JPS6032175Y2 - High brightness reflective road studs - Google Patents

Description

[Detailed description of the invention] This invention aims to increase the volatility of reflective road studs installed as traffic control, warning or guidance signs at road median strips, curve points, dangerous zones, etc. and other improvements. It is related to.

As road studs that are retroreflective against the light irradiation of vehicles running at night, reflective lenses, reflective plates, etc. are attached to the sides or slopes of chains made of metal and fixed to the road surface by embedding the legs. This is the main method, but with this method, it is not possible to detect damage to the road surface during embedding work, and because the chain body is high, it causes a large impact when a vehicle tire comes into contact with it, and there is a risk of slipping. For these reasons, its use was limited to median strips on general roads and other limited uses.

In contrast, using ceramic as the main material instead of metal,
Road studs that adhere to the road surface have been developed using synthetic resin and materials that are formed into a hemispherical shape, but these are generally prone to cracking or deformation, and are especially difficult to use if they are made of strong materials. However, the periphery of the hemispherical chain is thin and easily damaged, and if the periphery is made thicker, it becomes flat and has poor drainage, so the reflected light may attenuate or disappear when there is heavy precipitation at night. In addition, if the slope is increased to improve drainage, the chain body becomes taller, which increases the impact on the vehicle and increases the risk of slipping, each of which has its own drawbacks.

The present invention has been corrected and improved based on the above points, does not cause fracture or deformation, is thin, has good drainage, and has no retroreflectivity even during heavy rain at night or when flooded by puddles. The purpose of the present invention is to provide a road stud that is not attached to the road surface.

Next, an example of a road stud molded from the following composition according to the present invention will be described with reference to the drawings.

The figure shows a circular stud; 1 is the center of the rivet, and 2 is a drainage groove that gently descends radially from the center of the rivet toward the outer circumference.

The drainage groove 2 is a triangular groove with a vertical side wall 3 formed on one side, and the peripheral edge cross section is serrated.

4 is a base portion for adhesion to the road surface.

Composition table Unsaturated polyester resin Weight% Glass beads 30 Titanium oxide
20 lucium carbonate fine grains
3 αβ bis(benzoxazoyl) ethylene silicon resin
2. Adipic acid 2. Phthalic anhydride 150% benzoyl peroxide In addition, even if the chain is submerged in water due to heavy rain, the high refractive index of the reflector (glass beads) maintains its retroreflectivity, at least as long as the road surface is passable by vehicles. It remains.

In addition, the slopes of the drainage grooves 2 and the side walls 3 do not lose their function as reflective surfaces for the vehicle's irradiated light regardless of whether it is rain or shine, and almost the entire surface of the chain body serves as a reflector.

It has been confirmed through tests that sludge and dust that may accumulate in the drainage grooves 2 are constantly wiped away by the pneumatic action of tires of passing vehicles and by running water during rainy weather.

As described above, the road studs according to the present invention are significantly thinner than conventional road studs by providing rationality for water drainage, yet retain reflective properties in rainy weather, reduce impact on vehicles, and provide water drainage. The uneven surface formed by the grooves provides a secondary effect of preventing slipping.

[Brief explanation of drawings]

The drawing is a perspective view showing an embodiment of road stud formation. 2°°...Drainage groove, 3...Side wall.

Claims (1)

[Scope of utility model registration request] The main assembly is a binder made from a thermosetting resin, glass beads with a high refractive index, and titanium oxide, and a circular and thin shape is formed by blending an appropriate amount of elasticity imparting agent, extender pigment, aggregate, etc. In this reflective road tack, a plurality of drainage grooves are provided on the surface of the chain body, the surface of which has a radial and gentle downward slope from the center of the tack to the outer periphery, and an inclined surface in one direction perpendicular to the downward direction. A high-volatility reflective road stud, wherein each of the drainage grooves forms a triangular groove having a vertical side wall at the bottom of the slope.