JP4509761B2 - Artificial grass - Google Patents

Description

  The present invention mainly relates to artificial turf used in public spaces, sports grounds, multipurpose plazas, and the like.

Artificial turf used in sports stadiums, etc. is a type in which sand or a mixture of sand and rubber chips is laid between imitation turf and imitation turf so that there is little effect on the body (joint, etc.) "Sand filling type" is often used. In this respect, it is distinguished from a type of artificial turf that is not filled with sand, such as rooftops, terraces, and indoors, which are mainly used for walking.
This sand-filled artificial turf was originally made by weaving or sewing imitation turf on a base fabric. In this case, since the base fabric is easily bent by an upper load or the like, the base is treated with a hard material such as asphalt or concrete in order to prevent unevenness. However, in this case, sand etc. is put on the surface of the artificial turf, but the human body load is applied to the landing when it moves violently, flies, or jumps in sports etc. The burden on the knee) is large, and especially for elderly people, women, and non-sports people, it causes fatigue accumulation and human body failure during long play. In addition, in order to lay the base fabric, it is necessary to carefully ground the ground as the base in advance and apply a hard pavement such as asphalt, and then apply the base fabric to the top surface, taking care not to scratch it. In addition, problems such as turning over and bending of the base fabric due to strong side-sliding force during sports cannot be completely wiped out, and various artificial grasses for solving these problems have been proposed.

For example, a large number of rod-shaped elastic bodies are protruded from a base made of hard resin or the like so as to be spaced apart from each other, and imitation grass is provided at the upper end of each elastic body (see Patent Document 1) On the contrary, there is no small wrinkle or deflection, but the net is made of resin or rubber, which is rich in elasticity and flexibility as a whole, and imitation grass is provided at the intersection of nets (see Patent Document 2). Has been proposed.
JP-A-9-49206 Japanese Patent Laid-Open No. 10-114905

In the rod-shaped elastic body of the above-mentioned Patent Document 1, it does not partition the filled sand, and the base of Patent Document 2 does not partition the filled sand, so that it repeatedly moves around, flies and jumps violently. Over time, the sand filled between the imitation turf will move laterally, making it easy to form irregularities and undulations, and the adjacent sands will be layered over a wide area of the artificial turf laying ground due to viscosity etc. There was a problem that the shock absorbing action was lost, and the situation became unsuitable for sports, and the leveling work was frequently required.
In addition, when this artificial turf is used on a slope (slope) or the like, there is a problem that sand flows down below the slope due to wind and rain.

  The present invention has been made in view of the above circumstances, and in a sand-filled type artificial turf, the lateral movement of the filled sand is suppressed so that local unevenness or the like does not occur on the upper portion of the sand-filled surface. Another object of the present invention is to provide an artificial turf that prevents the adjacent sands from solidifying in a layered manner so that the impact absorbing action can be maintained for a long period of time.

In order to achieve the above object, the present invention has taken the following measures.
That is, the artificial turf according to the present invention has a simulated turf and a laying board on which the artificial turf is planted. The imitation turf has a root for each stock in which a lump of leaf-like pieces are grouped together, and the laying board is partitioned in a lattice shape by intersecting partition plates, and a cup-shaped root portion is formed at all intersection positions of each partition plate. A pot is provided. Imitation turf is planted with roots fitted into each root pot of this laying board, and a sand filling chamber is formed between each adjacent root pot surrounded by a partition plate . This sand filling chamber Is formed so as to penetrate vertically .

If the sand filling chamber is formed in this way, the sand filled in each sand filling chamber moves laterally beyond the partition plate even if it repeatedly moves around, flies and jumps violently. That is as much as possible.
In addition, a lump of leaf-like pieces planted in a cup-like root pot at the intersection of the partition plates that divide each sand filling chamber in a grid form spread radially around each root pot and grow crowded. Then, the upper surface of each sand filling chamber is covered from four sides, and the sand in each sand filling chamber is entangled with each other to trap the sand. Thus, it is possible to better prevent the partition board from moving to the adjacent sand filling chamber, and to suppress the displacement and deformation of the floorboard.

Therefore, local unevenness is prevented from occurring at the upper part of the sand filling surface, and a long and flat state is maintained. Moreover, since the sand filling chamber is partitioned by a partition plate as an independent small space, sand is prevented from being layered over a wide range of the artificial grass laying area, and the shock absorption by the sand is prevented. The effect can be maintained for a long time.
The sand filling chamber is preferably formed so as to penetrate vertically. By doing so, not only is it easy to fill the sand, but the sand filled in the sand filling chamber and the ground under the floor are integrated, and displacement and deformation of the floor are prevented. The effect is obtained.

The height of the partition plate can be equal to or higher than the height of the root pot. That is, if the height of the partition plate is equal to the height of the root pot, the above-described action is ensured, and further, if the height of the partition plate is higher than the height of the root pot, The leaf of the imitation turf planted in the root pot can be strengthened, and the return action (buffer action) to the standing state can be maintained for a long time against the load that repeatedly acts from above. The above appearance can also be improved.
The laying board may be provided with a weedproof sheet. In this way, when artificial turf is laid on the sandy soil, weeds can be prevented from breeding, and it can be applied to slopes and other places to make it advantageous for weed management at the place where artificial turf is laid. . Moreover, when a weedproof sheet or the like is provided on the upper part of the laying board, it is possible to prevent the sand from flowing out of the lower sand filling chamber.

In the artificial turf according to the present invention, lateral movement of the filled sand can be suppressed, and local unevenness or the like hardly occurs on the upper part of the sand filling surface. As a result, it is possible to maintain the impact absorbing action of the sand and imitation turf while maintaining a long period of time while suppressing displacement and deformation of the laying board due to external force, so that the soft ground is maintained and the form stability is excellent. Furthermore, it is possible to provide an artificial turf laying body that can be applied to various fields, sports, public spaces, slopes, multipurpose plazas, and the like.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of an artificial turf 1 according to the present invention. The artificial turf 1 has an imitation turf 2 and a laying board 3, and the imitation turf 2 is planted in many numbers while maintaining a predetermined distance from each other in a manner that substantially fills the upper surface of the laying board 3. It is installed.
The laying board 3 (see also FIGS. 5 and 6) is a board body formed with a predetermined thickness by soft or hard plastic, rubber, or the like, and the board surface is formed in a lattice shape by a large number of intersecting partition plates 5. It is partitioned. A cup-shaped root pot 6 is provided at the intersection of each partition plate 5.

The partition plate 5 has an effect of arranging the root pots 6 in an orderly manner and maintaining a predetermined interval between the root pots 6. Further, the partition plate 5 also plays a role of giving a predetermined rigidity as the entire flooring board 3.
Therefore, in this laying board 3, between the adjacent root pots 6, the sand filling chambers 7 are formed independently by being surrounded by the partition plates 5 on four sides. Each sand filling chamber 7 has an upper opening formed at the upper surface level of the laying board 3 and a lower opening formed at the lower surface level of the laying board 3. The upper opening and the lower opening penetrate vertically.

Therefore, as shown in FIG. 4, the sand filling chamber 7 can be easily filled with the sand 8 through the upper opening. Needless to say, when each sand filling chamber 7 is filled with sand 8, the sand 8 is blocked by the partition plate 5, so that it does not move laterally beyond the partition plate 5. Further, when the sand filling chamber 7 is filled with the sand 8, the sand 8 is integrated with the underlying ground at the bottom of the laying board 3 through the lower opening. Lateral movement from the lower opening of the sand 8 is prevented, and displacement and deformation of the laying board 3 are also prevented.
Furthermore, since the space between the upper opening and the lower opening penetrates in the sand filling chamber 7, the water permeability in the thickness direction is ensured as the entire bed 3.

The height of the partition plate 5 is higher than the height of the root pot 6. Therefore, at the part where the partition plate 5 is joined to the root pot 6, the partition plate 5 protrudes upward. A corner portion of the partition plate 5 protruding upward is rounded. This chamfered shape prevents the footwear or the like of a person walking or running on the top from being caught, and prevents the user from feeling uncomfortable.
As described above, the root pot 6 is cup-shaped and has a bottom, but the bottom is provided at a position slightly raised above the partition plate 5 so that a raised bottom-like installation state can be obtained. Yes. Therefore, as shown in FIG. 6, a small gap 10 is formed in the lower part of the root pot 6, and this gap 10 can be used as a water penetration (diffusion) space. The gap 10 can also be used as a needle tip folding storage space for a needle member 27 described later.

A pot hole 6a provided in the root pot 6 in an upwardly opened state is circular, slightly oval, or elliptical. As shown in FIG. 5, a pair of two guide grooves 11 extending in the depth direction are formed on the inner peripheral surface of the pot hole 6a at the opposed positions. When the pot hole 6a is oval, the guide grooves 11 are positioned on both outer sides on the short axis side. These guide grooves 11 are opened on the upper opening side of the pot hole 6a. Note that the bottom portion of the root pot 6 may be closed or opened.
In the present embodiment, the laying board 3 is a square board whose one side is 500 mm. The material was a polyethylene resin. In addition, the crossing angle between the partition plates 5 was 90 °, and the inner dimensions of the meshes formed in each lattice, that is, the sand filling chamber 7, were slightly larger than 20 mm on a side. The root pot 6 has a cylindrical shape, the inner diameter of the pot hole 6a is about 9 to 12 mm, the bottom lift (the height of the gap 10) is 2 mm, and the height of the root pot 6 from the ground contact surface is 12 mm. . The partition plate 5 was 5 mm higher than the root pot 6 (17 mm from the ground contact surface).

In connection with the fact that the floor board 3 is a square board having a side of 500 mm, a plurality of connecting hooks 15 are provided at predetermined intervals on two adjacent sides of the floor board 3, and the other set On the two sides, hook holes 16 with which the hooks 15 are fitted and engaged are provided at the same interval and the same number as the hooks 15 so that they can be interconnected when the laying board 3 is laid.
As shown in FIG. 8, the imitation turf 2 has a root portion 22 for each strain in which a lump of leaf-shaped pieces 21 are collected. The imitation turf 2 is formed of a rope-like turf material 23 as shown in FIG. The turf material 23 is made by bundling a large number of strings 24. In the example shown in the figure, a relatively small number of cords 24 are once twisted as a small-diameter turf material 25, and then a plurality of (about three) turf materials 25 are twisted to form a large-diameter turf material 23. It is.

The string 24 is formed of a resin rich in flexibility and elasticity (shape restoration property), and has a cross-sectional flatness or a circular shape, which is as thin as a real turf leaf shape. A coil-shaped twisted rod may be attached to each string 24.
As a method of forming the imitation turf 2 using the turf material 23, the turf material 23 is cut into an appropriate length, and the middle part in the longitudinal direction is folded in half. After the method of pushing into the pot hole 6a of the pot 6, the leaf-like piece 21 and the root portion 22 are distinguished in advance by binding the folded portion with a wire or a fastening thread or impregnating or applying a molten resin or rubber. There is a method of pushing one by one into the pot hole 6a of each root pot 6.

After the root portion 22 of the imitation turf 2 is pushed into the pot hole 6a of the root portion pot 6, the crotch portion of the pushed portion is scraped, and a bifurcated needle member having a U-shape or U-shape in a state of crossing the center of the stock. 27 is driven toward the root pot 6. For example, as shown in FIG. 9, for driving the needle member 27, a tool 32 that strikes the needle member 27 from the back side with a hammer 31 from a launch guide 30 by air pressure, electric drive, or manual lever operation, What is necessary is just to perform using the die | dye 33 for needle | hook bending.
At this time, the two needle tips of the needle member 27 are positioned by the guide groove 11 provided on the inner peripheral surface of the pot hole 6a, and penetrate the bottom of the root pot 6 while being guided by the guide groove 11, It comes to pierce to the back side. The needle tip protruding in this way is bent and stored in the gap 10 behind the root pot 6. Therefore, the grounding of the root pot 6 is not disturbed.

It should be noted that the needle member 27 may be punched using a material that does not penetrate the bottom of the root pot 6 (the needle tip is not bent). Alternatively, an adhesive may be applied in advance into the pot hole 6a of the root pot 6 to further increase the fixing force of the root portion 22.
After the needle member 27 is driven, the leaf material piece 21 is expressed by unwinding the rope of the turf material 23 at the portion extending to the upper portion of the root pot 6 and separating the string 24.
In addition to this method, for example, the grass material 23 is not cut into a predetermined length from the beginning, but the picked portion is picked up in two in the longitudinal direction in the rope state, and this picked portion is pot holes 6a of the adjacent root pots 6a. After pushing the needle member 27 into the crotch portion of these pushed portions, the turf material 23 is cut between the adjacent root pots 6, and then the leaf-like piece 4 is extended at the portion extending from the pot hole 6a. You may employ | adopt the method of making it express.

In the artificial turf 1 having such a structure, it is not necessary to carefully smooth the ground before laying, and it is not necessary to paving with asphalt or the like. All you have to do is lay down while connecting. Then, after laying, the sand 8 is sown and each sand filling chamber 7 of the laying board 3 is filled with sand (see FIG. 4).
The sand filled in the respective sand filling chambers 7 in this way is limited as much as possible to move laterally beyond the partition plate 5 even if it moves violently, flies and jumps repeatedly on it. Therefore, local unevenness is prevented from occurring at the upper part of the sand filling surface, and a long and flat state is maintained.

The present invention is not limited to the one described in each of the above embodiments, and can be further appropriately changed according to the embodiments.
For example, as shown in FIG. 10, the height of the partition plate 5 can be formed equal to the height of the root pot 6.
Further, the overall planar shape, size, material, etc. of the laying board 3 are not limited at all. For example, it may be a square, a rectangle, a circle or the like having a length and width of about several tens of centimeters, a tatami mat or a sheet shape. It can be vast or long.

Furthermore, as shown in FIG. 11, by installing and embedding a weedproof sheet 40 on the upper part of the bed 3, an artificial turf that has weed prevention is provided even when laying on sandy soil. In this case, the grass prevention sheet 40 is stretched on the upper surface of the spreader 3 before the imitation turf 2 is planted in the root pot 6, and a hole 41 is provided in the root pot 6 portion to imitate the imitation grass 2. This is to keep the lawn 2 from being hindered. In this case, the sand filling chamber 7 is not filled with the sand 8, but the sand 8 is uniformly laid on the laying ground in advance, and the laying board 3 is placed thereon. Place the load from the upper part, push the base into the sand, and let the sand flow into each sand filling chamber from the lower part. The weedproof sheet 40 may be provided on the lower surface of the laying board 3.

It is the middle abbreviation top view showing one embodiment of artificial grass concerning the present invention. It is an AA line arrow directional view of FIG. It is the perspective view which showed a part of artificial turf of FIG. It is the sectional side view which showed the installation condition of the artificial turf of FIG. It is the partial top view which showed the bedboard used with the artificial grass of FIG. FIG. 6 is an enlarged sectional view taken along line B-B in FIG. 5. It is a perspective view which shows the turf material for imitation turf. It is the sectional side view which showed the condition (injection condition of a needle member) which fixes the root part of imitation grass to the root part pot of a flooring board. It is front sectional drawing which showed the condition (situation in the middle of driving in the needle member) which fixes the root part of imitation grass to the root part pot of a flooring board. It is a sectional side view of another embodiment which made the partition plate and the root part pot equal height. It is a sectional side view of another embodiment which gave a weedproof sheet.

DESCRIPTION OF SYMBOLS 1 Artificial turf 2 Imitation turf 3 Laying board 5 Partition plate 6 Root pot 7 Sand filling chamber 21 Leaf-like piece 22 Root

Claims (4)

It has an imitation turf (2) and a laying board (3) for planting it, and the imitation turf (2) has a root (22) for each stock in which a lump of leaf-like pieces (21) are combined. The laying board (3) is partitioned in a lattice pattern by intersecting partition plates (5), and cup-shaped root pots (6) are provided at all intersecting positions of the respective partition plates (5), and each root pot (6 ) Is implanted with imitation turf (2) fitted with roots (22), and a sand filling chamber (7) surrounded by partition plates (5) is formed between adjacent root pots (6). The sand filling chamber (7) is formed so as to penetrate vertically .   The artificial turf according to claim 1, wherein the height of the partition plate (5) is equal to the height of the root pot (6).   2. The artificial turf according to claim 1, wherein the height of the partition plate (5) is higher than the height of the root pot (6).   The artificial turf according to any one of claims 1 to 3, wherein the laying board (3) is provided with a weedproof sheet (40).

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