JPS597367Y2 - Artificial lawn laying structure - Google Patents

Description

[Detailed description of the invention] This invention relates to an installation structure that allows easy replacement and repair of artificial grass. Specifically, when replacing or repairing, the artificial grass is easily peeled off from between the foam sheets of the lower layer that fixes the artificial grass. This is aimed at an artificial lawn laying structure consisting of a certain structure.

Artificial turf currently used for stadiums such as baseball fields is created by pouring asphalt or concrete onto the ground that has been leveled, compacted, etc., and then applying rubber foam to the surface using an adhesive. It is made by gluing sheets together and then gluing artificial grass made of composite fibers on top of the sheets through an adhesive layer.

These artificial lawns are made of strong synthetic fibers, so they are relatively durable, but they generally wear out after several years of use, and some areas become severely damaged.
It will inevitably need to be replaced with a new one.

This replacement work can be done by simply peeling off the worn or damaged layer of the artificial lawn and replacing it with a new one. When peeling off, it is impossible to remove the entire adhesive layer on either the artificial grass side or the foam rubber sheet side, and in reality, the foam rubber sheet may be partially peeled off. This causes a mottled condition on the artificial lawn side.

Therefore, the ground side also becomes uneven.

It is difficult to firmly adhere and fix a new artificial lawn to this uneven surface of the foam rubber sheet through a new adhesive layer, and even if adhesive construction is performed, the lawn will have unevenness and parts. This creates hard and soft areas, which can interfere with competition.

Therefore, in the end, the lower layer also has to be replaced with a new one.

In addition, when this lower layer is used to bond the foam rubber sheet to the asphalt surface, the adhesive surface applied to the asphalt surface dissolves a portion of the asphalt, so the two are firmly bonded through the adhesive. be done.

Furthermore, in the case of concrete, there are fine irregularities on the surface, which have an anchoring effect and are also strongly bonded.

Therefore, when peeling a foam rubber sheet from an asphalt or concrete surface, the foam rubber sheet is partially torn and scattered in large quantities on the asphalt or concrete surface, similar to the case described above. becomes.

It goes without saying that it is impossible to apply new adhesive and lay new foam to surfaces in such condition, but it is impossible to completely remove any remaining deposits from surfaces in such condition. This requires a lot of labor and time, and this results in a significant increase in replacement costs.

Therefore, the inventor has devised a laying structure that eliminates the above-mentioned drawbacks of the conventional grass and allows a flat lower layer to be formed when the artificial lawn is peeled off during re-covering.

Next, aspects of the artificial lawn laying structure of this invention will be explained based on illustrative drawings.

The drawing is a longitudinal sectional view showing an example of the construction of an artificial lawn according to the present invention.The structure is as follows: 1 is a leveling layer made by laying crushed stones, etc., and compacted; on this leveling layer, asphalt or concrete is placed. Base layer 2 that can be firmly bonded with layers etc.
Set.

Next, a first foam sheet 4 made of a rubber-based, plastic-based foam, etc. is adhered onto this base layer 2 via a first adhesive layer 3, and then a second adhesive layer 5 is bonded. A second foam sheet 6 made of the above-mentioned foam is adhered through a third adhesive layer 7.
The artificial lawn 11 is adhesively fixed through the.

This artificial lawn 11 is made by intertwining the warp threads 8 of a fabric made up of warp threads 8 and weft threads 9 with fluff 10 such as cut flat set piles or bundled piles of combined fibers, with both ends protruding from the ground texture to the surface. It is something.

As mentioned above, the laying structure of the artificial lawn 11 of this invention is as follows:
The foam sheet layer has a structure of two layers, a first layer and a second layer. For example, when a foam sheet layer with a thickness of 1Q mm is to be laid as the lower layer of an artificial lawn, it is divided into two layers. For example, the first and second foam sheets are 5 mm thick, and the adhesive strength between the first and second foam sheets is the adhesive strength between the first foam sheet 4 and the base layer 2 and the second foam sheet 6.
The adhesive strength between the artificial lawn 11 and the artificial lawn 11 is made smaller than the adhesive strength of both.

Generally, aerated sheets have a coating formed on their outer surface, and although sheets of the required thickness can be made individually or molded, in most cases, the coating surface is formed by slicing a foam slab material. It is removed, sliced into required thicknesses, and used for each purpose.

In this invention, as a method to create the above-mentioned difference in adhesive strength, the film surfaces of the foamed sheet I are bonded together with an adhesive, so that the adhesive strength is equal to that of the exposed air bubbles. In other words, adhesion when bonding foam sheets from which the coating surface has been removed, foam sheets or other objects to be adhered from which the coating surface has been removed, or foam sheets from which the coating surface has not been removed and other objects to be adhered. It can be made smaller than the strength.

In other words, the foam sheets are composed of two foam sheets, the first foam sheet 4 and the second foam sheet 6, and the adhesive strength between these two foam sheets is determined by the adhesive strength of each of the two foam sheets. By making the adhesive strength smaller than that of the opposite side, artificial grass 1
1, when the artificial grass 11 is pulled, the grass separates from the first foam sheet 4 while remaining integrated with the second foam sheet 6, so it is natural that the base layer 2 will last. The first foam sheet 4 remains in a reusable condition without any damage.

The shape of the coated surface of the above-mentioned foam sheet can be achieved by cutting the foam including the coated surface to the required thickness, by gluing the removed coated surface and the foam, or by cutting the foam including the coated surface into the foam. Glue and shape other film materials as a coating surface, or
It can be shaped by a method such as using a single sheet of the required thickness.

As explained above, this invention consists of laminating the foam sheets of the lower layer of the artificial lawn into two layers, and the adhesive strength between the two layers is determined by the fact that the opposite side of each of these two foam sheets is attached to the other adherend. The adhesive strength is lower than the adhesive strength between the artificial lawn and the surface of the artificial lawn, so that the first foam sheet and the second foam sheet can be easily peeled off when reattaching the artificial lawn. Since the adhesive strength is set to be sufficient to withstand, when replacing the worn artificial lawn with a new one, the second foam sheet 6 is peeled off together with the artificial lawn and the first foam sheet is replaced. Since the adhesive can be immediately applied to the surface of the sheet 4, the film side of the new second foam sheet 6 can be adhered, and the artificial grass 11 can be laminated, the replacement work is much easier compared to the conventional one. This not only greatly reduces the number of days required, significantly reduces replacement work costs, but also has many practical effects such as being able to quickly repair the gland when it is not in use. .

[Brief explanation of drawings]

The drawing is a schematic sectional view showing each part of the artificial lawn laying structure of this invention. 2... Base layer, 3... First adhesive layer,
4...First foam sheet, 5...Second adhesive layer, 6...Second foam sheet, 7...
- Third adhesive layer, 11...Artificial lawn.

Claims (1)

[Scope of utility model registration request] Asphalt or concrete. The first layer is placed on the base layer such as cleat.
A first foam sheet made of a rubber-based, plastic-based foam, etc. is adhered via an adhesive layer, and a second foam sheet made of the above-mentioned foam is further set via a second adhesive layer. An artificial lawn is adhered to this upper surface via a third adhesive layer, and the adhesive strength between the first foam sheet and the second foam sheet is adjusted between the first foam sheet and the base layer and between the second foam sheet and the artificial lawn. An artificial lawn laying structure characterized by having a structure in which the first foam sheet and the second foam sheet are easily peeled off from each other at the time of replacement or repair due to the strength of the adhesive being lower than that of the adhesive.