JPH02261104A - artificial turf structure - Google Patents

Abstract

PURPOSE:To maintain a natural feeling and flexibility for a long period by forming an artificial lawn structure made by fixing plural bundles of leaf members closely each other with a net-form member at their periphery. CONSTITUTION:In a lawn-form member 1, six bundles 4 of leaf members 2, for example, are arranged each other to make a rectangular section as a whole. Such bundles 4 are lined up in order in the up and down direction, each bundle 4 is composed of plural leaf members 2 which consist of thermoplastic synthetic resin cut in a strip form, and a net-form member 3 is provided at the periphery of the bundles 4 to fix closely the leaf members 2 and to surround them. After arranging the lawn-form members 1 in a specific interval by using a frame member and fixing them, the whole body is turned over, an earth and sand binder is poured, and it is dried to form an artificial lawn structure. Consequently, a natural feeling and a flexibility can be maintained, when it is used for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a turf-like structure suitable for use in, for example, golf course teeing grounds, parks, sidewalks, playgrounds, and other artificial turf structures. Regarding.

(Prior art and problems to be solved) Conventionally, artificial turf has been made into a carpet-like material in which fiber loops are protruded from the surface of the braided fabric using tuft a, and the back side is lined with a comb, etc. Artificial turf is known in which the tip of the loop is cut and sand is sprinkled on it.

However, in such conventional artificial turf, it is difficult to increase the height of the fiber loop due to the nature of the machine, and the limit is 4 cm at most, and the thickness of the fabric part and lining part is small. It lacks a natural feel, and when used as artificial turf for golf courses, it has low strength and is easily bent when driving a club, and is also inferior in durability. In addition, the sand that has been spread is easily blown away by wind and rain, resulting in artificial turf that lacks a natural feel.

On the other hand, recently, a plastic frame was set in the shape of the base, and a cocoon-shaped artificial turf member was fitted into the base and fixed.
It is known to form artificial turf by spreading sand on it.

However, since the frame is made of plastic, it lacks a natural feel and durability, and it is also expensive to manufacture.

In view of the above-mentioned problems of conventional artificial turf, the present inventors developed an array of thermoplastic synthetic turf in order to provide an inexpensive and easy artificial turf that has a natural feel, strength, and durability. A patent application was filed for an artificial turf structure in which the base of a turf-like member having multiple rows of resin strips was fixed with earth and sand caking material (Japanese Patent Application No. 1983-1982).
No. 8531).

However, although the above-mentioned invention provides superior effects compared to conventional artificial turf structures, the upright strip members are trampled upon during long-term use, causing them to fall laterally or This has caused problems such as the artificial turf structure tends to become hard and loses its natural feel as an artificial turf structure. Further, since the bundle of strip members becomes hard, there has been a problem that when used as a teeing ground, a tee cannot be easily inserted into the ball.

Therefore, an object of the present invention is to provide a turf-like member for use in an artificial turf structure that can maintain a natural feel and flexibility when used for a longer period of time than conventional turf-like members. .

(First Step to Solving the Problem) As a result of intensive investigation to achieve the above object, the present inventors have found that the above object can be easily achieved by adopting a grass-like member having the following configuration. This is the heading that led to the present invention.

That is, the present invention includes a net-like member provided on the east side of a leaf member made of a plurality of arranged thermoplastic synthetic resins, and on the outside of the bundle of leaf members, and surrounding the leaf member so as to tightly fix the leaf member. This invention relates to a lawn-like member consisting of:

<Examples> Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows one embodiment of the lawn-like member of the present invention. In this lawn-like member 1, for example, a bundle 4 of six leaf members 2 is assembled together so that the overall cross section is rectangular. As shown in FIG. 2, each wheel 4 consists of a plurality of leaf members 2 made of thermoplastic synthetic resin that are arranged in order in the vertical direction and cut into strips, and on the outer periphery of the east 4, A mesh member 3 as shown in FIG.
is provided to tightly fix the leaf members 2 constituting the bundle 4,
Surrounding. A mesh member 3 as shown in FIG.
is already known and is formed, for example, by extruding and stretching a synthetic resin such as polypropylene, polyvinylidene chloride, or nylon (stretching ratio: 5 to 7 times), and in the process, the fiber portion 3a and its intersection point are formed. A trio is formed.

FIG. 4 shows a partially sectional perspective view of an artificial turf structure 9 formed using the turf-like member 1 described above. This artificial turf structure 9 is constructed by first arranging and fixing the turf-like members 1 shown in FIG. The bonding layer 5 is formed by placing the base of the similar member 1 upward, pouring an earth and sand caking body made of earth and sand and polymer latex onto it, and drying it to form the bonding layer 5. Incidentally, sand is finally sprinkled from above on the artificial turf structure 9 formed in this way, and an artificial turf structure with a natural feel is formed.

Various types of earth and sand are used as the earth and sand, such as sea sand,
Examples include mountain sand, river sand, and crushed sand. The type of sand to be used is determined from the viewpoint of the purpose of use and the landscape. For example, river sand or mountain sand, which produces a gray color, is usually used for golf course teeing grounds.

The size of the earth and sand particles is not particularly limited, and is generally within the range of 0.3 to 1.2 mm.

Generally, the smaller the particle size, the narrower the interparticle gaps, the smaller the amount of rubber that enters, and the greater the hardness of the soil binding layer. On the other hand, as the particle size increases, the amount of rubber that enters between the particles increases, resulting in a product with greater elasticity.

As the polymer latex, natural rubber, synthetic rubber, or derivatives thereof are generally used. Examples include pre-vulcanized or post-vulcanized natural comb (sulfur-based, organic peroxide-based, etc.), natural rubber graft-polymerized with methyl methacrylate, and depolymerized natural rubber. Synthetic rubbers include styrene-butadiene rubber ( SBR), carbokylated styrene-butadiene rubber (XSBR), chloroprene (CR), and acrylonitrile-butadiene rubber (NBR).

Furthermore, elastic arylic polymers, polyurethane rubber, and the like can also be used. From an economic point of view, natural rubber-based rubber is preferred. Moreover, you may use these polymers in combination.

The concentration of polymer latex generally ranges from 5 to 70% by weight. If the concentration is less than 5% by weight,
Although it becomes easier to handle, it is not preferable because the strength of the earth and sand caking body decreases. On the other hand, if the concentration is greater than 70% by weight, a film will be formed immediately when mixed with earth and sand, making it difficult to handle.

The proportion of polymer solids (polymer content) in the mixture of polymer latex and earth and sand can be varied, but in order to obtain a bonding layer with rubber-like elasticity, the polymer content is generally 45 to 60% by weight. It is preferable to use 1 tbsp within a range.

As the polymer content increases, the elasticity increases but the water permeability decreases, while as the polymer content decreases, the elasticity decreases but the water permeability increases.

Note that it is preferable to further mix crushed rubber pieces with the earth and sand caking body. This allows the bonding layer to remain flexible even during long-term use.

FIG. 5 shows a lower member 1 used for the lawn-like member 1 of FIG.
Another embodiment of 20 East 14 is shown.

In this embodiment, flantoyan is used as the lower member, and by selecting the type of furan yarn, grass-like members having various strengths can be constructed.

FIG. 6 shows yet another embodiment of the east 24 of the leaf j2 shrine 22, in which a composite fiber made by twisting two types of fibers is used as the lower member.

FIG. 7 shows another mesh part i13 of the mesh member 3 used in FIG. In this aspect j, the net-like member is manufactured in the same manner as the manufacturing process of the net-like member 3 shown in FIG. are fused, but not bead-shaped.

FIG. 8 shows another embodiment of a lawn-like member 21 having a circular cross section.
It is shown. In this embodiment, the east 21 of the lower member
An east 21b of the lower member is further provided outside of a.

Since the lower member is held double by the net-like members 23a and 23b in this way, the turf-like member 21 is stable and is very convenient for manufacturing an artificial turf structure.

FIG. 9 shows another embodiment of a lawn-like member 31.

In this embodiment, the outer periphery of the bundle of leaf members 32 is surrounded by a net-like member 33 so that the east of the lower member 32 forms a triangular pyramid as a whole, and the base A: the thread 3
6, the leaf member 32 is fixedly held.

FIG. 10 shows a partially sectional perspective view of an artificial turf structure 39 manufactured using a plurality of turf-like members 31 shown in FIG. 9 above. In this embodiment, the lawn-like member 32 is fixed by a predetermined frame (not shown), and in this state, the whole is turned over, with the root part A facing upward, and the earth and sand caking material 3 is placed on top of it.
5 was injected and dried.

FIG. 11 shows another embodiment of a grass-like member 41. In this embodiment, a bundle of a plurality of leaf members 42 arranged in the vertical direction in the figure is surrounded by a sheet-like net member 43 so as to open at one end of the leaf member 42, and a root portion A at the bottom of the figure. It is fixed with a thread 46 so as to form a .

The lawn-like member 41 of this embodiment can be manufactured by wrapping the east side of the leaf member 42 with a cylindrical net-like member 43 and cutting the net-like member 43 on the negative side.

FIG. 12 shows a partially sectional perspective view of an artificial turf structure 49 manufactured using the turf-like member 43 shown in FIG. 11. This artificial turf structure 49 is shown in FIG.
In the same manner as the manufacturing method of the artificial turf structure 9.39 in FIG.
It is manufactured by fixing at predetermined intervals, turning it over, pouring earth and sand caking over it, and drying it.

FIG. 13 shows a lawn-like member 51 in another embodiment. In this embodiment, the east 54 of the leaf member 52 has an elliptical cross section and is tightly surrounded by the net member 53 on the outer periphery.
It is formed by arranging a plurality of wafers in the horizontal direction, and fixing the lower ends thereof to a sheet 58 of cloth or the like via a thread 56 so that the root portion is formed at one end of the 54 on the east side in the figure.

(Effects of the Invention) In the lawn-like member of the present invention, the east of the plurality of arranged leaf members are tightly fixed to each other by the net-like member at the outer periphery, so that artificial grass can be constructed using this lawn-like member. When a body is formed, the part of the leaf member that protrudes from the ground surface is difficult to fall over and maintains flexibility, so the natural feel is maintained for a long time. Further, when this artificial turf structure is used for a teeing ground of a golf course, a tee can be stably stably stuck into the leaf member easily and stably.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a lawn-like member that is one embodiment of the present invention, FIG. 2 is a perspective view of a bundle of leaf members used in the lawn-like member of FIG. 1, and FIG. 1 is a perspective view of a mesh member used in the turf-like member shown in Fig. 1, and Fig. 4 is a partial cross-sectional perspective view of an artificial turf structure manufactured using the turf-like member shown in Fig. 5 and 6 are perspective views showing the structure of a bundle of leaf members in a different manner from the east of the leaf members shown in FIG. 2, and FIG. FIG. 8 is a plan view showing a structure of a net-like member different from that shown in FIG. 10 is a cross-sectional perspective view of an artificial turf structure manufactured using the turf-like member shown in FIG.
12 is a plan view of a lawn-like member in a different form from that shown in FIG. 1, and FIG. 12 is a partially sectional perspective view of an artificial turf structure manufactured using the lawn-like member of FIG. 11. , Figure 13 shows the first
FIG. 1 shows a plan view of a lawn-like member in a different form from that shown in FIG. 1.21.31... Grass-like member 2.12.22.32.42.52... Leaf member 3.13.2333.43.53... Net-like member 4.14.24. 54... East of leaf member 5.35.4
5... Bonding layer

Claims (8)

[Claims] (1) A lawn-like member consisting of a bundle of arranged leaf members made of a plurality of thermoplastic synthetic resins and a net-like member surrounding the leaf members so as to tightly fix them on the outside of the bundle of leaf members. (2) Claim 1, wherein the net-like member extends in a direction perpendicular to the arrangement direction of the leaf members and surrounds the outer periphery of the bundle of leaf members.
The grass-like member described in . (3) The net-like member is parallel to the arrangement direction of the leaf members and surrounds the outer periphery of the bundle of leaf members, and the surrounding body is fixed at its center line and opens at one end of the bundle. The grass-like member according to claim 1. (4) The grass-like member according to claim 2 or 3, wherein the leaf member is a flat yarn. (5) The lawn-like member according to claim 2 or 3, wherein the leaf member is a twisted yarn made of a plurality of threads. (6) The lawn-like member according to claim 1, comprising a plurality of bundles of the leaf members. (7) Claim 1, wherein the leaf member has a rectangular or circular cross section.
The grass-like member described in . (8) The lawn-like member according to claim 1, wherein a plurality of bundles of leaf members are arranged in a horizontal direction and are fixed at the lower ends of the bundles.