JPH0328404A - Artificial lawn structure - Google Patents

Abstract

PURPOSE:To ensure firm fixation and high durability of artificial lawn by further fixing, by means of combining layers, a lawn member formed through a process of timing the roofs of a plurality of U-shaped thermoplastic synthetic resin lawn members by means of fixing members. CONSTITUTION:Bundles of thin thread-like members made of thermoplastic synthetic resin are twisted. Each of lawn members fixed by binding members 6 consisting of metal wires, plastic tape or the like is guided to cross diagonally notches 9 in the intersecting area of fixing members 5 from the back side and drawn from the front side to be firmly fixed to the fixing member 5. The released ends of lawn members 4 are fixed by combining layers 3 so that they may project outward as leaf portions. Thus, the lawn members can be stably used for along time without readily floating up and parting from the combining layers.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an artificial turf structure useful particularly as a teeing ground of a golf course.

(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 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 knocked off when a club is driven 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.

Recently, a plastic frame was set up in a grid pattern, and seedling-shaped artificial grass was placed inside the grid. A method is known in which artificial turf is shaped by fitting and fixing members and scattering sand thereon.

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

In view of the above-mentioned problems of conventional artificial turf, the present inventors developed an array of thermally heated artificial 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 a plurality of rows of thin strips made of synthetic resin was fixed with earth and sand caking material (Japanese Patent Application No. 1983-1).
No. 98531).

However, although the above-mentioned invention provides superior effects compared to conventional artificial turf structures, it uses rows of strip members, so it cannot be used, for example, on the teeing ground of a golf course, and is If the ball is driven in too many times, the strip member gradually lifts up, and eventually the strip member itself falls off from the teeing ground, which is a problem.

Therefore, an object of the present invention is to provide a strong artificial turf structure in which turf members do not easily fall off even when used for a long period of time, especially on teeing grounds.

(Means for Solving the Problems) As a result of intensive studies to achieve the above object, the present inventors have found that the above object can be easily achieved by adopting an artificial turf structure having the following configuration. This is the heading that led to the present invention.

That is, the present invention provides an artificial turf structure including a turf member including a bundle of fibrous members made of a thermoreversible synthetic resin, and a fixing member for fixing the root portion of the turf member. The present invention relates to an artificial turf structure, characterized in that the turf member and the fixing member are fixed with a bonding layer so that the leaf portions of the turf protrude to the outside.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a partially sectional perspective view of one embodiment of the artificial turf structure of the present invention. In this artificial turf structure 1, a plurality of U-shaped turf members 4 and a fixing member 5 for fixing the root portions of the turf members 4 are arranged such that the open ends of the turf members 4 protrude outside as leaves. is fixed with a bonding layer 3.

FIG. 2 shows a structure used for manufacturing the artificial turf structure l of FIG. 1 before being bonded with a bonding layer 3,
As shown in FIG. 3, the grass member 4 is made by twisting a bundle of strip members cut into a rectangular cross section and fixing them with a binding member 6 made of metal wire, plastic tape, etc., as shown in FIG. As shown in the bottom view, the notch 99 formed at the intersection of the fixing member 5 is diagonally crossed from the back side, and the turf member 4 is pulled from the front side, and the turf member 4 is inserted into the notch 9.
By pushing the turf member 4 into the fixing member 5, the turf member 4 is firmly fixed to the fixing member 5.

As the strip member 8, flat yarn, monofilament yarn, or a mixture thereof made of thermoplastic synthetic resin is preferably used.The grass member 4 on the east side of the strip member 8 is Since it is a twisted yarn bundle, even in the structure before being bonded by the bonding layer 3, the east side of the strip member 8 is maintained in a substantially vertical state.

In addition, after the turf members 4 are bonded with the bonding layer 3 and in the process of actually being used as an artificial turf structure, when sand is removed from the bonding layer 3 or on top of the bonding layer 3 as described later, From the sand layer, the strands of leaves protruding from the outside gradually return to their original shape.
The leaf portion has an appearance in which the strip members 8 are slightly opened outward, similar to natural grass.

The artificial turf structure 1 of the present invention fills the root part A in FIG. and then insert the structure shown in FIG. 2 from above,
After drying and hardening this earth and sand caking material to form a bonding layer 3, or conversely, after fixing the above-mentioned structure within a frame, filling the spaces between the turf members 4 with earth and sand caking material, It can be manufactured by drying and curing. Incidentally, sand is finally sprinkled from above on the artificial turf structure 1 shaped 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. For example, river sand or mountain sand, which produces a gray color, is usually used for golf course teeing grounds.

The size of the soil particles is not particularly limited, and is generally 0.3 to 1. 2 Adopted within the range of m+e.

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 bonding layer 3. 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, gokai rubber, and 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. rubber (SBR), carboxylated styrene-butadiene rubber (X-SBR), chloroprene (CR), and acrylonitrile-butadiene rubber (NBR).

Further, elastic acrylic polymers, polyurethane rubber, etc. 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, the film will form immediately when mixed with earth and sand, making it difficult to handle.

The ratio of polymer solid content (polymer content) to 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 should be 45 to 60% by weight in the first class. It is preferable to use it within the range of .

As the polymer content increases, the elasticity increases, but the water permeability decreases, and on the other hand, as the polymer content decreases, the elasticity decreases, but the water permeability increases.

Further, as described in Japanese Patent Application No. 1-37363, it is preferable to mix crushed rubber pieces into the earth and sand caking body. This allows the bonding layer to remain flexible even during long-term use.

Furthermore, as stated in the application specification dated May 22, 1997, filed by the same applicant as the present applicant,
A ground structure assembly consisting of inorganic particles such as sand, glass particles, calcium carbonate, talc, and clay, or organic particles such as rubber particles and polyethylene pellets, and foamed polyurethane resin (crosslinked if necessary) is also used. be able to.

By using this assembly, it is possible to reduce the weight of the artificial turf structure, and to form an artificial turf structure that is excellent in stepping comfort and processing.

As the above-mentioned sand, the same sand as used in the earth and sand caking body can be used.

The size of the sand particles generally ranges from 0.05 to 3.5 mm in diameter, preferably from 0.5 to 2.5 mm.

As the foamed polyurethane resin, those conventionally used in the production of foamed polyurethane resins are used. Generally, it is obtained by reacting a polyisocyanate and a polyester in the presence of a blowing agent.

As the foaming agent, water or Freon is usually used.

In addition, in the production of foamed polyurethane resin, for example,
Catalysts such as triethylamine and triethylenediamine can also be used.

In addition, in the above, although the east 4 of the U-shaped strip member 8 was shown, it does not necessarily need to be U-shaped. May be a single east. Even with such a position, it can be fixed to the fixing member 5 by pushing it into the notch 9 provided in the fixing member 5. However, on teeing grounds where you hit the ball repeatedly with irons, etc., it may be slightly less durable than the U-shaped one.

In FIG. 5, there is shown a structure different from the grass member 4 in FIG. 3! ! ! A turf member 14 is shown, and this turf member l4 is a third
The outer periphery of a bundle of strip members, which is the same as the grass member 4 in the figure, is surrounded by a net-like member 11 as shown in FIG. 6, except for the tip portion.

By wrapping the net member 11 around the grass member 11, even if the leaf portion of the grass member 14 is stepped on many times, the leaf portion can be held in an almost upright state for a relatively long period of time due to the support of the net member 1l.

Such a mesh member 11 is already known, for example,
Extruding and stretching synthetic resins such as polypropylene, polyvinylidene chloride, and nylon (stretching ratio: 5
~7 times), and in the process, fiber portions 13 and intersection portions 12 are formed.

FIG. 7 shows a partial bottom view of another embodiment of the fixing member 25. In this embodiment, the grid-like fixing member 2
Intersection of 5. A protrusion is provided at the tip, and the turf member 24 is fixed to the fixing member 25 by piercing the turf member 24 with this protrusion.

FIG. 8 shows a U-shaped turf member 34 fixed to a fixing member 35 in another embodiment. In this structure,
Fixed as shown in FIG. The member 35 is a rectangular plate-shaped body having notches 39 provided at equal intervals on both sides, and the turf member 34 is straddled so as to engage the notches W639 from the back side in the drawing, and the turf member 34 is inserted from the front side. The member 34 is pushed into the notch B39 by pulling both ends thereof.

FIG. 10 shows a structure different from the structure shown in FIG. 2. In FIG. In this embodiment, a rectangular plate-shaped fixing member 45 having a groove along the center line is fitted with a plate-shaped fixing member 45 that engages with the groove through grass members 44 arranged at equal intervals along the longitudinal direction of the fixing member 45. The turf member 44 is fixed to the groove by pushing the body 47 toward the groove.
1 shows a structure different from that shown in FIG. 2, in which the turf member 54 diagonally straddles the intersection of the fixed members 55 in the form of lattice plates, as shown in FIG. 12. The turf member 54 is fixed to the fixing member 55 by binding the turf member 54 with the binding member 56 at the part where the straddling is completed.

FIG. 13 shows a structure different from that shown in FIG. 2. In this embodiment, the turf members 64 are fixed at regular intervals along the rod-shaped fixing member 65, and after the turf members 64 are folded back into a U-shape by the fixing member 65, the turf members 64 are tied together by the binding member 66 immediately after the folding. By doing so, the grass member 64 is fixed to the fixing member 65.

FIG. 14 shows a structure different from the structure shown in FIG. 13. In this embodiment, the lawn member 74
By binding the lower end portions of the two parts with binding members 76 and inserting a rod-shaped fixing member 75 between the binding members 76,
A grass member 74 is fixed to a fixing member 75.

(Effects of the Invention) In the artificial turf structure of the present invention, the arranged individual turf members are fixed by the bonding layer, so even when used on a teeing ground and repeatedly driven in with an iron etc., it is easy to use. The turf material does not lift up or separate from the bonding layer, and can be used stably for a long period of time.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional perspective view of an artificial turf structure that is one embodiment of the present invention, and FIG. 2 is a partial perspective view of a structure used in the artificial turf structure shown in FIG. FIG. 3 is a partially omitted plan view showing the structure of the turf member used in the artificial turf structure shown in FIG. 1, and FIG. 5 is a bottom view showing the state; FIG. 5 is a plan view showing the structure of the lawn member in a different form from the lawn member shown in FIG. 3; and FIG. 6 is a net-like member used in FIG. FIG. 7 is a bottom view showing the structure of a fixing member different from the fixing member shown in FIG. 2, and FIG. 8 is a perspective view showing the structure of the fixing member shown in FIG. 9 is a perspective view of a fixing member used in the structure of FIG. 8; FIG. 10 is a perspective view of the structure shown in FIG. 8; FIG. 11-14 are perspective views of a structure different from the structure shown in FIG. 10; FIG. 1...Artificial grass structure 3...Binding layer 4, 1 4, 2 4, 3 4, 4 4, 5 4, 6 4
, 7 4... Strip member 5, 2 5, 3 5, 4 5
, 5 5, 6 5, 7 5... Fixed member Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 10 Fig. 11 Fig. 14 Fig. 75 76

Claims (11)

[Claims] (1) An artificial turf structure including a turf member including a bundle of fibrous members made of thermoplastic synthetic resin, and a fixing member for fixing the root portion of the turf member, wherein the leaf portion of the turf member is external An artificial turf structure, characterized in that the turf member and the fixing member are fixed by a bonding layer so as to protrude from the turf member. (2) The artificial turf structure according to claim 1, wherein the bundle of fibrous members is composed of a plurality of twisted strip members. (3) The artificial turf structure according to claim 2, wherein the outer periphery of the bundle of strip members is surrounded by a net-like member. (4) The artificial turf structure according to claim 1 or 2, wherein the strip member is a flat yarn, a monofilament yarn, or a mixed yarn thereof. (5) The turf member is U-shaped, and the fixing member is a lattice plate, and the U-shaped folded part of the turf member is pushed into a notch provided at an intersection of the lattice plate and fixed. The artificial turf structure according to claim 1, wherein the artificial turf structure is (6) The fixing member is a lattice plate having protrusions at intersections, and the turf member is fixed to the fixing member by piercing the root end of the turf member into the protrusion. The artificial turf structure according to item 2. (7) The fixing member is a rectangular plate-like body having notches provided at equal intervals on both sides, and the base end of the turf member is pushed into the notch, so that the turf member The artificial turf structure according to claim 2, which is fixed to a fixing member. (8) The fixing member is a rectangular plate-shaped body having a groove along the center line, and the rectangular member engages with the groove.
The artificial turf structure according to claim 2, wherein the turf members are fixed to the fixing member by pushing the turf members arranged at equal intervals into the groove. (9) the fixing member is rod-shaped, and the grass members are inserted into the fixing member at equal intervals at the root end thereof;
The artificial turf structure according to claim 2, wherein the artificial turf structure is fixed. (10) The artificial turf structure according to claim 1, wherein the bonding layer is formed from an earth and sand caking body made of earth and sand and polymer latex. (11) The artificial turf structure according to claim 1, wherein the bonding layer comprises inorganic particles or organic particles and a foamed polyurethane resin.