JPH0369705A - Ground made of artificial lawn - Google Patents

Abstract

PURPOSE:To ensure enough elasticity by a method wherein a netform body in which three-dimensional voids are formed is located between a foundation material and a surface material, the three-dimensional void is filled with a resilient granular material to form a reinforcing layer. CONSTITUTION:A netform body 3 in which approximately regularly continuous three-dimensional voids are formed by interlacing resin filaments is placed on a foundation material 1. The voids of the netform body 3 are filled with resilient granular material 4 to form a reinforcing layer 2. An artificial lawn 5 is laid over the reinforcing layer 2 and sand 6 is strewed in lawn leaves 5b of the artificial lawn 5 to form a surface material 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an artificial grass field constructed for various athletic facilities such as tennis courts and soccer fields.

(Prior Art) In general, the base of artificial grass is formed by encasing bituminous material, concrete, or a mixture of concrete. As a result of accelerating the progress of compaction, there is a problem in that water permeability deteriorates, and at the same time, the blades of artificial lawns wear out more quickly, reducing the buffering effect.

(Problem to be solved by the invention) For this reason, there is a method of interposing an under bat on the underside of the artificial grass, but the elasticity of this amber bat puts a strain on the muscles and makes them easily fatigued. If it is weakened, it has the disadvantage of making it hard to hold on and making it difficult to walk.

Furthermore, as shown in Japanese Patent Application Laid-Open No. 60-98002, there is a proposal to use an elastic mat made of loofah fibers filled with sand in place of the underbutt, but since the elasticity is inferior to the underbat, As mentioned earlier, the problem of not being able to maintain momentum has not been resolved.

The present invention has been made in view of these problems, and aims to provide an artificial grass ground that has excellent water permeability while ensuring sufficient elasticity.

(Means for Solving the Problems) The present invention provides resin filaments between a flat base material and an artificial lawn and a surface material formed by sand sprinkled within the grass leaves of the artificial lawn. A reinforcing layer is formed by interposing a net-like body in which three-dimensional voids are intertwined and substantially regularly continuous, and the three-dimensional voids of the net-like body are filled with at least elastic particles. It is.

(Operation) A net-like body in which resin filaments are intertwined to form substantially regularly continuous three-dimensional voids is developed on a substantially flat base material. The three-dimensional voids formed in this net-like body are filled with at least elastic particles to form a reinforcing layer.

Further, on top of this reinforcing layer, artificial grass is laid as a surface layer material, and sand is sprinkled into the grass leaves to create a ground.

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

FIG. 1 shows a first embodiment of an artificial grass ground according to the present invention. In this embodiment, the foundation material 1 serving as the base for the artificial lawn 5 described later is made of soil with a substantially flat top surface covered with crushed stones or asphalt, and is made of asphalt that overflows against rainfall. A material with sufficient water permeability to prevent the formation of water is used.

A reinforcing layer 2 is then laid on top of the base material 1. This reinforcing layer 2 is composed of a net-like body 3 in which substantially regularly continuous three-dimensional voids are formed, and elastic particles 4 such as gobs and grains filled in this net-like body 3. The above-mentioned reticular body 3 is
A resin filament with a thickness of about 0.1 m to 3 m,
Drop it while shaking it on the belt before solidifying it sufficiently,
The resin is entangled by heat fusion to form approximately regularly continuous three-dimensional voids, and the resin is as follows:
Typically, an olefin homopolymer or copolymer soft vinyl chloride is used.

The three-dimensional voids formed in the net-like body 3 are filled with elastic particles 4. Although the elastic particles 4 are not completely restrained as if they were glued, they are restrained to some extent by the net-like body 3. Therefore, even if the gland is used vigorously over a long period of time, the elastic particles 4 will not be unevenly distributed and elasticity unevenness will not occur in the reinforcing layer 2. This elastic granule 4
In addition to rubber particles, particles made of organic substances such as olefin, soft polyvinyl, styrene, and urethane can also be used.

Once the reinforcing layer 2 is laid down in this manner, an artificial lawn 5 is laid on top of it, and sand 6 is spread within the grass leaves 5b of the artificial lawn 5 to form the surface material 7.

In addition, in order to prevent the reinforcing layer 2 from mixing with the base material l, a barrier layer 10 (see FIG. 2 showing the second embodiment) is provided by laminating a high-density nonwoven fabric or the like to the lower part of the reinforcing layer 2. You may.

Furthermore, as the structure of the reinforcement N2, sand grains, rubber chips, or the like having a diameter smaller than that of the elastic particles 4 can be added as an extender.

Next, FIG. 2 shows a second embodiment of the present invention. In this embodiment, a sand layer 8 is formed in order to allow water to escape separately when the base material 1 does not have sufficient water permeability against rainfall.

If this sand layer 8 is left on the foundation material 1, it will be mixed into the foundation material l as time passes and the water permeability of the sand layer 8 will be reduced. 9 to prevent mixing with the sand layer 8.

The above-mentioned reinforcing layer 2 is laid on top of the sand layer 8. As in the first embodiment, this reinforcing layer 2 is composed of a net-like body 3 and elastic particles 4 that fill at least the three-dimensional voids of this net-like body 3, and a detailed explanation thereof will be omitted.

Furthermore, in order to prevent the sand layer 8 spread over the base material 1 from getting mixed into the reinforcing layer 2, a barrier layer 10 is provided by laminating a high-density nonwoven fabric or the like to the lower part of the reinforcing layer 2.

To give a specific example, the artificial lawn 5 constituting the surface layer material 7 is made of a polypropylene base fabric 5a with a single yarn of 400 D.

Nylon monofilaments with a total denier of 9600D are flocked to a pile length of 25 fl to form grass leaves 5b, and then coated with synthetic rubber to prevent the flocked grass leaves 5a from falling off.

The net-like body 3 constituting the reinforcing layer 2 is made by extruding high-density polyethylene with a diameter of 1 using an extruder, shaking it off onto a heald while it is hot, and fusing parts of it to each other.
It has three-dimensional voids that intertwine and continue approximately regularly, and has a thickness of 1
011. When providing the barrier layer 10 on this net-like body 3, a nonwoven fabric made of polypropylene is used. Reticular body 3
As the elastic particles 4 filled in, rubber particles having a maximum diameter of 10w or less are used.

In construction, first, the foundation material 1, such as a soil surface, is sufficiently rolled with rollers and compacted to form a flat surface. Next, after spreading a nonwoven fabric 9 on top of it, a sand layer 8 with a thickness of 100 mm is formed.
is formed, and the net-like body 3 is developed thereon. The space formed by this net-like body 3 is filled with rubber particles 4, and compacted and flattened by rowing again.

After laying the artificial grass 5 on the reinforcing layer 2, a sand spreader spreads 30 kg/n between the grass leaves 5b. Add 6 sand + l at the rate of
& Cloth.

The finished product was flat, with no uneven areas or ruts from the sand spreader. The coefficient of restitution when the Sasoka ball was dropped was 0.5, which was lower than other balls.

(Effects of the Invention) As described above, in the present invention, a net-like body is inserted between the base material and the artificial lawn, and the three-dimensional voids formed in this net-like body are filled with at least elastic particles. By forming the reinforcing layer, it is possible to ensure sufficient elasticity, making it difficult for compaction of sand to occur, and maintaining water permeability and buffering effects over a long period of time.

[Brief explanation of drawings]

The drawings illustrate the artificial grass field of the present invention.
FIG. 1 is a sectional view showing the first embodiment, FIG. 2 is a sectional view showing the second embodiment, and FIG. 3 is an exploded perspective view of FIG. 1... Foundation material 2... Reinforcement layer 3... Net-like body 5... Artificial lawn 4... Elastic granules 7... Surface layer material 1st

Claims (1)

[Claims] 1) Resin filaments are interlaced between the flat base material and the surface material formed by the artificial lawn and the sand sprinkled within the artificial lawn's turf leaves to create a three-dimensional structure that is approximately regularly continuous. A ground made of artificial turf, characterized in that a net-like body having voids formed therein is inserted, and the three-dimensional voids of the net-like body are filled with at least elastic particles to form a reinforcing layer.