JPH0140166B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface structure of a stadium using artificial turf.

In recent years, artificial turf has become popular in many facilities, especially stadiums, due to its ease of management and aesthetic appearance. However, if sandy parts of the field remain in some areas, such as near each base in a baseball field, the ball bounces irregularly at the boundary between the artificial turf and the sandy part, which can interfere with play. It was hoped that this could be improved, but no good solution could be found.

The present invention was developed in view of the above-mentioned circumstances, and by providing a transition section at the boundary between the artificial turf and the sandy soil area, the present invention prevents the ball from changing suddenly and bouncing, thereby improving play. The objective is to provide a surface structure for stadiums using artificial turf that ensures safety.

In the present invention, artificial turf is stretched over a part of the ground surface of a stadium, leaving a sandy soil area, and the part of the artificial turf that borders the sandy soil area gradually enters into the sandy soil. This structure forms a transition section having a slope of .

The embodiment of the present invention shown in FIG. 2 will be described below in comparison with the conventional example shown in FIG. Note that common parts in both figures are given the same reference numerals.

FIG. 1 clearly shows a conventional artificial turf installation structure, especially near the boundary with the sandy soil area.
To explain this artificial turf installation structure along with its construction method, the ground ground 6
A crushed stone layer 4 is placed on top to improve water drainage, then an asphalt concrete layer 3 made of a mixture of asphalt and concrete is hardened for the area A where the artificial turf 1 is to be laid, and then a cushion material 2 is laid down. Artificial grass 1 is stretched over it. On the other hand, in the sandy soil area B where no artificial turf is to be stretched, sandy soil is deposited on the crushed stone layer 4 until it reaches the same level as the artificial turf 1 (FIG. 5, part 5). Therefore, the structure of the artificial turf area A and the sandy soil area B changes rapidly at the boundary between the two, causing the ball to bounce irregularly.

On the other hand, in the embodiment of the present invention shown in FIG.
has been established. Note that the structures of the artificial turf area A and the sandy soil area B are the same as those of the above-mentioned conventional example, so their explanations will be omitted.

In the transition area C, an appropriate area of artificial turf 1' is placed at the boundary between the horizontal area A of the artificial turf and the sand area C.
It is installed at a slope so that it gradually penetrates into the sandy soil. In order to give the above-mentioned slope to the artificial turf 1', the asphalt concrete layer 3' is hardened so that its upper surface is inclined, and a cushion material 2' is stretched on the upper surface to form the foundation for the artificial turf 1'. It is part S. As can be seen in detail in FIG. 3, in the transition area C, sand 5' is inserted between each grass piece 11' of the artificial turf 1', and the amount of sand is:
It gradually increases from the side closer to the area A of the artificial turf described above, and on the side closer to the sandy soil area B, the tips of the grass pieces 11' are hidden in the sandy soil.

If such a transition area is provided, the ground conditions will not change suddenly, eliminating irregular bounces of the ball, and preventing players from getting caught in gaps in the artificial turf and falling over. Safety can be ensured.

In addition, in a stadium with a sandy soil section 5 as described above,
When hosting other types of competitions, the entire stadium is often used as artificial turf by replacing the sandy soil area with artificial turf with a foundation that has the same structure as the surrounding artificial turf area. In such a case, in the present invention, as shown in FIG.
By making it possible to take out the artificial turf 1' stretched on the foundation part S consisting of asphalt concrete 3' and cushion 2' in the transition part C as one block, the entire surface can be covered as in the case of conventional stadiums. It will be possible to convert it to an artificial turf stadium.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional artificial turf covering structure for a stadium, Fig. 2 is a sectional view of an artificial turf covering structure of an embodiment of the present invention, and Fig. 3 is a vicinity of the transition part C shown in Fig. 2. FIG. 1,1'...Artificial grass, 5,5'...Sand, B...
Sand area, C... Transition area, S... Foundation area.

Claims (1)

[Scope of Claims] 1. Artificial turf is laid on the ground surface of the stadium, leaving a sandy soil area in a part of the ground surface, and the part of the artificial turf that borders the sandy soil area gradually becomes sandy and soily. A surface structure of a stadium using artificial turf that forms a transition section with a slope that extends into the field. 2. The surface structure of a stadium using artificial turf according to claim 1, wherein the artificial turf in the transition area is removable together with its foundation.