Shock-absorbing thin and easy-to-fold mat

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] The present invention relates to a tatami mat laid on a flooring room, which is provided as a tatami floor set with excellent cushioning properties to relieve impacts, being lightweight and highly portable, so that infants, the elderly, or the physically disabled can move safely, and relates to the provision of a shock-absorbing thin and simple tatami mat.

Background Art

[0002] In general houses, the interior is a Western-style building, and the floor is made of flooring in most rooms, with very few tatami rooms. On the other hand, there are times when one wants to live in a Japanese-style tatami room in a room with a flooring floor and also wants to adopt a sitting lifestyle. Sitting directly on the flooring makes the legs and the like hurt immediately and the sitting comfort is poor, so one comes to have the desire to sit, sleep, or spend time on a tatami mat. As floor coverings, there are products using raised-pile fabrics, tatami mats for laying or underlaying carpets, and unit mats with a tatami surface (such as rush-woven fabrics) as the surface material. At that time, there is a desire to use various tatami-form floor coverings so that one can sit or lie down at appropriate places.

[0003] Tatami mats have been used as floor materials in our country since ancient times. Even in recent years, tatami floors are widely used in Japanese-style buildings including each household, and also in martial arts halls and gymnasiums suitable for judo and aikido. Also, in general households, there are many floor floors. When infants, the elderly, or the physically disabled live in the family and move within the room, a tatami room with excellent cushioning properties to relieve impacts is desired to enhance safety. The performance required for tatami mats used indoors includes moisture absorption and desorption, sound absorption, heat conductivity, shock absorption, rigidity, flexibility, durability, etc. 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 to sufficiently absorb the impact when struck against the tatami mat during throwing techniques, etc. (see Patent Document 1).

[0004] Particularly as a shock-absorbing tatami, it is possible to adhere a cushioning material laminated above the tatami floor in a simple manner, and as a tatami equipped with a tatami floor that can sufficiently disperse impacts while having a robust overall structure, a cushioning material made of cross-linked polyethylene is adhered above the tatami floor, and a tatami surface made of vinyl chloride is adhered above the cushioning material. By forming the cushioning material from cross-linked polyethylene, softness can be ensured, and by setting the thickness of the cushioning material to about 5 mm, sinking can be prevented. It has been proposed that the adhesion can be performed by spraying an adhesive (see Patent Document 2).

[0005] As a tatami surface and a judo tatami, it is possible to improve durability while improving maintainability and reduce the environmental load during disposal. The tatami surface includes an olefin-based elastomer having crystalline polypropylene and an amorphous propylene-ethylene-α-olefin copolymer, and it has been reported that it is provided with a tatami surface including an olefin-based elastomer having crystalline polypropylene and an amorphous propylene-ethylene-α-olefin copolymer (see Patent Document 3).

[0006] Also, as a tatami excellent in shock absorption, breathability, and heat conductivity, it is a shock-absorbing tatami having a tatami floor and a tatami surface covering the surface of the tatami floor. As the tatami floor, it is provided with an elastic cushioning layer, and a plurality of through holes penetrating the front and back surfaces are formed. An elastically deformable protective pipe is attached to the inner peripheral surface of the through hole, and by using a hollow drill for a drill that drills through the through hole, the operation of continuously drilling holes is stably carried out (see Patent Document 4).

[0007] As a tatami having an intermediate layer formed of an elastic foam that maintains an appropriate flexibility and hardness without being too soft and enhances shock absorption, the flexible tatami is characterized in that voids are formed in at least one of the contact surfaces with adjacent layers on the upper and lower surfaces of the intermediate layer in the laminated structure constituting the tatami. And it has been proposed that the area porosity of the voids is 10% to 50% with respect to the entire contact surface on the upper and lower surfaces of the intermediate layer (see Patent Document 5).

[0008] For tatami floors used by infants, the elderly, the disabled, etc. to enhance safety and pleasure in life, or for tatami floors used in sports, it has an intermediate layer that forms a cushion layer, and aims to enhance the cushioning property between the intermediate layer and the adjacent layer on the upper or lower surface side. Especially when falling, a large impact is received, so it is necessary to have a structure that absorbs this impact and is excellent in terms of strength. Since athletes etc. feel pain, a certain degree of softness and flexibility is required. Special development aimed at solving these problems Bubble There are not many tatami floors that can absorb impact with polypropylene foam.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0010] Ordinary houses, or nurseries for infants, or nurseries, and furthermore welfare facilities for the elderly and senior citizens, etc., are often in a state of having a flooring floor without tatami rooms, and people often sit cross-legged using chairs, etc. and gather. When sitting, talking, playing, or playing games in such facilities or places, the following problems exist with the tatami mats laid on conventional flooring floors, etc. Usually, when spreading tatami mats widely, the weight per sheet is heavy, and once laid, it is difficult to move them portably. It is difficult to remove the tatami mats laid or the underlay rugs on the flooring floor and change the room's pattern. Also, no matter how many tatami mats using tatami covers are connected, they do not look good and are merely substitutes for tatami. In particular, it was difficult to carry and lay them in various desired places in a small and lightweight set body. Therefore, it is desired to lay a tatami body that is small, lightweight, and has a certain degree of portability.

[0011] From the above viewpoints, when infants, the elderly, disabled persons, etc. move indoors, a tatami floor that enhances safety and comfort, or when used in sports such as judo, etc., has an intermediate layer formed of an elastic foam, and a layer with enhanced cushioning is formed between the upper surface side or the lower surface side of the intermediate layer and the adjacent layer, thereby disclosing a configuration for alleviating the impact force, but it is not sufficient in terms of the effect. Especially when infants, the elderly, disabled persons, etc. fall in a narrow house, etc., they will receive a large impact on their bodies. Therefore, to prevent this, it is required to have a tatami surface with a structure that absorbs this impact and enhances cushioning. Also, in competitions in sports such as judo, if the surface of the tatami is hard, the competitor will feel pain and fractures when taking a fall. Therefore, a certain degree of softness of the tatami floor is necessary, but if it is too soft, a problem will occur where the surface sinks further and the competitor is prone to sprains.

[0012] Furthermore, in the case of a general tatami mat for judo, it is common to manufacture the judo tatami mat by laminating and sewing together each member that constitutes the judo tatami mat. Usually, a normal tatami mat surface is used for the surface of the judo tatami mat. In that case, if the tatami mat surface is covered with a thin sheet-like vinyl chloride material, when the tatami mat surfaces are sewn together, deformation occurs at the corners and edges of the judo tatami mat. Also, the corners and edges are prone to wear due to movement. Therefore, if this is repaired and the sewing is repeated, this tatami mat part becomes even more likely to sink in further. To solve this problem, if a reinforcing material made of a hard material is arranged and reinforced at the corner part, then, if this hard reinforcing material cracks due to an impact, it will become a major factor for serious injury. Also, there are some tatami mat surfaces that are laminated by adhesion, but the conventional ones require a large pressure for pressure bonding and fixing in the adhesion process, so a large-scale pressure bonding machine is required. Furthermore, processing for forming an adhesive layer in advance is necessary, and it is difficult to laminate by adhesion with a simple operation.

[0013] The present invention has been made in consideration of such circumstances, and an object thereof is to provide a judo tatami mat having a tatami mat floor that can adhere a cushioning material laminated above the tatami mat floor in a simple manner, has a strong overall structure, and can sufficiently disperse impacts. An impact-absorbing tatami mat is difficult to deform when a load acts on the intermediate layer and is difficult to sufficiently relieve impacts. Also, moisture easily accumulates on the lower surface side of the impact-absorbing tatami mat, and mold and the like are likely to occur. When using a tatami mat in an environment equipped with floor heating used in a general house, mold is likely to occur due to the floor heating, and there is a problem that the heat from the floor heating does not sufficiently reach the surface of the tatami mat. Therefore, providing a tatami mat excellent in impact absorption, breathability, and heat conductivity also becomes another problem.

[0014] For this reason, it may be necessary to perform a wiping operation before generally using a tatami mat, and the maintenance of a tatami mat with added cushioning is not overly expensive. Also, in the case of a tatami mat surface treated with a resin component, there is also a problem that the flexibility it had at the time of manufacture is gradually lost due to the elution of the plasticizer, and the durability is not sufficient. The present invention has been made to solve the above problems, and an object thereof is to provide a shock-absorbing tatami that can improve maintainability, improve heat insulation durability, and reduce the environmental load during disposal.

Means for Solving the Problems

[0015] In order to improve the cushioning property and safety in a lightweight and thin tatami floor for preventing injuries during activities in a flooring room, a bead foam polypropylene foam board material with a thickness of 5 to 10 mm having a shock-absorbing effect as a first cushioning material is provided under the upper tatami surface layer. Bubble And an expanded polystyrene foam board material with a thickness of 2 to 10 mm that retains heat insulation and elasticity as a second cushioning material. Bubble A shock-absorbing thin and simple tatami is a cushioning tatami floor with a thickness of 20 mm or less, in the range of 15 to 20 mm, in which the bead foam polypropylene foam board material and the expanded polystyrene foam board material are sandwiched in the middle by a stable fixing layer of a polystyrene resin in a sandwich shape with glass fibers for preventing warping of the shape and maintaining high elasticity.

[0016] As a tatami with excellent cushioning properties that can relieve shocks and is lightweight and highly heat-insulating, a surface sheet with load dispersion properties, expanded polypropylene spherical particles with a diameter of 2 to 8φ mm, Bubble are sequentially provided under the lower layer of the tatami surface layer. The expanded polypropylene is pressure-molded into a disk-shaped material with a thickness of 5 to 10 mm, which has a shock-absorbing effect and occupies 20% or more of the lamination ratio of the tatami floor. Bubble It becomes a laminate composed of a cushion I layer of expanded polypropylene, a stable layer of reinforced polystyrene resin sandwiched in a sandwich shape with glass fibers for preventing warping of the shape, a cushion layer II of expanded polystyrene foam with heat insulation and elasticity, and finally a protective sheet of polyolefin fiber cloth that promotes the retention of tatami characteristics. A continuous through-sewing with a width of 30 to 80 mm at intervals of 50 to 100 mm in the vertical direction is performed on the surface of the laminate to form a 7-layer laminate, and a tatami-shaped body is formed by winding a tatami surface as a surface layer on the upper surface of the laminate. Bubble

[0017] ​The tatami floor is composed mainly of, in order above the back material of the tatami surface, a first bead-foamed polypropylene foam board layer, a sandwich-shaped polystyrene resin layer with glass fibers, and a third Bubble polystyrene foam board material layer, and is a 7-layer laminate with through-sewing, in the shape of a tatami with a thickness of 15 - 20 mm, a length of 300 - 1000 mm, and a width of 300 - 1000 mm. It is a tatami-shaped body with a shock-proof foamed polypropylene foam board layer and a sandwich-shaped polystyrene resin layer with glass fibers for shape retention, and is made to be 3 kg or less per sheet of the tatami-shaped body, so that it can be applied to tatami floors in the rooms for infants, the elderly in residential floors, and nursing facilities.

[0018] The tatami surface used in a flooring room and the bead-foamed Bubble polypropylene cushion layer I, a reinforced polystyrene resin stabilizing layer sandwiched with glass fibers in a sandwich shape, and a cushion layer II of heat-insulating and elastic Bubble polystyrene foam, and finally a laminate body composed of a protective sheet of polyolefin fiber cloth that promotes the retention of tatami characteristics, with a thickness of 15 - 30 mm. With a thin stabilizing fixing layer of sandwich-shaped polystyrene resin with glass fibers, it forms a square-shaped tatami body with a length and width of 300 - 1000 mm and a rectangular-shaped tatami body with a width of 150 - 500 mm, which is half the width of the square-shaped tatami body. The weight per sheet is 1 - 3 kg respectively, and it is composed of 4 - 16 sheets in the range of the square-shaped tatami body (including the rectangular-shaped one). It is a square or rectangular flooring tatami-laying object with the square-shaped tatami body or the rectangular-shaped tatami body arranged appropriately. A non-slip material is pasted on the non-woven fabric surface on the back of each tatami body to keep the flooring in a stationary state, and a total of 4 - 16 tatami body sets are laid on the flooring to cover an area of 0.5 - 10 m 2 ², and the total weight of the set is 30 kg or less.

Effects of the Invention

[0019] A daycare center for infants, a nursery, or a welfare facility for the elderly can be a facility or place with a flooring floor without tatami rooms, where people can sit on chairs, gather, talk, play, or play games. The following problems existed with traditional tatami mats laid on the flooring floor. When spreading normal tatami mats widely, the weight per mat is light, and once laid, they can be moved portably. The tatami body can be easily removed from the flooring floor, and the room can be redecorated easily. It looks good and changes the atmosphere of the room. In particular, it is small and lightweight, can be carried, and can be laid in various desired places. The tatami body can be laid in a small area of a certain size.

[0020] It has an intermediate layer of tatami formed of an elastic foam, and a bead method for enhancing cushioning is used between the upper or lower surface side of the intermediate layer and the adjacent layer. Bubble By forming a polypropylene foam plate layer, when infants, the elderly, or physically disabled people move indoors, the safety and comfort are enhanced. When used in sports such as judo, the impact force is reduced. In particular, when infants, the elderly, or physically disabled people fall in a narrow house, they are less likely to receive a large impact on their bodies. Also, it has a tatami surface with a structure that absorbs the impact when falling and enhances the cushioning property. In particular, in sports competitions such as judo, if the surface of the tatami is hard, the athletes are less likely to experience pain and fractures when taking a fall.

[0021] According to the present invention, the bead method is laminated from above the tatami floor. BubbleBy using a cushioning material of polypropylene foam in an appropriate range on the upper surface and being able to sew it together with a stabilizing material in a simple way, a five-layer material can be made into a stable laminate without using a large-scale pressing machine, etc. By performing through-sewing with a sewing thread between the front and back of the core material of the tatami floor, a tatami can be manufactured with good workability in a short time. Also, the tatami floor can be finished into a structure that is lightweight, heat-insulating, and strong as a whole, while being able to sufficiently disperse impacts. It can generate air circulation between the lower surface and the upper surface of the tatami, effectively discharging the moisture on the lower surface side. Moreover, when an impact is applied, the peripheral part deforms due to rigidity, exerting an effect of absorbing a large impact.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0023] To clarify the implementation of this invention, the following description will be given with reference to FIGS. 1 to 5. As shown in FIGS. 1 and 2, the mat of the shock-absorbing fold is composed mainly of a first bead-foamed polypropylene foam board layer, a second insulation board layer, or a polystyrene resin layer with sandwich-shaped glass fibers, and a third Bubble polystyrene foam board material layer, and is made into a 5-layer laminate with through-sewing. In particular, the example illustrates that the first bead-foamed polypropylene foam board layer shows a high effect on shock absorption.

Example

[0024] As shown in FIG. 1B, in order to enhance the cushioning property of the tatami floor, a 7-mm-thick bead-foamed Bubble polypropylene foam board material with shock-absorbing effect as the first cushioning material and a 5-mm-thick Bubble expanded polystyrene foam board material that retains heat insulation and elasticity as the second cushioning material are used with a 6-mm-thick stabilizing layer of sandwich-shaped polystyrene resin with glass fibers in the middle. It was a 21-mm-thick thin shock-absorbing tatami.

[0025] As a tatami with excellent cushioning property to relieve shock, lightweight and high heat insulation, on the lower layer of the tatami surface layer, there are sequentially a 1-mm-thick non-woven fabric surface sheet with load dispersion property, a cushion layer I of bead-foamed Bubble polypropylene with shock buffering effect, a stabilizing layer of reinforced polystyrene resin sandwiched with glass fibers, a cushion layer II of expanded Bubble polystyrene foam with shape retention, heat insulation and elasticity, and finally a protective sheet of polyolefin fiber cloth that promotes tatami property retention. As shown in FIG. 2B, it is made into a 5-layer laminate sewn through with 2-mm-φ sewing threads at equal intervals of 70 mm in both vertical and horizontal directions, and a tatami-shaped body shown in FIG. 2A with a 3-mm-thick tatami surface wound around the upper surface of the laminate.

[0026] The tatami floor is composed of, in order above the back material of the tatami surface, a first foamed polypropylene foam board layer, a second sandwich-shaped polystyrene resin layer with glass fibers, and a third Bubble It is mainly composed of a polystyrene foam board material layer, and is a 5-layer laminate with through-sewing for each layer, in the shape of a tatami with a thickness of 20 mm, a length of 900 mm, and a width of 900 mm, and the weight per tatami-shaped body is 1.9 kg. It is a material with high shock absorption, made by the bead method Bubble As shown in Figure 3, the foamed polypropylene foam board material uses spherical particles with a diameter of 3 to 6 mm φ Bubble made of polypropylene, and is a product compression-molded to a thickness of 7 mm.

[0027] Bead method Bubble To clarify the effects of the foamed polypropylene foam board material and the sandwich-shaped polystyrene resin layer with glass fibers, the basic shock absorption material (bead method of the first cushion material) excluding the tatami surface in the thin-type shock-absorbing simple tatami of the present invention Bubble The foamed polypropylene foam board material and the second cushion material Bubble (a sandwich-shaped polystyrene resin layer of a polystyrene foam board material and glass fibers) and, for comparison, an insulation board layer commonly used are compared at the same layer thickness to measure the shock absorption amount, that is, the impact force. The method is as follows: A 10 kg 40 mm φ hammer is dropped from a height of 10 cm, and the impact force is measured from the deceleration of the rebound. The schematic of the measuring device is as shown in Figure 5-A, and the results are as shown in Table 1. As shown in Table 1, it was clarified that the shock absorption amount of the ordinary thin-type tatami was improved by 23% or more. Or regarding the deflection of the tatami, an improvement of about 13% was observed.

Table 1

[0028] The deflection amount was measured by the weighting device shown in Fig. 5-B. Bead method with impact buffering effect Bubble As a polypropylene foam board material, in the tatami floor body of Fig. 3, spherical particles with a diameter of 2 to 8 φmm were used. Bubble Polypropylene was pressure-molded into a disk-shaped material with a thickness of 5 to 10 mm, and a disk-shaped material with a width of 900 mm and a length of 900 mm was pressure-molded. Also, the deflection amount was improved by a sandwich-shaped stable layer of polystyrene resin with glass fiber. Compared with the commonly used thin tatami, the effect of preventing warping by pressing and the measurement of the rebounding effect from the fall of steel balls and soft balls were carried out. By using special both materials, the warping prevention is also very small, and the elastic modulus and impact absorption rate (impact force) are also highly improved, and the performance is improved. The bead method of the first cushioning material of the present invention Bubble Polypropylene foam board material and the development of the second cushioning material Bubble It was evaluated that the impact absorption effect and the stabilization effect were very improved by a sandwich-shaped polystyrene resin layer of a polystyrene foam board material and glass fiber.

[0029] The deflection amount has a deflection reduction effect of 15% or more due to the effect of the sandwich-shaped polystyrene resin layer with glass fiber. Also, in terms of the impact absorption ability, the bead method Bubble It was clarified that the synergistic effect of the polypropylene foam board material and the sandwich-shaped polystyrene resin layer with glass fiber has an improvement of 32% or more compared to those without it. Regarding the lamination ratio of the tatami floor, the bead method Bubble The impact-absorbing thin and simple tatami in which the polypropylene foam board material and the sandwich-shaped polystyrene resin layer with glass fiber account for 50% or more was laid on the children's room floor of the residential floor with 9 sheets of impact-absorbing thin and simple tatami set as shown in Fig. 4. For this room, it is safe and effective for various behaviors of children and is widely applicable.

Example

[0030] Similar to Example 1, in order to enhance the cushioning property and safety of the lightweight and thin tatami floor, below the lower layer of the tatami surface, as the first cushioning material, a 8-mm thick bead foam polypropylene foam board with an impact absorption effect Bubble and, as the second cushioning material, a 7-mm thick expanded polystyrene foam board that retains heat insulation and elasticity Bubble are used with a 7-mm thick stable fixing layer of polystyrene resin in a sandwich structure with glass fibers as a shape retention material for preventing warping and providing high elasticity in the middle, resulting in a 23-mm thick impact-absorbing and cushioning tatami floor, which is a lightweight and thin simple tatami.

[0031] As a tatami with excellent cushioning property for alleviating impacts and being lightweight and highly heat-insulating, below the lower layer of the tatami surface on the surface layer, there are successively a surface sheet with load dispersion property, expanded Bubble polypropylene made of spherical particles with a diameter in the range of 5 to 8 φmm, which is pressure-molded into a disk-shaped material with a thickness of 5 to 10 mm, having an impact absorption effect and occupying 20% or more of the lamination ratio of the tatami floor Bubble a cushion I layer of polypropylene, a stable layer of reinforced polystyrene resin in a sandwich structure with glass fibers for preventing warping, and expanded Bubble a cushion layer II of polystyrene foam, and finally a laminate composed of a protective sheet of polyolefin-based fiber cloth for promoting the retention of tatami characteristics. A continuous through-sewing with 2-mm φ hemp sewing threads with a width of 60 mm at intervals of 60 mm in the longitudinal direction is performed on the entire surface of the laminate to form an integrally laminated body without an adhesive. A tatami-shaped body is formed by wrapping the tatami surface as the surface layer on the upper surface of the laminate.

[0032] Above the back material of the tatami surface, the tatami floor successively has a first bead foam polypropylene foam board layer, a polystyrene resin layer with sandwich-shaped glass fibers, and a third expanded BubbleIt mainly consists of a polystyrene foam board layer and is a 7-layer laminate with through-sewn layers. It is a tatami-shaped body with a thickness of 23 mm, a length of 800 mm, and a width of 800 mm. It has a shock-absorbing foamed polypropylene foam board layer and a shape-retaining sandwich-shaped polystyrene resin layer with glass fibers. The weight per sheet of the tatami-shaped body is 1.8 kg and it can be applied to the tatami floors for the elderly and caregivers in residential floors. Also, the same performance as in the examples was obtained.

Example

[0033] The shock-absorbing thin and simple tatami produced by the same product and manufacturing method as in Example 1 is used for the tatami surface in a flooring room and the beads method Bubble The cushion layer I of polypropylene, the stable layer of reinforced polystyrene resin sandwiched with glass fibers in a sandwich shape, and the foam with heat insulation and elasticity Bubble The cushion layer II of polystyrene foam, and finally a laminate body consisting of a protective sheet of polyolefin fiber cloth that promotes the retention of tatami characteristics. The thickness is 20 mm, and the dimensional shape is a square tatami body with a length and width of 800 mm and a rectangular tatami body with a width of 400 mm, which is half the width of the square tatami body, and a length of 800 mm. The weight per sheet is less than 1 kg, and the same performance as in the examples was obtained. It is composed of a total of 12 sheets including the square tatami body and the rectangular tatami body. The square tatami body and the rectangular tatami body are appropriately arranged to form a square flooring tatami covering object. A non-slip with double-sided adhesiveness is pasted on the non-woven fabric surface on the back of each tatami body to keep the flooring in a stationary state. A total of 12 tatami body sets are laid on the flooring to cover an area of about 6 m 2 and the total weight of the set is made to be 19 kg or less. This was used in a nursing facility.

Explanation of Signs

[0034] 1 Shock-absorbing tatami 2 Tatami surface 3 Tatami floor 4 Cushion layer I 5 Cushion layer II 6 Protective sheet 7 Load dispersion sheet 8 Stable fixing layer 9 Surface layer 10 Laminate, laminate body 11 Insulation board 12 Bead foamed polypropylene foam 13 Impact absorption layer 14 Fa Bubble Polystyrene 15 Expanded polypropylene particles 16 Glass fiber sandwich polystyrene resin 17 Continuous through sewing 18 Glass fiber sandwich polystyrene resin 19 Stacked body with rolled tatami surface 20 Floor 21 Wall 22 Measuring stand 23 Velocity measuring device 24 Measuring table 25 Drop hammer frame 26 Tatami test specimen 27 Pressing head 28 Pressing bar 29 Fulcrum bar 30 Measuring point (dial gauge)

Claims

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

2. This tatami, which provides excellent cushioning and shock absorption, is lightweight and highly insulating. The tatami mat described in claim 1 has a surface layer below the tatami surface, which is a top layer made of a load-dispersing surface sheet; a disk-shaped body made of expanded polypropylene spherical particles 2 to 8 mm in diameter, pressure-molded into a 5 to 10 mm thick disk; a cushion layer I made of bead-method expanded polypropylene, which has shock-absorbing properties and accounts for 20% or more of the layer ratio of the tatami floor; a stabilizing layer of reinforced polystyrene resin sandwiched between glass fibers to prevent warping; a cushion layer II made of expanded polystyrene foam, which has insulating properties and elasticity; and a final laminate made of a protective sheet of polyolefin fiber cloth to help maintain the tatami's characteristics. The surface of the laminate is sewn with continuous thread at 50 to 100 mm intervals in the vertical direction and 30 to 80 mm wide, to form a seven-layer laminate, and the tatami surface is then wrapped around the top surface of the laminate as the surface layer.

3. The tatami floor is mainly composed of, above the backing material of the tatami surface, a first bead-method expanded polypropylene foam board layer, a sandwich-shaped glass fiber-attached polystyrene resin layer, and a third expanded polystyrene foam board layer, with each layer being sewn together to form a seven-layer laminate, with the dimensions of a tatami-shaped body 15 to 20 mm thick, 300 to 1000 mm long, and 300 to 1000 mm wide, and the weight of each tatami-shaped body made mainly of the impact-resistant expanded polypropylene foam board layer and the shape-retaining sandwich-shaped glass fiber-attached polystyrene resin layer is 3 kg or less, making it suitable for use in residential floors for infants and the elderly, and in nursing homes.

4. A laminated body composed of a tatami mat used in a flooring room, a cushion layer I of bead-foamed polypropylene, a stabilizing layer of reinforced polystyrene resin sandwiched with glass fibers in a sandwich shape, a cushion layer II of foamed polystyrene foam having heat insulation and elasticity, and finally a protective sheet of polyolefin fiber cloth for promoting the retention of tatami characteristics, with a thickness of 15 to 30 mm. The thin stabilizing and fixing layer of polystyrene resin sandwiched with glass fibers forms a square tatami body with a vertical and horizontal width of 300 to 1000 mm and a rectangular tatami body with a horizontal width of half the width of the square tatami body, i.e., 150 to 500 mm, with a weight of 1 to 3 kg per sheet. It is composed of 4 to 16 square or rectangular tatami bodies respectively, and is made into a square or rectangular flooring tatami laying object by appropriately arranging the square or rectangular tatami bodies. A non-slip material is attached to the non-woven fabric surface on the back of each tatami body to keep the flooring in a stationary state. A total of 4 to 16 tatami body sets are laid on the flooring to cover an area of 0.5 to 10 m2, and the total weight of the set is 30 kg or less. The impact-absorbing thin and simple tatami according to claim 1 or claim 2, characterized in that it is as described above.

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