JPH05140910A - Constructing method for elastic cover body - Google Patents

Abstract

PURPOSE:To prevent the surface of a sheet from damaging by laying a three dimensional net fiber sheet whose inside is cut in a wedge shape of a polymeric paving body on a corner section and burying it in polymeric paving material up to the upper layer base strings of the sheet and applying paint to the polymeric paving material. CONSTITUTION:A polymeric paving body 2 is made on the hard base body 1 at a corner section of a sports field, and a three dimensional net fiber sheet 3 whose inside section is cut at an angle of alpha in a wedge shape so that the line of the stitches of the sheet 3 may be orthogonal to the normal line from the center of the corner is laid on the polymeric paving body 2 so as to be the width of a track course. In the next step, the sheet 3 is buried in a polymeric paving material 4 of 30 to 50 in rubber hardness up to the upper layer base strings of the sheet 3, and polymeric paving material 5 of 60 to 90 in rubber hardness is applied to the sheet 3 in an uneven state to form an elastic covering body. The diameters of the openings in the sheet 3 are made from the same to twice as much as those of the spikes of spiked shoes, and the thickness of the sheet 3 is made from 1/3 to the same as the length of the spikes. This constitution prevents side slipping in running and improves the releasing of pins of spiked shoes, which reduces the damage of the surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an elastic cover on a playground, and more particularly to a method for constructing an elastic cover on a corner portion of a competition track or the like.

[0002]

2. Description of the Related Art A covering for a sports truck comprising an elastic material on a hard substrate is well known and is disclosed in Japanese Patent Laid-Open Publication No.
Japanese Patent Laid-Open No. 2-6540 describes a method of laying a fiber cloth such as glass fiber as a method of reducing the lateral displacement of the surface of the covering body during traveling.

[0003]

Problems to be Solved by the Invention JP-A-52-6540
Although the method of (1) certainly does not cause the side slip, there is a drawback that if the bite of the spike pin is secured, it is difficult to restore by the projecting hole of the pin, the surface layer is significantly damaged, and the number of maintenance is increased.

The present invention solves the above-mentioned drawbacks, and there is no slippage at the time of running in a corner portion, the speed is high without causing a loss in the propagation of stress, the resilience is excellent, and the surface layer is not damaged and the elasticity is easy to maintain. It is intended to provide a covering.

[0005]

The inventors of the present invention have completed the present invention as a result of earnest research in order to solve the above problems.

That is, according to the present invention, a polymer pavement is formed with a predetermined thickness on a hard substrate in a corner portion of a playground, and the alignment of the three-dimensional mesh fiber sheet is perpendicular to the radiation from the center of the corner. After laying the sheet in which the inner part of the sheet is cut into a wedge shape on the polymeric pavement material so as to have a track course width, the polymeric pavement material having a rubber hardness of 30 to 50 is formed up to the upper layer base yarn of the sheet. The present invention provides a method for constructing an elastic coating body, which comprises: filling the surface with a polymer paving material having a rubber hardness of 60 to 90 in an uneven shape to form an elastic coating body.

As the hard substrate used in the present invention, any known hard substrate can be used, but for example, asphalt concrete, cement concrete, PC board and the like are preferably used.

In the present invention, as the polymeric pavement formed on the hard substrate to a predetermined thickness, urethane resin pavement material, rubber chip solidified elastic body having voids, urethane resin pavement material containing rubber chips, rubber elastic sheet, etc. are suitable. Can be used.

In the construction method of the present invention, the use of a three-dimensional fiber sheet is a great feature, and by using this, there is no side slip when running at a corner portion, and the running speed is high without causing a loss in stress propagation, In addition, an elastic coated body having excellent restoring force and less damage to the surface layer and easy to maintain can be obtained.

The three-dimensional mesh fiber sheet used in the present invention is a cloth in which upper and lower layers are woven into polygonal and circular meshes of a triangle or more and / or a cloth in the form of a cloth, and is perpendicular to the surface. It is made of a plastic monofilament, a stainless steel thread, a titanium alloy thread, an aluminum alloy thread, or the like in a direction or an oblique direction to a thickness twice or more the net thickness of the upper and lower base threads. Among them, those having an opening diameter that is the same as the spike diameter of a spike shoe worn by an athlete to 2 times the diameter and a thickness that is 1/3 to the same as the spike length can be suitably used.

The rubber hardness used in the present invention is 30 to 5
As a polymeric paving material of 0 (hereinafter referred to as paving material A),
Any material may be used as long as it has the above-mentioned rubber hardness, but for example, a urethane resin pavement material having one-liquid or two-liquid fluidity can be preferably used.

In practicing the present invention, the pavement material B may be painted as it is, but especially when it is coated in an uneven shape, the pavement material B and spike shoes made of the same material as the pavement material B may be used. Particles having the same diameter to three times the diameter of the spike may be added and used in combination. It is preferable that the pavement material B has a structure in which it is coated in an uneven shape, because the covering body has an appropriate gloss and diffuse reflection of light rays, and has a semi-matte surface.

The urethane resin particularly preferably used for the paving materials A and B in the present invention will be described in detail below.
It is an organic polyisocyanate, for example, 2,
4-tolylene diisocyanate (hereinafter abbreviated as TDI), 65 / 35-TDI, 80 / 20-TDI, 4,
4'diphenylmethane diisocyanate (hereinafter referred to as MDI
Abbreviated), dianisidine diisocyanate, tridene diisocyanate, metaxylylene diisocyanate, hexamethylene diisocyanate, phenylene diisocyanate, 1,5-naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate, hydrogenated MD
I, at least one organic polyisocyanate compound selected from aromatic diisocyanates such as hydrogenated TDI and alicyclic diisocyanates, and a compound having two or more hydroxyl groups at the molecular terminals, for example, Polyester polyols, polyether polyols, polyester polyamide polyols, polycarbonate polyols, polycaprolactone polyester polyols, polybutadiene polyols, polypentadiene polyols, castor oil-based polyols, low molecular weight diols, trimethylolpropane, glycerin, sorbitol, It is composed of at least one compound selected from mannitol, dulcitol and the like.

In the present invention, either a one-component urethane resin or a two-component urethane resin can be used. The one-component urethane resin is preferably a polyether polyol or a polybutadiene polyol, preferably having a molecular weight of about 1,000 to 10,000 and having an average number of functional groups of preferably 2.1 to 2.9. A diol and a triol were used in combination and reacted at an NCO / OH equivalent ratio of 1.5 to 3.5, more preferably 1.5 to 2.0, and a free isocyanate group content of 1 to 10
% Of the isocyanate group-terminated prepolymer, preferably 1 to 5% by weight.
The one-component urethane resin becomes a paving material by curing the terminal isocyanate group with moisture.

Examples of the two-component urethane resin include a mixture of the isocyanate group-terminated prepolymer described for the one-component urethane resin and a compound having two or more active hydrogen groups at the molecular ends. Examples of the compound include polyester polyols, polyether polyols, polyester polyamide polyols, polycarbonate polyols, polycaprolactone polyester polyols, polybutadiene polyols, polypentadiene polyols, castor oil-based polyols, low molecular weight diols, and trimethylol. At least one selected from propane, glycerin, sorbitol, mannitol, dulcitol primary amine compound, secondary amine compound, etc.
One or more compounds may be mentioned. Two-component urethane resin is
When the active hydrogen group of the second component is added to the terminal isocyanate group of the first component, it cures and becomes a pavement material.

The curing mechanism of the one-pack type urethane resin and the two-pack type urethane resin are only slightly different, and there is a difference in performance except for the presence or absence of the mixing work of the two parts and the storage stability of the one part. rare.

In the construction method of the present invention, first, a sheet in which the inner portion of the sheet is cut off in a wedge shape so that the alignment of the meshes of the three-dimensional fiber sheet is perpendicular to the ray from the center of the corner is prepared in advance. I need to put it. By using such a sheet, the running stress of the runner running on the track is almost completely transmitted to the covering body, and the side slip is particularly reduced.

The number of wedge-shaped cut portions and the angle of the wedge-shaped cut portions when cutting the inner portion of the sheet into a wedge shape are not particularly limited, but the angle of the wedge-shaped cut portions is made as small as possible and many. If a wedge-shaped cutout portion is provided, the shape can be made extremely close to an arc along the corner portion of the playing field, and the followability to the corner is excellent. However, it is necessary to consider the labor and quality because the workability along the corner and the workability of the corner are contradictory.

When cutting the inside of the seat into a wedge shape, the radial line at any one point from the center of the radius of curvature of the corner to the circumference of the corner and the runner running at the corner with respect to the alignment of the eyes of the seat. It is necessary to pay attention so that the angle formed by the running line of the running stress of (1) and the horizontal action line is 90 ° (right angle) as much as possible.

The running stress direction of the runner is usually a horizontal direction of stress in a direction at an angle α behind the running direction from a radial line at an arbitrary point on the circumference of the corner portion of the truck. It is a line, and the inside of the above-mentioned sheet is set so that the angle formed by the radiation line at each arbitrary point on the circumference and the horizontal action line of the running stress of the runners running in the corners is as 90 ° (right angle) as possible. It should be cut at an angle α.

The coating of the present invention is not particularly limited in its manufacturing method as long as it has a structure in which the above-mentioned elements are laminated and adhered in the above-mentioned order, but it is usually formed on a hard substrate to a predetermined thickness. After forming a molecular pavement, laying a three-dimensional mesh fiber sheet, and along the corner part so that the wedge part is closed, the upper layer base yarn of the sheet is filled with the polymeric pavement material A, and then the polymeric pavement It is manufactured by a method of coating the material B in an uneven shape.

Next, an example of the elastic coating produced by the construction method of the present invention will be described with reference to the drawings. FIG. 1 shows the structure of an example of an elastic cover according to the present invention, in which a hard substrate 1 is covered with a urethane resin elastic pavement material 2, and then a three-dimensional mesh fiber sheet 3 is installed thereon. The inside of the opening is filled with urethane resin elastic pavement material 4 having a rubber hardness of 40 up to the upper surface base yarn of the three-dimensional mesh fiber sheet 3. A urethane resin elastic pavement material 5 having a rubber hardness of 75 is applied on top of it in a concavo-convex shape.

FIG. 2 is a perspective view of one form of the three-dimensional mesh fiber sheet. FIG. 3 shows the laid state of the elastic covering body of the present invention using a three-dimensional fiber sheet, mainly focusing on the fact that the inner part of the actually laid three-dimensional fiber sheet is cut off as shown in the figure. Shows.

FIG. 4 is a wedge-shaped cut-away view of the three-dimensional mesh fiber sheet used in the present invention, in which one end of the track width is cut at an angle α formed by a radial line from the center of the corner as shown.

[0025]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of an elastic cover of the present invention.

FIG. 2 is a perspective view of a three-dimensional mesh fiber sheet.

FIG. 3 is a diagram showing an laid state of an example of the elastic cover of the present invention using a three-dimensional mesh fiber sheet.

FIG. 4 is a wedge-shaped cutout form diagram of a three-dimensional mesh fiber sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard base material 2 Polymer paving material 3 Three-dimensional netting fiber sheet 4 Polymeric paving material with rubber hardness 40 5 Polymeric paving material with rubber hardness 75 6 Net base yarn of three-dimensional netting fiber sheet 7 Three-dimensional netting of three-dimensional netting fiber sheet

EFFECT OF THE INVENTION Since the elastic coating obtained by the construction method of the present invention uses the three-dimensional mesh fiber sheet, there is no side slip when the corner portion is running, and it can run fast without causing a loss in stress propagation, and The spiking shoe has a particularly remarkable effect in that the elastic cover has good pin detachment, excellent restoring force, and less damage to the surface layer and easy maintenance. In this way, the optimum track surface for two driving purposes could not be established with conventional technology,
This is the first time made by the present invention.

Claims (2)

[Claims] 1. A polymer pavement having a predetermined thickness is formed on a hard base material in a corner portion of a playground so that the alignment of the three-dimensional mesh fiber sheet is perpendicular to the radiation from the center of the corner. After laying a sheet obtained by cutting the inner part of the sheet into a wedge shape on the polymeric paving material so as to have a track course width, the upper layer base yarn of the sheet is filled with the polymeric paving material having a rubber hardness of 30 to 50, Next, rubber hardness of 60-9
A method for constructing an elastic coating body, which comprises coating the polymeric paving material of No. 0 in an uneven shape to form an elastic coating body. 2. The three-dimensional fiber sheet having an open hole diameter equal to or twice the diameter of the spike of the spike shoe and a thickness of 1/3 to the same as the spike length. Construction method 1.