JP2647620B2 - Natural grass mat structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mat structure, and more particularly to a durable natural lawn mat structure used under severe conditions such as an athletic stadium.

[0002]

2. Description of the Related Art Natural lawns are planted in parks and gardens, in playgrounds, athletic stadiums, etc. The method of planting is direct sowing or spraying of turf seedlings and turf seeds to a destination, or The cutting lawn method is often used. In the case of the direct sowing or spraying method, there are problems such as that it takes a long time for the lawn to germinate and grow dense, that it is difficult to plant in a uniform state, and that a large number of humans are required. The upholstered turf method is problematic in that the upland field portion adhering to the cut turf is solidified in the ground due to treading pressure and an impermeable layer is likely to be formed, and it is relatively heavy and inconvenient to handle.

As means for solving these problems, there have been disclosed a large number of mat structures in which natural grass has been vegetated in advance and cultivation methods for obtaining mat structures (for example, JP-A-2-31615, JP-A-2-31615). 2-312521, JP-A-3-164111,
JP-A-4-51823, JP-A-5-49344, JP-A-5-268830, etc.). These structures and construction methods are effective means for achieving the objectives of shortening the lawn vegetation period and the construction period, uniform planting of the lawn, easy handling in transplanting and ground covering, and low cost.

[0004]

By the way, artificial grass is widely used as an alternative to natural grass in terms of easy maintenance, but it relates to athletics, such as soccer, rugby, tennis, and so on. There are some official sports such as golf that are stipulated to be performed on natural grass, but they have excellent durability when used under severe conditions such as the purpose of use such as trampling of a competitor or spike digging There is no effective construction method for forming a natural grass field, and it is an object and a solution of the present invention.

[0005]

According to the present invention, a net-like material 3 is laid on a surface layer of the ground, a cultivation soil 4 holding turf seedlings or turf seeds is laminated on an upper surface thereof, and a mat ground 2 is further disposed on the upper surface.
The mat ground 2 is a three-dimensional knitted fabric in which a three-dimensional mesh-like front side ground structure 7 and a flat knitted flat back side ground structure 8 are connected to each other. Mat structure.

A feature of the cultivation method for obtaining the above structure is that a long net-like material 3 is spread on a leveled ground, a cultivation soil 4 holding turf seedlings or turf seeds is scattered thereon, and a mat is laid thereon. After growing the turf by stacking the ground 2, a part of the turf root is entangled with the net-like material 3 and the turf leaves are made to protrude from the mat surface layer, then peeled from the ground, as if a natural lawn A carpet-shaped structure can be formed.

A net-like object 3 located under the structure
Is obtained by knitting and weaving a yarn such as a synthetic fiber or a natural fiber, and a yarn having an eye gap of about 1 to 15 mm is suitably used. This is because when the grown turf roots extend downward to reach the net-like material 3, most of them extend in the lateral direction without penetrating, and a part of the lawn is entangled with the net-like material 3. In other words, if the eye gap is too large, the grass roots penetrate the net-like material 3 and extend to the ground, and the grass roots are cut off during transplanting so that the active state is not maintained. It inhibits the sex and impairs the growth of the lawn and causes the emergence of pests.

[0008] Matt ground 2 located above the structure
Is a double knitted fabric having a three-dimensional structure, and can be knitted and woven by a double Raschel knitting machine or a moquette loom.
This is to protect the grass roots, and in terms of its durability, rigidity and strength, it is made of synthetic resin monofilament, multifilament, flat yarn, split yarn, etc. It is suitable.

As the shape of the front and back ground structure of the mat base 2, a front ground structure 7 having a quadrangular or hexagonal mesh shape and a back ground structure 8 having a flat plate shape is used. This is because the turf germinates and passes through the back ground tissue 8 and does not prevent the turf leaves from growing and spreading.
Is a mesh shape, and is adopted as the most stable configuration. It is optional to knit the mat ground 2 with a coloring system such as green.

[0010] The connection between the two fabrics on the front and back is wrapped with the connecting yarn 6 to form the matted fabric 2 having a three-dimensional structure. The connection interval and direction can be arbitrarily selected in consideration of the physical properties of the connecting yarn 6 such as vertical, diagonal, and cross. However, the thickness of the mat base 2 is preferably about 5 to 20 mm. This is to protect the grass roots so that the mat ground 2 does not excavate the lawn with spikes or the like. If the mat ground is thick, the degree of compression is excessive and a competitor may feel uncomfortable when stepping on the lawn. However, if the mat is thin, it will not function as a protective material for turf roots.

[0011]

The net-like material 3 laid on the ground 5 protects the root of the turf when the growing turf is peeled off the ground, and makes it easy to peel it off. The cultivation soil 4 on the net-like material 3 promotes the growth of the simultaneously sown turf. The mat ground 2 thereon holds the base of the turf with the upper surface of the cultivated soil and the back side ground structure 8, and the front side ground structure 7 opens the turf leaves with coarse eyes to make it uniform. Therefore, not only does not cause an obstacle to foliage growth, but also the mesh becomes higher than the back side in the connecting thread structure 6, and even if extreme force such as stepping or kicking is applied to the vegetation turf, the root does not peel off. Also, since the mesh is high and has a thickness, if the back side structure and the connecting yarn structure are colored green, there is an effect that the peeled portion of the natural turf is inconspicuous in appearance.

[0012]

EXAMPLE A high-density polyethylene monofilament having a fineness of 385 dr was selected and woven with a weaving density of 10 using a Sulzer loom.
A net 3 having a plain weave of × 10 / inch and a gap of about 2 mm was obtained.

In knitting the three-dimensional knitted fabric which is the mat fabric 2, a 14G double Raschel knitting machine is used, and a schematic side view of a main part of the knitting machine is shown in FIG. This is Needle
91, trick plate 92, stitch comb 93 and reed L1 ~ L5
It consists of. Each reed is composed of an insert reed L1 and a chain reed L2 for knitting the front ground structure 7, a chain reed L4 and an inserted reed L5 for knitting the back ground structure 8, and a connected yarn reed L3 for bridging between the ground structures. It has become.

In knitting the front and back fabrics, a multifilament made of polyester is used for both the chain yarn 95 with a total fineness of 350dr / 46f and the inserted yarn 94 with a total fineness of 150dr / 32f. Using a monofilament having a fineness of 350 dr, a three-dimensional knitted fabric and a mat-free fabric 2 were obtained with the knitting structure shown in FIG. As shown in FIG. 3, the mat base 2 has a front side base structure 7 in the form of a hexagonal mesh, and a back side base structure 8 in a flat plate shape. / m ² and a thickness of 8 mm.

The method for cultivating a natural lawn of the present invention using the member thus obtained will be described below with reference to the cross section of FIG. First, the ground 5 such as a farm or a cured field is leveled and flattened, and a long net-like material 3 having a width of 1.2 m and a length of 10 m is laid on the surface of the ground. Next, on this upper surface, a cultivation soil 4 containing an appropriate amount of a fertilizer or a water retention agent is added to the natural soil as necessary.
Mix turf seedlings and turf seeds into a 3m thick and evenly layered soil. Then, the mat base 2 is laid and cured on the upper surface. When the mat base is relatively thick, it is preferable to cover the upper surface with an appropriate amount of soil. afterwards,
The lawn is raised by giving water and fertilizer as needed.

After a lapse of a predetermined period, the turf leaves are germinated and extended and grown so that the turf roots are entangled with the net-like material 3, and then peeled off from the ground 5, rolled up and transported to the transplant site. You. In this embodiment, a natural lawn roll used as a multipurpose stadium is 10 m long, about 35 cm in diameter and 1.
It was 2 m and weighed about 8 kg. The natural lawn roll is spread to the transplanted place where the soil is rolled after leveling,
The lawn was completed by curing.

When the stadium using the natural lawn mat structure of the present embodiment is compared with a stadium using the conventional cutting lawn method, the frequency of occurrence of flapping of turf and turf leaves by the lawn digging is clearly lower. The durability of the natural lawn under severe conditions could be sufficiently confirmed.

[0018]

The natural lawn mat structure of the present invention is thicker in itself and has a sufficient degree of entanglement of the turf as compared with a conventional simple net-like woven fabric in which turf seedlings are sandwiched and grown. Therefore, even when used in harsh conditions such as stepping or kicking in an athletic stadium or the like, the turf is not peeled off, and a turf having excellent durability can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a main part of a double raschel knitting machine used for knitting a mat ground.

FIG. 2 is a knitting organization chart of a mat ground.

FIG. 3 is a partial perspective view of a mat ground.

FIG. 4 is a cross-sectional view illustrating a method of cultivating a natural lawn according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Natural grass 2 Matt ground 3 Net-like material 4 Cultivation soil 5 Ground 6 Connecting thread structure 7 Front side ground structure 8 Back side ground structure

Claims (1)

(57) [Claims] 1. A net-like material 3 is laid on the surface of the ground, a cultivation soil 4 holding turf seedlings or turf seeds is laminated on the upper surface, and a mat ground 2 is further laid on the upper surface to grow a lawn. A mat structure of a natural lawn, wherein the mat fabric 2 is a three-dimensional knitted fabric in which a three-dimensional mesh front surface structure 7 and a flat knitted flat back surface structure 8 are connected.