JPH074504U - Artificial grass - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a practical sand-containing artificial grass that has a simple structure and does not become hard even after a long period of time. [Structure] In artificial turf in which turf members are planted on the surface of a sheet-like substrate, elastic powder particles made of rubber or the like are layered between the turf members, and sand or the like is placed on the elastic powder particles layer. The inorganic powder particles were arranged in layers.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of artificial turf.

[0002]

[Prior art and its technical problem]

 Artificial turf is widely used in tennis courts, golf course paths, gateball fields, and the ground. Such artificial turf has a structure in which plastic turf members are arranged at a predetermined interval on a plastic sheet, and if the turf member is a projecting or needle-shaped rigid turf member, there is a big difference from the actual turf properties. A soft grass member in the form of fiber thread or ultra-thin strip is planted and used. However, there is a limit to the planting interval of the turf members, and because the turf members are flexible and lacking in rigidity, the turf members become slanted by trampling and the seat surface is partially exposed so that the turf function cannot be exerted. There was a problem that it was easy to get.

As a countermeasure against this, there has been conventionally proposed a method in which sand is filled between turf members, but in this structure, the sand is fluid at first, and the feeling of trampling is good, but the sand is deteriorated. It sinks due to its own weight and the movement of particles due to the passage of rainwater to fill the gaps, and the static pressure due to the user's load and snow is applied, so the density becomes high over time and it becomes as hard as concrete. There was a problem that the original characteristics of artificial turf could not be exhibited, such as slipping during walking or sprinting, increased fatigue due to impact, and irregularity in the bounce of the competition ball. .

The present invention was devised in order to achieve the above-mentioned object, and its purpose is to provide a practical sand-filled man-made grass that does not become hard even after a long period of time due to its simple structure. To provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is an artificial turf in which a turf member is planted on the surface of a sheet-like substrate, and elastic fluff particles made of rubber or the like are filled in layers between the turf members. Inorganic powder particles such as sand are arranged in layers on the product layer.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show an embodiment of an artificial turf according to the present invention, where A is a base floor and B is an artificial turf body laid on the base floor A. The base bed A is preferably made of a water-permeable structure, for example, a water-permeable concrete obtained by combining coarse aggregate with cement or a synthetic resin adhesive as a binder, or a water-permeable asphalt obtained by mixing coarse aggregate with asphalt. . The artificial turf body B is composed of a sheet-like substrate 1 made of plastic having good heat resistance, water resistance and weather resistance, and an infinite number of soft turf members 2 planted at predetermined intervals. A bundle 2a of plastic thin strips having good abrasion resistance is refracted in a hairpin shape at an intermediate portion in the longitudinal direction, and the refraction portion 2b is fixed to the sheet substrate 1 by a welder or the like. The sheet-like substrate 1 is provided with water-permeable holes 10.

In the present invention, the voids of each turf member 2 of the artificial turf body B are filled with the elastic powdery granules 3 in layers with the upper surface of the sheet-like substrate 1 as the bottom, and the elastic powdery granules layer is topped. Inorganic powder particles 4 such as sand are arranged in layers. The elastic powder granules 3 are a kind of a synthetic resin-based crushed product represented by rubber chips obtained by crushing synthetic or natural rubber, styrofoam, expanded polystyrene, expanded polyorifin, and a wood-based crushed product represented by cork. Alternatively, it is a mixture of two or more kinds. The particle size of the elastic powder particles 3 is smaller than the disposition interval of the soft grass member 2, and the average particle size is preferably 3 mm or less and generally about 0.7 to 2 mm. The elastic powdery granular material 3 does not need to have a uniform particle size throughout the layer, and may be composed of a plurality of layers having different particle sizes. In that case, the materials of the layers may be different.

As the inorganic powder granules 4, a material having a larger specific gravity than the elastic powder granules 3 such as silica sand is used so that the elastic powder granules 3 can be pressed stably, and the particle size is the elastic powder granules. 3 or less, for example, an average particle size of 0.5 to 1.5 mm is preferable. The inorganic powder / granular material 4 may be a single layer or a plurality of layers having different particle sizes. The tip of the turf member 2 of the inorganic powder granules 4 is appropriately exposed, and the elastic powder granules 3 will not be dug out even when a spike is stepped on by running or the like, and the good cushioning property of the elastic powder granules 3 can be maintained. It is preferable that the layer thickness, for example, the ratio of the elastic powder / granular material layer to the inorganic powder / granular material layer is 1: 1 to 1: 4. In some cases, an adhesive having a low concentration may be applied to the elastic powdery granules 3 so that the elastic powdery granules 3 are bonded to each other in a dot shape. But you can do it too.

[0009]

[Operation of the embodiment]

 Since the present invention is configured as described above, even if the grass member 2 is flexible and has a weak stiffness, the elastic powder granules 3 are filled in the root region between the grass members 2 and the inorganic powder granules 4 are formed thereon. Since it is filled in layers, it does not fall down even if it is stepped on, and it is possible to maintain good uprightness. Moreover, since the tread surface is the inorganic powder granules 4, it is easy to catch spikes and the like. In addition, since the inorganic powder granules 4 are supported by the elastic powder granules 3 in the lower layer, the cushioning property as a whole is good, and the feeling of trampling and the bouncing of the ball are close to those of natural grass. Further, since the inorganic powder particles 4 are supported by the elastic powder particles 3 in the lower layer, the elasticity of the inorganic powder particles 3 causes the inorganic powder particles to be elastic even when they are stepped on or static pressure is applied by snow. The densification of the granules 4 is prevented, and even if the lower layer of the inorganic powder granules 4 sinks and fills the inter-particle voids of the elastic powder granules 3, the elasticity of the elastic powder granules 3 loosens and moves. Be done. Therefore, the inorganic powdery or granular material 4 does not become hard over time, and good properties can be maintained. Further, since the upper layer of inorganic powder particles 4 is pressed from above, the loose elastic powder particles 3 having a low specific gravity do not float up and are not blown by the wind, and a stable layer state can be maintained. Since the elastic granular material 3 has gaps between the particles, it has good permeability of rainwater, and can flow from the water permeable holes 10 of the sheet-shaped substrate 1 to the base floor A. Further, since it is not necessary to provide a cushion layer between the base floor and the artificial turf body B, and the artificial turf body B can be laid directly on the base floor, the construction can be made easy and easy and inexpensive. it can.

[0010]

[Effect of device]

 According to the present invention described above, in an artificial turf in which a grass member is planted on the surface of a sheet-like substrate, elastic powder granules made of rubber or the like are layered between the grass members, and the elastic powder granules are filled. Since the inorganic powder granules such as sand are arranged in layers on the layer, the good cushioning property and water permeability of the elastic powder granule layer prevent the inorganic powder granules from hardening due to the increase in density, and can be used for a long period of time. It is possible to exhibit good turf performance close to nature, and because the elastic powder / granular material layer is pressed from above by the inorganic powder / granular material, the elastic powder / granular material layer does not disperse and maintains a stable layer state. In addition, the structure is simple, and the construction is easy and inexpensive, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an artificial turf according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

[Explanation of symbols]

 1 sheet-like substrate 2 turf member 3 inorganic powder granules 4 elastic powder granules

Claims (1)

[Scope of utility model registration request] 1. An artificial turf in which a turf member is planted on the surface of a sheet-like substrate, elastic rubber particles made of rubber or the like are layered between the turf members, and sand is placed on the elastic powder particle layer. An artificial grass characterized by arranging inorganic powder particles such as