JPH0143110B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor system for indoor sports halls, in particular for judo halls where large impact loads are applied.

In general, floor equipment for indoor gymnasiums is required to have a buffering effect to soften the impact received from the floor when landing during strenuous exercise movements, a repulsion effect to provide appropriate momentum to the exercise movement, and a vibration damping effect. However, especially in judo halls, when a competitor is thrown, an extremely large impact force (approximately 1,500 kg) is applied, so the impact effect, or softness, is of paramount importance. As a result, whereas previously judo tatami mats were laid directly on wooden floors or with anti-vibration rubber interposed, judo halls built in recent years are now using subflooring materials that use metal coil springs. are becoming more common. However, by adopting the metal coil spring, a soft floor device with excellent buffering effect could be obtained, but with the metal spring, the vibration damping characteristics and the restoring characteristics of the floor were poor, and it was difficult to perform continuous techniques. This interferes with other movements, and especially when used by an expert, the judo field becomes very difficult to compete in, and there is a risk of accidents such as sprains.

Therefore, the present invention is constructed by arranging a large number of flooring materials having cushioning rubber and flooring materials having metal coil springs separated by a predetermined interval, and placing and fixing the large tension material by these flooring materials, The object of the present invention is to provide a soft floor device with excellent shock-absorbing properties, excellent vibration damping characteristics and restoring characteristics, and an easy-to-play floor device.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a concrete foundation in a floor system F of a judo hall, and on the foundation 1 are installed alternately floor sub-materials 2 having cushioning rubber and sub-floor materials 3 having metal coil springs. The flooring material 2 having cushioning rubber has a bottom member 5 fixed on the foundation 1 by an anchor or a driving pin, and a female thread is formed on the upper surface of the bundle member 5, and a female thread is formed on the upper surface of the bundle member 5. The adjustment bolt 6 is screwed together,
And it is fixed at an appropriate height position by a lock nut 7. Further, a buffer rubber (bound rubber) 9 having a metal plate 9a baked and fixed to the bottom surface of the adjustment bolt 6 is fitted, and the buffer rubber 9 is adjusted and fixed in an appropriate position by lock nuts 10, 10. has been done. A large tension member 11 made of a bent steel plate with a cross-sectional shape is placed on the buffer rubber 9, and a rebound rubber 12 is connected to an adjustment bolt 6 that passes through the large tension member 11 and extends upward. The nut 13 is then tightened to hold and secure it.

On the other hand, the flooring material 3 having a metal coil spring has a bundle member 15, and a metal coil spring 16 made of a double coil is placed and fixed on the upper surface of the bundle member 15. The spring 16
On the top is a support plate 17 with a burring hole in the center.
is fixed, and a nut 19 having a collar is placed on the support plate 17. Further, an adjustment bolt 20 is screwed into the nut 19 so that the height can be adjusted freely, and a support plate 21 having a U-shaped cross section is fixed to the upper end of the bolt 20. The material 11 is placed and fixed with bolts 22.

Joists 23 made of bent steel plates with a cross-section of a hat are placed on the large lumber 11 at predetermined intervals through rubber plates in a direction perpendicular to the lumber 11, and fixed with screws. has been done. Furthermore,
On the joists 23, there is a veneer 25 that forms the flooring material.
is fixed with screws, and a judo mat 26 is laid on the plywood 25.

In addition, Fig. 2 is a layout diagram of the subfloor materials 2 and 3, the large tension material 11, and the joist material 23. Regarding the large material 11, the subfloor material 2 with cushioning rubber (see black circle) and the metal coil spring are arranged. In addition, in the direction orthogonal to the main tension material 11, the subfloor materials 2 having cushioning rubber and the subfloor materials 3 having metal coil springs are arranged alternately. It is located.

Since the present embodiment has the above-described configuration, when a competitor is thrown at a judo hall, a large impact force acts on a predetermined portion of the tatami mat 26, for example, the portion indicated by arrow X. Then, the impact force is transmitted to the lumber 11 via the veneer 25 and the joist 23, and further dispersed by the lumber 11 and transmitted to the subfloor materials 2 and 3. Then, the cushioning rubber 9 and the metal coil spring 16 in the flooring materials 2 and 3
Although the impact force is absorbed by the ball, the large tension member 11 bends with a predetermined elasticity and softly supports the thrown athlete due to the large impact absorption ability of the metal coil spring 16 in particular. At the same time, due to the large repulsive force of the metal coil spring 16, a force that causes the large tension member 11 to vibrate is applied, but the buffer rubber 9, which has a large damping characteristic,
The vibration of the large tension material 11 is attenuated and restored, and the floor will not vibrate for a long time. In addition, when the athlete performs other movements other than when being thrown, such as suriashi, throwing, and ground-waza, the impact force as large as when the athlete is thrown does not act, so the cushioning rubber 9 also has enough impact force. is absorbed by the metal coil spring 16
The amount of displacement is also small, so the vibration of the large tension member 11 is immediately damped, and it functions as a relatively hard floor.
Even experienced users will have no trouble performing these movements. Furthermore, even if the contestant is thrown near the flooring material 2 with cushioning rubber or the flooring material 3 with metal coil springs, as shown by arrows Y or Z, the impact force will be applied to the tatami mat 26, the veneer veneer, etc. 25
Since it is relatively dispersed and acts on the large tension lumber 11 via the floor joists 23, the ratio of acting on both the floor base materials 2 and 3 is not constant, but it acts in a dispersed manner on both the floor base materials 2 and 3. , performs substantially the same operation as described above.

Next, experimental results regarding the floor device according to the present invention will be explained.

First, the buffer effect measuring device used in this experiment will be explained. The measuring device 30 has a support 31, and a guide pipe 32 extends vertically from the support 31. Furthermore, the guide pipe 32
A weight 33 and a magnet 35 are slidably guided therein, and the magnet 35 is connected by a rope 36 to a hoist 37 installed on a support base 31. Further, a load plate 37 is disposed on the guide pipe 32 in contact with the floor device F, and a load converter 39 is placed on the load plate 37 via a spherical seat, and a predetermined length of the load converter 39 is placed on the load plate 37 via a ball seat. A rubber spring 40 is placed thereon.

Then, with the support stand 31 installed at predetermined measurement points A to E on the floor device F, when the excitation of the magnet 35 set at a predetermined height by the hoist 37 is released, the predetermined weight that was attracted to the magnet 35 is removed. The weight 33 falls along the guide pipe 32 and applies a predetermined load to the floor device F via the rubber spring 40, the load converter 39, and the load plate 37. The displacement of the floor in the vertical direction at that time is captured by an optical displacement meter, and is recorded by an electromagnetic oscillograph in synchronization with the load detected by the load converter 39.

By the way, from the actual usability of many actual floors and actual measurements based on the above-mentioned measuring device 30, in general, the floor load/time obtained from the deformation/time curve and the load/time curve obtained by the measuring device 30 is In the deformation curve, the deformation energy UF until the deformation reaches the maximum is calculated, and a result has been obtained that it is desirable that the deformation energy UF is within the range shown in FIG.

Therefore, measurements were taken using the measuring device 30 described above at measurement points A to E in FIG. 2 with and without tatami mats, and the results shown in FIG. 5 were obtained. In addition, the interval between the large tension materials 11 is 900 [mm],
Spacing between joists 23: 300, spacing between flooring materials 2 and 3
It is 1200. As a result of the above, it was found that all points are within the desirable range for a floor for a judo hall as mentioned above, and especially in normal usage conditions with tatami mats laid out, this is the best range for a floor for beginners. I understand.

On the other hand, if the deformation/time curve is shown at a representative point B, the state without tatami mats is shown in FIG. 6, and the state with tatami mats is shown in FIG. 7. Note that the curves at other measurement points A, C to E are also approximately the same as the curves at point B, and therefore will be omitted.

FIG. 8 shows the metal coil spring 16.
7 is a diagram showing the deformation/time curve of a floor device supported only by the subfloor material 2 according to the present invention. Compared to this floor device, the floor device F according to the present invention shown in FIGS. It can be seen that the damping characteristics are significantly superior.

In the above-mentioned embodiment, the flooring material 2 having the cushioning rubber 9 and the flooring material 3 having the metal coil spring 16 were installed alternately with respect to the large tension material 11, but two of the flooring material 3 having the spring 16 The combination may be changed as necessary, such as by providing one subflooring material 2 with cushioning rubber 9 for the floor, and judo mats may be laid instead of tatami mats. Of course, the present invention can also be applied to other indoor sports halls such as kendo halls.

As explained above, according to the present invention, the large tension material 11 is placed and fixed by the floor sub-material 2 having the cushioning rubber 9 and the sub-floor material 3 having the metal coil spring 16, so that the impact force can be sufficiently absorbed. The floor device F is a soft floor device F that can provide cushioning, and can significantly reduce injuries to athletes, while also having excellent vibration damping characteristics and restoring characteristics of the floor, making it easy to play in competitions. In particular, when applied to a judo hall, an extremely large impact force is applied to the floor device F when a player is thrown, but the floor device F can sufficiently absorb the large impact force and support the player softly. , suriashi, throw, and ground moves, as well as their continuous moves, the vibration of the floor device F is immediately damped and restored, functioning as a relatively hard floor, and even an expert can perform these movements quickly and without any trouble. This makes it a very easy-to-play floor device.

[Brief explanation of drawings]

Fig. 1 is a side view showing the flooring device for a judo hall according to the present invention, Fig. 2 is a plan view showing the arrangement of the subfloor material, large tension material, and joists, and Fig. 3 is a measurement of the cushioning effect of the flooring device. A front view showing the measuring device, FIG. 4 is a table showing desirable deformation energy from the perspective of collision effect, FIG. 5 is a table showing deformation energy at each measurement point of the floor device according to the present invention, and FIGS. 6 and 7. is measurement point B
FIG. 8 is a diagram showing a deformation/time curve in a floor device supported only by a subfloor material having metal coil springs. 1... Foundation, 2... Floor base material, 3... Floor base material, 9... Cushioning rubber, 11... Large tension material, 16...
Metal coil spring, 23...joist material, 25,
26...floor material, F...floor equipment.

Claims (1)

[Claims] 1. Place the Ohiki material on the subfloor material fixed to the foundation.
In a flooring device for an indoor sports field, in which a flooring material is placed and fixed on the large tension material via a joist, each of the subflooring materials has a buffer rubber constituting a separate subflooring material. It consists of a subfloor material and a subfloor material having a metal coil spring, and a large number of the subfloor material having cushioning rubber and the subfloor material having a metal coil spring are arranged separated by a predetermined distance, and the large tension material is A floor device for an indoor playground characterized by being supported by a subfloor material.