JP2017115562A - Tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tatami mat excellent in shock absorption, air permeability and thermal conductivity.SOLUTION: A tatami mat 1 includes a tatami core 20, and a tatami facing 10 covering a surface of the tatami core 20. The tatami core 20 includes an elastic cushion layer 21, and a plurality of through holes 30 penetrating top and reverse surfaces are formed. A protective pipe 32 elastically deformable is preferably attached to an inner peripheral surface of the through hole 30. A hollow drill is used as a drill for boring the through hole 30, and accordingly, action for continuously boring the holes can be stably performed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tatami mat having improved air permeability, and more particularly to a tatami mat suitable for judo.

  Tatami is a flooring material that has been used in Japan since ancient times, and has been widely used in Japanese-style buildings including homes, martial arts halls suitable for judo and aikido, and gymnasiums.

  The performance required for tatami mats includes moisture absorption / desorption, sound absorption, thermal conductivity, shock absorption, rigidity, flexibility, durability, etc. However, it is important to have both sufficient rigidity that the foot does not sink and shock absorption that can sufficiently absorb the impact when hit by the tatami by throwing technique.

  From this viewpoint, in Patent Document 1, in a judo tatami having an intermediate layer formed of an elastic foam, an impact force is generated by forming a gap between the upper layer side or the lower surface side of the intermediate layer. A mitigating configuration is disclosed.

JP 2013-124489 A

  The judo tatami disclosed in the above-mentioned Patent Document 1 has a problem that the recesses are not easily deformed when a load is applied to the intermediate layer and the shock is not sufficiently mitigated because the voids are formed by bottomed recesses. there were. Moreover, moisture tends to accumulate on the lower surface side of the judo tatami mat, and mold and the like are easily generated. In addition, when using tatami mats in an environment with floor heating used in ordinary houses, mold is easily generated by the heat generated by the floor heating, and the heat is blocked by the tatami mat, resulting in warm air from the floor heating. There was a problem that did not reach the surface of the tatami. Then, an object of this invention is to provide the tatami mat excellent in shock absorption property, air permeability, and heat conductivity.

  In the present invention, the above object is achieved by a tatami mat composed of a tatami floor composed of a plurality of layers and a tatami mat covering the tatami floor and having a hole penetrating the tatami floor.

  A hole that penetrates the tatami floor creates an air flow between the lower surface and the upper surface of the tatami mat, making it possible to effectively release the moisture on the lower surface side, and a hole that is inferior in rigidity when subjected to an impact. Deformation of the peripheral part of the wing exerts an effect of absorbing a large impact.

  In order to remove the moisture originally existing between the tatami and the floor, it is desirable to dry the tatami on a regular basis. However, these customs are being lost today. According to the present invention, the through hole is deformed by an impact caused by walking or the like, and the effect of pushing out air staying inside the through hole to the back surface like a pump is obtained. As a result, the air expelled to the back surface is pushed out of the back of the tatami mat while engulfing the remaining moisture, so that the moisture can be effectively removed. Furthermore, when tatami mats are placed on floors equipped with floor heating equipment, which has been increasingly used in recent years, the warm air is effectively led to the tatami surface through the through holes, so that the floor heating effect is extremely effective. It is possible to squeeze.

It is sectional drawing which notches and shows a part of tatami concerning one embodiment of the present invention. It is a perspective view of the tatami shown in FIG. It is sectional drawing of the tatami concerning other embodiment of the present invention. It is sectional drawing of the tatami mat which concerns on other embodiment of this invention. It is sectional drawing shown in the state which decomposed | disassembled the tatami concerning other embodiment of this invention. It is a three-view figure which shows the drilling machine with which the hollow drill was mounted | worn. It is detail drawing of a hollow drill. It is a figure which shows the drilling machine equipped with the protection pipe insertion mechanism and the hollow drill. It is a figure which shows the structure of the tatami for judo suitable for a gymnasium use. It is a figure which shows the shock absorption experiment result of the tatami for judo suitable for a gymnasium use. It is a judo tatami suitable for gymnasium use, Comprising: It is a figure which shows the impact-absorption comparative experiment result when not having a through-hole. It is a figure which shows the structure of the tatami for judo suitable for general use. It is a figure which shows the impact absorption experiment result of the tatami for judo suitable for general use. It is a judo tatami suitable for a general use, Comprising: It is a figure which shows the impact-absorption comparison experiment result when not having a through-hole. It is a figure which shows the structure of the tatami for judo suitable for a competition use. It is a figure which shows the impact absorption experiment result of the tatami for judo suitable for a competition use. It is a judo tatami suitable for a competition use, Comprising: It is a figure which shows the impact-absorption comparison experiment result when not having a through-hole. It is a figure which shows the structure of the tatami for judo suitable for a junior use. It is a figure which shows the impact absorption experiment result of the tatami for judo suitable for a junior use. It is a judo tatami suitable for a junior use, Comprising: It is a figure which shows the impact-absorption comparison experiment result when not having a through-hole. It is a figure which shows the structure of the tatami 1 for houses. It is a figure which shows the impact-absorption experiment result of the tatami 1 for houses. It is a tatami 1 for house, Comprising: It is a figure which shows the impact-absorption comparison experiment result when not having a through-hole. It is a figure which shows the structure of the tatami 2 for houses. It is a figure which shows the impact-absorption experiment result of the tatami 2 for houses. It is a tatami 2 for house, Comprising: It is a figure which shows the impact-absorption comparison experiment result when not having a through-hole. It is a figure which shows the structure of the tatami 3 for houses. It is a figure which shows the impact absorption experiment result of the tatami 3 for houses. It is a tatami 3 for houses, and is a figure which shows the impact-absorption comparison experiment result when not having a through-hole.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a tatami mat according to an embodiment showing the minimum concept of the present invention, and shows that a tatami is constituted by a tatami floor 20 having a through hole 30 penetrating the tatami floor 20 and a tatami surface 10. . FIG. 2 is a perspective view showing a state in which a tatami table is deleted and a part thereof is cut out in order to easily show the internal structure.

  The tatami mat 1 includes a tatami mat table 10 and a tatami mat floor 20, and the surface of the tatami mat floor 20 is covered with the tatami mat table 10.

  The tatami surface 10 is made of rush, Japanese paper, resin, leather, and the like, and is in close contact with the surface of the tatami floor 20 by adhesion or sewing. In addition, in order to facilitate replacement of the tatami surface 10, the tatami surface 10 may be fixed to the tatami floor 20 by being pinned, or fixed to the tatami floor 20 in addition to being fixed by a hook-and-loop fastener. Is possible. If the tatami floor and the tatami surface are integrated and can be easily separated, it is sufficient.

  The tatami floor 20 is composed of a combination of an elastic cushion layer 21 and an insulation board 22 that is harder than the cushion layer. In addition to this, it is desirable to provide a polyethylene sheet on the back to protect the tatami floor. For the purpose of enhancing the functionality of the tatami floor, an anti-slip sheet may be provided instead of or in addition to the polyethylene sheet.

The cushion layer 21 is desirably highly elastic, and more preferably a material having a certain degree of hardness. This is because, when used as a tatami mat, if there is no hardness, the amount of deformation when a load is applied increases, causing the foot to sink. As a material having high elasticity and a certain degree of hardness, foamed resins such as polystyrene foam, polypropylene foam, polyurethane foam, and polyethylene foam, foamed rubber, and three-dimensional network can be used.

  The insulation board only needs to have sufficient hardness to maintain the shape of the tatami floor 20, and use traditional materials such as rice straw in addition to wood such as cypress, wood chips and building materials. Is also possible.

  The tatami floor 20 can adopt various forms depending on the application. In order to specialize in improving the shock absorption, it is possible to make the insulation board thin by using a large cushion layer, or to adopt a configuration in which no insulation board is provided. In addition, by combining the cushion layer 21 with various layers having different elasticity and hardness such as a paper material and a nonwoven fabric, it is possible to give suitability according to the application.

  The size of the tatami floor 20 is 95.5cm wide, 191cm long, 1.5cm to 6cm thick when used in Honma (also known as Kansai and Kyoto) used in the south of Kinki. In the case of using for the eightty-five spaces used (also called Kanto and Edo), the width may be about 88.0 cm, the length may be 176 cm, and the thickness may be about 1.5 cm to 6 cm. Of course, it is possible to adopt other special sizes.

  The tatami floor 20 is provided with a plurality of through holes 30. As the form of the through hole 30, a quadrangular column, a hexagonal column, an octagonal column, a cylinder, and the like are conceivable, but a columnar shape is most desirable because dust or the like easily adheres to a corner portion. In that case, it is required that the inside diameter is small enough to prevent the little toes of the child from getting caught in the child and is large enough to exhibit the air permeability and the degree of deformation described later. . When the present inventor conducted intensive experiments, it was found that a diameter of about 8 mm is most desirable.

  The through hole 30 penetrates from the front surface to the back surface of the tatami floor 20. In addition, although it is normal that the hole is not provided in the tatami surface 10, it is good also as a structure penetrated to the tatami surface 10 in conjunction with the through-hole 30 in order to improve ventilation property further.

  Due to the presence of the through hole 30, sufficient air permeability can be obtained from the back surface to the front surface of the tatami 1, so that moisture below the tatami 1 is naturally released above the tatami 1, resulting in the back surface of the tatami floor and the like. It is possible to suppress the possibility of mold and the like occurring. In addition, when floor heating is adopted, since warm air emitted from the floor blocked by the tatami floor 20 is guided to the tatami surface 10 through the through hole, efficient heating is possible.

  Furthermore, when an impact is applied to the tatami floor 20, the through hole 30 is deformed throughout the thickness direction of the tatami floor 20, and the impact is mitigated. In particular, the cushion layer 21 is not only compressed and contracted in the thickness direction of the tatami floor 20, but also easily deformed in the horizontal direction due to the presence of the through holes, and therefore, it is possible to exhibit extremely large shock absorption. In addition, since the energy of the impact sound that was supposed to be generated due to the impact is also reduced, it is possible to obtain the effect of reducing the trouble to the surroundings even when performing judo training that tends to be loud noise. it can.

Moreover, the air staying inside the through hole 30 is compressed by the deformation of the through hole when an impact is applied, and is pushed out to the back surface of the tatami floor. Extruded air reaches the back of the tatami floor, and finally it is pushed out to the outside of the tatami together with the moisture staying on the back, effectively removing the moisture on the back of the tatami floor. it can.

  The through-holes 30 may be drilled in various patterns as necessary, but typically are drilled at locations corresponding to the apexes when quadrangles are spread without gaps as shown in FIG. In addition, various patterns such as each vertex when regular hexagons are spread without gaps and each vertex of the Warren truss can be adopted. The pattern is determined in consideration of the hardness (strength) and elasticity of the tatami floor and ventilation.

  As mentioned above, although typical embodiment of this invention was described, the specific aspect of this invention is not limited to this. For example, as shown in FIG. 3, a part of each through hole 30 facing the back surface is partially scraped, and a groove portion 31 is formed in a lattice shape on the back surface of the tatami floor 20 so that the floor surface and the through hole on which the tatami 1 is arranged. By securing a space between 30, the tatami mat 1 with further improved air permeability can be obtained.

  In order to ensure air permeability in addition to the groove portion 31, even if a lattice-like or slat-like mold is placed below the tatami 1 using stronger wood, plate material, aluminum material, vinyl chloride, etc. Good. Of course, these may be arranged even when the groove 31 is not provided.

  As shown in FIG. 4, you may comprise so that the through-hole 30 of the tatami floor 20 may be equipped with the protection pipe 32 which has elasticity and can deform | transform. The protective pipe 32 is made of an elastic material such as resin or rubber, and has a cylindrical body such as a cylinder, a square column, or a hexagonal column depending on the shape of the hole, and the outer peripheral surface is the inner peripheral surface of the through hole 30. It arrange | positions so that it may contact | adhere.

  Providing the side surface of the protective pipe with protrusions or screw-like irregularities can reduce the possibility of the protective pipe jumping out of the through hole due to an impact applied to the tatami.

  By disposing the protective pipe 32, after the tatami floor 20 receives an impact and the through hole 30 is deformed, the shape of the through hole 30 is reliably restored to the original state by the elastic restoring force of the protective pipe 32, and remains unchanged. It is possible to exert shock absorption and air permeability. This is remarkable when the tatami mat 1 is operated for a long time.

  Further, by providing an air valve (backflow prevention valve) at the tip of the protective pipe, it becomes possible to limit the air flow in one direction. When it is inappropriate to flow the air to the tatami mat side suddenly, such as when using a tatami mat material with poor ventilation, such as in the indoor environment, the air is only flowed to the back of the tatami mat surface, so that more stable performance is continuously demonstrated. It will be possible to continue.

  Further, when the cushion layer 21 and the insulation board 22 have air permeability and moisture absorption, a plurality of communication holes are formed in the wall surface of the protective pipe 32 so that the moisture contained in the cushion layer 21 and the like is passed through the protective pipe 32. Thus, it can be discharged from the through hole 30 to the outside.

  By making the inside of the protective pipe hollow and providing a spring in the hollow portion, it is possible to further enhance the performance of absorbing impact and to enhance the pump function of pushing air to the back surface through the through hole. The spring can be made of a metal such as iron or aluminum, or vinyl chloride or plastic if lightening is desired.

  As a method for inserting and fixing the protective pipe 32 into the through-hole 30, instead of individually attaching the protective pipe to the through-hole 30, a base on which a plurality of protective pipes 32 are integrally attached as shown in FIG. 40 may be used. In this case, since a plurality of protective pipes 32 can be simultaneously inserted into and fixed to each through hole 30, the manufacturing speed can be increased and the cost can be reduced. Such a protection pipe 32-base 40 can be easily manufactured by integrally molding a plurality of cylindrical ridges on a base 40 made of resin.

  The same effect can also be achieved by applying a protective film made of an elastic paint to a part or all of the inner peripheral surface of the through hole 30 instead of arranging the protective pipe 32. The elastic paint is preferably an acrylic rubber type or acrylic silicon type. In general, it is easier to apply a protective film than mass insertion in the case where the protective pipe 32 is inserted into the through-hole 30 and fixed, so that the cost can be further reduced.

  Next, a method for manufacturing the tatami 1 will be described. Here, it is assumed that the tatami mat 1 in which the tatami mat 10 is bonded to the tatami floor 20 configured by stacking the insulation board 22, the cushion layer, and the insulation board 23 is manufactured.

  First, in a state where the insulation board 22, the cushion layer, and the insulation board 23 are stacked in order from the bottom, they are cut to the size of the tatami mat to be shipped. In addition, a tatami-sized insulation board and a cushion layer may be used from the beginning, and in this case, the cutting step can be omitted.

  Next, the insulation board 22, the cushion layer, and the inhibition board 23 are integrated by sewing with a thread to form the tatami floor 20. As a sewing method, a known machine used for tatami mat production may be used, or traditional hand-sewn may be used. Any known numerical value can be adopted for the density of the sewing method. Instead of sewing with a thread, a method of integrating the insulation board 23, the cushion layer, and the insulation board 22 with an adhesive may be used.

  Next, the tatami floor 20 is installed in the punching machine 50 shown in FIG. The drilling machine 50 is provided with a plurality of drills. Various known forms can be adopted as the shape of the drill. However, when the present inventors have conducted extensive experiments, it is most preferable to use a hollow cylindrical drill (hereinafter referred to as the hollow drill 51). I found it desirable. Normally used drills and routers require various adjustments in order to make a clean hole in a tatami floor with both soft and hard layers. It is because a hole can be made well.

  The drilling machine 50 includes a rotating means for rotating the hollow drill 51, a rotating power transmission means for transmitting power to the rotating means, and a power machine. As the power machine, a motor that rotates with electric power is preferable. If the motor has sufficient output, rotational power can be supplied from one motor to all the rotating means via the rotating power transmission means. When the present inventor repeated diligent experiments, one motor was able to supply sufficient rotational power to up to 12 hollow drills. The speed can be easily adjusted by providing an inverter. When the present inventor conducted intensive experiments, it was found that the most beautiful hole was formed at around 1100 revolutions / minute.

  Further, the punching machine 50 is moved in the direction of inserting the hollow drill 51 into the tatami floor, pierced and penetrated to the back of the floor, and further withdrawing / inserting motion means utilizing crank motion so as to be able to be lifted from the tatami floor. Is provided. Using crank motion, it can be inserted and removed once in one rotation. Moreover, the hollow drill receiver is arrange | positioned in the place where the hollow drill 51 penetrated the tatami floor. The hollow drill receiver is made of plastic or wooden plate, and the hollow drill is not damaged even when it comes into contact with the hollow drill rotating at high speed. By providing this hollow drill receiver, it becomes possible to make a more beautiful hole.

  A detailed view of a hollow drill suitable for drilling an 8 mm diameter hole is shown in FIG. By making the drill hollow, the end material is stored inside the drill. For this reason, the deformation | transformation of the tatami floor 20 by the scraped off end material being pressed with a drill is suppressed, and a hole can be drilled neatly. Furthermore, it was found that not only can holes be made at high speed, but also the durability and high speed are excellent. More specifically, a hollow columnar shape with a cutting edge treated at the end, a portion with a sharp end, etc. are preferred, but in any shape generally known as a hollow drill, It is possible to enjoy the benefits.

  The hollow drill 51 is provided in the drilling machine 50 so as to match the arrangement pattern of the through holes 30 drilled into the tatami floor 20. In the drilling machine 50 shown in FIG. 6, the distance between the centers of the hollow drills is 40 mm. By shifting the tatami floor 20 in the vertical direction every time a hole is drilled, it is possible to manufacture the tatami floor 20 having through holes 30 at each apex when a rectangle is laid on the tatami floor 20. The vertical movement of the tatami floor 20 is automatically performed by a floor moving device provided in the drilling machine 50. It should be noted that the location of each apex must be determined so as not to cut the thread that has integrated the tatami floor. The distance between the centers of the hollow drills is not limited to 40 mm, and various distances such as 20 mm and 80 mm can be employed. In addition, by making the floor moving device of the punching machine 50 movable to the left and right, even with fewer hollow drills 51, it is possible to drill holes throughout the tatami by moving the tatami floor laterally. It becomes.

In order to equalize the shock absorbing performance from both the vertical and horizontal directions, it is most preferable that the distance shifted in the vertical direction is the same as the distance between the centers of the hollow drills, and the through-holes 30 are formed at each vertex when the square is tightened. . That is, the holes may be formed while shifting the distance between the centers of the hollow drills in the vertical direction. In addition to this, it is possible to make various patterns of holes. For example, when manufacturing a tatami floor 20 having through holes 30 at each apex when equilateral triangles are laid on the tatami floor 20, the tatami floor 20 is shifted in the horizontal direction every time a row of through holes 30 is drilled. Or by shifting the drill 51 in the lateral direction as a whole.

  It is also possible to provide two or more hollow drills 51 in order to drill holes in a more complicated pattern. If drills are further added and the hollow drill 51 is arranged for the entire area of the tatami floor 20, holes can be drilled on the entire surface of the tatami floor 20 with a single action, so that the manufacturing speed can be further increased. .

  When inserting the protective pipe, a machine in which the protective pipe insertion mechanism 52 is added to the drilling machine 50 is used as shown in FIG. The protective pipe insertion mechanism is installed at the same coordinate in the left-right direction as that of the hollow drill 51, and is provided at a coordinate located at an integral multiple of the movement distance of one time in the vertical direction of the floor moving device. For this reason, it is possible to insert the protective pipe in conjunction with the operation of the hollow drill 51 drilling a hole.

  The protective pipe insertion device includes tube holding devices 1 and 2 and a tube cutter, and a tube made of vinyl chloride resin or the like. The tube holding device 1 sandwiches the tube and inserts it into the tatami floor using a tube pushing cylinder so that a certain ratio protrudes from the tatami floor. After the tube is held by the tube holding device 2, the tube holding device 1 is released, and the tube pushing cylinder returns to the origin. Thereafter, the tube is cut with a tube cutter to form a protective pipe. In addition, as another version of the protective pipe insertion mechanism 52, a melted rubber or the like is poured into the hole, and then the protective pipe is formed by natural solidification, or the protective pipe is integrally formed as described above. It is also possible to adopt a configuration in which the entire base is inserted.

  Next, the tatami mat 1 can be obtained by integrating the tatami mat and the tatami floor. In addition, when manufacturing the tatami 1 in which the hole has penetrated also in the tatami mat, it can be easily manufactured by integrating the tatami mat and the tatami floor before drilling the hole in the punching machine 50.

  In the following, tatami mats suitable for four types of judo with different shock absorbing power, rigidity, and flexibility will be described, and tatami mats suitable for three general uses. In all the examples, the tatami floor is provided with through holes having a diameter of 8 mm at positions corresponding to the apexes when a 40 mm square is spread. In either case, the protective pipe is not provided, but it is desirable to insert the protective pipe when operating for a long period of time.

As a cushion layer used in the examples shown below, polystyrene foam, polypropylene foam, non-woven fabric using special chemical fibers, chip urethane, etc. are used. Adopted the seat.

The polystyrene foam is a mixture of polystyrene as a resin, normal butane and isobutane as a foaming agent, hexabromocyclododecane as a flame retardant, and styrene as the other component. For example, JSP Co., Ltd. A type extrusion method polystyrene foam heat insulating board 1 type b (Mirafoam M1F · MTS) is suitable.

The polypropylene foam is a so-called foamed polypropylene and is a copolymer of ethylene and propylene. For example, JSP Corporation's P-Block (registered trademark) is suitable.

The special chemical fiber is a nonwoven fabric in which polyethylene terephthalate and polypropylene are mixed. For example, Fujiron 10001 from Fujiko Co., Ltd. is suitable. As another type of special chemical fiber, artificial turf in which turf yarn is planted on a base fabric can be used. Compared with a nonwoven fabric made of polyethylene terephthalate or polypropylene, the impact absorbability can be further enhanced. As the artificial turf, Sekisui Resin Co., Ltd.'s Dream Turf series is suitable, but an artificial turf made of looped turf may be used.

The layer of chip urethane is a mixture comprising 80-99% polyurethane chip and 20-1% binder. For example, Green Pearl 12000 from Toyo Quality One Co., Ltd. is suitable.

The insulation board uses coniferous wood chips such as pine and cedar as the main raw material, starch or PVA adhesive as a binder, a small amount of sulfuric acid band-based fixing agent as an additive, and a wax-based sizing material Consists of For example, Daiken tatami board manufactured by Daiken Industry Co., Ltd. is suitable.

  Example 1 is a judo tatami mat for a gymnasium suitable for a facility such as a gymnasium having a lower portion made of a hard freering material. As shown in FIG. 9, a polyethylene sheet, a special chemical fiber layer 10 mm in thickness, a polystyrene foam layer 20 mm, an insulation board 15 mm, a polypropylene 15 mm, and an antibacterial tatami mat as a tatami mat on the top layer, as shown in FIG. did.

  And the through-hole from an antibacterial tatami mat to a polyethylene sheet was arrange | positioned as inner diameter 8mm and the distance between centers with the adjacent through-hole 30 being 40 mm.

  By adopting this configuration, the upper layer and middle layer absorb the competitor's impact, and the lower layer receives the impact of the entire tatami, making it difficult for the impact to be transmitted to the hard flooring layer of the gymnasium. The best judo tatami mat was realized.

  In order to confirm the impact absorption effect of the tatami mat constructed as described above, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 10, the peak acceleration was 686.97. When a comparison experiment was performed using a tatami mat having the same configuration without the through hole 30, the peak acceleration was 831.57 as shown in FIG. 11, and it was confirmed that the shock absorption increased due to the presence of the through hole 30. It was.

  Example 2 is a tatami that can be used by athletes of various levels. As shown in FIG. 12, a polyethylene sheet, a chip urethane layer of 10 mm thickness, a polystyrene foam layer of 20 mm, an insulation board of 15 mm, a polypropylene of 15 mm, and an antibacterial tatami mat as a tatami mat are arranged on the uppermost layer as shown in FIG. .

  By adopting this configuration, we have realized a judo tatami with a good balance of shock absorption, competitiveness (how to sink the foot), and durability. In order to confirm the impact absorption effect of the tatami mat constructed as described above, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 13, the peak acceleration was 775.84. When a comparative experiment was conducted using a tatami having the same configuration without the through hole 30, the peak acceleration was 809.82 as shown in FIG. 14 and it was confirmed that the shock absorption increased due to the presence of the through hole 30. It was.

  Example 3 is a judo tatami suitable for competition. As shown in FIG. 15, the polyethylene sheet, the insulation board is 10 mm thick, the polystyrene foam layer is 25 mm, the plastic layer is 3 mm thick, the insulation board is 15 mm, the polypropylene is 10 mm, and the top layer is a tatami mat as shown in FIG. Antibacterial mat was arranged.

The plastic layer is most preferably composed of so-called plastic cardboard.

  By adopting this configuration, the entire tatami mat is designed to absorb the shock while realizing a sink that does not interfere with foot struts, body separation, and struts when taking a technique. In addition, the judo tatami of Example 3 can be used also in the official match venue of the All Japan Judo Federation.

  In order to confirm the impact absorption effect of the tatami mat constructed as described above, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 16, the peak acceleration was 830.98. When a comparative experiment was performed using a tatami having the same configuration without the through hole 30, the peak acceleration was almost the same as 829.73 as shown in FIG. However, since the air permeability is greatly improved by the presence of the through hole 30, as a judo tatami mat used at the official match venue of the All Japan Judo Federation, it should keep a clean state for a long time while maintaining the same feel as before. Is possible.

  Example 4 is a judo tatami mat suitable for athletes during the development of junior high school students and younger. As shown in FIG. 18, the polyethylene sheet, the chip urethane layer are 10 mm thick, the polypropylene foam layer is 25 mm, the insulation board is 15 mm, the special chemical fiber layer is 10 mm, and the uppermost layer is an antibacterial tatami mat as a tatami mat. A mat was placed.

  By adopting this configuration, the upper layer is made of a material in which impact does not easily bounce back to the body, and the middle layer and lower layer absorb strong impact. Therefore, it is most suitable for practice of pitching. Therefore, a dojo with a higher educational effect can be realized by using only a part of the dojo as the tatami mat of the fourth embodiment.

  In order to confirm the impact absorption effect of the tatami mat constructed as described above, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 19, the peak acceleration was 664.22. When a comparative experiment was performed using a tatami having the same configuration without the through-hole 30, the peak acceleration was 676.83 as shown in FIG. 20, and it was confirmed that the shock absorption increased due to the presence of the through-hole 30. It was.

  Example 5 is a tatami mat suitable for a place with a heavy load on the tatami floor such as a busy corridor or a banquet hall. As shown in FIG. 21, a polyethylene sheet, an insulation board of 10 mm, an insulation board of 10 mm, an insulation board of 15 mm, an insulation board of 15 mm, and an antibacterial tatami sheet as a tatami mat were arranged on the uppermost layer as shown in FIG. Since most of the tatami floors are composed only of insulation boards, they are virtually composed only of wood. Therefore, there is a merit that it is easier to deal with than other configurations in terms of recycling.

In order to confirm the impact absorption effect of the tatami mat constructed as described above, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 22, the peak acceleration was 689.74. When a comparison experiment was performed using a tatami mat having the same configuration without the through hole 30, the peak acceleration was 731.63 as shown in FIG. 23, and it was confirmed that the shock absorption increased due to the presence of the through hole 30. It was.

  Example 6 is a lightweight tatami mat. As shown in FIG. 24, a polyethylene sheet and polystyrene foam were 35 mm from the bottom layer, an insulation board was 15 mm, and an antibacterial tatami sheet was placed on the top layer as a tatami mat. Polystyrene foam occupies the most, so it is not only very lightweight, but also has a moisture-resistant polystyrene foam on the underside of the tatami mat, making it suitable for direct-laying concrete where moisture tends to rise, making it ideal for condominium use It is.

  In order to confirm the impact absorbing effect, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 25, the peak acceleration was 716.71. When a comparative experiment was performed using a tatami mat having the same configuration without the through-hole 30, the peak acceleration was 771.73 as shown in FIG. 26, and it was confirmed that the shock absorption increased due to the presence of the through-hole 30. It was.

  Example 7 is a tatami mat suitable for high-grade use. As shown in FIG. 27, from the bottom layer, a polyethylene sheet, an insulation board of 10 mm, a polystyrene foam of 25 mm, an insulation board of 15 mm, and an antibacterial tatami sheet as a tatami mat were arranged on the top layer. Since the insulation is arranged on the lower side, it is strong against warping and is suitable for high-grade products as compared with the sixth embodiment.

  In order to confirm the impact absorbing effect, an impact test was conducted at the Osaka Prefectural Industrial Technology Research Institute. A sample product having a length of 200 mm and a width of 200 mm was manufactured, and the magnitude of impact when a weight of 20 kg was dropped from above 1 m was measured.

  As shown in FIG. 28, the peak acceleration was 699.81. When a comparative experiment was performed using a tatami having the same configuration without the through hole 30, the peak acceleration was 836.71 as shown in FIG. 29, and the shock absorption was significantly increased by the presence of the through hole 30. It could be confirmed.

As mentioned above, although embodiment of this invention was described, some or all of embodiment of this invention is described as the following additional remarks.
[Appendix 1]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of an insulation board and an elastic cushion layer,
And the tatami for judo in which multiple through-holes which penetrate a tatami floor are formed.
[Appendix 2]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of, in order from the bottom layer, a polyethylene sheet, a layer of artificial turf with turf yarns planted on a base fabric, a layer of polystyrene foam, an insulation board, and a layer of polypropylene. A judo tatami mat with multiple through holes that penetrate the floor from the bottom to the top.
[Appendix 3]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a non-woven fabric layer composed of polyethylene sheet, polyethylene terephthalate and polypropylene in order from the bottom layer, a polystyrene foam layer, an insulation board, a polypropylene layer, and the tatami floor from the bottom layer. A judo tatami mat with multiple through holes that penetrate to the top layer.
[Appendix 4]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet and an insulation board in order from the lower layer, and a plurality of through holes are formed through the tatami floor from the lower layer to the upper layer.
[Appendix 5]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet, a polystyrene foam layer, and an insulation board in order from the bottom layer, and a plurality of through holes that penetrate the tatami floor from the bottom layer to the top layer are formed.
[Appendix 6]
A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet, an insulation board, a polystyrene foam layer, and an insulation board in order from the lowest layer, and a plurality of through-holes penetrating the tatami floor from the lowermost layer to the uppermost layer are formed. tatami.
[Appendix 7]
The tatami mat according to any one of supplementary notes 1 to 6, wherein an elastic and deformable protective pipe is mounted on an inner peripheral surface of the through hole.
[Appendix 8]
The tatami mat according to appendix 7, wherein the protective pipe has a cavity, and the cavity includes a spring.
[Appendix 9]
The tatami mats according to appendices 7 and 8, wherein the protective pipe includes an air valve [Appendix 10]
The tatami mat according to any one of appendices 4 to 9, wherein a groove is formed on the back surface of the tatami floor.
[Appendix 11]
The tatami mat according to any one of appendices 1 to 10, wherein the through hole has a cylindrical shape with a diameter of 8 mm.
[Appendix 12]
Integrating the insulation board and the cushion layer with a tatami thread to form a tatami floor;
Drilling a hole in the tatami mat using a hollow drill to form a through hole penetrating the tatami floor; and
A method for producing tatami mats, comprising a step of integrating a tatami mat with a tatami floor to form a tatami mat.
[Appendix 13]
Integrating the insulation board and the cushion layer with a tatami thread to form a tatami floor;
Drilling a hole in the tatami mat using a hollow drill to form a through hole penetrating the tatami floor; and
Inserting a protective pipe into the through hole;
A method for producing tatami mats, comprising a step of integrating a tatami mat with a tatami floor to form a tatami mat.

DESCRIPTION OF SYMBOLS 1 Tatami 10 Tatami surface 20 Tatami floor 21 Cushion layer 30 Through-hole 32 Protection pipe 40 Substrate 50 Drilling machine 51 Hollow drill 52 Protection pipe insertion mechanism

Claims (13)

A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of an insulation board and an elastic cushion layer,
And the tatami for judo in which multiple through-holes which penetrate a tatami floor are formed. A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of, in order from the bottom layer, a polyethylene sheet, a layer of artificial turf with turf yarns planted on a base fabric, a layer of polystyrene foam, an insulation board, and a layer of polypropylene. A judo tatami mat with multiple through holes that penetrate the floor from the bottom to the top. A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a non-woven fabric layer composed of polyethylene sheet, polyethylene terephthalate and polypropylene in order from the bottom layer, a polystyrene foam layer, an insulation board, a polypropylene layer, and the tatami floor from the bottom layer. A judo tatami mat with multiple through holes that penetrate to the top layer. A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet and an insulation board in order from the lower layer, and a plurality of through holes are formed through the tatami floor from the lower layer to the upper layer. A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet, a polystyrene foam layer, and an insulation board in order from the bottom layer, and a plurality of through holes that penetrate the tatami floor from the bottom layer to the top layer are formed. A tatami mat having a tatami floor and a tatami surface covering the surface of the tatami floor,
The tatami floor is composed of a polyethylene sheet, an insulation board, a polystyrene foam layer, and an insulation board in order from the lowest layer, and a plurality of through-holes penetrating the tatami floor from the lowermost layer to the uppermost layer are formed. tatami. The tatami mat according to any one of claims 1 to 6, wherein a protective pipe that is elastic and deformable is attached to an inner peripheral surface of the through hole. The tatami mat according to claim 7, wherein the protection pipe has a cavity, and the cavity is provided with a spring.   The tatami mat according to claim 7, wherein the protection pipe includes an air valve. The tatami mat according to any one of claims 4 to 9, wherein a groove is formed on a back surface of the tatami floor. The tatami mat according to any one of claims 1 to 10, wherein the through hole has a cylindrical shape with a diameter of 8 mm. Integrating the insulation board and the cushion layer with a tatami thread to form a tatami floor;
Drilling a hole in the tatami mat using a hollow drill to form a through hole penetrating the tatami floor; and
A method for producing tatami mats, comprising a step of integrating a tatami mat with a tatami floor to form a tatami mat. Integrating the insulation board and the cushion layer with a tatami thread to form a tatami floor;
Drilling a hole in the tatami mat using a hollow drill to form a through hole penetrating the tatami floor; and
Inserting a protective pipe into the through hole;
A method for producing tatami mats, comprising a step of integrating a tatami mat with a tatami floor to form a tatami mat.