JPS62280404A - Construction of athletic field made of artificial turf - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to the use of river sand or sea sand, or the sand and organic particulate matter such as rubber chips or cork grains within the turf of an artificial lawn. This invention relates to a method of constructing an athletic field made of artificial turf, which is filled with a mixture of .

[Conventional technology]

Athletic stadiums made of natural soil such as native clay or Anzuca (hereinafter simply referred to as soil stadiums) have problems such as poor water drainage and time-consuming maintenance, as well as sports stadiums made of natural soil such as clay and turf. In order to improve problems such as the tendency for the soles of shoes and balls to slip during wet sports stadiums, sprains caused by being hit by spikes, and abrasions caused by falls, the applicant has filed Utility Model Registration No. 1174248.
As disclosed in the invention of the No. 1 issue, in addition to soil such as river sand or sea sand, synthetic resin particles, wood powder such as sawdust, or relatively hard granular materials such as those used in Antukar are mixed into the grass grain of the artificial lawn. We have developed a so-called "sand-containing artificial turf athletic field" that is filled with one or more types of covering materials.

In addition to the above, for example, to prevent the soil (mainly sand) filled in the artificial lawn from being compacted over time,
The technology of mixing organic granules with rubber elasticity such as comb chips with sand (Utility Model Publication No. 61-5371) provides an effective solution to the contradictory problems of water retention and drainage, and In order to prevent scattering, there are dozens of inventions and ideas, such as a technique (Japanese Patent Application Laid-Open No. 59-24006) in which the sand layer filled in an artificial lawn is composed of a lower layer of fine-grained sand and an upper layer of coarse-grained sand. doing. With the structure of the sand-containing artificial grass sports stadium according to these inventions or ideas, the problems with the soil sports stadium and the stadium made only of artificial grass described above can be effectively improved, and the performance and appearance are similar to those of the natural grass type. It is becoming popular as an athletic stadium that closely resembles a physical stadium.

[Problem that the invention seeks to solve]

However, the athletic field made of artificial grass filled with sand is not without its problems. In other words, in order to achieve excellent ball bounce performance, surface sliding properties, drainage properties, and shock absorption properties, the sand to be filled in the stadium should be filled with consideration for compaction over time after construction. The artificial lawn is filled to a thickness of approximately 80 to 110% of the leaf length of the artificial lawn. Therefore, the whiteness of the sand stands out on the surface of the stadium, and the green of the artificial lawn, which is colored to resemble a natural lawn, is canceled out, and the surface may look like a mere sand-paved surface.

Therefore, the present invention solves the above-mentioned problems and makes the green color of artificial grass stand out, making it look like natural grass +! To provide a construction method capable of efficiently constructing an athletic field made of artificial grass containing sand that resembles the surface of Stadium A.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention constructs an artificial turf athletic field by spreading and laying an artificial turf on a substantially flat base and filling the grain of the turf with sand. When doing so, sand within the large diameter range of the particle size distribution range of the sand is colored green, the colored sand is sprinkled on the artificial lawn together with uncolored sand, and shaken. It is characterized by being filled into the grass grain.

That is, according to the construction method of the present invention, instead of simply coloring the sand to be filled into the artificial lawn in the same green color as the lawn, the large diameter sand within the particle size distribution range is colored green. At the same time, the colored sand was sprinkled on the artificial lawn together with the remaining non-colored sand, and the tips of the leaves of the artificial grass were shaken to cause the comparatively small diameter non-colored sand to settle to the lower layer. The colored sand with a target diameter is made to float to the surface layer.

As mentioned above, the grain size of the sand filled into the grass grains of an athletic field made of sand-containing artificial turf, as well as the filling thickness (amount), determines the athletic performance, sliding performance, and drainage performance of the completed stadium surface. It should be selected appropriately as it is closely related to impact absorption performance, etc. According to a preferred embodiment of the present invention, the sand contains 90% or more of sand with a particle size in the range of about 0.15 mm to 1.21 mm. It is prepared as follows. In addition, as shown in Figure 3 (A), among the sand (S) having the above particle size distribution, it is within the large diameter range including the upper limit, and corresponds to about 3%, preferably 5% by weight of the total amount. The sand (So) is colored green. In this case, if only too large diameter sand is colored, the colored sand will stand out too much on the surface and spoil the appearance.

According to another embodiment of the invention, as shown in FIG.
Sand (St) containing 80% or more of sand in the range of
．． Sand (S2) containing 80% or more of sand in the range of 21 mm to 1.2 mm is prepared, and only the latter sand (S2) is colored green, and then both (Sl, S2) are mixed and mixed as described above. It is also possible to fill the inside of the grass while shaking.

Filling an artificial lawn with the above-mentioned mixed sand of uncolored and colored sand has been developed by the present applicant, for example, in JP-A-60-219307 and JP-A-60-11997.
No. 1 or Japanese Unexamined Patent Publication No. 59-98905, etc., a sand-filling brush equipped with a sand-filling brush that rotates or slides along the surface of an artificial lawn to apply vibrations to the tips of the leaves of the lawn. This is done using a device.

[For production]

According to the construction method of the sand-containing artificial grass sports stadium according to the present invention as outlined above, the large-diameter sand with a predetermined particle size distribution is colored green, and this is mixed with the remaining uncolored sand. Then, use a suitable sand scattering device to spread the cough sand onto the artificial lawn that has been spread and laid on the base, add M to the tips of the leaves of the lawn, and fill it into the grass. Due to the shaking action, the uncolored sand, which is relatively small in diameter among the mixed sand, settles downward into the grass grain, and relatively large sand, which is colored in the same color as the artificial lawn, settles downward into the grass grain. Because the colored sand of the diameter floats to the surface and aggregates, the problem of the whiteness of the sand conspicuously conspicuous as in the case of sports stadiums made of sand-filled artificial turf using only uncolored sand is solved, An artificial grass athletic field is formed that is very similar in appearance and performance to the playing surface of the main turf layer.

〔Example〕

Examples of the present invention will be described below.

[Example 1] FIG. 1 is a partially enlarged sectional view of a sand-filled artificial grass tennis court constructed based on an example of the present invention. The following constituent materials were used in constructing coat (1) of this example.

(a) Artificial lawn knee polypropylene film is cut into thin pieces to make pile yarns (3, 3,...) with a height of 26 mm, and these pile yarns (3, 3,...) are placed on a water-permeable base fabric (4). Artificial lawn formed by planting hair (2).

(b) Dry sand containing 90% or more of sand with a knee particle size of 0.15 mm to 1.2 mm, of which the sand layer with a particle size of 1,0 mm or more was colored in a color <fR. (Colored sand (5), uncolored sand (6)) (c+
Construction procedure: The artificial lawn (2) is spread and laid on a substantially flat base (7), and then a sand scattering device (main body part not shown) with a sand brush (8) is installed. Run it repeatedly,
Spread the dry sand (a mixture of colored sand (5) and uncolored sand (6)) onto the lawn (2), and apply a motion to the leaf tips of the lawn (2) using the brush (8). The sand within the grain of the grass (
5,' 6) was filled. As a result, as mentioned above, relatively small-diameter uncolored sand (6) settles to the lower layer, and relatively large-diameter colored sand (5) rises to the surface, forming a two-layered sand layer as shown in the figure. It was done.

[Example-2] Example-2 except that dry sand prepared as below was used.
This is the same as in case 1.

(All Spring Colored Sand Particle Size Distribution Sand containing 80% or more of sand with a knee particle size in the range of 0.15 mm to 0.6 mm (6).

(1)) Particle size distribution of colored sand Sand (5) containing 80% or more of sand with a knee particle size in the range of 0.21 mm to 1.2 mm.

(C) Construction procedure Example - Dry sand mixed with the above two types of sand (5, 6)
As a result of filling the artificial lawn (2) in the same manner as in 1, the second
As shown in the figure, a layer of colored sand (5) on the surface and a layer of uncolored sand (6) on the lower layer were formed in a state where they intermingled at the boundary between the two layers.

〔Effect of the invention〕

As explained above, the present invention involves coloring the sand within the large diameter range of the grain size distribution range of the sand to be filled into the grass grains of the artificial lawn spread and laid on the base green, and By mixing sand with non-colored sand, scattering the mixed sand on the artificial lawn, applying shaking, and filling it into the grass grains, the surface of the natural grass stadium can be improved in terms of appearance and performance. It is possible to efficiently construct an athletic field made of artificial grass containing sand that closely approximates the

[Brief explanation of drawings]

FIG. 1 is a partially enlarged sectional view of a sand-filled artificial grass tennis court constructed based on one embodiment of the present invention, and FIG. 2 is a partial enlarged sectional view of a sand-filled artificial grass tennis court constructed based on another embodiment of the present invention. 3(A) and 3(B), which are partially enlarged cross-sectional views similar to those shown in the figure, are graphs showing the outline of steel manufacturing methods using colored sand and non-colored sand, respectively, based on the method of the present invention. Reference numerals in each figure The meanings are as follows; □ 1: Entire tennis court, 2: Artificial grass, 3: Pile thread, 4: Base cloth, 5: Colored sand, 6: Uncolored sand, 7: Base, 8: Sand brush , S: gold dust body, s', S2: colored sand, Sl: uncolored sand. Patent applicant Sumitomo Rubber Industries, Ltd. Figure 1 Figure 2 °>--・, b'/t.

Claims (4)

[Claims] (1) When constructing an artificial grass athletic field consisting of spreading and laying artificial grass on a base and filling the grain of the grass with sand, it is necessary to An artificial lawn product characterized by coloring sand within a range green, scattering the colored sand together with uncolored sand onto the artificial lawn, and filling the turf grains with shaking. Construction methods for athletic fields. (2) The grain size of the sand filled in the artificial lawn is approximately 0.15m.
2. The method for constructing an athletic field made of artificial grass according to claim 1, wherein the artificial grass is prepared to contain 90% or more of sand with a diameter of 1.2 mm to 1.2 mm. (3) A patent for coloring sand in a desired color that is within a large diameter range including the upper limit of a predetermined particle size distribution range and accounts for approximately 3% or more, preferably 5% or more by weight of the total amount. A method for constructing an athletic field made of artificial grass according to claim 1 or 2. (4) A method according to claim 1 or 2, in which uncolored sand having a predetermined particle size distribution and colored sand having a predetermined particle size distribution including sand with a larger diameter than the uncolored sand are mixed. Construction method for an athletic field made of artificial grass.