Tatami floor

Abstract

We offer durable tatami mats that are wheelchair accessible, and that can also be used in an exposed state, adding new functionality to the tatami. [Solution] Due to insufficient strength on the sides, the tatami floor could only be installed by replacing existing tatami mats. However, by adding and / or processing reinforcing materials to all or part of the surface sheet material, tatami base, and subfloor, it has been devised that it can be used as a portable tatami mat and that new functionality can be added. Simply making it usable as a portable tatami mat will not be enough to expand demand, so differentiation is key to expanding sales channels. It is also possible to incorporate a heating element 13 and provide a storage section 9, and it can be used as a soundproofing material 19 or sound absorbing material 20, and it can also be assembled in three dimensions. By making the most of the functionality of tatami and adding new functionality, it is possible to establish new ways of use.

Description

Technical Field

[0001] The present invention relates to a tatami floor.

Background Art

[0002] The tatami floor 1 is known from Patent Document 1 proposed by the applicant. It is made like a tatami using tatami mats, but instead of a general tatami surface, a surface sheet material 2 is used. There is no limitation on the material of the surface sheet material 2, and any material that can be bent and adhered, such as vinyl floor materials, carpets, fabrics, furs, leathers, synthetic leathers, resins, papers, artificial turfs, can be used. The mainly used materials are cushion floor sheets of vinyl floor materials, etc. Enabling the use of various materials that are usually difficult to use as a tatami surface lies in the fact that a hard underfloor board 3, to which nails or screws can be used, is adhered to the back surface of the surface sheet material 2 (hereinafter, even if not stated, it is assumed that the underfloor board 3 is adhered to the back surface of the surface sheet material 2). And the surface sheet material has a portion that protrudes from the underfloor board when adhered to the underfloor board in order to fix it to the tatami floor. Also, there is no limitation on the material of the underfloor board 3, and any hard material to which nails or screws can be used can be used regardless of thickness and size, and the functionality can be changed and the strength can be adjusted. As materials, woods (including plywood), resins, papers, metals, or a combination of multiple materials can be used. The mainly used material is plywood with a thickness of 3 mm to 4 mm, and when walking on it, one can feel the softness of the tatami floor without sinking. And a wheelchair can also be moved smoothly and used. There is no limitation on the material of the tatami floor (described in paragraph 0040). The tatami floor has no sinking like a board floor material or a vinyl floor material and is strong because a hard underfloor board 3 is adhered to the back surface of the surface sheet material. And by using a tatami floor, it is excellent in shock mitigation, has heat insulation properties, and is a product that can be replaced like a tatami.

[0003] Conventional tatami mats are made by weaving rush grass or similar materials into the warp threads. One side is fixed to the tatami base, and the other side is stretched to prevent sagging before being fixed to the base. Tatami manufacturing equipment is also designed to stretch and manufacture the tatami mat surface. While it is possible to omit the stretching process in tatami manufacturing equipment, other methods to fix the tatami mat surface to the base without sagging would involve gluing the tatami mat surface and base together, making replacement impossible. However, Tatami Base Floor 1 eliminates the stretching process and allows for replacement by attaching a hard base board 3 to the back of the surface sheet material 2. Furthermore, by making the surface sheet material usable without stretching, it becomes possible to use materials that would not normally be used for tatami mats. Even if the surface sheet material 2 is weak enough to be torn by hand, the attachment of the base board 3 provides excellent strength (durability) and resistance to sinking.

[0004] The Tatami-Based Floor 1 is characterized by its excellent shock absorption thanks to the effect of the tatami base 4 (impact test data is shown in Figures 6 and 7), excellent heat insulation, and durability and sink resistance thanks to the effect of the underlayment 3, making it suitable for lifestyles that use chairs and beds. Moreover, like tatami mats, it is not fixed to the building and can be freely converted between Western and Japanese style rooms without carpentry work. Not only can the surface sheet material be replaced when it becomes damaged, but the pattern and material of the sheet material can also be changed, allowing for room makeovers. It has been well-received by the clients to whom it has been installed, but since installation is a replacement for tatami mats, no matter how excellent the Tatami-Based Floor is, the opportunities for installation are few due to the decline in the number of tatami mats.

[0005] The current decline in Japanese people's use of tatami mats can be seen in the trends in tatami mat surface production (rush grass surface). In 1996, 26.94 million mats were produced, with 38.31 million mats supplied and a self-sufficiency rate of 70%. However, in 2023, production was 1.54 million mats, with 7.45 million mats supplied and a self-sufficiency rate of 21%, meaning 80% were imported. At its peak, there were reportedly about 47,400 rush grass farmers nationwide, including major production areas such as Hiroshima and Okayama (now Kumamoto). However, in 2023, there were only 296 (according to the Ministry of Agriculture, Forestry and Fisheries' report on the situation surrounding rush grass (tatami mat surface)), indicating a continued decline in rush grass farmers. Although there is no reported shortage of tatami mat surface despite the decrease in production, it is predictable that a scramble for tatami mat surface will occur among tatami manufacturers if imports stop. If such a situation occurs, tatami mat surface prices will soar, and the decline in tatami mat use will likely accelerate even further. While alternatives such as washi paper and resin surfaces could be considered, it is unlikely that production capacity will be expanded given the current decline in tatami mat use. This is because the lifestyle of Japanese people has already shifted towards Westernization, with flooring dominating the market and tatami mats drastically decreasing. Therefore, there is a need to develop products that are not affected by the trends in tatami mat surfaces.

[0006] While the demand for tatami mats is declining, they are not necessarily inferior to flooring. In fact, tatami mats and tatami flooring, which are not fixed to the building, are easy to maintain as they can be replaced or repaired if damaged. Furthermore, in the context of elderly care, which has become a social issue, falls can trigger the need for care from that moment onward. 80% of emergency transports due to indoor accidents involving the elderly are due to falls (according to the Tokyo Fire Department website), and the risk increases with flooring that does not adequately absorb impact. To extend healthy life expectancy, impact absorption by flooring is crucial to reduce injuries from falls. As shown in the impact test data in Figure 6, tatami flooring is superior to flooring in terms of impact absorption, and it is possible to use a surface sheet specially designed to be slip-resistant, which helps prevent falls. Moreover, in resource-scarce Japan, flooring with excellent heat insulation like tatami is also effective for energy saving.

[0007] Gymnasiums opened as evacuation shelters during disasters have wooden floors (flooring), and sitting or lying directly on them is physically uncomfortable. As a result, after some time has passed since the disaster, tatami mats are laid on the floor, and some people even place tatami mats on top of cardboard beds. During evacuation, tatami mats have an insulating effect and are used as a means of improving living conditions. A weakness of tatami mats is that even new ones can become susceptible to mites and mold if stored for a long period of time. Used tatami mats may have wear and tear on the surface, and if assigned to an individual, it is undeniable that they may feel unsanitary. If the tatami flooring uses a vinyl-based flooring sheet as the surface material, even if it gets dirty, it can be cleaned with detergent and disinfectants can be used without any problems. For long-term storage, if dirt checks are performed regularly and disinfection is carried out, it can be provided in a clean condition at all times. Even if it is not new, it can be used with peace of mind because it can be cleaned and disinfected with detergent. Tatami flooring is durable, and even those used for 10 years do not show wear that requires replacement.

[0008] For Japanese people who live without shoes, the ideal flooring material is one that excels at shock absorption, does not sink, and has excellent heat insulation (tatami mats have excellent heat insulation). The key point for shock absorption lies in the subfloor (Figure 7 shows the values ​​with and without a tatami mat subfloor). General vinyl flooring materials are attached to a subfloor where plywood or similar materials are fixed to rafters. Alternatively, they may be directly attached to concrete, resulting in flooring materials that are inferior in shock absorption due to the cushioning properties of the sheet material alone. The difference in usage between tatami floor 1 and general vinyl flooring materials is the presence or absence of a tatami mat subfloor. Furthermore, with tatami flooring, the tatami mat supports the load from above, making it possible to make the subfloor board 3 thinner. The back surface of subfloor board 3 and the surface surface of tatami mat 4 are not fixed together and can move independently, and it is presumed that the bending of subfloor board 3 when a load is applied also contributes to the shock absorption effect. Furthermore, even if the force applied from the top surface of a rigid subfloor is a point, it is converted into a surface force on the underside. For example, when a wheelchair is used, the subfloor will flex slightly but will return to its original shape once it has passed, causing little to no damage to the tatami mat. If a wheelchair-safe material (such as vinyl flooring) is used for the surface sheet, wheelchair use becomes possible. Moreover, the rigid subfloor allows the wheelchair to move smoothly. The reason why typical tatami mats are considered unsuitable as a flooring material for wheelchair users is that the tatami surface is soft, and the force applied from the surface is directly transmitted to the tatami base, damaging the soft base and causing it to sink when used with a wheelchair, making it difficult to move. In addition, the tatami surface also shows significant wear and tear. Tatami floor 1 varies depending on the materials used, but the use of surface sheet material 2 and tatami base 4 provides excellent shock absorption and heat insulation, and the use of a subfloor provides excellent durability and resistance to sinking, making it an ideal flooring material. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2014-122466 [Patent Document 2] Japanese Patent Publication No. 2011-202399 [Overview of the Initiative] [Problems that the invention aims to solve]

[0010] Tatami flooring allows for the conversion of a room into a Western-style room simply by replacing the existing tatami mats, and its durability allows for wheelchair access. While it has been well-received by our clients, given that Japanese lifestyles have become Westernized and flooring now dominates, it is necessary to devise installation methods other than simply replacing tatami mats. It is important to enable the use of tatami flooring even in an exposed state (such as as removable tatami mats). Furthermore, it is crucial to offer tatami flooring that is differentiated from typical removable tatami mats. Simply offering removable tatami mats will not be enough to expand the declining demand. The solution lies in adding value (functionality) that makes people want to use it. This invention must be usable even on existing flooring, and aims to provide a tatami-based floor with added value that will appeal to people who do not use tatami or are unfamiliar with tatami. [Means for solving the problem]

[0011] The present invention provides reinforcing materials to the surface sheet material, tatami base, and subfloor of a tatami floor, allowing them to be used even when exposed. Furthermore, the reinforcing materials can be used for purposes other than reinforcement. For example, the reinforcing materials can be used to make it possible to attach and detach the surface sheet material and the tatami base. One reason why tatami is avoided is the hassle of having to hire a professional to replace the tatami surface, which is a form of maintenance. Tatami floors are strong and require almost no maintenance, but when it is time to replace them, a professional must be hired. As a solution, the surface sheet material and the tatami base can be made detachable so that replacement can be done by the user. Furthermore, by utilizing the convenience of being able to attach and detach the surface sheet material and the tatami base, it becomes possible to further process them and create new functionalities.

[0012] A major advantage is the use of a surface sheet material that is not affected by trends in tatami matting, rather than using conventional tatami matting. Depending on the pattern of the sheet material used, it can even have the effect of not being recognizable as tatami. Furthermore, it was discovered that the back of the baseboard and the surface of the tatami core are not glued together, and when something is placed in between, the baseboard acts as a protective material and the tatami core acts as a cushioning material. By utilizing these features, we will open up new sales channels. [Effects of the Invention]

[0013] Making it possible to use tatami flooring in an exposed state represents a major turning point. However, simply making it usable as a removable tatami mat is not enough to create a product that people who have never used tatami before would want to use. It has been found that by adding reinforcement materials to all or part of the surface sheet material, tatami base, and subfloor, and / or by processing them, it is possible to further utilize the characteristics of tatami flooring and enhance its functionality. One example is that the surface sheet material can be easily attached and detached from the tatami base by anyone. Furthermore, the ability to attach and detach it opens up various ways of use, making it a product that goes beyond just a removable tatami mat. By devising ways to add reinforcement materials to all or part of the surface sheet material, tatami base, and subfloor of the tatami flooring, it is possible to change the form of use. Furthermore, by processing it, it is possible to bring about new functionality. While tatami-based flooring was previously installed as a replacement for tatami mats, making it possible to use it in an exposed state allows for standalone use, eliminating restrictions on installation methods and expanding sales channels. Furthermore, mass production is possible for the same size, reducing costs. [Brief explanation of the drawing]

[0014] [Figure 1] This is a cross-sectional view of the structure of the tatami floor 1 according to the present invention. [Figure 2] This is a structural diagram showing a storage compartment added to a tatami mat base. [Figure 3] This diagram shows the shapes of the rod-shaped side reinforcement members 10. A: Rectangular shape, B: Shape with one rounded point, C: Trapezoidal shape, D and E: Method of installing the rod-shaped members [Figure 4] This is a structural diagram showing a tatami floor with cover 16 applied. [Figure 5] This is a structural diagram showing a surface sheet material with holes processed into it. [Figure 6] This is impact test data, showing impact values ​​for tatami flooring and hardwood flooring. [Figure 7] This is impact test data, showing the effect of the base on impact mitigation with and without a tatami mat base. [Modes for carrying out the invention]

[0015] A tatami floor comprising a surface sheet material, a bottom floor made of a hard material that can use nails or screws, and a tatami floor, which are laminated in this order from above. The surface sheet material and the bottom floor are adhered, and the surface sheet material is provided with an overhanging portion from the bottom floor when adhered to the bottom floor in order to fix it to the tatami floor. The surface of the tatami floor and the back surface of the bottom floor are not fixed, and a reinforcing material is provided on all or part of the surface sheet material, the tatami floor, and the bottom floor and / or processing is performed. According to such a configuration, it is possible to use the tatami floor in an exposed state, and it is also possible to provide a tatami floor that is differentiated from general tatami mats and laid-out tatami mats. By enabling the added value (functionality) that is considered desirable, it is possible to expand the demand for tatami mats that are declining. The opening measure is to make a product that people who do not use tatami mats and those of the generation who do not know about tatami mats also want to use, and it is also a solution to solve the dissatisfaction of those who are dissatisfied with the current tatami mats.

[0016] Patent Document 1 describes various usage methods of tatami floors. There are descriptions such as a sizing method for manufacturing tatami mats that can be freely placed in a Western-style room, and that if they are stacked and used like a bed or a sofa, the space for storage is not required when not in use. However, it did not lead to the manufacture of a tatami floor that can be used in a Western-style room. The main reason is that it did not achieve the strength required to enable use in an exposed state. In the current tatami floors, there is a risk of damage to the surface sheet material and the tatami floor. The tatami floor has reached the point of adhering the surface sheet material using the bottom floor based on the construction method of the sheet material as a means of using the surface sheet material like the tatami surface. Therefore, the strength of the upper surface is ensured, but the strength required for use in an exposed state has not been achieved, and the construction could only be carried out by replacing it with a tatami mat. However, it is essential to enable use in an exposed state, and it should also be possible to use it alone.

[0017] Explanation will be made about FIG. 1. FIG. 1 is an example in which a reinforcing material is provided on the surface sheet material 2 and the tatami floor 4 of the tatami floor 1. And the reinforcing material may also be provided on the bottom floor 3. In order to enable the use of the tatami floor 1 even in the exposed state, a reinforcing material is provided to prevent damage, but there are no limitations on the material of the reinforcing material and the method of installation. In addition, it is also important to add a slope or the like to add new functionality. Figure 1 shows an example of installing a rod-shaped body <10> having an effect similar to using a frame material on the tatami floor, with the symbols facing in a correct visible direction. There are no limitations on the material of the rod-shaped body <10>, and materials such as woods, metals, resins, etc. can be considered. However, as long as the tatami floor can be used even in the exposed state, a soft material may also be used. For example, foamed rubber or the like may be used. A soft material also has a buffering effect. In addition, the material may be of one type or a combination of multiple types. A combination of a hard material and a soft material may also be used as a combination that adds functionality such as enabling detachment. The rod-shaped body <10> can be provided at a part or all of the periphery of the tatami floor or at the necessary parts. On the left side of Figure 1, an example is shown where a tatami side reinforcing material <8a> is installed on the tatami <4> in accordance with the height of the underfloor, the rod-shaped body <10> is installed, and the surface sheet material <2> is sandwiched therebetween and fixed with screws. By making the height of the rod-shaped body <10> substantially the same as or slightly higher than the surface sheet material, there is an effect of preventing damage to the surface sheet material, and depending on the material used for the tatami side reinforcing material <8a>, fixation with screws, bolts, etc. becomes possible. There are no limitations on the installation method and material of the tatami side reinforcing material <8a>, and it is also possible to place it under the underfloor by adjusting the size of the tatami (like on the right side). As long as the use of screws, bolts, etc. for fixation is possible, materials such as woods, metals, resins, etc. can be considered, and there are no limitations on the fixation method either. It is also possible to stick it, but it is also possible to use a surface fastener, a magnet sheet, a magnet, etc. that can be easily detached and attached.

[0018] On the right side of Figure 1, an example is shown where a slope <11> is provided on the tatami floor. In the figure, the slope <11> is provided inside the surface sheet material, but the slope <11> can also be provided outside like the rod-shaped body <10>. If the length of the surface sheet material is insufficient due to the installation of the ramp 11, it is possible to extend it using the overhangs 6a and 7a (described in paragraph 0027), and it is also possible to attach the reinforcing material 7 to the back of the surface sheet material. There are no limitations on the shape, installation method, installation position, size, material, or fixing method of the ramp 11, and it can be made of hard or soft material. Even when using a soft material, reinforcement can be provided by installing the reinforcing material 6 (on the surface of the surface sheet material) and the reinforcing material 7 (on the back of the surface sheet material). In particular, if a hard material that can be used with nails or screws is used for the reinforcing material 7, it will have the same effect as a base plate. There are no limitations on the material of the reinforcing material 7 (described in paragraph 0025), but by using a hard and strong material, sinking can be eliminated, wheelchair use will be possible, and damage to the ramp will be prevented. It is possible to attach and fix the surface sheet material to the reinforcing material 7, but there are also installation methods that allow for attachment and detachment. In Figure 1, the surface sheet material is extended using the protruding parts 6a and 7a, but it is also possible to attach it to the reinforcing material 7 without using the protruding parts 6a and 7a. If the surface sheet material is a vinyl flooring material (such as a cushion floor sheet), a seam treatment agent can also be used. In Figure 1, the tatami floor side reinforcing material 8a is matched to the height of the back of the subfloor, but this can be changed according to the method of installing the slope. By using the tatami floor side reinforcing material 8a and the detachable reinforcing material 5 as a set, it is possible to install the slope in a way that prevents it from shifting. For example, a metal material to which magnets can be attached can be used for the tatami floor side reinforcing material 8a, and a material with magnets or a magnetic sheet can be used as the detachable reinforcing material 5 on the side of the slope, or vice versa. There are no restrictions on the material or method of use of the detachable reinforcing material 5, and hooks and other fasteners can also be used, which have the effect of being detachable and preventing it from shifting. There are no limitations on the height, material (as described in paragraph 0028), thickness, or size of the tatami floor side reinforcement material 8a. For example, it is possible to wrap the slope with surface sheet material and fix it to the bottom with screws, bolts, nails, etc. 18. There are various ways to fix the slope, and it is also possible to extend the surface sheet material to the tip of the slope. Furthermore, it is possible to attach the slope to the outside of the tatami floor, like the rod-shaped body 10 on the left side.In that case, it is important to take precautions such as making the height almost the same as the tatami floor to prevent tripping, and there is also a method of reinforcing and connecting them, such as the reinforcing material 6 shown in Figure 1.

[0019] If there is concern about separation or damage at the joint between the tatami floor and the ramp, for example, reinforcing material 6 can be used at the joint. As for the material, cloth or resin materials can be used, but it is also possible to use metal materials and fix them with screws, bolts, nails, etc. 18. There are no limitations on the material of reinforcing material 6 (described in paragraph 0025), but by selecting a material and shape that does not pose a risk of peeling up and getting caught, it is possible to stabilize the joint between the tatami floor and the ramp and take measures to prevent damage to the surface sheet material. If there is concern about damage to the tip of the ramp, it is also possible to install a ramp tip reinforcing material 12. There are no limitations on the material of the ramp tip reinforcing material 12, and it is possible to use a non-slip material or attach it to the floor with adhesive tape, but it is best to choose a material that can adhere to the floor and will not scratch the floor. For example, silicone material, rubber material, resin material, etc. can be considered. Furthermore, when using the tatami mats as portable tatami mats, it may be necessary to use anti-slip materials or anti-slip sheets 21 on the back surfaces of the tatami floor 1, rod-shaped body 10, and slope 11 (they can also be attached) to prevent movement.

[0020] During disasters, hygiene is a particular concern, and ideally, one would want to clean the area where infants sleep with disinfectant before using it. However, unfortunately, the tatami mats commonly used during disasters are prone to discoloration when disinfected. With tatami-based flooring, however, using a vinyl sheet material for the surface prevents fraying like typical tatami mats, even during use, and allows for the use of detergents and disinfectants even during long-term storage, making it a safe and reliable option. Providing a clean environment during disasters is also important. If tatami flooring is used in many places, it will be possible to gather it in disaster areas in a short time. In order to make it usable in many places, it is important not to just leave it as "removable tatami." By adding reinforcement materials to all or part of the surface sheet material, tatami base, and subfloor, and / or processing them, the form of use can be changed, and new functionality can be added.

[0021] Currently, the mainstream portable tatami mats on the market are thin products with a thickness of about 15 mm. The reason why they must be thin when used as portable tatami mats is due to reasons such as the occurrence of unevenness and durability issues due to the load placed on the corners and edges if they were thicker. The thickness of a typical tatami mat is about 3 cm to 6 cm, with two inches being the mainstream, but the excellent shock absorption function, which is one of the advantages of tatami, is also its weakness, due to the softness of the tatami base. It is weak in that it deforms and breaks when a load is applied, and this is particularly noticeable at the corners and edges when used in an exposed state. As a measure to prevent damage, tatami mats are originally used with the edges surrounded at approximately the same level as or slightly higher than the thickness of the tatami mat, with the sides hidden and the corners and edges protected. However, when using them as portable tatami mats, it is necessary to assume that they will be used in an exposed state. Therefore, a thin, hard, and durable tatami base is used to prevent deformation and damage. Furthermore, in the original construction method of stretching the tatami surface, the tatami base would bend under the pressure of the surface, so many products are glued together to integrate the tatami surface and base without stretching the surface. Also, if thin tatami mats are not used, the edges can be surrounded by a frame, but gaps may occur between the tatami and the frame material, which poses a tripping hazard. As shown in Patent Document 2, there is also the invention of a tatami base with an integrated slope to eliminate steps, but the part of the tatami base that will form the slope is compressed with a press machine to reinforce the slope, but this requires advanced technology, and it is impossible to modify the finished product afterward, so it lacks flexibility.

[0022] Even when using a tatami floor in an exposed state, damage can be avoided by adding reinforcing materials to the entire surface sheet, tatami base, and subfloor, or to a portion thereof. There are no limitations on the material, shape, or method of installation of the reinforcing materials, and it is possible to strengthen areas where damage is a concern. Corners and edges are particularly prone to damage, but by using reinforcing materials, damage can be avoided, eliminating the need to use thin tatami mats to avoid damage, and allowing for free creation of thickness, shape, and size. By freely adding reinforcing materials to the surface sheet, tatami base, and subfloor, it is possible to create a tatami floor with greater flexibility. Furthermore, by processing the materials, it becomes possible to change the form of use and add new functionality.

[0023] There are no restrictions on the surface sheet material 2 used (as described in paragraph 0002), and the main material used is cushion floor sheet (vinyl flooring material). However, it can be freely selected from the manufacturer's catalog, and there is a wide variety of patterns available, such as flooring patterns, rush grass patterns, and Western patterns, allowing you to freely change the room to either a Western or Japanese style room. Furthermore, by attaching the underlayment board 3, the functionality of the sheet material is almost the same as when it is commonly used. Moreover, the underlayment board 3 and tatami base 4 are not attached, and can be replaced. There are no restrictions on the materials used, and the surface sheet material 2, underlayment board 3, and tatami base 4 can be freely selected, and the strength and thickness can be adjusted, and the size and shape can be freely made. When using plywood for the baseboard 3, the standard size is 910mm x 1820mm. However, tatami mats are broadly divided into Kanto-ma (using 910mm x 1820mm for the tatami base) and Kyo-ma (using 1000mm x 2000mm for the tatami base). For Kyo-ma size, there was no way to increase the size other than increasing the number of tatami base floors or changing the size of the tatami area from Kyo-ma size to Kanto-ma size. However, by adding reinforcing material to the baseboard and / or processing it, it is possible to enlarge the size. For example, it is possible to enlarge the size by using three or more baseboards, offsetting them to the required size, and cutting and attaching other baseboards where steps occur, but the thickness will double. One way to keep the thickness as unchanged as possible is to use a thin reinforcing material instead of the baseboard on the back, but reinforcing the joints is important. Furthermore, if the adhesive between the baseboard and the surface sheet material can be peeled off later, the baseboard can be reused when replacing the tatami mat. By adding and / or processing reinforcing materials to all or part of the surface sheet material, tatami base, and baseboard, it becomes possible to adjust the strength and thickness, and to freely create the size and shape, thereby improving functionality.

[0024] The configuration of the reinforcing material applied to the surface sheet material 2 will be explained in detail, specifically the reinforcing material 6 applied to the surface of the surface sheet material and the reinforcing material 7 applied to the back surface of the surface sheet material. There are no particular limitations on the material, installation method, etc., of the reinforcing material applied to the surface sheet material, provided certain conditions are met. Installation may be done with only the reinforcing material 6, only the reinforcing material 7, or on both sides of the surface sheet material, and may be applied to part or all of the surface. Furthermore, there may be one type of reinforcing material, multiple types, or a combination of several types. In addition, the order of reinforcing material 7 may be surface sheet material 2, reinforcing material 7, and base plate 3 before the base plate 3 is attached to the surface sheet material 2, or surface sheet material 2, base plate 3, and reinforcing material 7 after the base plate is attached. In either case, there is no problem in applying reinforcing material 7 to the base plate. Furthermore, by using the reinforcing material on the base plate 3, it becomes possible to change the strength, softness, and functionality of the base plate afterward. For example, it is possible to reinforce the baseboard with materials that improve heat conductivity, materials with excellent heat insulation properties, soundproofing sheets, or materials with excellent shock absorption properties. By adding and / or processing these reinforcements, it is possible to change the functionality.

[0025] The size, material, installation method, and installation location of reinforcing materials 6 and 7 are not particularly limited as long as certain conditions are met. Ensuring safety is of paramount importance. Possible materials for the reinforcing materials include, but are not limited to, fabrics (including tatami edging and thermoplastic plaster bandages), paper (including synthetic paper), vinyl materials, resins (including silicone, PET sheets, plastics, plastic films, and synthetic resins), wood (including boards), metals, metal tapes (aluminum tape, stainless steel tape, etc.), rubbers (including foamed rubber), hook-and-loop fasteners, and magnetic sheets. There are also various installation methods for reinforcing materials 6 and 7; some materials are best used by attaching them to the surface sheet material, while others can be fixed with screws or bolts. When installing a ramp on a tatami floor, using a hard material for reinforcing material 7 will allow a softer ramp to be used without sinking. It is also possible to attach reinforcing material 7 to the back of the surface sheet material and use it in the same way as a subfloor. Furthermore, it is possible to use a design that allows for easy attachment and detachment, and it is also possible to use materials that adhere simply by being placed down (such as silicone or rubber). As long as certain conditions are met, there are no limitations on the mounting method, and there are various mounting methods such as adhesive, sewing, hook-and-loop fasteners, zippers, magnets, magnetic sheets, hooks, screws, bolts, staples, etc.

[0026] The reinforcing material 6 can be transparent, but it can also be used with its appearance in mind, considering how it will be displayed. If it is printed with various patterns such as floral, polka dot, flooring, or stripe patterns, it will look stylish without emphasizing its purpose. Alternatively, it is possible to attach tatami edging. The tatami edging can be attached to the top corners and sides of the surface sheet material, or the tatami edging can be attached to the back of the surface sheet material as reinforcing material 7. By using hook-and-loop fasteners, magnetic sheets, etc. as reinforcing materials, it becomes possible to fix the floor in a detachable manner. For example, if hook-and-loop fasteners, magnetic sheets, etc. are used as reinforcing material 6 on the side of the tatami floor, it becomes possible to connect adjacent tatami floors even when using multiple tatami floors 1. When using multiple tatami floors, this has the effect of avoiding the risk of gaps forming when the tatami floors 1 are separated. Also, when installing in the corner of a room, it is possible to fix the floor in a detachable manner by processing the wall surface as well.

[0027] Furthermore, the reinforcing material 6 may have an overhang 6a extending from the surface sheet material, and the reinforcing material 7 may have an overhang 7a extending from the surface sheet material, allowing for the extension of the surface sheet material. There are no restrictions on the material of the surface sheet material as long as certain conditions are met, but most materials have dimensions. For example, cushion floor sheets, which are mainly used as the material for the surface sheet material, are often 182 cm wide, but by adding overhangs 6a and 7a, it is possible to extend the surface sheet material. There are no restrictions on the material, size, or construction method of the overhangs 6a and 7a. For example, the material can be selected from the materials mentioned above for the reinforcing material. Also, either one or both of the overhangs 6a and 7a may be included, and the method best suited for extending the surface sheet material should be selected. For example, one method is to extend the surface sheet material by attaching it to the surface sheet material by creating overhangs 6a and 7a. If the surface sheet material is made of a material unsuitable for attachment, such as carpet, another method is to create overhangs 6a and 7a and sew them on. There are no restrictions on the material or construction method of the overhangs 6a and 7a, so the most suitable method for the surface sheet material should be selected. It is also possible to change the pattern and material of the surface sheet material from the extended section onward. Even if the length of the surface sheet material only reaches partway down the side of the tatami floor, extending the surface sheet makes it possible to secure the necessary length for fixing. For example, it becomes possible to extend the surface sheet material to the bottom of the tatami floor and fix it to the tatami, which also has the effect of preventing snagging and damage that can occur due to insufficient length of the surface sheet material.

[0028] The tatami base reinforcement material 8 used for the tatami base 4 is mainly used on the sides, top, and bottom (back) surfaces. However, if a storage compartment 9 is provided as shown in Figure 2, the storage compartment reinforcement material 8d of the tatami base reinforcement material 8 can also be used in the storage compartment 9. There are no restrictions on the material of the tatami base side reinforcement material 8a used on the sides of the tatami base 4. For example, hard materials such as wood (including plywood), resins (including plastics), and metals can be used, which has the effect of preventing deformation of the soft tatami base. Furthermore, it also has the effect of preventing damage to the surface sheet material 2 caused by deformation of the tatami base 4. By using hard material reinforcement on the outside of the sides of the surface sheet material, it becomes possible to fix it with screws, bolts, etc., and it is possible to install it without gaps, providing a frame effect and allowing for attachment and detachment. In addition, because screws, bolts, etc. can be used, it is also possible to fix adjacent tatami base floors together and to the walls of the room using joint fittings, etc. Furthermore, joint trim and wall trim can also be used if the size is appropriate. The sides to which the tatami base side reinforcement material 8a, rod-shaped body 10, and slope 11 are attached are not limited to one side or all sides. There are also no limitations on the method of fixing the tatami base side reinforcement material 8a to the tatami base, but for example, if the material of the tatami base is difficult to adhere to, it may be fixed to the tatami base using auxiliary reinforcement materials such as cloth or tatami edging, and a method that allows the tatami base side reinforcement material 8a to be fixed to the tatami base should be used.

[0029] The tatami floor of the present invention is a tatami floor as described in claim 1, characterized in that the surface sheet material can be fixed to or detached from the tatami base by reinforcing materials provided on and / or processed on the surface sheet material, tatami base, and subfloor. With this configuration, anyone can replace tatami mats, which previously could only be done by tatami craftsmen. There are no limitations on the method of fixing the surface sheet material 2 to the tatami base 4, but it is fixed by sewing and fastening needles (staples, etc.) as with general tatami mats, and it was necessary to request a specialist when replacing the tatami mats. However, it was discovered that the surface sheet material can be detached from the tatami base by reinforcing materials provided on and / or processed on the surface sheet material, tatami base, and subfloor. There are no limitations on the material and construction method of the reinforcing material, as long as a material that can be attached and detached is used as the reinforcing material. For example, as reinforcing materials for the surface sheet material, baseboard, and tatami base, it is possible to use removable hook-and-loop fasteners, magnetic metal materials, magnetic sheets, or magnets. If a hard reinforcing material is provided to the tatami base, it is also possible to fix it with screws or bolts. There are limitations, such as using surface sheet material and tatami base of the appropriate size, but it can be easily attached and detached. Furthermore, if a hard reinforcing material is used on the side of the tatami base, it is also possible to fix the surface sheet material from the outside with screws or other fasteners using a rod-shaped object. In addition, there is a method of processing the surface sheet material like a box lid. There are various ways to fix or allow the surface sheet material and tatami base to be attached and detached. The reason why the surface sheet material 2 can be attached and detached from the tatami base 4 is that the baseboard is attached to the back, so the shape (including size) of the surface sheet material 2 does not change much even when it is removed from the tatami base 4. Furthermore, it is also possible to process the surface sheet material so that it can bend toward the side of the tatami base, making it easier to attach and detach. Furthermore, a groundbreaking feature is that the reinforcing materials and / or processing applied to the surface sheet material, tatami base, and underlayment make it possible to change the size and add new functionality.

[0030] By making the surface sheet material detachable from the tatami base, it becomes possible to differentiate it from ordinary tatami mats and portable tatami mats. In general portable tatami mats, the tatami surface and tatami base are often glued together, making it impossible to remove them. Even in portable tatami mats where the tatami surface and tatami base are not glued together, if the tatami surface is removed from the tatami base, a professional tatami craftsman is required to put it back into a portable tatami mat. In contrast, in tatami base floors, the surface of the tatami base and the back of the subfloor are not fixed together, and the shape of the surface sheet material does not change even if the surface sheet material is removed from the tatami base. By fixing the surface sheet material and tatami base using the detachable reinforcement material 5, anyone can perform the replacement work. Therefore, if the surface sheet material and tatami base are made of approximately the same size, they can be replaced. This makes it possible to differentiate it from ordinary portable tatami mats that are disposable. The detachable reinforcement material 5 can be used to make the surface sheet material and tatami base detachable, as well as to make ramps and other similar items detachable.

[0031] If the surface sheet material can be easily attached and detached from the tatami base, then the surface sheet material can be replaced, and the tatami base can also be replaced. Replacement is possible when it is damaged, when redecorating a room, or even to change the material between summer and winter. The pattern of the surface sheet material can also be used to freely change between a Western-style room and a Japanese-style room. If there is no place to store the removed surface sheet material, it can be stacked without being removed, or both sides of the tatami base can be used, making it reversible. The installation method is the inside and outside, and there are no size issues if the left and right sides are reversed. For example, even if the material used for the tatami base is only foam material (such as polystyrene foam), a hard baseboard is attached to the back of the surface sheet material, so it can be used without any problems.

[0032] There are no limitations on the method of making attachment and detachment possible, and there are various ways of using it. For example, hook-and-loop fasteners, zippers, hooks, etc. can be used as reinforcing materials for the surface sheet material and tatami base, or two or more types of reinforcing materials can be used in combination. Another method is to use materials that magnets can attach to, such as iron, cobalt, and nickel, along with magnets and magnetic sheets. It is also possible to use hard reinforcing materials for both the tatami base and the surface sheet material. For example, by using hard plate material or iron material as reinforcing material, it becomes possible to fix it with screws, bolts, etc.

[0033] By making the surface sheet detachable from the tatami base, it becomes possible to use materials that are not typically used for tatami bases, as well as materials that are otherwise unsuitable for tatami bases. The ability to detach the surface sheet from the tatami base allows for repeated adjustments of strength and size by removing the surface sheet from the base. This also enables the use of materials that were previously unsuitable for tatami bases, allowing for various uses by adding reinforcement and / or processing afterwards, in addition to re-covering and replacing the tatami base. There are no restrictions on the material used for the tatami base, but for example, cardboard (for example, cut to the required height and assembled and unfolded like an accordion), cardboard boxes, cardboard beds, air mattresses, and polystyrene foam alone can be used. Even if a material is not strong enough to support a person's weight when used alone, covering it with a surface sheet (which has a hard baseboard attached to the back so that the load applied from above is distributed to the bottom) creates a synergistic effect that makes it usable as a tatami base. Furthermore, it may become possible to use materials that are only suitable for short-term use for extended periods. The ability to attach and detach the sheet allows for strength and size adjustments to be made when the sheet is removed, and the strength of the top surface can be adjusted with the baseboard, and reinforcing materials can also be used on the baseboard. In addition, the strength of the sides can be adjusted with reinforcing material 7 and tatami base reinforcing material 8 (side reinforcement is possible with tatami base side reinforcing material 8a). Furthermore, it is possible to add cuts and other processing to the base plate, allowing it to be used in a wave shape or rolled up for storage. It is also possible to use divided materials, and the size can be changed. There are no limitations on the material of the surface sheet (described in paragraph 0002), and it is possible to use water-resistant sheet material as the surface sheet material, or to use a soft, heat-retaining material. For example, cardboard boxes can be reshaped and used as chairs, tables, etc. It is also possible to change cardboard beds into products with increased durability, water resistance, and other new functionalities, and in the case of air mattresses, it also has the effect of reinforcing strength and reducing unevenness.

[0034] The tatami floor of the present invention is a tatami floor as described in claim 1 or 2, characterized in that a heating element, an impact sensor, or an object can be sandwiched between the baseboard and the tatami floor. With this configuration, the back surface of the baseboard and the top surface of the tatami floor are not fixed together, and it is possible to sandwich a heating element 13. Furthermore, there are no limitations on what can be sandwiched, and it can be an impact sensor 14 or an object 15. (As described in paragraphs 0035 to 0040) In the tatami floor, a hard baseboard 3 is used, and the baseboard 3 and the tatami floor 4 are not glued together, so the heating element, impact sensor, or object sandwiched between them is protected. Furthermore, by using a reinforcing material 5 that can be attached to and detached from the surface sheet material and the tatami floor, the surface sheet material can be attached to and detached from the tatami floor at any time, and the heating element, impact sensor, or object sandwiched between the surface sheet material and the tatami floor can be freely inserted and removed, thereby improving functionality. While it is possible to sandwich items between ordinary tatami mats, the tatami surface does not have the strength to protect the sandwiched items, and removing the tatami surface from the tatami base requires the services of a professional.

[0035] The heating element, impact sensor, or object placed between the subfloor and the tatami base is not only protected by the subfloor, but the tatami base also acts as a cushion and insulator. Furthermore, it can be fixed in place to prevent movement if necessary. For example, the heating element is intended to be used like underfloor heating, but unlike typical underfloor heating, it can be changed and removed after installation, installed only where needed, and its installation location can be changed. With typical underfloor heating, changes after installation cannot be made without construction work, so if a malfunction occurs under the floor, major construction work is required. However, with tatami flooring, the surface sheet material can be detached from the tatami base, making repairs easy and product replacement possible. Moreover, there are no limitations on the size of the tatami flooring, nor on the material and size of the heating element. For example, the heating element can be made of a thin, flexible film-like material or a commercially available hot carpet, and it can be used in part of the tatami flooring or throughout, and its size and installation location can be changed. If multiple tatami flooring units are used, the heating elements can be connected, and there are no restrictions on the material, size, or installation method of the heating elements. In typical underfloor heating systems, the main flooring material used is thick flooring (approximately 12mm to 15mm thick), which is slow to heat up and results in high energy costs. In contrast, tatami flooring uses tatami mats as the base layer, and there are no restrictions on the material or thickness of the subfloor. Thin 3mm plywood is often used, allowing for quick heating and energy savings. Furthermore, it is possible to use reinforcing materials (aluminum, copper, etc.) on the underside of the subfloor and the top surface of the tatami mats to improve heat conductivity, leading to even greater energy savings.

[0036] The impact sensor can be a commercially available or existing product. While impact sensors are often used to detect when elderly people get out of bed, if they are simply placed next to the bed, even elderly people with dementia may perceive stepping on it as someone approaching, causing them to assume awkward positions to avoid stepping on it and increasing the risk of falls. By placing the impact sensor between the subfloor and the tatami mat, it becomes invisible and less likely to be noticed. Furthermore, if the impact sensor is too thick to be sandwiched between the subfloor and the tatami base, a storage compartment 9 can be made to the optimal size and used to house it. One of the advantages of using a tatami base floor is that it allows for flexible responses, and the strength of flooring that is not fixed to the building is that it can be freely changed later. If the sandwiched impact sensor does not work as expected, it can be replaced. Because the surface sheet material can be attached to and detached from the tatami base, both the product and the installation method can be freely changed.

[0037] There are no restrictions on the objects that can be placed between the subfloor and the tatami mat; anything that can be placed between them is acceptable. For example, it is possible to improve insulation by placing thermal insulation sheets, air sheets, or foamed resin between them, and it is also possible to improve sound insulation by placing sound-insulating materials between them. Materials with excellent sound insulation properties often use rubber, which is incompatible with vinyl flooring materials, so they are not suitable for installation on the top surface of the surface sheet material, but there is no problem when placing them between the subfloor and the tatami mat. High-density rubber is particularly effective for high-frequency sound insulation, and it is also possible to place materials with excellent low-frequency sound absorption between them. The insulation board used in tatami mats is made of a material with excellent low-frequency sound absorption properties, and by combining both, it exhibits excellent soundproofing effects. In addition, shock absorbers, shock-absorbing mats, and shock-absorbing sheets can also be placed between them. These are materials with excellent energy absorption properties that absorb vibrations and shocks. There are no restrictions on the material, but various materials such as foamed polyurethane foam, urethane sheets, NBR (foamed nitrile rubber), synthetic rubber, and gel sheets are available, and the most suitable material should be used. A moisture-absorbing sheet can also be inserted. By inserting a moisture-absorbing sheet, it becomes possible to absorb moisture absorbed by the tatami mat base. If vinyl flooring material is used for the surface sheet material, moisture from the top surface will likely be blocked, but as a way to prevent moisture from the bottom surface, one can consider laying a vinyl sheet. However, if the tatami mat base absorbs moisture, inserting a moisture-absorbing sheet between the baseboard and the tatami mat base and replacing it regularly is effective. It is also possible to insert photographs (laminated to prevent discoloration), banknotes (savings), etc. Any object can be inserted, as long as it has a concrete shape and exists. If the surface sheet material is detachable from the tatami base, the object being sandwiched can be easily replaced. The surface sheet material can also be extended, allowing for length adjustment to match the thickness of the object being sandwiched, thus eliminating limitations on the thickness of the object being sandwiched. The surface sheet material can be replaced, and it is also possible to use a tatami base floor that matches the size of the object being sandwiched, but the important point is to avoid creating bumps or unevenness so that the subfloor is not damaged when the object is sandwiched.

[0038] Even in rental properties, it is possible to use tatami flooring that is not fixed to the building, and if it can be used in an exposed state, it can be easily moved anywhere. In addition to being used as flooring material, for example, tatami flooring with sound insulation material sandwiched in between can be assembled into a box shape, and if a baseboard and hard reinforcing material are used, it can be fixed with screws, etc., and used as a simple soundproof room. It is also possible to use sound insulation material, sound insulation sheets, etc. as reinforcing material for the tatami flooring, and various uses are possible depending on ingenuity.

[0039] The tatami floor of the present invention is characterized in that, as described in claim 1 or 2, a storage compartment is provided in the tatami floor of the tatami floor. With this configuration, various items can be stored by providing a storage compartment. The tatami floor uses a hard baseboard, and the tatami floor can be reinforced with a tatami floor reinforcement material 8, and the storage compartment 9 can also be reinforced using a storage compartment reinforcement material 8d. The tatami floor reinforcement material 8 includes a tatami floor side reinforcement material 8a, a tatami floor top surface reinforcement material 8b, a tatami floor back surface reinforcement material 8c, and a storage compartment reinforcement material 8d, and can be used to reinforce the tatami floor. The use of the reinforcement material is not limited to the entire surface or part of the tatami floor, nor is it limited in terms of the location or material of use. There is no limit to the hardness of the reinforcement material; for example, using a hard material for the tatami floor top surface reinforcement material 8b has the effect of reinforcing the storage compartment, and the tatami floor back surface reinforcement material 8c has the effect of reinforcing the bottom of the storage compartment. A storage compartment reinforcement material 8d is provided to reinforce the storage compartment, and more reinforcement methods are safer, as ensuring the strength of the storage compartment makes it possible to provide the storage compartment 9. Tatami mats are generally made of multiple layers and are manufactured by cutting them to size, so materials that can be easily cut are used. Generally, it is not common to cut only one layer of a tatami mat made of multiple layers, but being able to freely cut out one or two layers as needed eliminates limitations on the size and number of storage compartments, making it possible to create storage compartments 9.

[0040] There are no restrictions on the materials used to construct a tatami mat base, nor on its size or thickness. Tatami mats used in temples and other places are sometimes made by stacking two tatami mat bases, known as "nijodai." Stacking tatami mat bases in this way eliminates any limitations on thickness (Figure 2A). While straw bases were once the mainstream for tatami mat bases, currently, bases made by layering board (insulation board) and foamed material (polystyrene foam) with a protective sheet on the back are the mainstream. However, there are also tatami mat bases made from other materials such as kenaf and cypress, and some use cushioning materials specifically designed to absorb shock. Furthermore, there are tatami mat bases used in floors with underfloor heating, which, despite being only about 10mm thick, are strong enough not to break even at the size of a single tatami mat. In addition, cardboard is sometimes used for millimeter-level thickness adjustments. Since there are no restrictions on the materials used or the number of layers in a tatami mat base, the optimal base is selected and cut to size for manufacturing. Furthermore, the strength of the tatami floor can be adjusted with a subfloor, and it is possible to use even soft materials like polystyrene foam as the base for the tatami, thus reducing weight. When stacking multiple layers, the thickness can be freely adjusted by gluing or sewing them together to prevent them from falling apart. When sewing, it is also effective to use cardboard or protective sheets to prevent the threads from coming loose. By adding and / or processing reinforcing materials to all or part of the surface sheet material, tatami base, and subfloor, the strength of the sides of the tatami floor can be reinforced, and materials with cavities, such as cardboard boxes and cardboard beds, can also be used as tatami bases. The cavities in cardboard boxes can also be effectively utilized as storage space. Cardboard boxes have large cavities, but it is possible to add partitions, which also reinforces their strength. Furthermore, (as described in paragraph 0045) Figure 4-I shows a diagram with a three-dimensional cover attached, but it is possible to make the tatami floor itself have a similar shape. While a tatami mat base is usually a single mat, if the heights are roughly the same, it is possible to combine multiple mats into one tatami mat using a surface sheet material (as described in paragraph 0061).

[0041] Let me explain Figure 2. This figure shows a storage compartment 9 provided in the tatami mat base. Figure 2A shows an example of creating a storage compartment 9 by cutting out a portion of a single tatami mat base. As reinforcement materials for the tatami mat base, side reinforcement material 8a is used to reinforce the sides of the tatami mat base, top reinforcement material 8b is used to reinforce the top surface of the tatami mat base, and underside reinforcement material 8c is used to reinforce the underside of the tatami mat base. Figure 2(i) shows an example of creating a deep storage compartment 9 by stacking four tatami mats. There is no limit to the number of tatami mats that can be stacked. This is an example of creating a storage compartment 9 and reinforcing the storage compartment with storage compartment reinforcement material 8d. There are no limitations to the size or material of the tatami mats; the boards and foam materials commonly used as tatami mat bases are soft, can be freely cut, and allow for the creation of a storage compartment 9 of any size. When using multiple tatami mats, it is also possible to attach tatami mat side reinforcement material 8a. Since the material can be cut in single layers or multiple layers, storage compartments can be made to any size. For example, if a heating element is sandwiched between the baseboard and the tatami mat, a storage compartment can be created to accommodate the controller and wiring. There are no limitations on the structure, size, or number of storage compartments, but the important thing is to ensure that they have sufficient strength to function as storage compartments. It is not possible to create storage compartments in typical tatami mats. Creating storage in the tatami base would create a void beneath the surface, which is dangerous. However, tatami bases use subflooring, and their strength can be reinforced with additional materials. The ability to create storage compartments also differentiates these tatami mats from typical ones.

[0042] While not limited to pet owners, it is presumed that those with pets would prefer to avoid exposed wiring as much as possible due to the risk of pets tampering with it. Furthermore, with the tatami floor, it is possible to store ice packs etc. in storage compartment 9, enabling cooling without external wiring and zero energy costs. However, condensation prevention is important. Diatomaceous earth mats etc. can be used as a condensation prevention measure. There are no size restrictions for the tatami floor; it can be made from 1 tatami mat size to palm size, and there are no material restrictions. Reinforcement materials can be added and / or processed, allowing for customization. Similarly, for heating, in addition to using a heating element, it is possible to store hot water bottles or disposable hand warmers in storage compartment 9. The usage can be changed depending on the purpose, and the structure of the storage compartment can also be changed. For example, temperature control is difficult for reptiles, and although it varies depending on the species, they are generally sensitive to cold, and the ideal temperature for keeping them is often said to be between 25-32°C. However, if you use an air conditioner to regulate the temperature of the entire room, the utility costs will be high. Humans want to lower the temperature of their rooms with air conditioners in the summer heat, but if you want to maintain a temperature of 25-32°C where reptiles are kept, a tatami floor allows for localized heating, and cleaning can be done with detergent depending on the material of the surface sheet used.

[0043] Patent Document 1 also provides a storage recess for disaster prevention goods, but it is used from the underside of the tatami mat base, making it inconvenient to use. By making the surface sheet material detachable from the tatami mat base, it becomes possible to use it from the top surface of the tatami mat base. Furthermore, it is possible to reinforce the storage area with reinforcing material provided in the tatami mat base, and if the baseboard alone is not strong enough, it is possible to reinforce it using the tatami mat base reinforcing material 8 (which can be reinforced with the tatami mat base top surface reinforcing material 8b). There are no limitations on the number or size of storage areas, and it is possible to make them deeper by stacking tatami mats, so the depth of the storage area can be adjusted. If you want to make it lighter, you can use foam material for the tatami mat base and use the tatami mat base reinforcing material 8 to suppress deformation.

[0044] Let me explain Figure 3. In Figure 1, the side reinforcing rod 10 is shown with a rounded shape at one point, and the slope 11 has a triangular cross-sectional shape. However, there are no limitations on the shape of the side reinforcing rod 10, and Figures 3A, B, and C are also examples of the shape of the side reinforcing rod 10. Figures 3E and O show an example of attaching the side reinforcing rod 10 to two adjacent sides of a tatami floor.

[0045] Let's explain Figure 4. Figure 4A shows a two-dimensional cover 16, and Figure 4B shows a three-dimensional cover 16. For example, the cover 16 can be a flat cover 16 attached to the tatami floor as shown in Figure 4A, but it can also be a three-dimensional cover 16 attached to the tatami floor as shown in Figure 4B. Figure 4(i) shows an example of a three-dimensional cover 16, a cat house that fits a person inside a tatami mat-sized floor. By using a cover, it becomes easy to enjoy various changes. The cover can be used only on the top surface of the surface sheet material, or it can be screwed in from the sides; there are no restrictions on how it is attached. Using the cover or not is optional, and it is removable, so it can be added later. Depending on the material, it can be washed, ensuring a hygienic environment at all times.

[0046] The tatami floor of the present invention is a tatami floor as described in claim 1 or 2, characterized in that the tatami floor is used as a soundproofing material and / or a sound-absorbing material. With this configuration, by making it possible to use the tatami floor even when it is exposed, it becomes possible to use the tatami floor as a soundproofing material 19 and / or a sound-absorbing material 20. For example, if it can be used as a soundproof floor or sound-absorbing floor, or as a soundproof wall or sound-absorbing wall, it can also be used as a soundproof box or sound-absorbing box. There are no limitations on the materials or methods of use used as the soundproofing material 19 or sound-absorbing material 20, but it becomes possible to use the tatami floor as a new floor or wall separate from existing floors or walls. When using the tatami floor as a new wall, it is possible to separate it from existing walls, which also helps to block vibrations. Furthermore, it is possible to sandwich soundproofing or sound-absorbing materials between the baseboard and the tatami floor, or to attach them to the back surface of the baseboard, or to attach them to the outside of the tatami floor. Soundproofing materials use materials that reduce vibrations from the vibration source (sound source). For example, it is possible to achieve sound insulation using rubber materials, cushioning materials, plywood, gypsum board, etc. Sound-absorbing materials increase the friction surface area, so fine cotton-like fibers (glass wool, rock wool) or sponge-like materials with many small air bubbles (urethane foam) can be used. Cellulose fiber, in particular, is a material that is excellent not only in sound absorption but also in sound insulation and heat insulation. Due to its structure with many small holes, sound is scattered and strong reflections in a particular direction are eliminated, so the duration of the reflected sound (sustain) is shortened and the sound does not resonate as much. Originally, tatami flooring uses materials with excellent sound insulation and sound absorption properties such as surface sheets, subfloors and tatami mats, but it is also possible to add materials with even better sound insulation and sound absorption properties. For example, by using a hard baseboard and reinforcement made of a hard material, joint fittings can be used and fixed with screws, making it possible to assemble a tatami floor into a box. Furthermore, it is also possible to fix the tatami floor using support columns and assemble it into a box. Sound-absorbing materials are also effective in adjusting reflected sound, and urethane foam has excellent sound absorption as well as heat insulation properties. By using soundproofing material 19 and sound-absorbing material 20 on the tatami floor, low-cost soundproofing and sound absorption become possible.

[0047] The tatami floor of the present invention is a tatami floor according to claim 1 or 2, wherein the reinforcing material provided on the side surface of the tatami floor is a reinforcing material provided on the surface sheet material or the tatami floor, and is provided on at least one of the side surfaces of the tatami floor, and is a rod-shaped body or a slope (hereinafter simply referred to as a slope) having a downward slope toward the periphery of the tatami floor, and is fixed or detachably attached. With this configuration, by providing a rod-shaped body 10 or a slope 11 as a reinforcing material used on the side surface of the tatami floor, it has the effect of a protective material that prevents damage to the side surface of the tatami floor (an example of the installation of a rod-shaped body and a slope is shown in Figure 1). General portable tatami mats are placed in a frame to prevent damage, but there is a risk of gaps occurring between the frame material and the portable tatami mat, but by attaching a rod-shaped body or a slope to the tatami floor body, it is possible to prevent the occurrence of gaps. The rod-shaped body or slope is fixed or detachably attached and fixed to the side surface of the tatami floor. Furthermore, the rod-shaped body (Figure 3a) and the ramp may be attached to either the front or back side of the surface sheet material, or to the tatami base side. They may be attached directly to the tatami base, or fixed or detachably attached to the reinforcing material used for the tatami base, or they may be attached to the back of the surface sheet material, or they may be detachably attached to the reinforcing material used for the tatami base using hook-and-loop fasteners or magnets. If a hard material is used for the reinforcing material on the side of the tatami base, the rod-shaped body or ramp can be fixed with screws or the like. There are no limitations on the material or attachment method of the rod-shaped body or ramp, and they may be used on one side, or on two or more sides as shown in Figures 3d ande.

[0048] Conventional techniques for using removable tatami mats involved surrounding the perimeter of the mat with a frame. However, this frame was expensive, lacked flexibility, and, to facilitate installation, the inner dimensions of the frame were made slightly larger than the outer dimensions of the tatami mat, creating gaps that posed a safety hazard. In this invention, however, by fixing or detachably attaching a rod-shaped body to the reinforcing material used in the tatami base or the surface sheet material, the adhesion with the tatami base floor is increased, preventing gaps from forming even with long-term use, and improving the durability of the sides. Furthermore, the durability of the upper corners and corners, where damage to the surface sheet material is particularly concerning, is significantly improved.

[0049] Furthermore, by installing a ramp, wheelchair access becomes possible even when the tatami floor is used as a removable mat. In addition, the gradual elimination of steps also has the effect of preventing tripping. Prior art document 2 describes the invention of a tatami mat with an integrated ramp, but it requires advanced technology, the degree of incline is determined during the manufacturing stage of the tatami base, and the tatami base and surface are glued together, making it impossible to replace the surface. With tatami flooring, there are no restrictions on the material, shape, or installation method of the ramp. Commercially available ramps or ramps made to the desired slope can be used, and it is possible to revert to the original state without a ramp, allowing for flexible adaptation to changes in lifestyle. The ramp can be used on either the front or back side of the surface sheet material. For example, it is possible to use the ramp on the back side of the surface sheet material (shown in Figure 1). The material of the ramp is not limited to wood, foam material (including foamed polyethylene, etc.), resin, foamed rubber, etc., as long as it is a ramp. There are also no restrictions on the installation method. If a hard material such as wood is used as the ramp, it is possible to attach the ramp to the back of the surface sheet material 2, and it is also possible to reinforce the strength by attaching reinforcing material 7 to the back of the surface sheet material 2. It is also possible to use soft materials such as foam material as the ramp. The sides of the tatami floor and the sides of the ramp can be fixed or detachably attached and fixed. The surface sheet material can be extended using the protruding parts 6a and 7a. The ramp can also be fixed or detachably attached to the side of the tatami floor like a rod. There are no limitations on the material, shape, or mounting method of the ramp, but it is possible to integrate it with the tatami floor. The ramp can be removed and replaced, offering excellent long-term durability, improved visual integration, and thus a superior appearance. It is also possible to install reinforcing material 6 at the connection point between the tatami floor and the ramp. There are no restrictions on the material or installation method, but for example, fixing a metal material with screws will provide strength, while attaching cloth or resin will allow for simple reinforcement. It is also possible to attach ramp tip reinforcing material 12 to the part of the ramp tip that contacts the floor, which improves the degree of contact with the floor and enhances durability.

[0050] With conventional tatami mats, wheelchair use damages the surface, and a more significant problem is that the soft tatami base causes indentations due to the movement of the wheels. If insulation board is used in the tatami base, in the worst case, it may crumble and disappear after long-term use, causing indentations that make it difficult to move a wheelchair smoothly. This is a weakness of tatami, which is excellent at absorbing shock, and it is considered an unsuitable flooring material for wheelchair use. Tatami base flooring overcomes this weakness by attaching a baseboard to the back of the surface sheet material. Even with tatami base flooring used in an exposed state, wheelchair use becomes possible by using a ramp as reinforcement. Furthermore, with tatami base flooring that has an integrated ramp, even when installed on a hardwood floor, the step difference can be eliminated smoothly.

[0051] The tatami floor of the present invention is characterized in that, as described in claim 1 or 2, a cover is provided on the entire surface or a part of the tatami floor that can be fixed or detached. With this configuration, the cover also serves as a reinforcing material, but by using it as a cover, it is easy to change to a new functionality. By using a cover that can be fixed or detached on the entire surface or a part of the tatami floor, it is possible to easily enjoy various changes. There are no limitations on the material, size, functionality, or attachment method of the cover. It can be used on the entire surface or a part of the tatami floor, and it may be fixed or detachably attached to the top surface, side, or bottom surface of the tatami floor, and the attachment method may differ depending on the cover, and there are no limitations on the attachment method. As an attachment method for detachability, for example, hook-and-loop fasteners, magnetic sheets, magnets, hooks, screws, bolts, etc., can be used to easily attach and detach it. Alternatively, it may be wrapped like a futon cover, or elastic or strings may be attached to the cover as shown in Figure 4A. Tatami flooring can be arranged side-by-side or stacked. Multiple tatami flooring can also be combined into a single unit using a cover. Furthermore, by having several covers with different functionalities, it is easy to change to a tatami flooring with different functionalities. Several different covers can be used on a single tatami flooring simultaneously. For example, by attaching artificial turf and a soccer goal with a 3D cover, a mini soccer field can be created. Using a 3D cover as shown in Figure 4(i), it would be fun to create a space where you can play with cats that like small spaces.

[0052] If you want to use it for a long time, you can fix it in place with screws or similar fasteners. This prevents it from shifting, and if it's fixed with screws, it can be removed and replaced if it gets damaged. Also, if the cover is easily removable, you can easily change it to a tatami floor with a different function. Various covers are possible. Using artificial turf would allow for activities like putting golf or practicing swings, while using a rush mat as a cover would easily create a Japanese-style room. Shock-absorbing mats could be used to create a space for setting up exercise equipment. Furthermore, if the cover has train tracks printed on it, it could create a space where children can play with toy trains. While the cover also serves as reinforcement for the surface sheet material, using it to fix or detach from the entire or partial surface of the tatami floor would allow for a tatami floor with a wide variety of functions that can be easily changed. By installing a cover, damage to the surface sheet material is prevented, and the appearance can be easily changed by using a freely replaceable cover. If the material is washable, a clean environment can be maintained at all times. Furthermore, it is possible to cover multiple adjacent tatami floors as a single unit, which reduces the likelihood of separation, lateral shifting, and damage between the tatami floors, and has the advantage of superior long-term durability. It also has an excellent appearance.

[0053] There are no restrictions on the material, size, or method of attachment / detachment of the cover, but various materials can be considered, such as rugs, carpets, artificial turf, shock-absorbing mats, futons, sheets, drawing mats, picnic sheets, three-dimensional cat houses, three-dimensional soccer goals, etc. For example, if you use a straw mat as a cover, there are many types of commercially available mats, and various sizes from 1 tatami mat to 6 tatami mats, 8 tatami mats, etc., but unless it is custom-made, there are basic dimensions. If the tatami floor is roughly the same size or slightly larger, it can be used without any problems. Also, for example, if you use a 6 tatami mat size mat, it is possible to make 6 tatami floors into one unit. As for how to fix the mat, you can use staples with long legs, thumbtacks with long legs, or screws, but when you remove the cover, holes will remain in the tatami floor, so it is best to fix it in a place that will not be noticeable later. Alternatively, you can use hook and loop fasteners, magnetic sheets, or attach elastic or strings to the mat like a futon cover. Furthermore, with tatami flooring, it is possible to secure the cover to the sides and bottom, preventing it from curling up and providing a fall prevention measure. To prevent tripping due to snagging or the cover curling up, it is possible to sew cloth or trim to the edges of the mat and secure it to the sides and bottom. With flooring, carpets or rugs are sometimes used to combat cold and hardness, but anti-slip sheets are often used to prevent curling and snagging. There are no limitations on how covers are attached to tatami flooring; they can be secured using L-shaped brackets, three-sided corner brackets, etc., utilizing the baseboard and reinforcing materials used on the sides. Also, when you want to use a cover temporarily, you can attach elastic or strings to the four corners like a duvet cover, or you can attach it so that it covers the bottom as well. It is also possible to use tatami flooring as a mattress for bedding.

[0054] For example, as mentioned earlier, there are many types of artificial turf available as cover material. One tatami mat is sufficient for practicing golf swings, but if you have a slightly larger space, you can also enjoy putting golf. By preparing small, mountain-shaped protrusions of different shapes and placing them under the cover, you can enjoy a different course at any time. Putting cups that you simply place on the surface are also commercially available. It's easy to turn your room into a play area. The same applies to playing soccer; by using a smaller ball or one that doesn't bounce as much, or by using small objects like rice paddles instead of feet, and by using a net to create an enclosure, you can play even in a one-tatami mat space. Tatami flooring has soundproofing properties, but by using soundproofing and / or sound-absorbing materials, the echo will be further reduced. The cover not only provides reinforcement, but its material, size, and installation method are completely customizable, allowing for endless possibilities in how tatami flooring can be used.

[0055] There are no size limitations on the tatami flooring; smaller tatami flooring is easier to handle. For example, it's possible to make a cat house by reducing the size of the tatami flooring. Using hard material reinforcement on the sides allows for the use of screws to secure the three-dimensional cover 16. Also, using hook-and-loop fasteners or magnetic sheets as reinforcement makes the three-dimensional cover 16 easy to attach and detach. For example, it becomes possible to freely change the material between summer and winter. Typical cat houses are finished products and are usually replaced rather than modified, but if parts are interchangeable, arrangements become possible, and it's possible to create an original cat house like Figure 4-I that a human can also enter, allowing you to play with your beloved cat in a small space. The layout can also be changed later.

[0056] The tatami floor of the present invention is a tatami floor according to claim 1 or 2, characterized in that the surface sheet material of the tatami floor is provided with cut-out holes in the surface sheet material in the direction downward of the corners of the tatami floor to prevent damage to the corners. With this configuration, if the surface sheet material is fixed to the side of the tatami floor, just like the tatami surface of a typical borderless tatami, excess material will be generated at the corners. The excess material is folded and processed, but this makes it difficult to manufacture the surface sheet material so that it can be attached to and detached from the tatami floor. For this reason, the excess material that was folded (cut-out portion 22 of the surface sheet material shown by the diagonal lines) was cut off, but it was found that this resulted in tears occurring up to the area where the baseboard was attached to the surface sheet material. Through trial and error, it was found that providing holes distributes the force and prevents tears by processing to provide holes. The size of the holes and the distance from the base plate need to be adjusted depending on the material and thickness of the surface sheet material. There are no limitations on the size of the holes and the distance from the base plate; they should be determined by the material and thickness of the surface sheet material. Furthermore, there are no limitations on the processing method for the area around the holes, and an example of a processing method is shown in Figure 5.

[0057] Let's explain Figure 5. The surface sheet material in the corners of the tatami floor has cut-out holes to prevent damage to the corners. There are no limitations on the processing method of the surface sheet material near the holes, and Figures 5A, B, and C are examples. A provides a hole 17, and the length of the surface sheet material is set to be near the bottom corner of the side of the tatami floor, and the cut portion 22 of the surface sheet material, shown by the diagonal lines, is cut out. Part (i) has a hole 17, a cut-out portion 22 of the surface sheet material shown by the diagonal lines, and a bottom folded portion 23 of the surface sheet material that is the length of the surface sheet material and forms the bottom surface of the tatami floor. In the case of (U), a hole 17 is provided, and one side of the surface sheet material is made longer to create a side folded portion 24 of the surface sheet material, which is then covered by the side portion of the surface sheet material on the opposite side. In addition, although the length of the surface sheet material is near the bottom corner of the side of the tatami floor, there is no limitation, and a bottom folded portion 23 of the surface sheet material that extends to the bottom of the tatami floor may also be provided.

[0058] Figures 6 and 7 show test data from a public institution. The test was conducted on June 1, 2016, applying an impact compressive load (by a free-falling weight) to the test specimen via a spherical jig with a diameter of φ50 mm. Testing machine: Drop-weight type impact characteristic evaluation tester (Hayasaka Riko Co., Ltd.: HR-1387). Test room temperature: 25°C, test room humidity: 59%, weight: 50 N, drop height: 150 mm (from the surface of the test specimen).

[0059] Let's explain Figure 6. Test results: Tatami floor 1288N (composition: cushion floor 1.8mm + tatami floor 55mm + veneer 3mm) / flooring 3908N. These values ​​are measured values ​​and not guaranteed values. In the impact test data, the impact of the tatami floor was approximately 33% of that of the flooring material. This test result shows that tatami floor is a flooring material that is superior to board flooring (flooring material) in terms of impact absorption. For Japanese people who live without shoes, the impact from their feet is easily transmitted to their bodies, so a lower measured value indicates a flooring material that is gentler on the body. According to the Tokyo Fire Department website, 80% of indoor accidents involving the elderly that result in emergency transport are falls, and 40% are diagnosed with moderate to severe injuries requiring hospitalization. This situation highlights the importance of flooring materials that offer excellent shock absorption. As people age, wheelchair use increases, and consequently, renovations to flooring materials that do not sink are becoming more common, increasing the risk of falls. When care becomes necessary, the burden on the working generation increases, and the current situation where people are forced to leave their jobs to provide care is becoming a social problem. The flooring material that is needed is one that combines safety and functionality, is non-slip, has excellent shock absorption, is strong enough for wheelchair use, and does not sink. It is an ideal flooring material for preventing falls and reducing injuries in the event of a fall, and it is also important that it can be easily installed on existing flooring.

[0060] Let's explain Figure 7. The test data was collected with and without a tatami base. The 1.8mm cushion floor + 9mm veneer used in the test was the same; the only difference was the presence or absence of the tatami base. The test examined the difference in impact caused by the tatami base. With tatami base (tatami base floor) the impact was 1848N (composition: 1.8mm cushion floor + 9mm veneer + 55mm tatami base) / without tatami base the impact was 4714N (composition: 1.8mm cushion floor + 9mm veneer). Adding a tatami base reduces the impact by approximately 40%. What can be understood from these test results is the importance of the underlayment (tatami base) in impact mitigation. Typically, tatami flooring uses plywood with a thickness of 3mm to 4mm, and test data using 3mm plywood shows an even better result of 1288N.

[0061] The tatami floor of the present invention is characterized in that, in the tatami floor described in claim 1 or 2, the configuration can be freely assembled by providing and / or processing reinforcing materials to the surface sheet material, tatami floor, and subfloor. With such a configuration, the tatami floor can be modified by providing and / or processing reinforcing materials. For example, extension and changes in functionality can be made by using reinforcing materials in the surface sheet material. In tatami floors, a typical tatami mat has one tatami floor for each tatami mat surface (even if the size changes, such as 1 tatami, half tatami, etc., it is one tatami floor for each tatami mat surface), but in a tatami floor, if the height is approximately the same, it is possible to combine multiple units into one unit using the surface sheet material (due to the effect of the subfloor), and it is also possible to use multiple units as tatami floors. In a tatami floor, it is also possible to use cardboard boxes as tatami floors, for example, in the event of a disaster, it is possible to utilize cardboard boxes containing relief supplies that are sent. Cardboard boxes can be made smaller (cut in half and stacked, etc.), larger (docking two cardboard boxes together, etc.), taller, or shorter (cutting notches in the edges (height) of the cardboard box, etc.) by processing them, and their size can be freely changed depending on the ingenuity (processing methods can also be printed with diagrams to make them widely known). Cardboard boxes that would normally be discarded can be used to make beds, chairs, tables, etc. on tatami flooring. For example, reinforcing material that can be attached and detached can be applied to the part of the surface sheet material that protrudes from the baseboard (for example, both male and female parts of hook-and-loop fasteners can be applied to the surface sheet material in advance). The storage space for the surface sheet material is 1 tatami mat or half a tatami mat size (other sizes can also be made), and the thickness is the surface sheet material + baseboard (there are no restrictions on the materials used, but for example, if you use a cushion floor sheet of about 2 mm for the surface sheet material and a baseboard of about 3 mm, it will be about 5 mm), and they can be stacked, and a considerable number can be stored if stacked up to near the ceiling. Initially, simply distributing surface sheeting provides better insulation and hygiene than sitting directly on the floor of a gymnasium, and makes space allocation easier. There are no limitations on the material of the tatami base; cardboard (cardboard boxes, etc.), styrofoam, plastic cases, tatami mats, and other materials can all be used, and the surface sheeting can be adapted in various ways depending on your ingenuity.Strength can be adjusted later with reinforcing materials. Storage is possible by using cardboard boxes, plastic cases, etc., as the tatami base. The tatami floor can have its surface sheet removable, and the sides can be reinforced, allowing for access to stored items from the side. Various uses are possible by devising processing methods. Furthermore, by storing it together with an air mattress as disaster preparedness supplies, the air mattress can be used as the tatami base, its strength can be supplemented with a surface sheet, and using a thinner material than usual makes it more compact, reducing storage space. The details regarding the baseboard are described in paragraph 0064.

[0062] The tatami floor of the present invention is characterized in that, in the tatami floor described in claim 1 or 2, a notch or hole is provided in a part of the surface sheet material to which the baseboard is attached or in a part of the surface sheet material that protrudes from the baseboard. With this configuration, it becomes possible to insert and remove various objects sandwiched between the baseboard and the tatami floor or various objects stored in the storage section 9, and it is also possible to leave a part of the object exposed on the surface or side. For example, it is possible to embed a weighing scale, heating element (including a hot carpet), massage equipment, etc. in the tatami floor, and leave the display panel, control panel, etc. exposed, making it possible to use the object as an integrated part of the tatami floor. The exposed part can be adjusted with the tatami floor, surface sheet material, baseboard and reinforcing material, and it is also possible to use it in a nearly flat state on the top and sides. Furthermore, it is also possible to run cords, etc., out from the tatami floor.

[0063] For example, it's possible to install a weighing scale by embedding it into a tatami floor. You can choose between a visible installation where the top of the scale is exposed, or a concealed installation with a cover. This is one of the advantages of tatami flooring, as the depth of the storage area can be adjusted. A weighing scale can be an eyesore when left out in a room, but embedding it into a tatami floor allows for unobtrusive storage. The size can be freely adjusted, and there is no need for major construction work such as drilling holes in flooring; it can be installed on the floor. This is an advantage of tatami flooring that is not fixed to the room, and by using a removable tatami mat design, there are no limitations on where it can be installed. In the case of heating elements (including heated carpets), it is possible to expose the control panel. For example, commercially available heated carpets have a thick control panel, which can cause tripping hazards. However, by sandwiching the main unit between the baseboard and the tatami mat and exposing the control panel, it is possible to create a flat surface by adjusting the thickness of the surface sheet material, baseboard, and reinforcing material. Furthermore, by sandwiching the main unit between the baseboard and the tatami mat, there is no need to worry about it peeling up. When sandwiching the heating element, if a vinyl sheet material is used for the surface sheet material, it is possible to choose one with functionality compatible with underfloor heating, but it is also possible to use carpet material, and there are no restrictions on the material of the surface sheet material. In addition, the ability to route wiring (including plugs) on the side is another advantage of tatami flooring.

[0064] The tatami floor of the present invention is characterized in that, in the tatami floor described in claim 1 or 2, the underlayment is either a single piece or composed of multiple pieces, and is either without cutouts, with cutouts on one side, or with cutouts on both sides. With this configuration, the underlayment currently in use is a single piece, and its size is determined at the time of manufacture and it is used on a flat surface. However, by composing it with multiple pieces, the size can be changed (in the case of tatami floors, the size can also be changed in the surface sheet material and tatami floor by providing and / or processing reinforcing materials), and it is also possible to enlarge it. There are no limitations on the number and composition of the multiple pieces composed of, and if the purpose is to enlarge, it is possible to attach underlayment of the desired dimensions to the back of the surface sheet material. There are no limitations on the number, shape, and size of the pieces that make up the underlayment, and if reinforcement of the joints is necessary, it is also possible to use reinforcing materials. For example, if the composition of multiple pieces or the cutouts are like those of a wood carpet, it is possible to roll it up for storage and it is also possible to fold it. There are no limitations on the type of cuts that can be made; the size, depth, and shape can be adjusted according to the purpose. The shape can also be straight, mesh-like (square, hexagonal, triangular, etc.), wavy, or random, and it is possible to create raised areas or recesses. For example, if a massage device is placed between the baseboard and the tatami mat, it is thought that the cuts can be made to move in accordance with the movement of the massage device. By enabling flexible movement, a superior effect in shock absorption can be expected. Furthermore, to prevent damage to the baseboard, it is possible to attach a reinforcing material made of a flexible material to the baseboard. Possible materials include rubber, silicone, and other materials that stretch and return to their original shape. Even a baseboard without cuts is thought to flex and absorb shock when a load is applied, but a better effect can be expected by adding cuts. Attaching a reinforcing material made of a flexible material to prevent damage to the baseboard is also considered a way to further improve shock absorption in the event of a fall. It is a double safety net. If a single-piece base plate can be manufactured with cutouts and reinforcing materials, it will also reduce costs.

[0065] By incorporating reinforcing materials into all or part of the surface sheet material, tatami base, and subfloor, and / or applying special processing, tatami flooring can be used in a variety of ways, differentiating it from ordinary tatami and portable tatami mats. [Explanation of Symbols]

[0066] 1 tatami mat floor 2. Surface sheet material 3 Base plate 4 Tatami floor 5. Removable reinforcement 6. Reinforcement material (applied to the surface of the surface sheet material) 6a Protruding portion (Protruding portion of reinforcing material 6) 7. Reinforcement material (applied to the back of the surface sheet material) 7a Protruding portion (Protruding portion of reinforcing material 7) 8 tatami mat floor reinforcement material 8a Reinforcement material for the sides of the tatami mat base (reinforcement material for the sides of the tatami mat base) 8b Reinforcement material for the top surface of the tatami mat (reinforcement material for the top surface of the tatami mat) 8c Reinforcement material for the underside of the tatami mat base (reinforcement material for the underside of the tatami mat base) 8d Storage area reinforcement material (reinforcement material for the tatami floor storage area) 9 Storage compartment 10 Rod-shaped body 10A Rod-shaped object (rectangular) 10. Rod-shaped object (with a rounded end) 10. Rod-shaped object (trapezoidal shape) 11 slopes 12. Reinforcement material for the end of the ramp (attached to the part of the ramp that touches the floor) 13 Heating element 14 Impact Sensor 15. Objects (things to be placed between the baseboard and the tatami mat) 16 Cover 17 holes 18 screws, bolts, nails, staples 19 Soundproofing materials 20 Sound-absorbing materials 21. Anti-slip, anti-slip sheet 22 Cutting portion of surface sheet material 23. Folded portion of the bottom surface of the surface sheet material 24. Side folded portion of surface sheet material

Claims

1. A tatami floor, comprising a surface sheet material, a baseboard made of a hard material that can be used with nails or screws, and a tatami base, laminated in this order from top to bottom, wherein the surface sheet material and the baseboard are glued together, the surface sheet material is provided with an overhang portion from the baseboard when glued together with the baseboard for fixing to the tatami base, the surface of the tatami base and the back surface of the baseboard are not fixed together, and reinforcing material is provided and / or processed on all or part of the surface sheet material, the tatami base and the baseboard.

2. The tatami flooring according to claim 1, characterized in that the surface sheet material of the tatami flooring, the tatami flooring, and the reinforcing material provided on the subfloor and / or processed thereto, allows the surface sheet material to be fixed to or detached from the tatami flooring.

3. The tatami floor according to claim 1 or 2, characterized in that a heating element, an impact sensing element, or an object can be sandwiched between the subfloor and the tatami floor.

4. The tatami floor according to claim 1 or 2, characterized in that a storage compartment is provided in the tatami floor of the tatami floor.

5. The tatami flooring according to claim 1 or 2, characterized in that the tatami flooring is used as a soundproofing material and / or a sound-absorbing material.

6. The tatami floor according to claim 1 or 2, characterized in that the reinforcing material provided on the side surface of the tatami floor is a reinforcing material provided on the surface sheet material or the tatami floor, is provided on at least one of the side surfaces of the tatami floor, is a rod-shaped body or a slope having an inclination toward the periphery of the tatami floor, and is fixed or detachably attached.

7. The tatami flooring according to claim 1 or 2, characterized in that a cover that can be fixed or attached to the entire surface or part of the tatami flooring is provided.

8. The tatami floor according to claim 1 or 2, characterized in that the surface sheet material of the tatami floor is provided with cut-out holes in the surface sheet material in the direction downward of the corners of the tatami floor for preventing damage to the corners.

9. The tatami floor according to claim 1 or 2, characterized in that the structure can be freely assembled by providing and / or processing reinforcing materials to the surface sheet material, tatami floor, and subfloor board.

10. The tatami floor according to claim 1 or 2, characterized in that a notch or a hole is provided in a part of the surface sheet material to which the subfloor board is attached or in a part of the surface sheet material that protrudes from the subfloor board.

11. The tatami flooring according to claim 1 or 2, characterized in that the subfloor is made of either a single piece or multiple pieces, and is made of a material with no cuts, a material with cuts on one side, or a material with cuts on both sides.

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