JP2967772B2 - Artificial turf with sand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf containing sand applied to a tennis court, various grounds, and a walking path of a golf course, and the sand scattered in the grass is outside the artificial turf. The present invention relates to sand-containing artificial turf that has been prevented from flowing out.

[0002]

2. Description of the Related Art Artificial turf with sand laid in sports facilities, parks, open spaces, etc. is easier to maintain than natural turf, resistant to bad weather such as rainfall, and used compared to artificial turf without sand. It has the advantage that the burden on the knees and waist of the person is light, and there is little danger of falling due to abrasion, etc.On the other hand, particulate matter such as eye sand filled in artificial turf tends to flow out with rainwater drainage, How to prevent this was a concern.

In order to solve this problem, various measures have been proposed. For example, in Japanese Utility Model Publication No. 4-39842, the pile density of the artificial turf at the edge is made higher than the pile density of the inner area to reduce the size of the granular material. It has been proposed to prevent spills. In JP-A-5-302303,
In addition to the technique described above, it is described that the pile length of the artificial turf at the edge is longer than the pile length of the artificial turf at the inner region. In addition, Japanese Utility Model Publication No. 4-44644 describes that the sand filled in the edge is hardened with resin, and in Japanese Patent Application Laid-Open No. 3-212502, the artificial turf containing sand is replaced with artificial turf instead of artificial turf. It is described that a water-permeable elastic belt is laid in a belt shape.

[0004]

Any of the above techniques (1) to (4) is intended to prevent the outflow of the granular material without lowering the drainage property, but is effective in preventing the outflow of the granular material. It was found that there were problems that there were problems in terms of performance, and that although effective in preventing outflow, there were difficulties in construction and could not be easily implemented.

[0005] That is, in the technique described above, since the density of the turf is high or the turf is long, only sand having a small particle size can be put in this portion, so that the same sand as the others can be put or not put. If sand is put in, the sand tends to flow out into gutters and the like, and if it is not put in, there is a drawback that there is no holding power to support the turf and it is stepped on and falls down.

[0006] However, in such an edge portion where the granular material is not filled, the stepping pressure when a person passes acts almost directly on the base cloth, and an excessive load is applied to the base cloth, and the base cloth is turned up. Problems such as chairs also occur. Therefore, as a countermeasure against such inconveniences, the base cloth at the end side is made of a different high-strength material from the base cloth at the inside area, and this is joined to the base cloth at the inside area at the site, New measures such as fixing the base cloth to the base with an adhesive are required.

[0007] It is generally thought that if the pile length at the edge is increased, it is possible to suppress the outflow of the granular material. However, if the pile length exceeds 15 mm at the edge, the pile will be overwhelmed. It turns out that the pile that was overturned due to the treading pressure when it passed is still lying down, the height of the artificial turf at the edge is lower than the inside area, and the sand stop effect is almost lost Was. Therefore, while a pile length of 15 mm or less has been proposed, a method of inserting a rubber plate or the like under the base fabric to raise the pile has been proposed. However, raising the base fabric causes another problem that drainability is deteriorated. As described above, it has been found that the above technique involves various problems.

Next, in the above-mentioned technology, a curing period of about one day is usually required until the resin is cured, so that the construction is restricted depending on weather during the period, and an inspection after the curing period is also required. It is. Further, if the amount of the resin is too large, the gap between the granular materials is closed and the drainage property is impaired, so that the skill of filling the resin is required.

In the above-mentioned technique, the operation procedure involves mixing elastic particles such as rubber chips and a binder with a binder on site and forming a belt, and similarly, as in the above technique, it usually takes one day until the resin is cured. Since a certain curing period is required, there is a problem similar to that of the technology such as restriction by weather.
In addition, in order to prevent disadvantages during the curing period, it is possible to mix the elastic particles and the binder in advance in the factory, mold the mixture into a belt shape, and transport and fix the same to the site. In the case of molded products made of elastic particles, the volume (length) changes greatly depending on the temperature, and usually does not conform to the design dimensions at the time of construction. This also has to be a skilled operation.

[0010]

In order to solve the above-mentioned problems, the artificial turf containing sand according to the present invention is provided on an artificial turf at an end of the artificial turf containing sand at an inner region inside the edge. Filling granules with an average particle size larger than the granules filled in artificial turf
And the planting interval of the pile of artificial turf at the edge
The edge in a direction intersecting the outer edge of the edge.
It was wider than the planting interval in the direction along the outer edge of the part .

Usually, artificial turf containing sand has a particle size of 0.2 mm.
Granules having a particle size of about 1.5 mm to about 1.2 mm are preferably used in the present invention. The material is generally pea gravel, but ceramic or pea gravel colored with a similar color to the pile may be used.

In order to stably fill the large-grained particles into the artificial turf at the edge, a space for accommodating the particles is required. The interval at which the piles of artificial turf on the side are planted is widened in the direction intersecting the outer edge of the edge, and narrower in the direction along the outer edge of the edge .

Further, in order to enhance the holdability of the granular material at the edge, the pile at this portion may be crimped as required.

[0014] The artificial turf used for the edge portion is obtained by planting a large number of piles obtained by processing a similar synthetic resin or the like into a split yarn or a monofilament yarn on a base cloth made of a synthetic resin such as polypropylene. It is the same as that used for artificial turf pavement with sand. Therefore, it is also possible to extend the artificial turf used for the inner region to the edge, and to make the artificial turf containing sand in which only the particle size of the granular material is larger than that of the inner region. That is, the base fabric of the pile of the artificial turf at the end portion and the base fabric of the pile of the artificial turf at the inner region are made common, thereby improving workability and reducing costs.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The artificial turf 1 shown in FIG. 1 includes a plurality of flat split yarns made of a synthetic resin such as nylon or polypropylene and a plurality of piles 1b made of a monofilament yarn on a base cloth 1a made of, for example, a plain woven fabric of polypropylene. It is constructed by planting. In the grass of the artificial turf 1, there are fine particles 1c composed of fine particles of sand, silica sand, elastic particles of a polymer material, or a mixture thereof, having a fine particle diameter of about 0.2 mm to 1.2 mm. Is filled.

An artificial turf 2 is disposed between the artificial turf 1 and a drain gutter 3 surrounding the artificial turf 1. That is,
The artificial turf 1 is located at the inner region, and the artificial turf 2 is located at the edge. The base cloth 2a and the pile 2b of the artificial turf 2 are composed of the base cloth 1a and the pile 1b of the artificial turf 1.
It is made of the same material as. However, the granular material 2c filled in the artificial turf 2 has a larger particle size than the granular material 1c. With this configuration, the granular material 1c itself is prevented from flowing out due to rainwater while draining water from the gap between the granular materials 2c.

The particle size of the granular material 2c is 1.5 mm to 10.0
mm, preferably 2.0 mm to 8.0 mm, and more preferably 3.0 mm to 6.0 mm. Particle size is 1.
If it is smaller than 5 mm, the possibility of flowing out due to rainwater or the like increases. On the other hand, if it is larger than 10.0 mm, it will not fit easily in the artificial turf and may be kicked out when a person passes.

The material of the granular material 2c is generally pea gravel. However, if the true specific gravity of the granular material 2c is smaller (lighter) than the granular material 1c, the granular material 1c falls under the granular material 2c and becomes granular. The possibility that 2c is pushed out of the artificial turf 2 is increased.
Therefore, the granular material 2c at the end portion is replaced with the granular material 1c at the inner region.
It is preferable that the true specific gravity is equal to or greater than the specific gravity. In addition, by using the ceramic granular material 2c or the like colored in the same color as the pile 2b, the aesthetic appearance can be neatly finished.

On the other hand, the artificial turf 2 may have a specification different from that of the artificial turf 1 in order to enhance the drainage effect while securing the holdability of the granular material 2c. For example, as shown in FIG. 2, the planting interval T ₁ of the pile direction (perpendicular direction) intersecting the outer end side portion, larger than the planting interval T ₂ of the direction of the pile along the outer edge of the end side portion . As a result, the accommodation or holding property of the granular material 2c in the artificial turf 2 is improved, and it is expected that not only the outflow of the granular material 2c due to drainage but also the effect of increasing the kick-out preventing effect can be expected. Further, by the planting interval T ₂ is small, the motion of the particle 2c to the outer edge perpendicular direction end side portion is detention. If the particle size of the granular material 2c is 1.5 mm to 10.0 mm, the planting interval T ₁
May have a particle size greater than 5.0mm~20mm about granulate 2c, planting interval T ₂ are good particle size smaller than 1.0mm~6.0mm about granulate 2c.

In order to prevent the granular material 2c from flowing out, it is also effective to crimp the pile 2b as shown in FIG. 3 in addition to the above measures. When the pile 2b to crimping, since the tip portion 2b ₁ of the pile 2b exiting extending over the granules 2c covers an upper surface of the granules 2c, further enhanced effect of preventing kick of granules 2c. In this case, if the pile 2b is made longer than the thickness of the artificial turf 1, the thickness of the artificial turf 2 will be equal to or greater than the thickness of the artificial turf 1, and the effect of preventing the particulate matter 1c from flowing out due to drainage will also be improved.

As described above, when the artificial turf 1 and the artificial turf 2 are made different from each other, it is general to make them separately and join them together at the site. For example, as shown in FIG. A thin sheet 4 coated with polyvinyl chloride (vinyl chloride) is laid on the lower side of the sheet 2 and the artificial turf 1 and the artificial turf 2 are joined by an adhesive 5 applied to the upper surface of the sheet 4.

However, the present invention is based on the principle of filling a granular material having a large particle size at the end portion, and the materials and structures of the artificial turf 1 and 2 may be basically the same. Therefore, even when different piles are used for the inner region and the end side, the artificial turf can be manufactured by planting the pile 1b and the pile 2b on the same base cloth 1a (2a) as shown in FIG. It is possible. In this case, the joining of the artificial turf 1 and 2 becomes unnecessary, and it is only necessary to selectively use and fill granular materials.

[0023]

EXAMPLE As shown in FIGS. 6C, 6D and 6E, an artificial turf (sand particle size: 0.2 mm to 1.2 mm) containing sand having a pile length of 19 mm and a planting interval of 8 mm was used as an inner region. The artificial turf containing sand of Example 1 and Comparative Examples 2 and 3 was simultaneously applied to the portion (edge) of the tennis court, which is located near the entrance 3 near the entrance where users frequently come and go. The situation after months was compared with each other.

Embodiment 1 As shown in FIGS. 6A and 6B,
A pile crimped with a polypropylene split yarn having a pile length of 25 mm was placed in a direction parallel to the side groove 3 by 6 mm.
An artificial turf planted at an interval of 15 mm in a direction perpendicular to the side groove 3 is placed 2 m in a direction parallel to the side groove 3 and 3 m in a direction perpendicular to the side groove 3.
It was laid with a width of 0 cm and filled with pea gravel having a particle size of 5 to 8 mm.

[Comparative Example 2] An artificial turf in which a pile length of 19 mm and crimped with a polypropylene split yarn were planted at intervals of 3 mm in a direction parallel to the side grooves 3 and 3 mm in a direction perpendicular to the side grooves 3 was used. 2m in the direction parallel to 3,
It was laid in the side groove 3 at a width of 30 cm at right angles. No granules were filled.

[Comparative Example 3] A straight pile having a pile length of 13 mm and not crimped with a polypropylene split yarn was planted at an interval of 3 mm in a direction parallel to the side groove 3 and 3 mm in a direction perpendicular to the side groove 3. 6 on the bottom of the turf
A rubber plate having a thickness of 2 mm was laid on the rubber plate 2 mm in a direction parallel to the side groove 3 and 30 cm in a direction perpendicular to the side groove 3. No granules were filled.

FIG. 7 shows the situation after three months in Example 1 and Comparative Examples 2 and 3.

[0028]

As described above, according to the present invention,
Despite being an artificial turf with sand that is very easy to construct,
It is possible to stably prevent the outflow of particulate matter at the edge for a long period of time without reducing drainage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an artificial turf containing sand according to an embodiment of the present invention.

FIG. 2C is a cross-sectional view of an artificial turf containing sand according to a modified embodiment of the present invention, FIG.
(B) is a view in the direction of arrow B in (C).

FIG. 3 is a sectional view of an artificial turf containing sand according to another modified embodiment of the present invention.

FIG. 4 is a cross-sectional view of a joint portion of a base cloth of artificial turf containing sand.

FIG. 5 is a sectional view of an artificial turf containing sand using a common base cloth.

FIG. 6 is a perspective view of the artificial turf with sand of the present invention.

FIG. 7 is a comparison chart of an example of the artificial turf with sand of the present invention and a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial turf (inside area part) 1a Base cloth 1b Pile 1c Granular material 2 Artificial turf (edge part) 2a Base cloth 2b Pile 2c Granular material 3 Gutter 4 Sheet 5 Adhesive

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E01C 13/08

Claims (3)

(57) [Claims] 1. An artificial turf at an end portion of an artificial turf containing sand is filled with a granular material having an average particle size larger than that of a granular material filled in the artificial turf in an inner region inside the edge portion. Along with the planting interval of the pile of the artificial turf at the end portion, in the direction intersecting the outer edge of the end portion, is set wider than the planting interval in the direction along the outer edge of the end portion. Artificial turf with sand. 2. The artificial turf with sand according to claim 1, wherein the pile of the artificial turf at the end side is crimped. 3. The planting interval of the pile in the direction intersecting the outer edge of the end portion is increased with reference to the particle size of the granular material having a large average particle size filled in the artificial turf at the end portion. The sand-containing artificial turf according to claim 1, wherein a pile planting interval in a direction along an outer edge of the side portion is reduced.