JPH02174611A - Protection of lawn - Google Patents

Abstract

PURPOSE:To protect turf from stamping damage, improve the drainage and prevent the clogging of turf by growing turf between a pair of corrosion-proof sheets having irregular surfaces and through holes on the bottom. CONSTITUTION:The material for the above sheet is preferably a thermoplastic resin, however, it may be a metal such as stainless steel or a combination of a thermoplastic resin and a metal. The color of the sheet is preferably green. There is no restriction on the structure provided that through holes are opened at least on its bottom. The irregular sheet 1A can be constructed e.g. by assembling zig-zag plate units 2 in lattice form forming spaces 4 between the units. Holes 3 allowing the passage of a runner are opened on the slant face of the unit 2. The sheet is suitable to be laid under the turf. The field to be turfed is dug down, the sheet is placed on the field and covered with soil and turf is placed on the soil. Another sheet is placed on the turf, topdressing is scattered and the turf is sandwiched between the upper and the lower sheets.

Description

[Detailed description of the invention] [Purpose of the invention]

[Industrial Application Field] The present invention is applicable to golf course teeing grounds, greens, and cart roads, as well as to lawns that have been or are likely to be severely trampled on soccer fields, rugby fields, lawn tennis courts, or racetracks. Concerning ways to protect against. [Prior art] (1) The background lawn is not only Japanese grass such as No.
It is a Western species of Shiba commonly known as ``bento'', and is extremely widely used in golf courses and other athletic facilities, parks, private gardens, airports, plazas in front of stations, and even for erosion control work. In recent years, there has been an increasing demand for Western species of Shiba, which does not wither in the winter, to replace the Japanese Shiba, whose above-ground parts die in the winter. By the way, Shiba is a relatively robust plant, but it is used on teeing grounds, cart roads, and greens at golf courses. ,
In areas that are repeatedly stepped on by many people, such as baseball fields, rugby fields, soccer fields, and lawn tennis courts, avoid trampling, which can cause the leaves and stems above the ground to become worn out, and the ground to gradually harden and become clogged. I can't do it,
As a result, Shiva gradually becomes weaker. Therefore, in order to maintain a good lawn condition, in addition to daily work such as watering, weed removal by hand or with chemicals, fertilization, spiking, and mowing, maintenance such as re-covering is essential. Therefore, it takes a lot of manpower and effort. In particular, lawns made of Western grass grass require a considerable amount of work, and in extreme cases, it may even be necessary to spend more than half of the facility management fee on lawn maintenance. (2) Problems with conventional technology In view of the above-mentioned problems in lawn management, there has recently been a movement to replace native natural grass with artificial grass in some sports facilities such as baseball stadiums. . However, artificial turf is only a substitute, and cannot compare to the texture, feel, elasticity, etc. of natural turf. Moreover, it is expensive, and furthermore, the foundation construction itself for drainage requires a large amount of money. Therefore, in order to improve the lawn damage and clogging to some extent, a protective mat M is made by integrating a large number of annular bodies rr... by vertical and horizontal joints j, j... as shown in Fig. 11. Attempts have been made to lay a mat on a lawn surface, but in this known mat, the runners that extend from the inside of the annular body beyond its upper edge cause unpleasant waving on the lawn surface. Moreover, even in this case, the situation in which the roots of the plant are subjected to tread pressure via the r is the same as in the case where no plant is installed, although there are differences in degree, so the tightening of the roots still occurs. Therefore, the present inventor previously developed a "method for planting turf" according to Japanese Patent Application Laid-Open No. 181931/1983. The gist of this known method is to improve drainage by laying uneven bodies with large voids below the lawn, while also reducing the tread pressure exerted on the roots of the grass, and the resulting over-compaction of the soil. This is what we are trying to reduce. As a result of field tests at many golf courses, this method has shown almost satisfactory results; however, there is a problem with doubles caused by missed shots or where there is heavy traffic of people and carts on teeing grounds, greens, and cart roads. It has been shown that the protection effect may be insufficient in places that are easily susceptible to damage, and that there is a limit to the effectiveness of the invention method alone. [Problems to be Solved by the Invention] Therefore, the present invention provides a novel lawn protection method that can protect the above-ground and underground parts of grass even when subjected to heavy foot traffic, competitions, or trampling by horses. It is to provide. (Margin below)

[Structure of the invention]

[Means for Solving the Problems] (1) Overview In order to achieve the above objects, the lawn protection method according to the present invention provides a method for protecting lawns between two uneven structures made of a durable corrosion-resistant material and having a through hole at the bottom. It is characterized by planting shiva. Hereinafter, the various elements constituting the invention will be divided into sections and explained. (21 Uneven structure made of corrosion-resistant material) The term "uneven structure made of corrosion-resistant material" means, for example, thermoplastic resin such as polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyamide, or a copolymer thereof, or stainless steel. It refers to a rugged body made of corrosion-resistant metals such as steel and brass, or a combination of both.However, from the viewpoint of production cost, thermoplastic synthetic resin is the most advantageous material.The color is green. The structure of this structure is essentially free, but it is necessary that at least the bottom surface has a through hole, and the convex part should also have a through hole or a gap if possible. This is desirable.As a specific structure, for example, (1) the uneven structure shown in FIG. A structure in which holes are drilled to allow the passage of running stems, and its modifications; ■ A structure in which the uneven structure is composed of a forward and reverse combination of unit truncated cones with holes on the top and sides, as shown in Figure 2. and its deformations, ■ A structure in which a large number of hollow or solid pile-shaped protrusions stand upright from the perforated substrate surface, as shown in Fig. 3, and its deformations. ■ A honeycomb structure with horizontal holes, as shown in Fig. 4, and its deformations, ■ The perforated plate structure with mutually independent wave-like unevenness in the forward and reverse directions shown in Fig. 5 and its modification; ■ The i-structure braided in a net shape with vertical and horizontal metal wires as shown in Fig. 6, and its modification; ■ Fig. 7 As shown in the figure, a structure in which hollow cylindrical bodies with barbs arranged in a square shape are connected by vertical members and horizontal members having different heights, as well as variations thereof, can be exemplified, but of course, there are variations thereof. However, the above items 1 to 2 are considered to be more practical than the ground type in terms of production and effectiveness, so we will provide supplementary explanations for them below. The structure consists of two unit plates 2 arranged in a zigzag shape at equal pitches, which are combined in a lattice pattern, and each plate has a plurality of through holes 3, 3, etc. This structure has vertical and Since it has a sufficient space 4 (including the hole 3) in the horizontal direction and has sufficient mechanical strength,
To not inhibit the growth of grass roots and running stems, and to effectively prevent soil compaction due to trampling pressure. In addition, as shown in the following example, it is preferable that the height of the structure is selected from a range of about 2 to 5 cm. The frusto-conical structure IB of (2) has a m structure in which each lattice of the lattice structure of (1) is substantially surrounded by a wall 5, and a through hole 6 is added to this wall, and it has a geometric shape. It is defined as a conjugate of regular and inverted truncated cones (truncated cones) lacking a top and bottom surface. The through hole 7 in the top surface of each truncated cone, the through hole 6 in the wall surface of each cone, and the gap (space) 4 between each truncated cone are sufficient for the growth of grass roots and stems. give. Moreover, unlike the former, (a) it is possible to apply injection molding means, (b) it is possible to stack up to the required height, and (c) it is easy to connect each unit structure ( Protrusions 8゜8 and rings 9 provided on each two adjacent sides in the figure
, 9 . . . are connection members that can be connected to the rings and protrusions of adjacent units, respectively. ) and other features, making it highly practical.In addition, barb-like protrusions can be formed around the through hole 7 on the top surface if desired, and this structure is suitable for use in Shimoda (3). When used as an overlay material as described in , it does not give a visual discomfort even when used without dense grass growth, and has the effect of easing the feeling when walking. ■Pile-like structure 1° has many through holes 11, 1.1
A large number of pile-shaped protrusions 12.
12... are made to stand out. The protrusion 12 may be hollow, which can also be integrally molded into the injection molding means, and provides sufficient space for the growth and extension of roots and shoots. It should be noted that it is easy to add a connecting means as in the case of (2). The honeycomb structure ID of (3) is solid, has I & land in terms of pressure resistance, and has notches 13.13 on the upper and lower edges.
By providing ..., it is possible to secure a space for the growth of roots and shoots while maintaining integral moldability. Hole 15, 1 consisting of mutually independent wavy unevenness in the forward and reverse directions of (2)
5. The material structure IE may have a wavy plate structure in which hollow protrusions 14 are connected in forward and reverse directions as shown in the figure, or a half-wave structure in which the protrusions protrude only to one side of the substrate IO. It is also possible to have a so-called corrugated plate in which the peaks and valleys are parallel. In any case, these types of structures have the advantage of being able to mass-produce arbitrary long objects by pressing a long flat plate or by combining extrusion and die processing, but drilling holes requires processing. This is a drawback. ■II structure IP braided into a net shape with vertical and horizontal metal wires
is a so-called wire mesh consisting of vertical and horizontal metal wire stripes, 16...
It is a structure with unevenness similar to the above. Not only is this product easy to mass produce, but if the filaments are made of a copper alloy such as brass, the bactericidal effect of copper ions can be expected to have a bactericidal effect against Rhizoctonia and other pathogenic bacteria. Vertical members 19 have hollow cylindrical bodies 18, 18, and 18 with barbs 2121 arranged in a square shape, each having different heights.
．． Structure l connected with 19... and cross members 20.20...
. Although it is inferior to ■ in terms of pressure resistance, this drawback can be improved by filling it with top dressing, etc. In particular, when attaching a lawn, by piercing the lawn through the thorns 21, you can do it without using a skewer or the like. The fabric has the advantage that it can be held stably, and since the barb 21 is elastically deformed by the load, it does not give pedestrians a sense of discomfort. (3) Selection of a concavo-convex structure Selection of an appropriate concavo-convex structure is important in order to fully exhibit the effects of the invention. The structure laid under the grass must have a pressure resistance that can bear the static load that the grass and the grass above receive, and should also have holes and voids that do not hinder the growth of grass roots and poisonous plants. It is. On the other hand, the upper structure is
Mechanical strength that can withstand the frictional force and shearing force that Shiba receives,
It is primarily necessary to have an air gap that allows free running of the above-ground runners of the grass. For the above reasons, among the various structures (1) to (2) above, those considered to be suitable for laying on the lower side are (1) to (2) and (2), particularly preferably (2) to (2) and (2). On the other hand, as the structure for overlaying on the upper side, ■, ■, and ■, particularly preferably, ■ with barbs. (4) Installation of the structure and planting of grasses Figure 8 shows the work procedure for pasting a lawn using the above-described structure 1a and its modification IB''. After thoroughly dispensing the
Dig down by 10 B and 10 C (where A and C are the heights of the structures 18 and Is', respectively; B is the thickness of the lawn). Of course,
When spreading sand, culture soil, compost, bulk, oil cake, and other fillers for the purpose of soil improvement, dig as deep as the thickness of the layer (I in this figure). Then, spread sand, culture soil, etc. In case of spraying, place the structure 1a on top of the sprayed layer, and cover it with lightly burnt field soil S (as shown in the figure). After that, the lawn was laid out at appropriate intervals, and the structure IB'' was placed on top of it.
Finally, top sand S' is spread to suppress the soil, and then water is sprinkled to complete the construction (Figure C). As shown in the figure, in this case, the lawn area is sandwiched between the upper and lower horizontal bodies IB and 1B''.The above explanation applies to lawn areas such as Noshiba and its garden varieties such as Coralai Shiba and Chosenshiba Although this is an example of a case where a lawn is constructed by pasting, the present invention further applies to Kentarakee bluegrass, which is called Western Birch or Ben I., Wood Meteorgrass, Couping Bent, Red Top, and Astoria Bent. , Italian Rye, Red Fescue, etc. (G, Fe5L)
uca), Agrostis (G, Agrostis),
Naturally, it can also be used for planting G. Poa and other grass plants. In this case, for example, in Fig. C above, after laying the structure IB, scattering and suppressing the seeds of the superior and grass seeds at the same time, and then cutting the structure 1n' on top of it and sprinkling water, and after properly germinating,
Furthermore, it is suppressed by scattering sand. Fig. 9 is an example of a combination of structures 1o and IIl'' applied to planting western birch. Upper side body 1
Each inverted truncated cone of g' is made to fit into an annular barb 21 at the top of each tube 18 of the lower structure IG. When planting Shiba, as shown in the previous figure (a), structures 1o and le' are placed one on top of the other in the dug-out space, and the seeds S
After spreading E together with top sand S°, apply top sand shallowly and sprinkle with water. Once germinated in this way, a layer of top sand is applied to the upper layer.
As shown in the figure, there is a large tunnel-like space inside this combined horizontal corpse, so the grown roots and runners of Shiba can grow freely. In addition, drainage performance during heavy rain is also good. Moreover, although both the upper and lower structures can be laid one on top of the other, the labor of construction can be omitted. [Function] According to the method of the invention described above, as shown in Fig. 10, the grass that has taken root is protected from the static load by the lower structure and from the frictional force and shearing force by the upper structure, and the life of the grass is protected. Because certain roots are prevented from becoming compacted, they can withstand the trampling of large numbers of people, heavy vehicles, and horseshoes. Moreover, the grass roots and poisonous plants can freely extend through the spaces and through holes inside the structure, which makes it difficult for the soil around the roots to become compacted, allowing them to grow smoothly and remain active for a long time. Since compaction of the root soil is less likely to occur, spiking work can be omitted or simplified, which is an advantage that cannot be overlooked in terms of management.

【Effect of the invention】

As explained above, the present invention protects the lawns of golf courses and other sports fields, parks, etc. from trampling damage, and also improves drainage to prevent clogging of the grass itself, thereby maintaining the beauty of the lawn for a long time. By providing a new lawn protection method that can maintain the lawn, it is possible to plant lawns in areas where it was previously considered impossible to plant lawns, thereby contributing to the public life and related industries.

[Brief explanation of the drawing]

1 to 7 are plan views (a) and sectional views (b) showing different forms of uneven structures that can be used in carrying out the present invention, and FIGS. 100 and 9 are views showing the invention method FIG. 10 is an explanatory cross-sectional view illustrating the implementation process, FIG. 10 is a cross-sectional view illustrating the state of growth of grass after the method of the invention is implemented, and FIG. 11 is a perspective view illustrating a known lawn trampling prevention device. be. The meanings of the symbols in each figure are as follows: ■A~1o, 1a': Uneven structure: ・2: Unit plate of 1^; ・3: Through hole of IA; ・5: La, la' Wall of unit truncated cone; 6
: Through hole at 5, 7: Through hole at the top of le, la', 22
: Spin-like projections on the top surface of IB'; 8 and 9: Connection projections and rings of la and 1a''
10:1° substrate; 11:1o through hole, 12:1° stake-shaped protrusion 13:]
Notch 14 on the upper and lower edges of o: Hollow protrusion of IR; ... 15:14 through hole 4: Space of 1A to IE; 16: 1p constituent filament 18: 1o cylindrical body, 19.20: Lo vertical and horizontal members;
21: 18 spines; hair 1 Figure (a) M: known protective mat; r: ring-shaped part of M, j: joint between r; E: soil, L
: Lawn, S: Field soil, s': Top sand, SE: Shiba seeds. Patent applicant: Sungreen Shoji Co., Ltd. Figure B-B (b) Funeral diagram (a) B Kurashi 8 B Tsukasa (A) (B) (C) Tack 10 Diagram

Claims (1)

[Scope of Claims] 1. A method for protecting a lawn, which comprises planting grass lily between two uneven structures made of a durable corrosion-resistant material and having through holes at the bottom. 2. The method according to claim 1, wherein the lower uneven structure is formed by connecting hollow tubular bodies with barbs arranged in a square shape with vertical members and horizontal members having different heights. 3. The method according to claim 1, wherein the lower concavo-convex structure is constituted by a regular combination of unit hollow truncated pyramids arranged in a square shape and having holes at the top and sides. 4. The upper concavo-convex structure is composed of a regular forward and reverse combination of unit hollow truncated pyramids arranged in a square shape and having holes on the top and side surfaces, and the top of one of the hollow truncated pyramids is 2. The method according to claim 1, wherein a barb-like protrusion is provided around the hole. 5. The method according to any one of claims 1 to 4, wherein each uneven structure has a rectangular shape and includes connecting means at the peripheral edge.