Thin, simple tatami with shock-absorbing property

Abstract

To provide a thin, simple tatami with shock-absorbing properties that mitigates impact with excellent cushioning properties, as a tatami floor set, enabling infants, elderly persons, and persons with physical disabilities to act safely, while also being lightweight and portable.SOLUTION: As a measure to prevent injuries during activities in rooms with wooden floors, in order to increase the cushioning properties of a simple tatami floor, a 5-10 mm thick, bead-method polypropylene foam board material having shock-absorbing effects, as a first cushioning material, and a 5-10 mm thick, polystyrene foam board material holding thermal insulation and elasticity properties, as a second cushioning material, are used, sandwiching a stabilizing and fixing layer of polystyrene resin with glass fiber as a shape-retaining material in its intermediate section in a lower layer of an upper surface tatami cover.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] To provide a shock-absorbing, thin, simple tatami mat that can be laid in a room with a flooring, and that has excellent cushioning properties to absorb shocks and is lightweight and highly portable as a tatami floor set for safe movement by small children, the elderly, and physically handicapped people. [Background technology]

[0002] In general housing, the structure has become Western-style, with most rooms having wooden floors and very few rooms with tatami mats. On the other hand, there are also people who want to live in a Japanese-style lifestyle with tatami mats in a room with wooden floors, and they may also want to adopt a sitting lifestyle. Sitting directly on the floor makes your legs hurt and is uncomfortable, so they want to sit, sleep, and spend time on tatami mats. As for floor coverings, there are products that use brushed fabric, carpets with flooring or insoles, and unit mats with tatami mat coverings (woven rush grass, etc.), but at such times, people may want to use various tatami-style floor coverings so that they can sit or lie down in the appropriate places.

[0003] Tatami mats have been used in Japan since ancient times as a flooring material, and even in recent years, tatami floors are widely used in Japanese-style architecture, including homes, as well as in martial arts halls and gymnasiums suitable for judo and aikido. In addition, floors are often used in ordinary homes, and in the homes of young children, the elderly, and physically disabled people, there is a demand for tatami rooms with excellent cushioning to reduce shocks in order to increase safety when they are active within the rooms. The performance required for tatami mats used indoors includes moisture absorption and release, sound absorption, thermal conductivity, shock absorption, rigidity, softness, and durability. When used in sports such as judo, it is important to have both sufficient rigidity so that the feet do not sink even when a large load is applied, and shock absorption that can fully absorb the impact when slammed into the tatami mat with a throwing technique (see Patent Document 1).

[0004] A particularly damp-resistant tatami mat can be made by simply gluing the cushioning material layered on top of the tatami floor, and can disperse shocks sufficiently while having a sturdy overall structure. This tatami mat is made by gluing a cushioning material made of cross-linked polyethylene to the top of the tatami floor, and gluing a tatami surface made of vinyl chloride to the top of the cushioning material. By forming the cushioning material from cross-linked polyethylene, softness can be ensured, and by making the cushioning material about 5 mm thick, sinking can be prevented. It has been proposed that gluing can be done by applying an adhesive by spraying (see Patent Document 2).

[0005] It has become possible to improve the durability of tatami mats and judo tatami mats while improving their ease of maintenance, and to reduce the environmental impact when they are disposed of.The tatami mat surface contains an olefin-based elastomer having crystalline polypropylene and non-crystalline propylene-ethylene-α-olefin copolymer, and it has been reported that the tatami mat surface contains an olefin-based elastomer having crystalline polypropylene and non-crystalline propylene-ethylene-α-olefin copolymer (see Patent Document 3).

[0006] Another example of a tatami mat with excellent shock absorption, breathability and thermal conductivity is a shock-absorbing tatami mat that has a tatami floor and a tatami facing that covers the surface of the tatami floor, the tatami floor is provided with an elastic cushion layer and has multiple through holes that penetrate the front and back surfaces. An elastically deformable protective pipe is attached to the inner peripheral surface of the through holes, and a hollow drill is used to drill the through holes, allowing for a stable operation of drilling holes continuously (see Patent Document 4).

[0007] Furthermore, as a tatami mat having an intermediate layer formed of an elastic foam that enhances shock absorption while maintaining appropriate flexibility and hardness (not too soft), a flexible tatami mat is characterized in that voids are formed on at least one of the contact surfaces between the upper and lower surfaces of the intermediate layer and the adjacent layers in the laminated structure that constitutes the tatami mat.It has also been proposed that the area void ratio of the voids is 10% to 50% of the entire contact surfaces on the upper and lower surfaces of the intermediate layer (see Patent Document 5).

[0008] Tatami flooring is used to improve safety and comfort in the lives of young children, the elderly, and physically disabled people, or for sports. It has a cushioned middle layer, and aims to improve cushioning between the upper or lower adjacent layers of the middle layer. In particular, when a person falls, a large impact is received, so a structure that can absorb this impact and has excellent strength is required. A certain degree of softness and flexibility is required because athletes and others feel pain. A special development aimed at solving these problems foam There are not many tatami mats that can absorb shock using polypropylene foam. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2013-124489 A [Patent Document 2] Utility Model Registration No. 3170957 [Patent Document 3] JP 2016-69816 A [Patent Document 4] JP 2017-115562 A [Patent Document 5] JP 2013-124489 A Summary of the Invention [Problem to be solved by the invention]

[0010] In ordinary homes, childcare facilities, nurseries, and welfare facilities for the elderly, people often gather on chairs and other items on wooden floors without tatami rooms. When people sit, talk, play, or play games in such facilities and places, conventional tatami mats laid on wooden floors have the following problems. When ordinary tatami mats are laid widely, each one is heavy, and once laid, they are difficult to move around. On wooden floors, it is difficult to rearrange the room by laying tatami mats or removing them for a carpet. Also, no matter how many tatami mats using tatami mats are connected, they do not look good and are merely substitutes for tatami mats. It is particularly difficult to carry a small and lightweight set and lay it in various desired places. Therefore, it is desirable to lay a small, lightweight, portable tatami mat over a certain amount of space.

[0011] From the above viewpoint, there have been disclosed configurations for tatami flooring that increase safety and enjoyment when young children, the elderly, or the physically disabled are moving around indoors, and for use in sports such as judo, that have an intermediate layer made of elastic foam and have a layer with enhanced cushioning formed between the upper or lower surface of the intermediate layer and the adjacent layer, thereby mitigating the force of impact; however, these configurations are not sufficient in terms of effectiveness. In particular, when young children, the elderly, or the physically disabled fall in a small house, their bodies receive a large shock, so to prevent this, tatami surfaces are required to have a structure that absorbs this shock and has high cushioning properties. Also, in sports such as judo, if the surface of the tatami is hard, athletes will feel pain and break bones when they fall. Therefore, a certain degree of softness is necessary for the tatami floor, but if it is too soft, the surface will sink in and athletes will be more likely to sprain their ankles.

[0012] Furthermore, standard judo tatami mats are usually manufactured by layering and sewing together the various components that make up the judo tatami mat, and a regular tatami surface is used for the surface of the judo tatami mat. In this case, if the tatami surface is covered with a thin sheet of polyvinyl chloride, the corners and edges of the judo tatami mat will become deformed when the tatami surface is sewn together. Furthermore, the corners and edges are easily worn down by movement. Therefore, if these are repaired and the sewing is repeated, these parts of the tatami mat will be more likely to sink in one layer. To solve this problem, reinforcing materials made of hard materials are placed at the corners, but if this hard reinforcing material breaks due to impact, it can cause serious injury. There are also tatami mats that have been laminated on the surface by gluing, but these require a large pressure to be pressed and fixed in place during the gluing process, so large-scale pressing machines are needed. Furthermore, processing is required to form the adhesive layer in advance, making it difficult to laminate by gluing with simple operations.

[0013] The present invention was made in consideration of these circumstances, and aims to provide a tatami mat for judo that has a tatami floor that can adequately disperse shock while allowing the cushioning material layered on top of the tatami floor to be bonded in a simple manner and has a sturdy structure overall. Shock-absorbing tatami mats are difficult to deform when a load is applied to the middle layer, and it is difficult to adequately absorb shock. In addition, moisture is easily trapped on the underside of shock-absorbing tatami mats, which makes it easy for mold to grow. When using tatami mats in an environment with floor heating used in ordinary homes, mold is likely to grow due to the floor heating, and there is a problem that the warm air from the floor heating does not reach the surface of the tatami mat sufficiently. Therefore, another challenge is to provide a tatami mat with excellent shock absorption, breathability, and thermal conductivity.

[0014] For this reason, tatami mats generally need to be wiped off before use, and the maintenance of cushioned tatami mats is not very high. Also, tatami mats treated with resin components lose their flexibility gradually due to the elution of plasticizers, resulting in insufficient durability. The present invention has been made to solve the above problems, and aims to provide a shock-absorbing tatami mat that is easy to maintain, has improved durability in terms of insulation, and reduces the environmental impact when it is disposed of. [Means for solving the problem]

[0015] In order to increase the cushioning and safety of lightweight, thin tatami flooring as a measure against injuries caused by activities in a room with flooring, a 5-10mm thick bead-method developed material with shock-absorbing properties is used as the first cushioning material under the upper tatami surface. foam Polypropylene foam board and 2 to 10 mm thick foam board that has thermal insulation and elasticity as a second cushioning material. foam This is a shock-absorbing, thin, simple tatami mat that is a cushioned tatami floor with a thickness of 20 mm or less, in the range of 15 to 20 mm, and is made of polystyrene foam board material with a stable fixing layer of sandwiched polystyrene resin in the middle, sandwiched between glass fiber, a shape-retaining material that prevents warping and provides high elasticity.

[0016] The tatami mat has excellent cushioning properties to absorb shock, and is also lightweight and highly insulating. The surface layer of the tatami mat is made up of a surface sheet with load dispersion properties and a layer of spherical particles with a diameter of 2 to 8 mm. foam Polypropylene is pressure-molded into a plate-shaped material with a thickness of 5 to 10 mm, and is a shock-absorbing material that is developed using the bead method and accounts for more than 20% of the layering ratio of tatami mats. foam The cushion layer is made of polypropylene, a stabilizing layer of reinforced polystyrene resin sandwiched between glass fibers to prevent warping, and a heat insulating and elastic layer. foam It is a laminate consisting of a cushion layer II of polystyrene foam and finally a protective sheet of polyolefin fiber cloth that promotes the retention of tatami properties. A seven-layer laminate is formed on the surface of the laminate with continuous through stitches of sewing thread at intervals of 50 to 100 mm in the vertical direction and a width of 30 to 80 mm, and a tatami surface is wrapped around the top surface of the laminate to form a tatami-shaped body.

[0017] The tatami mat is made of a first bead-method expanded polypropylene foam board layer, a sandwich-shaped glass fiber-attached polystyrene resin layer, and a third foam board layer, which are arranged in the order above the backing material of the tatami mat. foam The main components are polystyrene foam board layers, and each layer is sewn through to form a seven-ply laminate with dimensions of 15 to 20 mm thick, 300 to 1000 mm long, and 300 to 1000 mm wide. Each tatami-shaped piece mainly consists of an impact-resistant expanded polypropylene foam board layer and a shape-retaining sandwich-type glass fiber-attached polystyrene resin layer, and weighs 3 kg or less, making it suitable for use in residential floors for infants and the elderly, and for tatami flooring in nursing homes.

[0018] Tatami mats used in flooring rooms and bead-made tatami mats foam The cushion layer is made of polypropylene, a stable layer of reinforced polystyrene resin sandwiched between glass fibers, and a heat insulating and elastic elastomeric layer. foam The laminate is 15-30mm thick and made of a polystyrene foam cushion layer II and a polyolefin fiber cloth protective sheet that promotes the retention of tatami properties. A thin, stable, fixed layer of polystyrene resin sandwiched between glass fibers is used to form a square tatami mat with dimensions of 300-1000mm in length and width, and a rectangular tatami mat with a width of 150-500mm, which is half the width of the square tatami mat, weighing 1-3kg per mat. The square tatami mats and rectangular tatami mats are appropriately arranged to form a square or rectangular flooring tatami mat. A non-slip mat is applied to the non-woven fabric on the back of each tatami mat to immobilize the flooring. The set of 4-16 tatami mats in total is laid on the flooring to a depth of 0.5-10m. 2 and the entire set weighs less than 30kg. Effect of the Invention

[0019] In childcare centers, daycare centers, and even welfare facilities for the elderly, people can sit on chairs and talk, play, and play games in facilities and places where they gather, without tatami rooms and with wooden floors. Conventional tatami mats laid on wooden floors have the following problems. Regular tatami mats are light in weight per sheet when laid out widely, and can be easily moved once laid out. Tatami mats are easy to remove from wooden floors and rearrange the room, look good, and change the atmosphere of the room. They are particularly small and lightweight, so they can be carried and laid in various desired locations. They are small and can be laid out over a certain area.

[0020] The tatami mat has an intermediate layer made of elastic foam, and the upper or lower side of the intermediate layer is made of a bead-method-developed material that provides enhanced cushioning between the adjacent layers. foam By forming a polypropylene foam board layer, the tatami flooring enhances safety and comfort for small children, the elderly, and the physically handicapped when they are moving around indoors, and also absorbs the force of impact when used in sports such as judo. In particular, when small children, the elderly, and the physically handicapped fall in a small house, they are less likely to receive a large shock to their bodies. The tatami surface also has a structure that absorbs the shock when falling and has high cushioning properties. In particular, in sports such as judo, if the surface of the tatami is hard, athletes are less likely to suffer pain and fractures when they fall.

[0021] According to the present invention, the tatami mat is laminated from above using the beads method. foamPolypropylene foam cushioning is used on the top surface in an appropriate area, and can be sewn together with the stabilizing material in a simple manner, making it possible to form a stable laminate of five layers of material without using large-scale crimping machines, and by stitching the front and back of the core material of the tatami mat bed with sewing thread, tatami mats can be manufactured in a short amount of time with good workability. In addition, the tatami mat bed as a whole is lightweight, insulated, and sturdy, yet has a structure that can fully disperse impacts, allowing air to circulate between the top and bottom of the tatami mat, making it possible to effectively release moisture on the bottom side, and also absorbing large impacts by deforming the surrounding areas due to its rigidity when an impact is applied. [Brief description of the drawings]

[0022] [Figure 1] A perspective view and structural diagram of the shock-absorbing thin and simple tatami mat of the present invention. A: A perspective view of the entire tatami mat. B: A diagram showing the structure of the tatami mat. [Diagram 2] A cross-sectional view showing the structure and composition of the laminate of the impact-absorbing thin, simple tatami mat of the present invention. A: Impact-absorbing tatami mat composition cross-section (enlarged) B: Back surface diagram [Diagram 3] Structural diagram of the foamed polypropylene made by the beads method in the shock-absorbing tatami mat of this invention [Figure 4] A diagram showing the state of the shock-absorbing thin, simple tatami mat of the present invention when used as a floor covering. When used in a children's floor room. [Diagram 5] The diagram shows the apparatus used to measure the warping and shock absorption of the shock-absorbing thin, simple tatami mat of the present invention. A: Apparatus for measuring shock absorption (impact force) B: Apparatus for measuring warping [Figure 6] FIG. 6 is a schematic diagram of the samples (shock-absorbing thin, simple tatami sample of the present invention and a regular sample) used in FIG. 5 without the tatami surface. A: Shock-absorbing thin, simple tatami sample B: Regular sample DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In order to clarify the implementation of the present invention, the following description will be given with reference to Figs. 1 to 5. As shown in Figs. 1 and 2, the shock-absorbing tatami mat is made of a first bead-method expanded polypropylene foam board layer, a second insulation board layer or a sandwich-type glass fiber-attached polystyrene resin layer, and a third foam layer. foam The main components are a polystyrene foam board layer and a five-ply laminate with a through stitching. In particular, the first bead method expanded polypropylene foam board layer shows a high impact absorption effect, as shown in the examples. EXAMPLES

[0024] As shown in Figure 1B, in order to increase the cushioning of the tatami floor, a 7 mm thick bead-method sintered mat with shock-absorbing properties is used as the first cushioning material under the upper tatami surface. foam Polypropylene foam board and 5mm thick foam board that has thermal insulation and elasticity as a second cushioning material. foam The tatami mat was a thin, shock-absorbing tatami mat 21 mm thick, made of polystyrene foam boards sandwiched between glass fibers and a 6 mm thick stabilizing layer of polystyrene resin in the middle.

[0025] The tatami has excellent cushioning properties to absorb shocks, and is also lightweight and highly insulating. The tatami has a 1mm thick nonwoven fabric surface sheet with load dispersion properties underneath the surface layer, and a shock absorbing material developed using the beads method. foam The cushion layer is made of polypropylene, a stable layer of reinforced polystyrene resin sandwiched between glass fibers, and a foam layer with shape retention, heat insulation, and elasticity. foam A laminate consisting of a polystyrene foam cushion layer II and finally a protective sheet of polyolefin fiber cloth that promotes the retention of tatami properties was made into a five-layer laminate, sewn lengthwise and widthwise at equal intervals of 70 mm with 2 mm diameter sewing thread as shown in Figure 2B, and a 3 mm thick tatami facing was wrapped around the top surface of the laminate to form the tatami-like body shown in Figure 2A.

[0026] The tatami mat is made of a first expanded polypropylene foam board layer, a second sandwich-shaped glass fiber-attached polystyrene resin layer, a third expanded polypropylene foam board layer, and a fourth expanded polystyrene foam board layer. foam The main layer of polystyrene foam board is a five-ply laminate with each layer sewn through, and the dimensions are 20 mm thick, 900 mm long, and 900 mm wide, and each tatami-shaped piece weighs 1.9 kg. foam As shown in Figure 3, the polypropylene foam plate is made of spherical particles with a diameter of 3 to 6 mm. foam It was made of polypropylene and was a compression molded product with a thickness of 7 mm.

[0027] Beads Law foam In order to clarify the effect of the polypropylene foam board and the sandwich-shaped glass fiber-attached polystyrene resin layer, the basic shock absorbing material (the first cushioning material developed by the beads method) of the shock absorbing thin simple tatami mat of the present invention was used excluding the tatami mat surface. foam Polypropylene foam board and second cushioning material foam The impact absorption amount, i.e., impact force, was measured by comparing a layer of polystyrene resin sandwiched between polystyrene foam board and glass fiber with a commonly used insulation board layer of the same thickness. The method used was to drop a 10kg, 40mm diameter weight from a height of 10cm, and measure the impact force from the rebound deceleration. The measurement device is outlined in Figure 5-A, and the results are shown in Table 1. As shown in Table 1, it was revealed that the shock absorption of normal thin tatami mats was improved by more than 23%. Also, the tatami mats showed an improvement of about 13% in bending. [Table 1] TIFF2025085562000010.tif27156*A 10kg, 40mm diameter weight is dropped from a height of 10cm, and the impact force is calculated from the rebound deceleration. N=G*mass*9.8 G: Measured deceleration

[0028] The deflection was measured using the load application device shown in Figure 5-B. Shock absorbing beads foam As a polypropylene foam board, the tatami mat shown in Figure 3 was used, and spherical particles with a diameter of 2 to 8 mm were generated. foam Polypropylene is pressure molded into a plate-like material 5 to 10 mm thick, 900 mm wide and 900 mm long, and the amount of deflection is improved by a stabilizing layer of polystyrene resin sandwiched between glass fibers. Compared to a thin tatami mat that is normally used, the effect of preventing warping due to pressure and the rebound effect from dropping a steel ball and a soft ball were measured. By using these two special materials, the warping was greatly reduced, and the elastic modulus and impact absorption rate (impact force) were also greatly improved, improving performance. This is the first cushioning material developed using the beads method of the present invention. foam Polypropylene foam board and second cushioning material foam It was evaluated that the impact absorption and stabilization effects were greatly improved by the polystyrene resin layer sandwiched between the polystyrene foam plate and glass fiber.

[0029] The amount of deflection is reduced by more than 15% due to the sandwich-type glass fiber polystyrene resin layer, and the impact absorption capacity is superior to that of the beads method. foam It was revealed that the synergistic effect of the polypropylene foam board and the sandwiched glass fiber-reinforced polystyrene resin layer resulted in an improvement of more than 32% compared to a board that did not contain the polypropylene foam. The bead method is used to determine the layering ratio of the tatami floor. foam The shock-absorbing thin, simple tatami mat, which is made up of more than 50% polypropylene foam board and sandwich-type glass fiber-attached polystyrene resin layer, was laid in a set of nine sheets on the floor of a house in a children's room, as shown in Figure 4. It was safe and effective against various children's actions in this room, and was widely applied. EXAMPLES

[0030] As in Example 1, in order to improve the cushioning and safety of the lightweight, thin tatami floor, an 8 mm thick bead-method sintered mat with shock absorbing properties was used as the first cushioning material under the upper tatami surface. foam Polypropylene foam board and 7mm thick foam board that retains heat insulation and elasticity as a second cushioning material. foam The 23mm thick cushioned tatami mat is a shock-absorbing, thin, simple tatami mat made of polystyrene foam boards with a 7mm thick stable fixing layer of polystyrene resin sandwiched in the middle with glass fiber to prevent warping and to retain the shape with high elasticity.

[0031] The tatami mat has excellent cushioning properties to absorb shocks, and is also lightweight and highly insulating. The surface layer of the tatami mat is made up of a surface sheet with load dispersion properties, and a foam made of spherical particles with a diameter of 5 to 8 mm. foam Polypropylene is pressure-molded into a plate-shaped material with a thickness of 5 to 10 mm, and is a shock-absorbing material that is developed using the bead method and accounts for more than 20% of the layering ratio of tatami mats. foam The cushion layer is made of polypropylene, a stabilizing layer of reinforced polystyrene resin sandwiched between glass fibers to prevent warping, and a heat insulating and elastic layer. foam A laminate was formed consisting of a cushion layer II of polystyrene foam and finally a protective sheet of polyolefin fiber cloth which promotes the retention of tatami properties. The entire surface of the laminate was continuously sewn with 2mm diameter linen sewing thread at 60mm intervals in the vertical direction to form an adhesive-free integrated laminate, and a tatami facing was wrapped around the top surface of the laminate as the surface layer to form a tatami-shaped body.

[0032] The tatami mat is made of a first bead-method expanded polypropylene foam board layer, a sandwich-shaped glass fiber-attached polystyrene resin layer, and a third foam board layer, which are arranged in this order above the backing material of the tatami mat. foamThe main components are polystyrene foam board layers, and each layer is a 7-ply laminate with a sewn through structure, with a tatami-shaped body measuring 23 mm thick, 800 mm long, and 800 mm wide. Each tatami-shaped body is mainly made of an impact-resistant expanded polypropylene foam board layer and a shape-retaining sandwich-type glass fiber-attached polystyrene resin layer, and weighs 1.8 kg, making it suitable for use as a tatami floor for the elderly or caregivers on residential floors. Also, the same performance as in the example was obtained. EXAMPLES

[0033] The impact-absorbing thin, simple tatami mat, manufactured using the same product and manufacturing method as in Example 1, is made of tatami mat surfaces used in rooms with flooring and bead-processed tatami mats. foam The cushion layer is made of polypropylene, a stable layer of reinforced polystyrene resin sandwiched between glass fibers, and a heat insulating and elastic elastomeric layer. foam The laminate, consisting of a polystyrene foam cushion layer II and, finally, a protective sheet of polyolefin fiber cloth which helps to maintain the tatami properties, was 20 mm thick, and the dimensions of the laminate were a square tatami mat with a length and width of 800 mm, and a rectangular tatami mat with a width of 400 mm and a length of 800 mm, half the width of the square tatami mat, weighed less than 1 kg per sheet, and performance similar to that of the Examples was obtained. The square tatami mats and rectangular tatami mats are arranged in a square shape to create a square flooring tatami mat set. The square tatami mats and rectangular tatami mats are arranged in a square shape to create a square flooring tatami mat set. Double-sided adhesive non-slip material is applied to the non-woven fabric on the back of each tatami mat to immobilize the flooring. The set of 12 tatami mats is laid on the flooring to a length of 6m. 2 The area was about 100m² and the total weight of the set was less than 19kg. This was used in a nursing home. [Explanation of symbols]

[0034] 1. Shock-absorbing tatami mat 2 Tatami mat surface 3 Tatami floor 4 Cushion layer I 5 Cushion layer II 6 Protective Sheet 7 Load distribution sheet 8 Stable fixed layer 9 Surface layer 10 Laminated body 11 Insulation board 12 Beads method expanded polypropylene foam 13 Shock absorbing layer 14 rounds foam polystyrene 15 Expanded polypropylene particles 16 Polystyrene resin sandwiched with glass fibers 17 Continuous thread stitching 18 Polystyrene resin sandwiched with glass fibers 19 Tatami-like material made by rolling up the tatami mat surface 20th Floor 21 Wall 22 Measurement stand 23 Speed ​​measuring device 24 Measuring table 25 Falling weight frame 26 tatami mat test specimen 27 Pressure Head 28 Pressure rod 29 Fulcrum bar 30 measuring points (dial gauge)

Claims

1. To increase the cushioning and safety of lightweight, thin tatami flooring as a measure against injuries that may occur during activities in a room with a wooden floor, this shock-absorbing, thin, simplified tatami mat is characterized in that the underlayer of the upper tatami surface is made of a 5-10mm thick bead-method expanded polypropylene foam plate with shock-absorbing properties as the first cushioning material, a 2-10mm thick expanded polystyrene foam plate with heat insulation and elasticity as the second cushioning material, and a stable fixing layer of sandwiched polystyrene resin sandwiched between glass fibers as a shape-retaining material to prevent warping and provide high elasticity, in the middle, resulting in a cushioning tatami flooring of 20mm or less in thickness.

2. The shock-absorbing thin, simple tatami mat described in claim 1 is characterized in that the tatami mat has excellent cushioning properties to absorb shock, is lightweight and has high thermal insulation properties, and is made by compressing and molding expanded polypropylene spherical particles with a diameter of 2 to 8 mm into a plate-shaped material with a thickness of 5 to 10 mm under the surface of the tatami mat surface, and is made of a cushion I layer of expanded polypropylene using the bead method, which has shock-absorbing properties and accounts for 20% or more of the layering ratio of the tatami mat floor, a stabilizing layer of reinforced polystyrene resin sandwiched between glass fibers to prevent warping, a cushion layer II of expanded polystyrene foam with thermal insulation and elasticity, and finally a laminate consisting of a protective sheet of polyolefin fiber cloth that promotes the retention of tatami properties, and the surface of the laminate is sewn with continuous thread in the vertical direction at intervals of 50 to 100 mm and a width of 30 to 80 mm to form a 7-layer laminate, and the tatami mat surface is wrapped around the top surface of the laminate as the surface layer.

3. The tatami floor is mainly composed of a first bead method expanded polypropylene foam board layer, a sandwich-type glass fiber-attached polystyrene resin layer, and a third expanded polystyrene foam board layer, in that order above the back material of the tatami surface, with each layer being sewn through to form a 7-layer laminate, with the dimensions of a tatami-shaped body having a thickness of 15 to 20 mm, a length of 300 to 1000 mm, and a width of 300 to 1000 mm, and the weight of each tatami-shaped body mainly composed of an impact-resistant expanded polypropylene foam board layer and a shape-retaining sandwich-type glass fiber-attached polystyrene resin layer is 3 kg or less, making it suitable for use in rooms for infants and the elderly on residential floors and for tatami floors in nursing homes.

4. The tatami mat surface used in rooms with flooring is made of a cushion I layer of polypropylene foamed using the bead method, a stable layer of reinforced polystyrene resin sandwiched between glass fibers, a cushion II layer of foamed polystyrene foam with heat insulation and elasticity, and finally a protective sheet of polyolefin fiber cloth that promotes the retention of tatami characteristics. The laminate is 15 to 30 mm thick, and the thin stable fixing layer of polystyrene resin sandwiched between glass fibers forms a square tatami mat with dimensions of 300 to 1000 mm in length and width and 150 to 500 mm in width, which is half the width of the square tatami mat.

3. The shock-absorbing, thin, simple tatami mat according to claim 1 or 2, characterized in that it is made up of 4 to 16 square or rectangular tatami mats, each of which is a rectangular tatami mat with a diameter of 1.0 mm and weighing 1 to 3 kg, and the square tatami mats or rectangular tatami mats are appropriately arranged to create a square or rectangular flooring tatami mat set, with an anti-slip material attached to the nonwoven fabric on the back side of each tatami mat to immobilize the flooring, and the set of 4 to 16 tatami mats in total covering an area of ​​0.5 to 10 m2 on the flooring, with the weight of the entire set being 30 kg or less.

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