JP2588056B2 - Lawn carpet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for transplanting lawns to the surface of newly constructed land such as embankments, parks and golf courses, or for rooftops, exhibition halls, and event halls. The present invention relates to a new high tensile strength natural grass carpet for transplanting and moving, which is used when setting up a lawn to decorate, etc., and further relates to an artificial grass carpet which is installed in a baseball field, a golf T-ground, or the like. In response to the natural demands of the general consumer for turf, there is provided a high tensile strength natural turf carpet which can be substituted for these artificial turf.

[Conventional technology]

Conventionally, when transplanting a lawn to a land,
The grown lawn was cut into strips, transported, and transplanted to the land.

However, in order to transplant turf by such a method, many people are required for peeling, transporting, and planting the turf. Moreover, the weight of the turf for transplantation was heavy, and it was inconvenient to transport.

In order to solve the problem of requiring such manpower, attempts have been made to lengthen the grass for transplantation.

For example, in Japanese Patent Publication No. 50-21373, a flexible mesh structure is laid on a film, and a lawn is grown thereon.
A long turf-carrying laminate made by entwining turf roots with a mesh structure is disclosed.

However, such a method has a problem that a foreign substance called a mesh structure remains between the roots of the transplanted lawn. And when the mesh structure is exposed by being picked up by birds etc., it is caught on human feet etc. and the lawn is peeled off, etc.
If a part of the lawn was damaged, it could spread to other parts by the mesh structure.

One of the present inventors, as disclosed in JP-A-53-75035, solves such a problem by infiltrating the whole root into a thin layer of compost composed of crushed bark, and Has completed a lawn carpet with a supporting organization of.

[Problems to be solved by the invention]

The invention disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 53-75035 is intended for a long lawn carpet that does not use foreign matter such as a mesh structure. There was a problem that it was torn when taking or spreading.

An object of the present invention is to provide a lawn carpet having excellent tensile strength without using a foreign substance such as a mesh structure.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present inventors have proposed an upper layer composed of interleaved lawns of lower leaves, a maximum length of 3 to 8 mm and a thickness of 0.2 to 2 mm
Medium consisting of irregularly shaped bark flakes, such as pinaceae, occupying 30% by weight or more of the size of the root, the middle layer consisting of the roots of the upper grass and the roots extending from it, and the middle grass consisting of the roots of the middle grass Provided is a lawn carpet including a lower layer formed by entanglement of a root extending through a middle layer into a woven fabric.

The feature of the lawn carpet according to this application is the upper layer,
It consists of three layers, an intermediate layer and a lower layer, and these three layers interact with each other to maintain a sheet-like shape and exhibit excellent tensile strength.

The upper layer is a layer of grass with interlaced lower leaves. By crossing the lower leaves of the grass, the lawn carpet according to the present invention is wound in a roll shape, and even when the upper middle layer is reversed, falling of the resin flakes of the middle layer can be prevented by the crossed lower leaves. become.

In order for the lower lobes to intersect sufficiently, the turf is densely grown, and at least once, the upper part of the turf is trimmed, leaving the lower lobes.
It is necessary to promote lower leaf growth.

The middle layer has a maximum length of 3 to 8 mm and a thickness of 0.2 to 2 mm and occupies more than 30% by weight. It is a layer consisting of roots.

Maximum length 3-8mm occupying 30% by weight or more, thickness 0.2-2mm
The large, irregularly shaped bark flakes are used to fix the base of the turf and maintain the sheet-like state when the lawn carpet is rolled up for movement, that is, to provide mold retention. is there. Therefore, this large bark flake needs to have a maximum length of 3 to 8 mm. If it exceeds 8 mm, the mold retention of the middle layer will be improved, but the grass will be grown for a long time before the lower lobes are sufficiently interlaced so that the grass retention is too wide and the mold retention of the entire lawn carpet is obtained. Will be needed. Also, when the thickness is less than 3 mm, the mold holding property of the lawn carpet deteriorates, and when the lawn carpet is turned upside down, there is a possibility that the lawn carpet spills out between the lower leaves of the grass.

The size of the bark does not have to be uniform,
Rather, it is preferable that various sizes are mixed.

The medium in the middle layer may consist of only large bark flakes with a maximum length of 3 to 8 mm and a thickness of 0.2 to 2 mm.
Bark flakes having a maximum length of less than 3 mm, peat moss, solid fertilizer, and the like may be included as long as some voids remain. In the case where the bark flakes having a maximum length of less than 3 mm are mainly bark flakes, at least 30% by weight of bark flakes having a maximum length of 3 to 8 mm and a thickness of 0.2 to 2 mm can provide mold retention.

As a material to be used for imparting mold holding properties, a flaky material that is substantially parallel to a layer is more effective than a granular material such as sand. And usually, to arrange the flakes almost in parallel with the layers,
This is easily done by gently stepping on it.

The thickness of the bark flakes is 0.2 to 2 mm, and if it exceeds 2 mm, the mold holding effect as a flake decreases, and if it is less than 0.2 mm, there is a problem of strength such as cracking in handling as powder. Occurs.

The shape of the bark flakes must be indefinite, and need not be particularly disc-shaped or needle-shaped. In the case of a disc shape, the ratio of the area overlapping with other bark flakes is reduced, and the mold holding effect is also reduced. Moreover, if it is needle-shaped, the entanglement with other bark flakes is improved, and as a whole, it becomes supple, but it becomes bulky and the effect of fixing the root of turf is reduced.

In this regard, compared to the bark of the cedar family that tends to become needle-like,
The best bark of Pinaceae, such as Akamatsu, Kuromatsu, Ezomatsu, Todomatsu, and Karamatsu, is the most suitable.

Resin flakes, both 3-8 mm and those less than 3 mm, absorb water and fertilizer well and release them slowly, and act as a turf growing medium.After transplanting, the bark itself has a slow effect. It also turns into fertilizer and eventually turns into soil and does not remain in the soil as foreign matter.

The lower layer is a layer of turf roots that are entangled with each other, and the entangled roots form a woven layer, holding the bark flakes of the middle layer from below and confining the middle layer in a sandwich with the upper layer. ing.

Such a root layer is formed by growing a lawn on a plastic film, and turf roots that penetrate the middle layer and reach the plastic film extend laterally between the plastic film and the middle layer. Is done. In order to promote the lateral elongation of the roots and to form a woven layer, the turf is grown densely, at least once, in the same manner as when the lower leaves of the turf are sufficiently crossed. Leaving the leaves
It is necessary to mow on the grass to promote root growth.

[Action]

Since the lawn carpet according to the present invention has the above-described configuration, it is considered that the lawn carpet has a high tensile strength by the following operation without using the power of the mesh structure or the like.

The middle layer has a maximum length of 3-8 mm, superimposed almost parallel to the layer,
The presence of the irregular-shaped bark flakes having a thickness of 0.2 to 2 mm has an effect of fixing the root of turf and maintaining a sheet-like shape.

The upper surface of this middle layer is covered by a mesh layer composed of interleaved lower leaves of grass, and the lower surface of the middle layer is supported by a layer of grass roots entangled in a woven fabric, so that the upper and lower layers are Has a function of preventing the middle layer from being collapsed by sandwiching them in a sandwich shape.

On the other hand, the root of the turf is fixed to the middle layer sandwiched in this manner, and the roots that emerge from the lower surface of the middle layer from there are firmly entangled in a woven form to form the lower layer. Has the same action as the network structure.

In addition, the bark that forms the middle layer absorbs water and fertilizer well and acts as a turf growing medium, such as releasing it slowly.After transplanting, the bark itself becomes a slow-acting fertilizer. Since it turns into soil, it does not remain as foreign matter.

〔Example〕

On a horizontal land, a black opaque synthetic resin sheet 70 cm wide and 15 m long with many holes 1 mm in diameter provided at intervals of about 10 cm. This hole is for draining excess water during rainfall, etc.The reason why we used a black opaque one is that when there is nothing on the sheet, weeds grow from the ground under the sheet. This is to prevent

On the other hand, the bark of Akamatsu was crushed to obtain bark flakes through a 7 mm sieve. The distribution of the maximum length of the resin flakes is, in terms of weight percentage, 32% for 3 mm or less, 66% for 3 to 7 mm,
2% were 7 mm or more. The thickness was smaller for smaller ones, thicker for larger ones, about 0.3 mm for a maximum length of about 3 mm, and about 1 mm for a maximum length of about 7 mm. The shape was irregular, such as a triangle, rectangle, trapezoid, or polygon, and was elongated in the direction of the fiber.

130 g of turf seeds and 160 g of fertilizer were added per 30 kg of the resin flakes, mixed well, spread on the above-mentioned synthetic resin sheet, conditioned and beaten to form a layer having a thickness of 2 cm.

After that, water was removed and germinated, and turf was grown as usual.

Two weeks after germination, when the turf extended about 4 cm from the bark flake layer, the grass was cut to a height of 2 cm and topped mainly with nitrogen to promote the growth of leaves and roots.

 Four weeks after germination, the lawn was mowed again.

 Six weeks after germination, a lawn carpet was collected.

In addition, in order to make the growth of the lower leaves and roots more effective, the lawn may be mowed four times a week from two weeks after germination.

The lawn carpet thus obtained had a thick layer in which the roots extending below the middle layer were completely entangled in a woven form, as shown in FIG.

FIG. 1 is an enlarged view of about 2 times. In this figure, A is an upper layer made of lawn, B is a middle layer mainly composed of bark flakes, C is a lower layer made of intertwined roots, D is grass, and E is grass. Large bark flakes appearing in the cross section, F, indicate turf roots. In addition,
Middle bark flakes are omitted except for large ones.

In this grass carpet, the number of shares per 1m ² is about 6
The plant weight was about 1.1 kg and the root weight was about 3.3 kg. The distribution of the maximum length of bark flakes in the lawn carpet was 39% for those having a thickness of 3 mm or less, 60% for those having a length of 3 to 7 mm, and 1% for those having a length of 7 mm or more. on the other hand,
The thickness of the bark flakes was somewhat thicker due to the absorbed water, and was about 0.3 to 1.5 mm.

The conventional lawn carpet disclosed in Japanese Patent Application Laid-Open No. 53-75035 was often cut off when it was wound up into a roll and collected, but the lawn carpet obtained in this example was 5 m high. Even if it was hung, it did not break.

〔The invention's effect〕

Since the lawn carpet according to the present invention has the above-described configuration and function, it has a high tensile strength and is lightweight, so that it can be efficiently stripped, rolled up, transported, pulled out, transplanted, etc. from a growing field. It has excellent effects such as leaving no foreign matter on the transplanted lawn, and has the effect of being able to develop new applications, such as being able to stick lawn on steep, nearly vertical slopes in exhibition halls and the like. .

[Brief description of the drawings]

FIG. 1 is an enlarged view of a part of a cross section of a lawn carpet according to the present invention obtained in an example, which is twice as large. In this figure, A is the upper layer consisting of lawn, B is the middle layer mainly composed of bark flakes, C is the lower layer consisting of entangled roots, D is turf, E is large bark flakes appearing in cross section, and F is the turf root. Show. In addition,
Middle bark flakes are omitted except for large ones.

Claims (1)

(57) [Claims] 1. The upper layer is composed of grass with interleaved lower leaves, the largest being 3 to 8 mm, and the thickness of 0.2 to 2 mm is more than 30% by weight. Medium layer consisting of the medium and the upper part of the lawn root, and the roots extending from it
And a lawn carpet comprising a lower layer formed by entangled in a woven fabric with roots extending through the middle layer from the root of the middle lawn