JP3102510B2 - Construction method of elastic covering - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of applying an elastic covering to a sports field, and more particularly to a method of applying an elastic covering to a corner of a sports track or the like.

[0002]

2. Description of the Related Art Sports track coverings in which an elastic material is provided on a rigid substrate are well known.
Japanese Patent Application Laid-Open No. 2-6540 discloses a method of laying a fiber cloth such as a glass fiber as a method of reducing a lateral shift of a coating body surface during running.

[0003]

Problems to be Solved by the Invention
Although the method of (1) does not cause the risk of side slip, there is a disadvantage that if the bite of the spike pin is secured, it is difficult to restore the spike pin due to the protruding hole, the surface layer is significantly damaged, and the number of maintenance is increased.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks, and has an elasticity that allows for quick running without loss of stress transmission and no loss of stress propagation when running in a corner portion, and has excellent restoring force and easy maintenance with little damage to the surface layer. It is intended to provide a coating.

[0005]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, completed the present invention.

That is, according to the present invention, a polymer pavement having a predetermined thickness is formed on a hard base material at a corner portion of a playground, and an arrangement of three-dimensional mesh fiber sheets is perpendicular to a radiation from the center of the corner. A sheet obtained by cutting the inner portion of the sheet into a wedge shape is laid on the polymer pavement material so as to have a track course width, and a polymer pavement material having a rubber hardness of 30 to 50 is formed up to the upper base yarn of the sheet. And then a polymer pavement material having a rubber hardness of 60 to 90 is coated on the surface in an uneven manner to form an elastic covering.

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

[0008] In the present invention, the polymer pavement formed to a predetermined thickness on the hard substrate is preferably a urethane resin pavement, a rubber chip solidified elastic body having voids, a rubber chip-containing urethane resin pavement, a rubber elastic sheet and the like. Can be used.

A major feature of the construction method of the present invention is that a three-dimensional mesh fiber sheet is used. By using the three-dimensional mesh fiber sheet, there is no side slip at the time of running at a corner portion, and the running can be performed quickly without causing loss in stress propagation. In addition, it is possible to obtain an elastic covering member which has excellent restoring force and has little damage to the surface layer and is easy to maintain.

The three-dimensional mesh fiber sheet used in the present invention is a fabric in which the upper layer and the lower layer are woven into a polygonal or circular mesh of triangles or more and / or a cloth-like woven cloth, and which is perpendicular to the surface. It is made of plastic monofilament, stainless steel thread, titanium alloy thread, aluminum alloy thread or the like in the direction or diagonal direction so as to have a thickness of twice or more the net thickness of the upper and lower base yarns. Above all, those having an opening diameter that is the same diameter as the spike of the spike shoes worn by the athlete to twice the diameter and a thickness that is 1/3 to the same length as the spike length can be suitably used.

The rubber hardness used in the present invention is 30 to 5
As a polymer paving material (hereinafter referred to as paving material A) of No. 0,
Any material may be used as long as it has the above-mentioned rubber hardness. For example, a urethane resin pavement having one-component or two-component fluidity can be suitably used.

In carrying out the present invention, the paving material B may be painted as it is. Particularly, when the paving material B is painted in an uneven shape, a spike shoe made of the same material as the paving material B and the paving material B is used. A particle having the same diameter to three times the diameter of the spike may be used in combination. It is preferable that the paving material B has a structure in which the surface of the paving material B is unevenly coated, since the coating causes a moderate gloss and irregular reflection of light rays to have 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, triden diisocyanate, metaxylylene diisocyanate, hexamethylene diisocyanate, phenylene diisocyanate, 1,5-naphthalenedi isocyanate, polymethylene polyphenyl polyisocyanate, hydrogenated MD
I, an aromatic diisocyanate such as hydrogenated TDI, at least one organic polyisocyanate compound selected from alicyclic diisocyanates, and a compound having two or more hydroxyl groups at 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-part urethane resin or a two-part urethane resin can be used. The one-part 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. Diol and triol are used in combination and reacted at an equivalent ratio of NCO / OH of 1.5 to 3.5, more preferably 1.5 to 2.0, and the free isocyanate group content is 1 to 10
%, Preferably 1 to 5% by weight of an isocyanate group-terminated prepolymer.
The one-part urethane resin becomes a pavement material when the terminal isocyanate group is cured by moisture.

Examples of the two-part urethane resin include a mixture of the isocyanate group-terminated prepolymer described in the one-part urethane resin and a compound having two or more active hydrogen groups at the molecular terminals. 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.
More than one compound may be mentioned. Two-part 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 one-component urethane resin and the two-component urethane resin differ only in the curing mechanism slightly, and the difference in performance except for the presence or absence of the mixing operation of the two components and the storage stability of the one component is as follows. rare.

In the construction method of the present invention, a sheet is first prepared in advance by cutting off the inner portion of the three-dimensional mesh fiber sheet in a wedge shape so that the arrangement of the eyes is perpendicular to the radiation from the center of the corner. Need to be kept. By using such a sheet, the running stress of the runner running on the track is almost completely transmitted to the covering, and side slip is particularly reduced.

The number of the wedge-shaped cut portions and the angle of the wedge-shaped cut portions when the inner portion of the sheet is cut in a wedge shape are not particularly limited. When the wedge-shaped cut portion is provided, the shape can be made very close to an arc along the corner portion of the athletic field, so that the shape along the corner is excellent. However, the ability to follow the corner and the workability of construction are in conflict, so it is necessary to select it in consideration of its labor and quality.

When the inside of the sheet is cut off in a wedge shape, a line from the center of the radius of curvature of the corner to an arbitrary point on the circumference of the corner portion and a runner running in the corner are arranged with respect to the line of the sheet. It is necessary to pay attention so that the angle formed by the horizontal running line of the running stress and the running stress is as 90 ° (right angle) as possible.

The running stress direction of the runner is generally defined by the direction of the horizontal direction of the stress from the normal line at an arbitrary point on the circumference of the corner of the track to the direction of the rearward α with respect to the running direction with respect to the one point. The inside of the above-mentioned sheet is so formed that the angle between the radiation at any one point on the circumference and the horizontal line of running stress of the runner running on the corner is as 90 ° (right angle) as possible. Should be cut at an angle α.

The manufacturing method itself of the coating of the present invention is not particularly limited as long as the above-mentioned components are laminated and adhered in the above-mentioned order, but are usually formed on a hard substrate to a predetermined thickness. After forming a molecular pavement, laying a three-dimensional network fiber sheet, closing the wedge portion and making it along the corner portion, filling up to the upper layer base yarn of the sheet with the polymer pavement material A, and then polymer pavement It is manufactured by a method in which the material B is coated in an uneven shape.

Next, an example of the elastic covering produced by the construction method of the present invention will be described with reference to the drawings. FIG. 1 shows an example of the structure of an elastic covering according to the present invention, in which a hard substrate 1 is covered with a urethane resin elastic paving material 2, and then a three-dimensional mesh fiber sheet 3 is provided thereon. The inside of the opening is filled with a urethane resin elastic pavement material 4 having a rubber hardness of 40 up to the base yarn on the upper surface of the three-dimensional mesh fiber sheet 3. It has a structure in which a urethane resin elastic pavement material 5 having a rubber hardness of 75 is painted on the surface in an uneven manner.

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

FIG. 4 is a wedge-shaped cutaway 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 radiation from the center of the corner as shown in the figure.

[0025]

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of an elastic covering of the present invention.

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

FIG. 3 is a laying diagram of an example of an elastic covering of the present invention using a three-dimensional mesh fiber sheet.

FIG. 4 is a wedge-shaped cutaway view of a three-dimensional mesh fiber sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard base material 2 Polymer pavement material 3D mesh fiber sheet 4 Polymer pavement material with rubber hardness of 40 5 Polymer pavement material with rubber hardness of 75 6 3D mesh fiber sheet mesh base yarn 7 3D mesh fiber sheet 3D yarn

The elastic covering obtained by the construction method of the present invention uses a three-dimensional mesh fiber sheet, so that it can run quickly without causing any side slip when traveling in a corner portion and without causing loss in stress propagation, and The spiked shoe has a particularly remarkable effect that a pin can be easily removed, an elastic covering having excellent restoring force and less damage to the surface layer and easy maintenance can be obtained. Thus, the optimal track surface for the two driving purposes could not be established with the conventional technology,
This is done for the first time by the present invention.

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E01C 13/06 E01C 7/32 E01C 7/30

Claims (2)

(57) [Claims] 1. A polymer pavement having a predetermined thickness is formed on a hard substrate at a corner portion of a playground, and the mesh of the three-dimensional mesh fiber sheet is perpendicular to a radiation line from the center of the corner. After laying the sheet whose inner part is cut into a wedge shape so as to have a track course width on the polymer pavement material, the upper layer base yarn of the sheet is filled with a polymer pavement material having a rubber hardness of 30 to 50, Next, a rubber hardness of 60 to 9
A method for applying an elastic covering, wherein an elastic covering is formed by coating the polymer pavement material of No. 0 in an uneven shape. 2. The three-dimensional mesh fiber sheet according to claim 1, wherein the three-dimensional mesh fiber sheet has an opening diameter equal to or twice the diameter of the spike of the spike shoe and a thickness equal to one third to the same length of the spike length. 1. Construction method.