JP2547361B2 - Replaceable natural grass structure for stadiums with artificial grass - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is particularly temporary because the multipurpose halls, covered stadiums, and arena spaces such as gymnasiums, which have recently become popular, are used for multiple purposes such as indoor sports, ceremonies, gatherings, and exhibitions. TECHNICAL FIELD The present invention relates to a replaceable natural turfing structure for an athletic field having artificial turf, which is carried out according to the purpose of general natural turfing.

[0002]

2. Description of the Related Art Conventionally, the floor surface of an arena space is often covered with a board, but artificial turf is also widely used. This is because it has been considered that natural turf cannot be used for indoor arenas at all because it is difficult to maintain the conditions for growing environment such as lighting, temperature and humidity.

[0003]

In recent years, many holes having artificial grass arenas with large spans have been constructed due to the progress of construction technology. On the other hand, with the birth of a professional soccer team soon after, there is a strong demand to be able to play soccer, tennis, rugby, and other sports indoors, but official sports such as soccer, tennis, and rugby are natural. There is a rule that what should be done on the grass, and there is an urgent need to realize the natural grass of the stadium with artificial grass (artificial grass arena). On the other hand, the arena space such as the multi-purpose hall is also widely used for various events, and it is also a mission to improve operational efficiency, so in the end it is possible to temporarily replace the natural turf of the stadium with artificial turf. It should be realized by structure, and this is a problem to be solved.

[0004]

As a means for solving the above-mentioned problems of the prior art, a replaceable natural turf structure of a stadium having an artificial turf according to the present invention is shown in the drawings as an embodiment. As you can see, the floor 2 of the artificial turf stadium 1
A relaxing material 3 such as a rubber sheet is laid on the draining groove 4 and a natural turf package 5 modularized in plan shape and size is spread on the relaxing material 3. The natural turf package 5 is formed by filling a relatively shallow box-shaped container 7 having a drainage hole 6 on the bottom surface with a soil 8 and planting natural grass 9 on the surface of the soil 8. . In particular, the upper part of the peripheral side wall 7a of the container 7 is made of rubber from a position slightly deeper than the biting depth of the spike 11a from the surface of the soil 8 to a position slightly lower than the height of the natural grass 9. Or shock absorber 10 made of plastic material
It is characterized by being formed by. The present invention also provides
The natural grass package 5 is also characterized in that the soil 8 filled in the container 7 is rich soil containing natural or artificial lightweight sand and fertilizer.

[0005]

The natural grass on the floor surface 2 of the artificial grass stadium 1 is achieved by laying the natural grass package 5 manually or by using a forklift or the like. Since the weight per 1 m ^{3 of} soil is usually about 1.7 tons, if the size of one natural turf package 5 is, for example, about 2 m × 4 m, the man-hours for laying work will be reduced and the weight of the soil will be reduced. As a result, the stability of the natural turf package 5 is enhanced, and even if a fierce competition such as soccer, rugby, or tennis is played on it, there is no problem.

The planted state of the natural grass 9 and the filled state of the soil 8 are kept stable by restraining the container 7. The impact absorbing material 10 forming the upper part of the peripheral side wall 7a of the container 7 does not give the player's spikes 11a or the like a foreign substance feeling, and there is no fear of falling or injury. By removing the natural turf package 5 after use, the floor surface 2 of the artificial turf stadium 1 is restored to the original artificial turf surface (or board surface) and immediately usable for other events. The removed natural grass package 5 is
You can place grass in a vacant lot to grow and cure grass.

[0007]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIG. 1 illustrates a field line 12 for soccer competition and a reserve range 13 around the field line 12 as a range to be natural turf when the arena space of the multipurpose hall is a stadium 1 having artificial turf.

FIG. 2 shows a bird's-eye view of a state in which a large number of natural grass packages 5 are laid as a basic structure of making a stadium 1 having artificial turf natural grass. FIG. 3 shows details of the relational structure between the floor surface 2 of the artificial turf stadium 1 and the natural turf package 5 laid thereon. The natural turf package 5 shown in FIG. 2 has a rectangular planar shape with a size of about 2 m × 4 m, which is exactly laid on the floor surface 2 in a regular array.

As is apparent from FIG. 3, the natural turf package 5 includes a modified natural or artificial lightweight sand and fertilizer in a relatively shallow box-shaped container 7 made of metal such as steel or reinforced plastic. It is a structure in which the soil 8 having a mineral content including a portion is filled, and the natural grass 9 is planted on the surface of the soil 8. The container 7 is sufficiently reinforced with angles 7b, ribs 7c and the like. A drainage hole 6 is provided on the bottom surface. Although not shown in the drawings, a hook is attached to a side surface of the container 7 and a pulley is built in the bottom surface of the container 7 in order to carry it in and out. In particular, the upper part of the peripheral side wall 7a of the container 7 is a few cm deeper than the biting depth of the spike 11a of the soccer shoe 11 from the surface of the filled soil 8, and the natural grass 9 on the soil surface is the cause of the damage. 1-2 than height
The part up to a position about cm lower is formed by a shock absorbing material 10 made of a soft material such as rubber or plastic, and restrains the soil 8 and the natural grass 9 but does not cause the spike 11a to be caught or to give a foreign object feeling. It is configured. The most important thing for artificial turf competition is that the abutting portions of the natural turf packages do not cause any obstacle even if the ball is kicked or stepped on from above, and the above-described impact absorbing material 10 realizes the condition.

The natural grass package 5 having the above structure is laid on the floor surface 2 by several people or by using a forklift or the like. At this time, a cushioning material 3 such as a rubber sheet is laid in advance on the floor surface 2 so as to leave a gap to serve as a drainage groove 4, and a container 7 of a natural grass package 5 is laid on it. Has been. A relaxing material 14 having a thickness of several mm is also sandwiched between the side walls of the containers 7 of the adjacent natural grass packages 5 to prevent rattling.
In this way, the structure of natural grass is constructed such that the height from the floor surface 2 to the surface of the soil 8 of the natural grass package 5 is about 10 cm.

After use, the indoor stadium 1 is restored to the original state of the floor surface 2 (artificial grass) by removing the natural grass package 5.

[0012]

According to the replaceable natural turf structure of the stadium having the artificial turf according to the present invention, the artificial turf stadium (arena space) such as a multipurpose hall is relatively used for temporary use. Natural turf can be easily converted, and official competitions such as soccer, rugby, and tennis can be held indoors, further expanding the use of the multipurpose hall.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of converting an artificial grass stadium into natural grass.

FIG. 2 is a perspective view showing a laying state of a natural grass package.

FIG. 3 is a cross-sectional view of a natural turfed structure.

[Explanation of symbols]

 1 Artificial grass stadium 2 Floor surface 3 Relaxation material 4 Drainage groove 5 Natural grass package 6 Drainage hole 7 Container 7a Peripheral side wall 8 Soil 9 Natural grass 10 Impact absorbing material

Claims (2)

(57) [Claims] 1. A relaxation material such as a rubber sheet is laid on the floor surface of a stadium having artificial turf, leaving a drainage groove, and a planar shape and a size are modularized on the relaxation material. The natural turf package is spread, and the natural turf package is filled with soil in a relatively shallow box-shaped container having a drainage hole in the bottom surface, etc., and natural grass is planted on the surface of the soil. In particular, the upper part of the peripheral side wall of the container is a rubber or plastic portion from a position slightly deeper than the biting depth of spikes or the like from the surface of the soil to a position slightly lower than the height of the natural grass. A replaceable natural turf structure for stadiums that has artificial turf, characterized by being formed of a shock absorber made of a base material. 2. The artificial turf according to claim 1, characterized in that in the natural turf package, the soil filled in the container is rich soil containing natural or artificial lightweight sand and fertilizer. Replaceable natural turf structure for stadiums.