JPH0742110A - How to construct an artificial grass ground with sand - Google Patents

Abstract

PURPOSE:To prevent the artificial turf characteristic such as the bounding height of a tennis ball and hardness from being changed with the passage of time by scattering sand on the installed artificial turf, then compacting the artificial turf with a vibrating roller. CONSTITUTION:Artificial turf is installed on a foundation layer made of asphalt or cement directly or via a cushion layer. Polypropylene split yarns having the total denier of 10000D are planted on a polypropylene ground fabric, for example, to form turf leaves for use as artificial turf. Sand is scattered on the artificial turf. The sand having the grain size of 2mm or below is scattered at the rate of 34Kg per 1m<2> with a sand spreader, for example. The artificial turf is compacted with a vibrating roller. A stable artificial turf characteristic can be obtained from the initial stage of execution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a sand-containing artificial lawn ground.

[0002]

2. Description of the Related Art Conventionally, artificial grass made of sand containing grass has been known. This sandy artificial grass ground is
It is formed by laying an artificial lawn directly on the foundation layer such as asphalt or cement or through a cushion layer, and then filling the artificial lawn with a brush to which sand is applied while pressing sand (for example, Japanese Examined Sho 63-
53324).

[0003]

By the way, in the sand-made artificial grass turf ground thus formed, it is not sufficiently compacted, and then it is gradually compacted by the use of the athlete and the precipitation. It solidified. Therefore, when this sand-filled artificial lawn ground is used as a tennis court, the bounce of the ball is low at the beginning of construction, but after a certain period of time the bounce becomes high and the characteristics of slice and spin change. There was a problem.

The present invention has been made in view of the above problems, and provides a method of constructing a sand-filled artificial lawn ground that can be compacted in the same condition as when a certain period has elapsed from the beginning of construction. is there.

[0005]

The present invention is characterized by spraying sand on a laid artificial grass and then compacting it with a vibrating roller.

[0006]

After the artificial lawn is laid on the foundation layer directly or via the cushion layer, sand is sprinkled on the artificial lawn and further compacted by the vibrating roller.

As a result, it can be compacted in a state equivalent to that of a sand-filled artificial lawn ground after a certain time has passed from the beginning of construction. When the sand-containing artificial lawn ground is used as a tennis court, the ball's bound becomes constant from the beginning of construction, and playability can be improved.

[0008]

EXAMPLES Specific examples of construction of the present invention will be described below.

First, as the artificial lawn, there was used one in which a polypropylene woven cloth with polypropylene fibers having a total denier of 10000 D and having a pile length of 25 mm was planted to form turf leaves. Then, sand having a particle diameter of 2 mm or less was sprayed onto the artificial lawn at a rate of 34 kg per square meter by using a sand spreader. After this, 0.6
t Vibration roller (Model BW6 manufactured by Nippon Bomak Co., Ltd.
0HD) was used to form a sand-containing artificial lawn ground (Working Example 1).

After being pressed twice by this vibrating roller, the tennis ball was dropped from a height of 200 cm above the ground and the bound height was measured to be 103 cm. Below, 4
Bound heights at rotational pressure, 6 rotational pressure and 10 rotational pressure were measured to be 107 cm, 110 cm and 1 respectively.
It was 08 cm. The hardness was 50 to 60 when measured with a rubber / plastic hardness meter (Asker CS type hardness meter) manufactured by Kobunshi Keiki Co., Ltd.

The rainfall intensity after construction (30-40 mm /
H, 2 hours), the bound height was 98 cm, which was about 10 cm lower.

In construction example 2, sand is sprinkled on an artificial lawn laid in the same manner as construction example 1, and then a 1.2t vibrating roller (Dynapack LA75 manufactured by Sakai Heavy Industries Ltd.) is used to compact the sand. An artificial lawn ground was formed.

After being pressured twice by this vibrating roller,
Similarly, when the bounce height of a tennis ball is measured, it is 10
It was 0 cm. After that, even when the bounce height was measured during 10 rotations of pressure, the value was the same as that of the case of 2 rotations of pressure. In addition, the hardness is 35 to 50, and the artificial grass has an elongation of about 1%.

Further, in the construction example 3, as described above, 20 liters of water per 1 square meter was sprayed after spraying sand on the artificial lawn, and then 0.6t used in the construction example 1 Rolled with a vibrating roller to form an artificial grass ground containing sand. Then, after the water was dried, the bound height and hardness were measured.

In this construction example, the bouncing heights of the tennis ball at 2 rotation pressures, 4 rotation pressures, 6 rotation pressures and 10 rotation pressures were 99 cm, 99 cm, 99 cm and 103 cm, respectively. The hardness was 40 to 60.

The rainfall intensity after construction (30 to 40 mm /
H, 2 hours), the bounce height remained at 103 cm and no reduction in height was observed.

Next, in order to compare with these construction examples, the bound height and hardness of the tennis ball were measured on the sand-containing artificial lawn ground formed by the conventional construction method.

In Comparative Example 1, the same amount of sand was sprayed on the artificial grass described above, and the sand was artificially rubbed and filled with a brush to which a pressing force was applied to form an artificial grass grass ground. .

The bounding height of the tennis ball on the sand-made artificial lawn ground was 97 cm, and the hardness thereof was 35 to 45.

The rainfall intensity after construction (30-40 mm /
H, 2 hours), the bound height was 87 cm, which was 10 cm lower.

In Comparative Example 2, the same amount of sand was sprinkled on the artificial grass as described above, and the artificial grass containing sand was compacted by using a 4.5t roller (Grand roller GR45 manufactured by Sakai Heavy Industries Ltd.). Formed ground.

After rolling by the roller, the bounce height of the tennis ball was measured, and the numerical value was the same as that of Comparative Example 1 up to four rotations of pressure. Furthermore, the bounce height at 6 revolutions pressure dropped to 88 cm. Hardness is 30-50
Met.

Further, in Comparative Example 3, as in the case described above, 0.1 t after the artificial grass was sprinkled with sand.
Vibration was applied for about 10 seconds using a vibration plate and pressure was applied to form a sand-containing artificial grass ground.

The bound height in this case was 73 cm. The hardness was 10 to 30.

From the above, when sand is sprinkled on the artificial lawn and water is sprayed and then compacted by a roller with vibration, loosening due to rainfall is small, and a certain amount of years have passed since the beginning of construction. It becomes possible to play the same as, and is more effective.

[0026]

As described above, according to the present invention, after the sand is sprayed on the artificial lawn, the artificial lawn made of sand is compacted by the vibrating roller to form a sand-made artificial lawn ground. It is possible to provide the same characteristics as the sand-made artificial grass ground that has passed. When the sand-containing artificial grass ground is used as a tennis court, the bouncing of the ball is constant from the beginning of construction, and the playability can be improved.

Claims (1)

[Claims] 1. After spraying sand on a laid artificial grass,
A method of constructing an artificial grass lawn made of sand, characterized by compaction with a vibrating roller.