JP2024057915A - Martial arts hall floor structure and martial arts hall floor construction method - Google Patents

Abstract

[Problem] To realize a floor structure for a martial arts hall that has suitable shock absorption and durability against steps by athletes, while being easy to maintain. [Solution] A floor structure for a martial arts hall comprising: a joist member (10) extending along a first direction; a plurality of support members (20) provided at predetermined intervals in the first direction and supporting the joist members (10); and a plurality of floor plate members (50) fixed to the upper surfaces of the joist members (10) while being bridged between at least two adjacent joist members (10) in a second direction perpendicular to the first direction, the support members (20) having a base portion (21) for installation on the floor foundation, and a retaining portion (22) for retaining the lower surface and both side surfaces of the joist members (10), the base portion (21) and the retaining portion (22) being integrally formed from an elastic body, and the butting surfaces of the floor plate members (10) adjacent in the first direction and the second direction are both flat surfaces. [Selected Figure] Fig. 2

Description

The present invention relates to a floor structure for a martial arts hall and a method for constructing a floor for a martial arts hall.

Traditionally, martial arts halls such as kendo halls have been known that use wooden flooring members. For example, Patent Document 1 discloses technology related to a floor cushioning structure that supports beams 4 with flooring support legs 2 having support bases 20, support bolts 22, and receiving members 30, and places joists 6, structural boards 8, and flooring 10 on top of the beams 4, providing good cushioning for sports facilities such as judo and kendo halls and high load-bearing capacity when holding events.

JP 2007-56486 A

The floors of such martial arts halls must have adequate shock absorption when athletes step on them, while also being durable enough to resist damage when they step on them. For example, when used as a kendo hall, athletes step on the floorboards barefoot, and if the shock absorption is insufficient, they may injure their feet or develop symptoms such as blood in the urine. In addition, there is a risk that the floorboards may crack or break when stepped on, so if damage does occur, it is desirable for the floor to be easily maintainable, allowing damaged areas to be replaced easily and at low cost.

The present invention was made in consideration of the above-mentioned problems with the conventional arts, and its purpose is to realize a floor structure for a martial arts hall that is easy to maintain while providing adequate shock absorption and durability against the steps of athletes.

The main invention of the present invention for solving the above problems is a floor structure for a martial arts hall comprising: a rectangular pillar-shaped joist member extending along a first direction; support members that are provided at predetermined intervals in the first direction and support the joist members a predetermined height above the floor foundation; and a plurality of floor plate members that are fixed to the upper surfaces of the joist members while being bridged between at least two of the joist members that are adjacent in a second direction perpendicular to the first direction, wherein the support members have a base portion for installation on the floor foundation and retaining portions that hold the bottom surface and both side surfaces of the joist members, the base portion and the retaining portions are integrally formed from an elastic body, and the abutting surfaces of the floor plate members that are adjacent in the first direction and the second direction are both flat.
Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings.

This invention makes it possible to realize a martial arts hall floor structure that is easy to maintain while providing adequate shock absorption and durability against the steps of athletes.

1A and 1B are plan and cross-sectional views showing the floor structure of a kendo hall. FIG. 1 is a perspective view for explaining the specific configuration of the floor structure of a kendo hall. 3A and 3B are diagrams illustrating an example of the structure of a floor in a conventional martial arts hall. 13 is a diagram illustrating the detailed structure of the floorboard member 50 supported by the support member 20 and the beam member 10. FIG. 5A and 5B are diagrams for explaining the structure of the butt surfaces of general floor panel members as a comparative example. 6A and 6B are diagrams illustrating the structure of the butt surfaces of the floorboard members of this embodiment. FIG. 2 is a flow chart illustrating a construction method for a floor structure according to the present embodiment. 11A to 11C are diagrams illustrating an example of a method for replacing a floor panel member 50. 9A and 9B are diagrams illustrating another example of a method for replacing the floorboard member 50. FIG.

The present specification and accompanying drawings make clear at least the following:

(Aspect 1)
A floor structure for a martial arts hall comprising: a rectangular prism-shaped beam member extending along a first direction; support members provided at predetermined intervals in the first direction and supporting the beam member a predetermined height above the floor foundation; and a plurality of floor plate members fixed to the upper surfaces of the beam members while spanning at least two of the beam members adjacent in a second direction perpendicular to the first direction, wherein the support members have a base portion for installation on the floor foundation and retaining portions for retaining the underside and both side surfaces of the beam members, the base portion and the retaining portions being integrally formed from an elastic body, and the abutting surfaces of the floor plate members adjacent in the first direction and the second direction are both flat.

According to the floor structure of the martial arts hall of the first aspect, the bottom and both sides of the slats are supported by the support members integrally formed from elastic rubber without using metal support members, so that the slats and floor members are easily held stably when impacts are received in the vertical and horizontal directions without the support members undergoing plastic deformation. Furthermore, when an athlete steps on the slats, the impact acting on the slats is absorbed through the floor members, generating an appropriate repulsive force, so problems such as hematuria due to the athlete's march are unlikely to occur. In addition, since there is no unevenness (tongue) on the butt surfaces of adjacent floor members, the butt surfaces are unlikely to be damaged when impacts are received. Furthermore, since adjacent floor members are not fitted together by unevenness (tongue), and each floor member can be attached and detached independently from the slats, even if a floor member is damaged, only the damaged floor member can be easily replaced. This makes it possible to realize a floor structure of the martial arts hall that has appropriate shock absorption and durability against the athlete's steps, while also being easy to maintain.

(Aspect 2)
A floor structure for a martial arts hall according to aspect 1, wherein each of the plurality of floorboard members is constructed from a single wooden board.

According to the martial arts hall floor structure of aspect 2, no adhesive or bonding parts are formed in the floorboard members, so durability against stepping on them is improved and they are less likely to crack. In addition, because no adhesives or the like are used to join the floorboard members together, chemical substances are less likely to affect the human body, making it safe.

(Aspect 3)
A floor structure for a martial arts hall according to Aspect 1 or Aspect 2, wherein each of the plurality of floorboard members is fixed to the joist members using fastening members that penetrate the floorboard members in the thickness direction.

According to the martial arts hall floor structure of aspect 3, each floorboard component can be fixed and removed independently from the joist members, allowing maintenance and repairs to be carried out in the smallest unit possible without affecting other floorboard components arranged adjacently.

(Aspect 4)
A floor structure for a martial arts hall according to any one of Aspects 1 to 3, which has a cover member that covers the upper end of the fastening member, and the through holes that penetrate the floorboard members are blocked by the cover member.

According to the floor structure of the martial arts hall of aspect 4, the through holes in the floor board members are blocked, and the floor surface of the martial arts hall is formed smoothly, making it easier to ensure the safety of athletes. In addition, the cover member itself can be easily removed from the through holes, and maintenance and repairs of the floor board members can be performed without interfering with the attachment and removal of the fastening members.

(Aspect 5)
The floor structure for a martial arts hall according to any one of Aspects 1 to 4, wherein the surface of the floorboard members is thinly scraped off and no liquid agent is applied thereto.

The martial arts hall floor structure of aspect 5 is safe for barefoot athletes, does not create too much friction with the soles of the feet, and provides a comfortable, non-slip surface. In addition, the surface of the floorboard members is scraped off with a plane or the like, allowing athletes to easily feel the smooth, comfortable texture of the wood.

(Aspect 6)
A martial arts hall floor structure according to any one of Aspects 1 to 5, wherein the retaining portion has a pair of side walls that sandwich one side surface and the other side surface of the joist member in the second direction, and the distance in the second direction at the upper ends of the pair of side walls is narrower than the distance in the second direction at the lower ends of the pair of side wall portions.

According to the martial arts hall floor structure of aspect 6, the elastic force of the elastic body acts on the upper ends of the pair of side walls in a direction that pinches both sides of the main beam member, so the main beam member can be held more stably. As a result, even if an impact is applied to the main beam member when an athlete steps on it, the impact is easily absorbed by the support member, and the main beam member can be supported stably.

(Aspect 7)
A floor construction method for a martial arts hall, comprising the steps of: a support member installation process for attaching support members to joists; a support member installation process for installing the support members attached to the joists on a floor foundation; and a floor plate member installation process for attaching floor plate members to the joists, wherein the support members have a base portion for installation on the floor foundation and retaining portions for holding the underside and both side surfaces of the joists, the base portion and the retaining portions are integrally formed from an elastic body, and the abutting surfaces of the floor plate members adjacent in the planar direction are all flat.

The martial arts hall floor construction method of aspect 7 makes it possible to realize a martial arts hall floor structure that is easy to maintain while providing adequate shock absorption and durability against athletes' steps.

====Embodiment===
As an example of the floor structure of a martial arts hall according to this embodiment, the floor structure of a kendo hall will be described. In this specification, a certain direction on a horizontal plane is defined as the "first direction", and a direction on the horizontal plane that is perpendicular to the first direction is defined as the "second direction". Below, the first direction and the second direction may be collectively referred to as the "planar direction". Furthermore, the direction perpendicular to the first and second directions and along the vertical direction is defined as the "up-down direction".

<Basic floor structure>
Fig. 1 shows a plan view and a cross-sectional view of the floor structure of a kendo dojo. Fig. 1 shows a plane view of part of the floor structure of a kendo dojo as seen from above in the vertical direction, and the A-A cross section of said plane. Fig. 2 is a perspective view for explaining the specific configuration of the floor structure of a kendo dojo.

The floor of the kendo hall in this embodiment is equipped with multiple beam members 10, support members 20, and floorboard members 50. The beam members 10 are wooden beam members in the shape of a rectangular pillar. In this embodiment, as shown in FIG. 1, multiple beam members 10, 10... are arranged in a line in the second direction with a distance W10 between them, with their longitudinal directions aligned in the first direction, to form a so-called floor structure and support the floorboard members 50. Each beam member 10 has a cross-sectional shape that is approximately square, measuring 90 mm to 120 mm square, and is made of, for example, Japanese cypress or other wood. The distance W10 can be, for example, approximately 600 mm. However, the size and arrangement of the beam members 10 can be changed as appropriate depending on the size of the kendo hall and the environment in which it is used.

The support members 20 are installed on the floor foundation (for example, a concrete foundation, hereinafter also referred to as the "floor foundation GL") of the kendo hall and support the beam members 10 at a predetermined height above the floor foundation GL. In other words, they support each beam member 10 so that the heights of the upper surfaces of the multiple beam members 10, 10... are uniform. In FIG. 1, each beam member 10 is supported by multiple support members 20 arranged at intervals L20 in the first direction. The interval L20 at which the support members 20 are arranged can be, for example, about 1200 mm. In addition, it is preferable to shift the arrangement (support position) of the support members 20 in the first direction between two beam members 10, 10 adjacent to each other in the second direction, as shown in FIG. 1. However, the interval L20 and the support height of the beam members 10 can be changed as appropriate depending on the size of the kendo hall and the usage environment.

2, the support member 20 has a base portion 21 and a holding portion 22. The base portion 21 is a portion for installing the support member 20 on the floor foundation GL, and the bottom surface of the base portion 21 is configured to be flat. The holding portion 22 is a portion for holding the beam member 10, and has a placement portion 22b on which the beam member 10 is placed and supported in the vertical direction, and a pair of side walls 22s, 22s that protrude upward in the vertical direction from both sides of the placement portion 22b in the second direction. The placement portion 22b and the pair of side walls 22s, 22s of the holding portion 22 hold the lower surface and both side surfaces of the rectangular column-shaped beam member 10, thereby stably supporting the beam member 10.

In this embodiment, the support member 20 is integrally formed from an elastic body. For example, the base 21 and the holding part 22 are integrally formed using a material such as elastic rubber (natural rubber or synthetic rubber) that contains sulfide. This allows for both the strength to support the load of the kendo hall floor and the vibration-proofing properties to appropriately absorb and dampen vibrations and shocks caused by the athlete's steps, etc. Note that the elastic body that makes up the support member 20 can be made of materials other than elastic rubber, such as silicone or elastomer resin.

The floorboard members 50 are rectangular wooden boards that make up the floor of the kendo hall. In this embodiment, each of the multiple floorboard members 50 is arranged with its long side aligned along the second direction and is fixed to the upper surface of the multiple beam members 10 adjacent to each other in the second direction while spanning them. In FIG. 1, one floorboard member 50 is arranged spanning four beam members 10 that are adjacent to each other in the second direction, but each floorboard member 50 only needs to span between at least two beam members 10, 10. In this case, it is preferable that the end of the floorboard member 50 in the longitudinal direction (second direction) is arranged in a position that overlaps with one of the beam members 10.

The floorboard member 50 is made of a single wooden board (solid wood), and at least the upper surface in the vertical direction (i.e. the surface that the athlete steps on) has been planed off, and no liquid agents such as paint or coating materials have been applied. When used as the floor of a kendo hall, it is expected that the athlete will step on it barefoot, so the wood that makes up the floorboard member 50 is preferably one that has a certain degree of strength and flexibility while also being pleasant to the touch; for example, cedar can be used.

The floor plate member 50 is fixed to the upper surface of the joist member 10 using fastening members 60 such as wood screws. In FIG. 2, at the position where the floor plate member 50 and the joist member 10 overlap when viewed in the vertical direction, a screw hole 55 (through hole) that penetrates the floor plate member 50 in the vertical direction is provided, and the fastening member 60 (wood screw) is inserted into the screw hole 55 (through hole) and tightened, the joist member 10 and the floor plate member 50 are fastened via the fastening member 60. Then, a cover member 70 is further fitted from above the fastening member 60 into the screw hole 55 into which the fastening member 60 is inserted, so that no step is created on the upper surface of the floor plate member 50. The cover member 70 is a cylindrical member made of wood equivalent to the floor plate member 50, and functions as a lid to close the screw hole 55. In the floor structure of a martial arts hall, if holes such as the screw hole 55 are exposed on the surface of the floor plate member 50, it may cause injuries or accidents. In particular, in sports such as kendo, which are played barefoot, it is dangerous because the athlete's toes can easily get caught in the screw holes 55. In contrast, the cover member 70 makes the surface of the floorboard member 50 flush, allowing athletes to play barefoot in safety.

<Issues associated with participating in barefoot sports>
Generally, in sports (martial arts) that are performed barefoot, athletes step on the floor of the martial arts hall barefoot. For example, in kendo, when swinging a bamboo sword, the foot is pressed hard against the floor, causing repeated strong impacts. As a result, it has been reported that people are more likely to develop intravascular hemolysis (march hematuria), which causes hemoglobinuria due to physical and mechanical intravascular hemolysis in the capillaries of the soles of the feet (see A Case of Kendo March Hemoglobinuria Syndrome with Iron Deposition in the Renal Tubules: Journal of the Japanese Society of Internal Medicine, Vol. 106, No. 6, pp. 1191-1198, 2017).

In addition, the impact of stepping on the dojo itself may make it more susceptible to damage. For example, the floorboards of the dojo may develop cracks or fissures, or the support members that hold up the floorboards may be damaged, resulting in problems with durability and maintainability.

Figures 3A and 3B are diagrams explaining an example of a conventional martial arts hall floor structure. Figure 3A is a schematic perspective view showing a floor structure that uses floor beams to support beam members. In the floor structure shown in Figure 3A, multiple floor beams 120, 120 are installed on the floor foundation GL, and beam members 10 are supported by the floor beams 120, and floor plate members 50 (not shown in Figure 3A) are placed on top of the beam members 10. In other words, the beam members 10 are supported by floor beams 120 instead of the elastic rubber support members 20 described in Figures 1 and 2.

The floor beams 120 are rod-shaped metal members whose height can be adjusted in the vertical direction, and are also known as "steel beams." Floor structures using floor beams 120 are also widely used in general buildings other than martial arts halls, and the use of metal floor beams 120 makes it easier to ensure the strength required to support the beam members 10 while suppressing damage from drying, shrinkage, and pests.

However, a floor structure using the floor beams 120 does not take into account the impact of the "stepping in" in kendo as described above, and problems may arise if it is used as a kendo hall. For example, if a momentary impact force acts in the axial direction (up and down) of the floor beams 120 due to stepping in, a part of the floor beams 120 may deform or tilt. In this case, the joists 10 may not be able to be safely supported, or the floor board members 50 may be distorted. In addition, when repairing or maintaining the floor structure shown in FIG. 3A, it is necessary to remove the floor board members 50 and the joists 10 once, identify the defective part, and replace the floor beams 120, which requires a lot of time and cost. In addition, the vertical force generated by the stepping in of the athlete is not absorbed by the floor beams 120, so the force of the stepping in acts directly on the athlete's feet as a repulsive force, which may make it easier to develop marching hematuria.

Next, FIG. 3B is a schematic cross-sectional view showing a floor structure in which floor plate members 50 are directly placed on the floor foundation GL. In the floor structure shown in FIG. 3B, multiple floor plate members 50 are directly arranged on the floor foundation GL without using floor beams 120 (support members 20) or joist members 10, and are fixed using adhesives or the like. In this way, the structure is simple, and problems such as deformation of the floor beams 120 due to the impact of stepping on the floor do not occur, so the cost and effort required to replace the floor beams 120 can be reduced compared to the case of FIG. 3A. However, in the case of FIG. 3B, the impact of stepping on the floor is difficult to absorb, and a large repulsive force is likely to act on the feet of the athletes, so there are significant safety issues when used as a martial arts hall for barefoot sports such as kendo. In addition, since the impact of stepping on the floor plate members 50 acts directly on the floor plate members 50, the floor plate members 50 themselves are prone to cracking, and maintenance issues also arise.

In contrast, the floor structure of this embodiment makes it easier to reduce the impact on the athlete's feet and problems related to maintenance, as described above. Figure 4 is a diagram explaining the detailed structure of the support member 20 and the joist member 10 that supports the floor plate member 50 in this embodiment.

First, in the floor structure of this embodiment, the beam member 10 is held by the support member 20 in which the base portion 21 and the holding portion 22 are integrally formed by elastic rubber or the like. Specifically, the lower surface 10b of the beam member 10, which has a rectangular cross section, is held by the placement portion 22b of the holding portion 22, and both left and right side surfaces (right side surface 10rs, left side surface 10ls) of the beam member 10 are held by the side wall portions 22s, 22s of the holding portion 22, respectively. Since the beam member 10 is supported without using a metal support member such as the floor beam 120 (see FIG. 3A) used in conventional floor structures, the support member 20 can stably hold the beam member 10 and the floor plate member 50 without plastic deformation or damage when it receives an impact due to an athlete's stepping on it, etc.

The elastic rubber support member 20 absorbs the impact that acts on the rail member 10 through the floor plate member 50 when the athlete steps forward, generating an appropriate repulsive force, making it difficult for the athlete to develop problems such as hematuria. At that time, the impact in the up-down direction (vertical direction) and in the horizontal direction (first and second directions) is absorbed by the mounting portion 22b and the side wall portions 22s, 22s, respectively, making it difficult for the floor plate member 50 and the rail member 10 to shift out of position or become damaged. This makes it possible to realize a floor structure for a martial arts hall that has appropriate repulsive properties and durability against the athlete's steps.

Furthermore, in this embodiment, the butt surfaces of the multiple floor panel members 50, 50 arranged on the joist member 10 are all configured to be flat, making the floor panel members 50 less likely to be damaged, and even if they are damaged, they can be easily repaired or maintained. Figures 5A and 5B are diagrams explaining the structure of the butt surfaces of general floor panel members as a comparative example. Figures 6A and 6B are diagrams explaining the structure of the butt surfaces of the floor panel members of this embodiment.

The floor of a building is formed by arranging multiple floorboard members side by side in a planar direction (perpendicular to the up-down direction), and in this case, it is common for uneven parts to be formed on the opposing faces (butting faces) of floorboard members adjacent in the planar direction. In FIG. 5A, floorboard member 50A and floorboard member 50B are arranged adjacent to each other in the planar direction. A recess 51 is formed on face 50At of floorboard member 50A, and a protrusion 52 is formed on face 50Bt of floorboard member 50B facing face 50At. The recess 51 and the protrusion 52 are so-called "tongues", and by fitting together, the relative positions of floorboard member 50A and floorboard member 50B arranged adjacent to each other are fixed, and height variations and deformation of the floorboard members are suppressed. When the concave portion 51 and the convex portion 52 (tongue) are mated, it is necessary to drive in nails to fix the mating portion and fill in the gaps in the mating portion with adhesive or paint.

When a floor structure with recesses 51 and protrusions 52 (tongues) like the floorboard members 50A and 50B of the comparative example is adopted in a martial arts hall such as a kendo hall, the recesses 51 and protrusions 52 may be easily damaged. For example, when an impact from stepping acts on the joint between the recesses 51 and protrusions 52, stress is concentrated at the base of the recesses 51 and protrusions 52, which may cause cracks or fissures in the recesses 51 and protrusions 52 as shown in FIG. 5B, making them more likely to break. In this case, for safety reasons, it becomes necessary to replace the floorboard members 50A and 50B, which increases the effort and cost required for maintenance and repairs.

In contrast, in the floor structure of this embodiment, as shown in FIG. 6A, the opposing surfaces (butting surfaces) 50Ct, 50Dt of floor plate members 50C and 50D arranged side by side in a planar direction have no unevenness (tongue). In other words, the opposing surfaces (butting surfaces) 50Ct, 50Dt are both formed flat. Then, as shown in FIG. 6B, with the surfaces 50Ct and 50Dt facing each other and abutting against each other, the floor plate members 50C, 50D are each fixed to the joist member 10 using fastening members 60.

The butt surfaces 50Ct, 50Dt of the adjacent floor plate members 50C, 50D do not have any unevenness (tongue) as in the comparative example, so even if an impact is applied by stepping on them, the floor plate members 50C, 50D are less likely to be damaged, and durability is improved. And since each floor plate member 50C, 50D is fixed to the joist member 10 by the fastening member 60, even without unevenness (tongue), positional deviation is less likely to occur. Furthermore, the adjacent floor plate members 50C, 50D are not fitted into each other by unevenness (tongue), and can be attached and detached independently from the joist member 10. Therefore, for example, if damage occurs to the floor plate member 50C, it is possible to easily remove and replace only the damaged floor plate member 50C, and there is no need to remove the floor plate member 50D. Therefore, it is possible to improve maintainability compared to the comparative example.

In addition, in the floor structure of this embodiment, each of the multiple floorboard members 50, 50... is made of a single wooden board. In other words, it is made of solid board members, different from plywood or laminated lumber, which are made by gluing multiple boards together. Because the floorboard members 50 themselves do not have any adhesive or pasting parts, they are more durable against the impact of athletes stepping on them, and are less likely to crack. And because no adhesives or the like are used to join the stacked boards together, chemical substances are less likely to have an effect on the human body, making them ideal for places such as kendo halls where athletes compete barefoot.

In addition, each floor panel member 50 is fixed to the joist member 10 using a fastening member 60 that penetrates the floor panel member 50 in the thickness direction (the vertical direction in FIG. 2). Therefore, as explained in FIG. 6B, each floor panel member 50 can be fixed and removed independently from the joist member 10, and maintenance and repairs can be performed in the smallest unit without affecting other floor panel members 50 arranged adjacently.

The floor structure of this embodiment also has a cover member 70 that covers the upper end (i.e., the head of the screw) of the fastening member 60 that secures the floorboard member 50 to the joist member 10. The cover member 70 closes the screw hole 55 in the floorboard member 50, making the entire floor of the martial arts hall smooth (without any major irregularities), making it easier to ensure the safety of athletes. Furthermore, the cover member 70 itself can be easily removed from the screw hole 55, making it possible to perform maintenance and repairs on the floorboard member 50 without interfering with the attachment and removal of the fastening member 60.

The surface of the floorboard members 50 is thinly scraped off using a plane, and no liquids such as paint or coating materials are applied. This makes it safe for barefoot players to play the game, prevents excessive friction with the soles of the feet, and provides a pleasant, non-slip feel. In addition, in the floor structure of this embodiment, there are no irregularities between the opposing surfaces of the floorboard members 50, 50 that are arranged next to each other in the horizontal direction, so there is no need to harden the joints of the irregularities with adhesives, coating materials, etc. This makes it easy for players to feel the smooth, pleasant feel of the wood whose surface has been scraped off using a plane.

In addition, the support member 20 supporting the beam member 10 has a pair of side walls 22s, 22s in the second direction (planar direction), and the side walls 22s, 22s sandwich the side surface 10rs on one side of the beam member 10 and the side surface 10ls on the other side, thereby enabling the beam member 10 to be stably supported. As shown in FIG. 4, the distance W22s in the second direction at the upper ends of the pair of side walls 22s, 22s is narrower than the distance W22b in the second direction at the lower ends (W22s>W22b). In other words, the distance in the second direction between the pair of side walls 22s, 22s is narrower the higher in the vertical direction. The distance W22b (corresponding to the length of the mounting portion 22b in the second direction) between the lower ends of the pair of side walls 22s, 22s is approximately equal to the length W10 of the lower surface 10b of the beam member 10 in the second direction (W22b = W10b).

Therefore, the pair of side wall portions 22s, 22s can precisely support the underside 10b of the rail member 10 at the lower end in the vertical direction (i.e., the mounting portion 22b) without misalignment. On the other hand, at the upper end in the vertical direction, the elastic force of the elastic rubber acts in a direction that pinches both side surfaces 10rs, 10ls of the rail member 10, so the rail member 10 can be held more stably. As a result, even if an impact is applied to the rail member 10 in the vertical or horizontal direction due to the athlete stepping on it, the impact is easily absorbed by the support member 20, and the rail member 10 can be stably supported.

In addition, in the floor structure of this embodiment, the support positions of the support members 20 of two adjacent beam members 10, 10 in the second direction are shifted in the first direction. Specifically, as shown in FIG. 1, the support member 20 supporting the beam member 10 adjacent to the beam member 10 in the second direction is disposed at the midpoint in the first direction between the support members 20, 20 supporting a certain beam member 10. This makes it easier for the impact of stepping on the floor board member 50 to be distributed in a balanced manner across the entire floor surface, making it easier for the support members 20 to absorb the impact efficiently. In other words, the force of the impact borne by each support member 20 is more easily distributed evenly, and the impact absorption performance (elastic performance of the support members 20) of the entire floor structure can be improved.

<Floor structure construction and repair methods>
Next, a construction method for the floor structure according to this embodiment and a repair method (maintenance method) in the event that the floor panel member 50 is damaged will be described.

Figure 7 is a flow diagram explaining the construction method of the floor structure according to this embodiment. First, the support member attachment process is performed to attach the support member 20 to the joist member 10 (S101). In the support member attachment process, multiple support members 20, 20... are attached at intervals L20 in the longitudinal direction of the joist member 10 (corresponding to the first direction in Figure 1). As described in Figure 4, the holding portion 22 of the support member 20 can hold both sides of the joist member 10 by sandwiching them with a pair of side wall portions 22s, 22s, so that the support member 20 can be easily attached without using special tools, etc. After the support member 20 is attached to the joist member 10, nails, etc. may be driven from the outside to the inside of the pair of side wall portions 22s, 22s in the second direction to more firmly fix the support member 20 to the joist member 10.

Next, a support member installation process is performed in which the base portion 21 of the support member 20 is installed at a predetermined position on the floor foundation GL with the support member 20 attached to the beam member 10 (S102). The position at which the support member 20 is installed is determined in advance according to the arrangement of the multiple beam members 10, 10... as shown in FIG. 1, and the beam members 10, 10... are supported at a predetermined height above the floor foundation GL (floor assembly). Since the support member 20 in this embodiment is made of elastic rubber or the like, a large frictional force acts between the floor foundation GL and the base portion 21 based on the load of the beam member 10. Therefore, the structure is such that positional deviation is unlikely to occur simply by placing the base portion 21 on the floor foundation GL. However, positional deviation may be more unlikely to occur by attaching the support member 20 to the floor foundation GL using adhesives, fixing bolts, or the like.

Next, a floor plate member attachment process is performed in which the floor plate member 50 is attached onto the beam member 10 (S103). In the floor plate member attachment process, the floor plate member 50 is arranged so as to span between at least two beam members 10, 10 adjacent to each other in the second direction as shown in FIG. 1, and the floor plate member 50 is fixed to the beam member 10 using the fastening member 60. The screw hole 55 into which the fastening member 60 is inserted may be formed in the floor plate member 50 in advance, or may be formed while adjusting the position after the floor plate member 50 is placed on the beam member 10. Then, after the floor plate member 50 is fixed to the beam member 10 by the fastening member 60, the cover member 70 is fitted over the fastening member 60, and the screw hole 55 is closed. Through these processes, the floor structure shown in FIG. 1 is constructed.

When repairing or maintaining the floor structure, the flow described in Figure 7 can be carried out in reverse order. For example, if replacement of the beam member 10 is required, the cover member 70 and fastening member 60 are removed, and the floor plate member 50 is detached from the beam member 10 (S103). Next, the support member 20 is removed from the floor foundation GL (S102), and the beam member 10 to be replaced is removed from the support member 20 and replaced with a new beam member 10.

A typical form of damage that is expected in the floor structure according to this embodiment is that the floor panel member 50 itself will break or crack. In this case, it will be necessary to replace the damaged floor panel member 50. Below, we will specifically explain how to replace the floor panel member 50.

Figure 8 is a diagram explaining an example of a method for replacing floorboard member 50, and similar to Figure 1, shows a plan view of part of the floor structure of a kendo hall as viewed from above in the vertical direction. In Figure 8, multiple beam members 10, 10 are arranged at a predetermined interval in the second direction, and floorboard member 50F is arranged spanning four adjacent beam members 10A-10D. A crack has appeared in floorboard member 50F at the middle position in the second direction (the position between beam members 10B and 10C in Figure 8), so replacement work for floorboard member 50F is to be performed.

First, all fastening members 60 (cover members 70) that attach the floor plate member 50F to the four beam members 10A-10D are removed. Next, the floor plate member 50F with the crack is removed from the beam members 10A-10D. The floor plate member 50F is arranged adjacent to the other floor plate members 50G1-50G6 in the planar direction (first direction and second direction). Therefore, if the butt surfaces of the adjacent floor plate members are unevenly formed as in the conventional floor structure (see FIG. 5A), it is difficult to remove only the floor plate member 50F to be replaced, and it becomes necessary to move the adjacent floor plate members 50G1-50G6. On the other hand, in this embodiment, since the butt surfaces of the floor plate member 50F and the adjacent floor plate members 50G1-50G6 are not unevenly formed (see FIG. 6A), it is possible to easily remove only the floor plate member 50F to be replaced.

After removing the floor plate member 50F from the beam members 10A-10D, a new floor plate member 50 is placed in place of the removed floor plate member 50F and attached to the beam members 10A-10D using the fastening members 60 and cover members 70. In this way, it is possible to easily replace only the floor plate member 50F to be replaced. In other words, the floor plate member 50F can be replaced without affecting the floor plate members 50G1-50G6 arranged adjacent to the floor plate member 50F, the beam members 10, and the support members 20. This makes it possible to greatly reduce the man-hours and costs required for the replacement work.

Figures 9A and 9B are diagrams explaining another example of a method for replacing a floor panel member 50. In Figures 9A and 9B, similar to the case of Figure 8, a floor panel member 50F is arranged to span four beam members 10A to 10D adjacent to each other in the second direction, and a crack (fissure) has occurred in the floor panel member 50F.

In the example of Figure 8, the entire floor panel member 50F to be replaced is replaced, but in the example of Figures 9A and 9B, only a part of the floor panel member 50F to be replaced is replaced. First, the location of the crack in the floor panel member 50F to be replaced is identified. In Figure 9A, the crack has occurred in the second direction at a position between the beam members 10B and 10C. In this case, only the area of the floor panel member 50F indicated by diagonal lines between the beam members 10B and 10C is replaced.

First, remove the four fastening members 60 (cover members 70) that fasten the floor plate member 50F to the beam members 10B and 10C. Next, cut the floor plate member 50F along the cutting lines Cr and Cl along the first direction. Then, remove the shaded area of the floor plate member 50F shown in FIG. 9A from the beam members 10B and 10C. Next, prepare a floor plate member 50F2 of the same size as the cut and removed part and attach it to the shaded area of FIG. 9B. Then, drill new screw holes 55 in the beam members 10B and 10C, and attach the floor plate member 50F2 using the fastening members 60 and cover members 70. At this time, the parts 50F1, 50F1 of the floor plate member 50F that were not removed are also fixed to the beam members 10B and 10C again using the fastening members 60 and cover members 70.

According to the method of Figures 9A and 9B, only the smallest section of the floor panel member 50F to be replaced can be replaced, which can further reduce the cost of replacement materials. For example, if the length of one floor panel member 50 in the second direction is about 4m, replacing the entire 4m floor panel member will increase the material cost of the floor panel member involved in the replacement. In contrast, if only the section between two joists 10, 10 adjacent to each other in the second direction (about 600mm) is replaced, it is possible to reduce the material cost of the floor panel member. In this way, the floor structure of this embodiment can improve maintainability compared to conventional floor structures.

===Other embodiments===
The above-mentioned embodiment is for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention, and the present invention also includes equivalents. In particular, the following embodiment is also included in the present invention.

<About the floor structure of the martial arts hall>
In the above embodiment, the floor structure of a kendo hall has been described as an example of a floor structure of a martial arts hall, but it is not limited to this and can be applied to martial arts halls such as aikido halls and karate halls. Also, although it has been described that the floor board members are suitable for sports where the members step on them barefoot, they can also be applied to sports where the members wear footwear such as shoes, or sports where tatami mats or mats are laid on the floor boards.

10. Rail member,
10b bottom surface, 10rs side surface, 10ls side surface,
20 Support member,
21 base part,
22 holding portion, 22b placing portion, 22s side wall portion,
50 Floor plate member,
51 concave portion (tongue), 52 convex portion (tongue),
55 screw hole (through hole),
60 Fastening member,
70 Cover member,
120 Floor beam (steel beam)

Claims (7)

A beam member having a rectangular prism shape extending along a first direction;
a plurality of support members provided at predetermined intervals in the first direction and supporting the beam members at a predetermined height above the floor foundation;
A plurality of floorboard members fixed to upper surfaces of at least two of the beam members in a state of being spanned between the beam members adjacent to each other in a second direction perpendicular to the first direction;
A floor structure for a martial arts hall equipped with:
The support member has a base portion for installation on the floor foundation and a retaining portion for retaining a lower surface and both side surfaces of the beam member, the base portion and the retaining portion being integrally formed by an elastic body,
A floor structure for a martial arts hall, wherein the abutting surfaces of the floorboard members adjacent to each other in the first direction and the second direction are both flat. The floor structure of a martial arts hall according to claim 1,
A martial arts hall floor structure, characterized in that each of the plurality of floorboard members is constructed from a single wooden board. The floor structure of a martial arts hall according to claim 1 or 2,
A martial arts hall floor structure characterized in that each of the plurality of floorboard members is fixed to the joist members using fastening members that penetrate the floorboard members in the thickness direction. The floor structure of a martial arts hall according to claim 3,
A cover member for covering an upper end of the fastening member is provided.
A floor structure for a martial arts hall, characterized in that the through holes penetrating the floorboard members are blocked by the cover members. The floor structure of a martial arts hall according to claim 1 or 2,
A floor structure for a martial arts hall, wherein the surface of the floorboard members is thinly scraped off and no liquid agent is applied thereto. The floor structure of a martial arts hall according to claim 1 or 2,
The retaining portion has a pair of side walls that sandwich one side surface and the other side surface of the beam member in the second direction,
A floor structure for a martial arts hall, wherein the distance in the second direction at the upper ends of the pair of side wall portions is narrower than the distance in the second direction at the lower ends of the pair of side wall portions. a support member attachment step of attaching a support member to the beam member;
a support member installation process of installing the support member attached to the beam member on a floor foundation;
a floor board member attachment step of attaching a floor board member to the beam member;
A method for constructing a floor for a martial arts hall, comprising:
The support member has a base portion for installation on the floor foundation and a retaining portion for retaining a lower surface and both side surfaces of the beam member, the base portion and the retaining portion being integrally formed by an elastic body,
A martial arts hall floor construction method, characterized in that the butt surfaces of the floorboard members adjacent in the planar direction are all flat.

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