore, what has a core material which consists of a synthetic resin board which does not absorb moisture has spread widely in recent years.

  Since the thickness dimension of the building material tatami floor is about 5 to 6 cm, for example, when it is laid in a Japanese room adjacent to a living room or the like with a board floor, it is between the surface of the board floor and the tatami surface. A step of 5 to 6 cm is generated. For this reason, it is necessary to set the thickness dimension of the sill or rising ridge provided along the boundary between the planked floor and the Japanese-style room to 5 to 6 cm, and these sills or the rising ridge are walking for elderly people with disabilities or disabled persons. Become an obstacle.

  Therefore, a thin tatami mat has been proposed in which the core material can be thinned to suppress the overall thickness dimension of the building material tatami floor. In addition, a thin tatami mat means the thing whose thickness dimension of a building material tatami floor is 30 mm or less. Since such a thin tatami mat has a small thickness, it can meet the demand for barrier-free, and even during floor heating, since the thickness is thin, heat from the floor can be efficiently transferred to the tatami mat.

  By the way, in the thin tatami mat, as shown in FIG. 8, the end of the tatami table 22 is wound from the upper surface side to the lower surface side of the building material tatami floor 20 at both ends in one of the two orthogonal directions of the building material tatami floor 20. At the other end in one direction, the end of the tatami table 22 is wound from the upper surface side to the lower surface side of the building material tatami floor 20, and the end of the tatami table 22 is tatami yarn 30 with respect to the building material tatami floor 20. Some types are sewn.

  In this type of thin tatami mat, as shown in FIGS. 5 (a) and 5 (b), at the time of winding the tatami table 22, one end of two directions orthogonal to each other on the building material tatami floor 20 is provided. The end of the tatami table 22 on the A side (part with 25) and the other end of the tatami table 22 on the end side B in one direction (part with 26) are the corners C of the building material tatami floor 20. In the vicinity, intersect and overlap. FIGS. 5A and 5B show a state in which the end of the tatami table 22 on the end A side and the end of the tatami table 22 on the end B side intersect and overlap each other.

  Since the portions where the end portions of the tatami mat 22 intersect each other are thicker than the other portions that do not intersect in the thickness direction of the building material tatami floor 20, as shown in FIG. In the crossing site | part, it cut | disconnects on the virtual line D which passes the corner | angular part C of the building material tatami floor 20, and the edge parts of the tatami surface 22 do not cross | intersect.

  However, conventionally, there has been a problem in that the natural grass woven together with hemp yarn and cotton yarn is unraveled so as to constitute the tatami surface at the site cut as described above. This is because the binding force is lost at the site where the hemp yarn or cotton yarn that has restrained natural grass is cut. In order to prevent this unraveling, it is conceivable to use a tucker to drive the tucker needle so that the natural grass at the cut site cannot be unraveled. However, when a tucker is used, there is a problem that it takes time to manufacture a thin tatami mat. In addition, there is a problem that the tucker needle is likely to come off, and the tucker needle is driven upward from the lower surface of the thin tatami mat. Therefore, when using the thin tatami mat, the tip of the tucker needle may protrude from the upper surface of the tatami mat surface.

  An object of the present invention is to manufacture a thin tatami mat, which is easy to manufacture, and does not use a tucker needle, so that it is highly safe and can prevent the weeds from being cut off at the end of the cut tatami surface, and An object of the present invention is to provide a thin tatami mat that has high safety and does not unravel the cutting site at the end portion because no tacker needle is used.

  In order to solve the above problems, the invention of claim 1 wraps a tatami table around each end of the tatami floor and attaches each end of the tatami table to the lower surface of each end of the tatami floor. A step for preventing unraveling by combining and integrating the weeds in the peripheral part of the planned cut portion provided at the part intersecting with each other at each end of the tatami surface attached to the lower surface of the corner part of the tatami floor; Cutting the planned cut portions at the respective ends of the tatami mat, and fixing the cut portions cut at the respective ends to the tatami floor with an adhesive, and then attaching the ends of the tatami mat to the tatami mat. The gist of the present invention is a thin tatami mat manufacturing method comprising a step of sewing on a floor. In the present specification, the simple term “weed” includes natural grass and artificial grass.

According to a second aspect of the present invention, in the first aspect, each cut portion of the tatami surface is cut so as to be inclined with respect to the end surface of the tatami floor.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the weed prevention step is characterized in that the weeds in the peripheral portion of the part to be cut are joined and integrated with the instantaneous adhesive.

  According to a fourth aspect of the present invention, in the first or second aspect, the tatami mat is formed of artificial grass made of a heat-welding synthetic resin. It is characterized by being integrated by solidification after heating and melting.

  In the invention of claim 5, the tatami mat is wound around the end of the tatami floor, the end of the tatami mat is attached to the lower surface of the end of the tatami floor, and corresponds to the lower surface of the corner of the tatami floor. The respective ends of the tatami mat are cut so as not to cross each other, and the cut cutting sites at the respective ends are integrated by an integration means for joining the grasses together, and the ends of the tatami mat are combined with each other. The gist of the present invention is a thin tatami mat that is sewn to the tatami floor.

  According to the first aspect of the present invention, it is easy to manufacture a thin tatami mat, and since a tucker needle is not used, the safety is high, and furthermore, it is possible to prevent the cleavage site cut obliquely at the end of the tatami surface from being unraveled. .

According to invention of Claim 2, it can cut | disconnect easily so that the edge parts of the tatami surface corresponding to the lower surface of the corner | angular part of a tatami floor may not mutually cross.
According to the invention of claim 3, in the unraveling prevention step, it is possible to easily prevent the unraveling of the cutting site by combining and integrating the weeds around the site to be cut with the instantaneous adhesive.

  According to the invention of claim 4, in the unraveling prevention step, the artificial weeds around the part to be cut are heated and melted, and then solidified to be integrated, so that the unraveling of the cutting site can be easily prevented.

  Since the thin tatami of Claim 5 does not use a tucker needle, it has high safety and has the effect that the cutting site at the end is not unraveled.

Hereinafter, the manufacturing method of the thin tatami 10 which actualized this invention, and one Embodiment of the thin tatami 10 are described according to FIGS.
First, the outline of the thin tatami mat 10 of the present embodiment will be described. As shown in FIG. 10, the thin tatami mat 10 is a building material tatami floor 20 and a tatami table 22 wound around and attached to the building material tatami floor 20. It has. FIG. 10 is a perspective view of the thin tatami mat 10 as viewed from below.

A method for manufacturing the thin tatami mat 10 will be described below.
As shown in FIG. 1, the building material tatami floor 20 includes a protective paper 11, an upper plastic corrugated board 12, an insulation board 13, a lower plastic corrugated board 14, and a back sheet 15 which are laminated in order from the top. In this embodiment, the thickness of the thin tatami mat 10 is 15 mm, and the thickness of the building material tatami floor 20 is a value obtained by subtracting the thickness of the tatami mat 22 from the thickness of the thin tatami mat 10. The thin tatami mat 10 may have a thickness of 25 mm, 20 mm, or less.

  In a state in which the members constituting the building material tatami floor 20 are laminated as described above, the members are sewn and joined with the tatami yarn 24 using a tatami sewing machine or the like along the longitudinal direction (see FIG. 1). The protective paper 11 reduces friction between the tatami mat 22 and the plastic corrugated board 12 at the end of the building material tatami floor 20 and prevents the tatami mat 22 from being worn out. Examples of the protective paper 11 include calcium carbonate-containing paper and extruded expanded polystyrene paper, but any paper that does not deform in shape when dried at normal temperature and in a moisture state may be used.

  The plastic corrugated boards 12 and 14 are made of a plate material having a relatively high compressive strength having an independent sealed air chamber formed by attaching a synthetic resin liner to one or both surfaces of a synthetic resin core formed in a corrugated shape. . However, the configuration is not limited to this, and any commercially available product may be used.

  The insulation board 13 may be a plate material having a flexural rigidity equal to or higher than that of a building material tatami floor (JIS A5914), but may be any one that does not undergo shape deformation in a dry and humid state at room temperature. Examples of the back sheet 15 include a synthetic resin sheet such as a polypropylene sheet material. The back sheet 15 is preferably made of a material that does not undergo shape deformation when dried at room temperature and in a moisture state. The back sheet 15 prevents the thin tatami 10 from warping.

  In the present embodiment, the protective material 11 and the back sheet 15 are omitted from the building material tatami floor 20 (upper plastic corrugated board 12, insulation board 13, and lower plastic corrugated board 14). It is configured as.

  Next, the size of the building material tatami floor 20 is cut so as to be a square shape for one tatami mat according to the layout of the house. Subsequently, as shown in FIG. 2, the building material tatami floor 20 is placed on the tatami table 22. The tatami mat 22 is formed in a size so that it can be wound around the building material tatami floor 20. And as shown in FIG. 2, the double-sided tape 16 is stuck as a temporary fixing tape along each side of the lower surface of the building material tatami floor 20. FIG. 2 is a perspective view of the building material tatami floor 20 as viewed from the lower surface side.

  And as shown to Fig.3 (a), a pair of short side edge part 25 which is the both ends of the longitudinal direction of the tatami surface 22 is each wound around the building material tatami floor 20 (FIG.3 (b), FIG.3 (c)). )), And is attached to the lower surface of the building material tatami floor 20 via the double-sided tape 16 (see FIG. 4A and FIG. 4B).

  And the adhesive tape 27 is stuck on the short side edge part 25 of the tatami mat 22 wound around the building material tatami floor 20, and the lower surface of the building material tatami floor 20 (refer FIG.4 (b)). In addition, the adhesive tape 27 sticks the short side edge part 25 with respect to the building material tatami floor 20 as needed, and is temporarily fixed with respect to the building material tatami floor 20 of the short side edge part 25 with the double-sided tape 16. Can be omitted, the step of attaching the adhesive tape 27 may be omitted.

  Next, as shown to Fig.3 (a), in the short side edge part 25 of the tatami surface 22 arrange | positioned facing the end surface 20a of the building material tatami floor 20, site | part (alpha) (hatching) which adjoins the long side edge surface 20b The instantaneous adhesive as an integration means is applied to the part indicated by. Moreover, in the short side edge part 25 of the tatami surface 22 arrange | positioned in the lower surface of the building material tatami floor 20, with respect to site | part (beta) (part shown by hatching) which adjoins the virtual line D which passes the corner | angular part C of the building material tatami floor 20 Then, an instantaneous adhesive as an integration means is applied, and the same part is integrated with the adhesive. Thus, the step of applying and solidifying the instantaneous adhesive corresponds to the step of preventing the unraveling.

  In the short side end 25 and the long side end 26 of the tatami mat 22, the part on the imaginary line D corresponds to the part to be cut. By the instant adhesive, the natural grasses of the parts α and β are integrated in a short time, and when the short side end 25 is cut along the virtual line D and the like later, Can prevent the grass from unraveling. As the instantaneous adhesive, a cyanoacrylate-based adhesive can be used, and an instantaneous adhesive to which a thickener is added is particularly preferable. By using this type of adhesive, plant fibers and porous materials can be used. Adheres strongly and quickly.

  Next, as shown to Fig.4 (a), from the edge of the short side edge part 25, a cut is made so that the end surface 20b of the long side of the building material tatami floor 20 may be met, and a short edge part A part of 25 is cut off. The cut amount of the cut corresponds to the sum of the height of the end surface 20a (the thickness of the building material tatami floor 20) and the length wound around the lower surface of the building material tatami floor 20.

  Next, along the virtual line D, the end of the short side end 25 located at the corner of the lower surface of the building material tatami floor 20 is cut, and the triangular piece 25a shown in FIG. Subsequently, water vapor is blown onto the lower surface (back surface) of the long side end portion 26 of the tatami mat 22 to moisten it appropriately. Subsequently, in the lower surface (back surface) of the long side end portion 26 of the tatami mat 22, the portion along the end surface 20 b extending in the longitudinal direction of the building material tatami floor 20 (the hatched portion P in FIG. 4A) is not cut. Make a streak with a jig. By blowing the water vapor, the natural grass extending in the short direction of the tatami surface 22 becomes soft and the long side end 26 is easily bent, and the long side end 26 is wound around the tatami mat floor 20. When doing so, the folding surface 22 (natural grass) is prevented from being broken.

  Subsequently, a pair of long side end portions 26 which are both ends in the short direction of the tatami surface 22 are respectively wound around the building material tatami floor 20 and attached to the lower surface of the building material tatami floor 20 via the double-faced tape 16 ( FIG. 5 (a) and FIG. 5 (b)). And the adhesive tape 28 is stuck on the long side edge part 26 of the tatami mat 22 wound around the building material tatami floor 20, and the lower surface of the building material tatami floor 20 (refer FIG. 6). In addition, the adhesive tape 28 sticks the long side side edge part 26 with respect to the building material tatami floor 20 as needed, and is temporarily fixed with respect to the building material tatami floor 20 of the long side edge part 26 with the double-sided tape 16. Can be omitted, the step of attaching the adhesive tape 28 may be omitted.

  Next, as shown to Fig.5 (a), in the long side edge part 26 of the tatami mat 22 arrange | positioned facing the end surface 20b of the building material tatami floor 20, site | part ε (hatching) which adjoins the end surface 20a of a short side In the same manner as the part α, an instantaneous adhesive as an integration means is applied to the part indicated by. Next, as shown to Fig.5 (a), in the long side edge part 26 of the tatami surface 22 arrange | positioned at the lower surface of the building material tatami floor 20, it adjoins to the virtual line D which passes the corner | angular part C of the building material tatami floor 20 The instant adhesive as an integration means is applied to the part γ (the part indicated by hatching) to be performed in the same manner as the part β. By the instant adhesive, the natural grasses of the parts γ and ε are integrated in a short time, and when the long side end 26 is cut along the virtual line D and the like later, Can prevent the grass from unraveling. Thus, the step of applying and solidifying the instantaneous adhesive corresponds to the step of preventing the unraveling.

  Here, as shown to Fig.5 (a), at the time of winding of the tatami surface 22, the edge part of one direction (longitudinal direction) of the two orthogonal directions (longitudinal direction and short direction) in the building material tatami floor 20 The side 25 of the short side and the end 26 of the long side, which is the end of the other one direction (short direction), intersect and overlap each other in the vicinity of the corner C of the building material tatami floor 20. Yes.

  Therefore, as shown in FIG. 6, the portions of the end portions of the tatami mat 22 that intersect each other are cut (cut) on a virtual line D that passes through the corner portion C of the building material tatami floor 20. Since the virtual line D extends so as to be inclined with respect to the end surfaces 20a, 20b orthogonal to each other of the building material tatami floor 20, the short side end 25 and the long side end 26 are the building material tatami floor. The 20 end faces 20a and 20b orthogonal to each other are cut so as to be inclined.

  At the time of the cutting, the natural grass in the peripheral parts including the cut parts K1 and K2 cut obliquely are integrated and bonded to each other using the instant adhesive. By using this instant adhesive, the peripheral parts β and γ including the oblique cut parts K1 and K2 are integrated in a short time, and the natural grass at the cut parts K1 and K2 is prevented from being released. it can. In addition, the parts α and ε can be bonded and fixed to the building material tatami floor 20 in a short time, and the natural grass at the parts can be prevented from being unwound.

  Next, a non-instant adhesive is applied to a range including a portion where the instantaneous adhesive is applied. The non-instant adhesive is not limited as long as it adheres natural grass (plant fiber) constituting the tatami mat 22 and the building material tatami floor 20, but a hot melt adhesive is preferable. Examples of the hot melt adhesive include EVA hot melt adhesives, polyamide hot melt adhesives, polyester hot melt adhesives, thermoplastic rubber hot melt adhesives, and the like. Here, the non-instant adhesive means an adhesive that requires a longer bonding time than the instantaneous adhesive. The hot melt adhesive is preferable because it can be heated and melted after being applied to the site where the adhesive is bonded, and can penetrate into the bonded site at the end of the tatami mat 22 and has a strong adhesive force after cooling.

  After bonding the cutting sites K1 and K2 with a non-instant adhesive, the adhesive tapes 27 and 28 are peeled off, and each end of the tatami table 22 wound around the building material tatami floor 20 with tatami yarn 30 as shown in FIG. The building material tatami floor 20 is sewn.

Now, according to the present embodiment, there are the following features.
(1) In the thin tatami mat 10 of this embodiment, in the vicinity of the corner C of the building material tatami floor 20, the peripheral portions α, β, γ, ε around the cut portions K1, K2, etc. of the tatami surface 22 are non-instant adhesives. Therefore, when the thin tatami mat 10 is manufactured, the natural grass of the parts α, β, γ, ε is not unraveled.

  (2) In the present embodiment, the short side end 25 and the long side end 26 of the tatami mat 22 are wound around the end of the building material tatami floor 20 and correspond to the corner C of the building tatami floor 20. At each end of the tatami mat 22, the natural weeds of the parts α, β, γ, ε around the planned cut portion of the tatami mat 22 were previously integrated with an instantaneous adhesive. And it is diagonal with respect to the end surface of the building material tatami floor 20 so that the short side edge part 25 and the long side edge part 26 of the tatami surface 22 corresponding to the lower surface of the corner part C of the building material tatami floor 20 do not cross each other. Each was cut to be. At the time of this cutting, the natural grass in the vicinity of the cutting sites K1 and K2 is integrated by the instantaneous adhesive and therefore cannot be unraveled.

  Then, the parts β and γ were further bonded and fixed to the building material tatami floor 20 with a non-instant adhesive. Thereafter, the short side end 25 and the long side end 26 of the tatami mat 22 are sewn to the building material tatami floor 20. As a result, it is easy to manufacture the thin tatami mat 10 because no tucker is used, and because it does not use a tucker needle, it is highly safe and prevents the cut portions K1 and K2 of the tatami table 22 from being cut obliquely. The thin tatami mat 10 can be easily obtained.

  (3) In this embodiment, after using the instantaneous adhesive, in order to further bond the short side end 25 and the long side end 26 to the building material tatami floor 20 with the non-instant adhesive, Generation | occurrence | production of the cutting | disconnection site | part K1, K2 of the short side edge part 25 and the long side edge part 26 can be prevented more reliably.

  (4) Since the thin tatami mat 10 obtained by the manufacturing method of the present embodiment does not use a tucker needle, it has high safety and has an effect that the cutting sites K1 and K2 are not unraveled.

In addition, this invention is not limited to the said embodiment, You may change as follows.
In the above embodiment, a thin tatami core is obtained by omitting the protective paper 11 and the back sheet 15 from the building material tatami floor 20 (upper plastic corrugated board 12, insulation board 13, and lower plastic corrugated board 14). It is configured as a material. As the core material for thin tatami mats, any one of the insulation board 13 (JIS A 5905), the plastic corrugated board 12, 14, and the synthetic resin foam 9 formed by molding foamed urethane, foamed polystyrene or the like into a plate shape. Alternatively, two or more of the insulation board 13, the plastic corrugated board 12, 14 and the synthetic resin foam 9 may be laminated. It is preferable that the building material tatami floor composed of the core material for thin tatami mats and the protective paper 11 and the back sheet 15 does not undergo shape deformation in a dry and humid state at normal temperature.

  As shown in FIGS. 9 and 10, an adhesive tape 32 may be attached so as to cover a portion bonded with the instantaneous adhesive and the non-instant adhesive. If it does in this way, the site | part adhere | attached with the adhesive agent can be covered with the adhesive tape 32, and it can prevent more reliably the natural grass in the cutting | disconnection site | part of the edge part of the tatami surface 22 more reliably.

  In the above embodiment, the tatami table 22 is made of natural grass, but instead of the natural grass, the tatami table 22 can be made of thin pipe-shaped artificial grass made of polyester resin as a heat-welding synthetic resin. . Synthetic resin is not limited to polyester fiber, and artificial grass may be composed of other synthetic resin as long as it has heat applicability. In this case, instead of using the instantaneous adhesive, the parts α, β, γ, ε around the portion to be cut of the tatami mat 22 near the corner C of the building material tatami floor 20 are ironed or soldered. By heating, the artificial grass around the part to be cut is melted and then solidified and integrated with each other. In the present embodiment, a heat-weldable synthetic resin (artificial grass) that is heated and melted by a heating means such as an iron or a soldering iron corresponds to the integration means.

  According to the present embodiment, since the artificial grass of the part can be integrated with each other only by applying heat to the parts α, β, γ, ε around the part to be cut of the tatami table 22, It is possible to reliably prevent the artificial weeds from unraveling the surrounding parts α, β, γ, ε, such as K1, K2. Further, it is not necessary to bond with an instantaneous adhesive, and the cost can be reduced.

In the above embodiment, the thin tatami mat has a size of one tatami mat, but is not limited to the size, and may be, for example, a half tatami mat size.
Below, the technical idea grasped | ascertained from the said embodiment other than the claim described in the claim is described.

  (1) The thin tatami mat according to claim 5, wherein each cut portion of the tatami surface is cut so as to be inclined with respect to an end surface of the tatami floor. If it carries out like this, it can cut | disconnect easily so that the edge parts of the tatami surface corresponding to the lower surface of the corner | angular part of a tatami floor may not mutually cross | intersect.

The perspective view of a building material tatami floor. The perspective view of the building material tatami floor which shows 1 process of the manufacturing method of a thin tatami. (A) is a perspective view of a building material tatami floor, (b) is principal part sectional drawing, (c) is principal part sectional drawing similarly. (A) is a perspective view of a building material tatami floor, (b) is principal part sectional drawing. (A) is a perspective view of a building material tatami floor, (b) is a principal part side view. (A) is a bottom view of a thin tatami mat showing one step of the method of manufacturing the thin tatami mat, (b) is a side view of the main part. The bottom view of the thin tatami which shows 1 process of the manufacturing method of a thin tatami. The bottom view of the thin tatami which shows 1 process of the manufacturing method of a thin tatami. The bottom view of the thin tatami which shows 1 process of the manufacturing method of a thin tatami. The perspective view which looked at the thin tatami 10 from the lower surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Thin tatami 20 ... Building material tatami floor 20a, 20b ... End surface 22 ... Tatami surface 25 ... Short side edge 26 ... Long side edge C ... Corner K1, K2 ... Cutting site

Claims (5)

Winding a tatami table around each end of the tatami floor and attaching each end of the tatami mat to the lower surface of each end of the tatami floor;
At each end of the tatami mat attached to the lower surface of the corner of the tatami floor, a step for preventing unraveling by combining and integrating the weeds of the peripheral part of the part to be cut provided in the part intersecting with each other;
Cutting the cut planned portion at each end of the tatami mat;
A thin tatami mat manufacturing method comprising a step of sewing and fixing the end portion of the tatami mat to the tatami floor after the cut portion cut at each end portion is bonded and fixed to the tatami floor with an adhesive. Method.   The method for producing a thin tatami mat according to claim 1, wherein each cut portion of the tatami surface is cut so as to be inclined with respect to an end surface of the tatami floor.   The method for producing a thin tatami mat according to claim 1 or 2, wherein in the step of preventing the unraveling, the weeds in the peripheral part of the part to be cut are joined and integrated with an instantaneous adhesive. The tatami mat is formed of artificial grass made of heat-welding synthetic resin,
The method for producing a thin tatami mat according to claim 1 or 2, wherein in the step of preventing the unraveling, the artificial weeds around the portion to be cut are fused by heating and then solidified.   A tatami mat is wound around the end of the tatami floor, the end of the tatami mat is attached to the lower surface of the end of the tatami floor, and each end of the tatami mat corresponding to the lower surface of the corner of the tatami floor Are cut so as not to cross each other, and the cut sections cut at the ends are integrated by an integration means for joining the grasses together, and the ends of the tatami mat are sewn to the tatami floor. Thin tatami mats characterized by

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