JPH02266007A - Sod-like member - 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 (Field of Industrial Application) The present invention relates to a turf-like member suitable for use in, for example, teeing grounds of golf courses, artificial turf structures such as parks, sidewalks, and playgrounds.

(Prior art and problems to be solved) Conventionally, artificial turf has been made by protruding fiber loops on the surface of the braided fabric using a tufting machine, and lining the back side with rubber etc. to make a carpet-like material, either as it is or with the loops. Artificial turf is known by cutting off the tip of the grass and sprinkling sand 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 maximum height is 4 cm, and the thickness of the fabric and lining is small, so it is difficult to increase the height of the fiber loop. Furthermore, 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 into it, 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 has been set up in the shape of the base, and a patterned artificial turf material is fitted into the base and fixed.
A method of forming artificial turf by spreading sand thereon is known.

However, since the frame is made of plastic, it lacks a natural feel and durability, and 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 root part of a turf-like member having multiple rows of resin strip members was fixed with earth and sand caking material (Japanese Patent Application No. 63-19
No. 8531).

However, although the invention according to the above-mentioned application provides superior effects compared to conventional artificial turf structures, when used for a long period of time, the leaf portions of the upright strip members are trampled and the leaves are trampled horizontally. This caused problems such as the artificial turf structure tending to fall over, the east side of the leaves tend to become stiff, and the artificial turf structure lacks a natural feel.

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 even when used for a longer period of time than conventional turf-like members. do.

(Means for Solving the Problems) As a result of intensive studies to achieve the above object, the present inventors found that by configuring a grass-like member on the east side of a leaf member formed by laminating and fixing net-like members, The inventors have discovered that the above object can be easily achieved, and have thus arrived at the present invention.

(Example) Hereinafter, an example 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, threads 3 are woven into a plurality of edges 4 having a circular cross section formed by folding and stacking net-like members 2 shown in FIG. This keeps it in its original state. This net member 2 is already known and is formed by extruding and stretching a synthetic resin such as polypropylene, polyvinylidene chloride, or nylon (stretching ratio: 5 to 7 times). and a bead-shaped intersection 2b thereof are formed.

FIG. 3 shows a partially sectional perspective view of an artificial turf structure 8 formed using the turf-like member 1 described in section 1. This artificial turf structure 8 is first constructed using the turf-like member 1 shown in FIG.
are arranged at predetermined intervals using a frame member (not shown),
After fixing, the whole is turned over, the root part of the turf-like member 1 is facing up, and a soil caking body consisting of soil and polymer latex is injected onto it, dried to form a bonding layer 5, and then turned over again. After turning it over, a layer of sand 6 is provided on one side of the bonding layer 5 to give it a more natural feel.

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. For example, there are pre-vulcanized or post-vulcanized natural rubber (sulfur-based, organic peroxide-based, etc.), natural rubber graft-polymerized with methyl methacrylate, and depolymerized natural rubber, and synthetic rubbers include styrene-butadiene rubber ( SBR), carboxylated styrene-butadiene rubber (XSBR), '/roloprene (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 combs are preferred. (You can also use a combination of these polymers.)

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 soil 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 within the 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.

In addition, in FIG. 1, as the east 4 of the net-like member 2, the bundle is bent at the center to form a U-shaped east, and a plurality of these U-shaped bundles are fixed as a liquid turf-like member by weaving threads. It's okay.

FIG. 4 shows another embodiment of the net-like member used in the grass-like member 1 of FIG. 1. This net-like member 12 was manufactured in the same manner as the manufacturing process of the net-like member 2 shown in FIG. 3, except that no stretching was performed, and in this case, the intersections of the fibers were fused. However, it is not bead-shaped.

FIG. 5 shows another embodiment of a lawn-like member 21 having a circular cross section.
It is shown. In this embodiment, a plurality of net-like members as shown in FIG. 2 are laminated concentrically and tightly fixed with threads 23 at the root portion.

FIG. 6 shows a partially sectional perspective view of an artificial turf structure 28 manufactured using a plurality of turf-like members 21 shown in FIG. 5 above. In this embodiment, the turf-like member 21 is fixed with a predetermined frame (not shown), the whole is turned over in this state, the root part △ is turned into a "-", earth and sand caking is injected from above, and dried. to form a bonding layer 25, and then turn it over again.
It is manufactured by sprinkling sand 26 on the top of the bonding layer 25. This aspect is very convenient because the grass-like member 21 can be easily arranged.

FIG. 7 shows another embodiment of a grass-like member 31.

In this embodiment, the net-like members 32 are laminated concentrically, a plurality of cylindrical parts 34 having a circular cross section are sequentially arranged, and a thread 37 is sewn into one end of a sheet 38 of cloth or the like, so that the bundles are mutually arranged. This is a grass-like member that is easy to manufacture.

FIG. 8 shows a lawn-like member 41 in yet another embodiment. In this embodiment, the net-like members 42 are laminated concentrically, and as shown in the figure, the thread 47 is sewn in at the lower end to form the root part, and the laminated part is cut at one end to form the eastern part. This is what I did.

(Effects of the Invention) Since the lawn-like member of the present invention is composed of the eastern part of the net-like member formed by laminating and fixing the net-like members, the leaf portion protruding from the ground surface is difficult to fall down and is flexible. is held. Therefore, even if this lawn-like member is used for a long period of time, the natural feeling is maintained for a long time.

[Brief explanation of drawings]

FIG. 1 is a plan view of a lawn-like member that is one embodiment of the present invention, FIG. 2 is a perspective view of a net-like member constituting the lawn-like member of FIG. 1, and FIG. 1 is a partial cross-sectional perspective view of an artificial turf structure manufactured using the turf-like member shown in FIG. 1; FIG. 4 is a perspective view of a net-like member shown in FIG. 2 and another embodiment of the net-like member; 5 is a perspective view of the turf-like member shown in FIG. 1 and another aspect of the turf-like member, and FIG. 6 is an artificial turf structure manufactured using the turf-like member shown in FIG. 5. 7 and 8 are perspective views of a lawn-like member in a different form from the lawn-like member shown in FIG. 1. FIG. ■, 21.31.41... Lawn-like member 2.12.
22.32.42... Net member 3.23.37
．． 47... Thread 5.25... Bonding layer 6.26... Sand layer N')

Claims (5)

[Claims] (1) A lawn-like member having a bundle of leaf members formed by laminating and fixing net-like members. (2) The lawn-like member according to claim 1, wherein the bundle of leaf members is formed by laminating and fixing a plurality of net-like members. (3) The turf-like member according to claim 1, wherein the bundle of leaf members is bent at its center to form a U-shape. (4) The lawn-like member according to claim 1, wherein a plurality of the bundles of leaf members are fixed in a blind shape with threads. (5) The lawn-like member according to claim 1, wherein the bundle of leaf members has a circular cross section.