JP2007277935A - Indicating body for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indicating body for a road which is resistant to degradation in visibility even if dirt such as the exhaust gas of a vehicle is adhered. <P>SOLUTION: A reflexive reflective layer 5 is formed on the outer surface of a pole 1 which is provided on a road surface through a base part. Then the reflexive reflective layer 5 is formed by spreading glass beads 6 having reflexive reflective performance on a layer formed of a silicon resin system coating, and a photocatalyst containing layer 7 is formed on the surface of the glass beads 6. Thus, the pole 1 can be formed by retrofitting the glass beads 6 to the pole, and reflexive reflective performance can be obtained by using the existing pole part. The dirt adhered to the surface of the glass bead 6 is dissolved by the reaction of a photocatalyst which is contained in the photocatalyst containing layer 7 formed on the surface of the glass bead 6, and washed away by rainwater or the like even if dirt such as the exhaust gas of a vehicle is adhered on the surface of the glass bead 6. Thus, the reflexive reflective performance of the glass bead 6 can be retained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a road marking body used in a state of being fixed and arranged on a paved road surface for the purpose of lane centerline marking, lane guidance marking, traffic regulation guidance marking, or the like.

  Conventionally, for example, in Patent Document 1, a road sign column in which a part or all of the surface of a columnar base body is retroreflective painted is used to improve retroreflectivity by attaching glass beads to the outer surface of a road marking body. The retroreflective coating film has a reflective layer having a thickness of 20 to 80 μm made of a transparent resin containing a metal powder pigment formed on the surface of the columnar substrate, and a transparent or colorant-containing resin formed on the reflective layer. A fixing layer having a thickness of 10 to 50 μm and a glass bead having a particle diameter of 70 to 150 μm and a refractive index of 1.8 to 2.0, a part of which is embedded and fixed in the reflective layer and the fixing layer. There is disclosed a road marking body, which is a high-visibility road sign pillar, characterized by comprising a glass bead layer formed so as to be densely layered so as to be exposed outside the fixing layer.

JP 2000-160522 A

  However, the road marking body described in Patent Document 1 can effectively perform lane centerline marking, lane guidance marking, traffic regulation guidance marking, etc. for a while after the installation, but the vehicle passing after the installation. As the number of vehicles increases, exhaust gas discharged from the vehicle adheres to the surface and covers the glass beads, so that the retroreflective property is reduced and the original induction function is not exhibited. There was a problem.

  Accordingly, the present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a road marking body in which visibility is hardly lowered even when dirt such as exhaust gas from a vehicle adheres.

  In order to achieve the above object, the present invention is configured as follows. That is, the road marking body according to the present invention has a retroreflective layer formed on the outer surface of the pole portion installed on the road surface via the base portion, and the retroreflective layer is recursively formed on the coating film made of the silicone resin-based paint. Reflective glass beads are dispersed and formed, and a photocatalyst containing layer is formed on the surface of the glass beads.

  In addition, the road marking body according to the present invention has a photocatalyst-containing layer formed in advance on the entire surface of the glass beads, and the glass beads are dispersed in a coating film made of a silicone resin-based paint to form a retroreflective layer. It is characterized by.

  According to the present invention, the retroreflective layer is formed on the outer surface of the pole portion installed on the road surface via the base portion, and the retroreflective layer is formed on the coating film made of the silicone resin-based paint. Since the beads are spread and formed, and the photocatalyst containing layer is formed on the surface of the glass beads, the glass beads can be retrofitted to the pole part to form the pole part. It is possible to provide retroreflectivity. Even if dirt such as vehicle exhaust gas adheres to the surface of the glass beads, the dirt attached to the surface of the glass beads is decomposed by the action of the photocatalyst contained in the photocatalyst containing layer formed on the surface of the glass beads. The glass beads can be washed away by rainwater or the like to maintain the retroreflective properties of the glass beads, and the retroreflective layer can be prevented from being deteriorated by the photocatalyst.

  In the present invention, a photocatalyst-containing layer may be formed on the entire surface of the glass beads in advance, and the retroreflective layer may be formed by spraying the glass beads on a coating film made of a silicone resin-based paint. By doing so, it is possible to form a road marking body with a photocatalytic function on the outer surface simply by applying silicone resin paint on the pole part and spraying glass beads using existing equipment. The increase in manufacturing cost can be suppressed. Compared with the case where glass beads not having a photocatalyst-containing layer on the surface are spread and cured on a pole portion coated with a silicone resin paint on the outer surface, and then the photocatalyst-containing paint is applied to the outer surface and cured. Since the heat history applied to the pole part is reduced, durability can be maintained.

Embodiments according to the present invention will be specifically described below with reference to the drawings.
FIG. 1 is an explanatory view showing the formation of a road marking body according to the present invention, FIG. 2 shows the details of the road marking body shown in FIG. 1, and (a) shows a cross section along line AA in FIG. Sectional drawing, (B) is a partially enlarged sectional view showing further details of (A), and (C) is an enlarged sectional view of glass beads.

  Reference numeral 1 denotes a pole portion which is a cylindrical hollow body. The insertion portion 21 of the cap portion 2 is inserted from the upper end, and the reinforcing material 31 protruding upward from the base portion 3 is inserted from the lower end. The cap part 2 and the base part 3 are attached to the road, and the road marking body is installed on the road surface via the base part 3.

  The cap part 2 and the base part 3 may be attached by adhesion, ultrasonic fusion, or the like. However, it is preferable to perform rotary fusion so that the fusion part is not noticeable and can be firmly fused. For the cap part 2, the insertion part 21 and the inner surface of the pole part 1 are in close contact with each other, and for the base part 3, the lower end of the pole part 1 is inserted into a mounting groove (not shown) provided in the base part 3. , Both or one of them is fused by the frictional heat at the part that is in close contact by rotating.

  Above the pole part 1, the reflector R1 which is a reflection sheet is affixed over the perimeter of the pole part 1 in three places at intervals, and the visibility at night is improved. In the present embodiment, the reflector R1 is attached to the pole portion 1 before fusion, but may be attached after fusion. Further, a reflector R2 in which glass beads are embedded is also wound around the base portion 3 so as to further improve the visibility at night.

  Reference numeral 4 denotes a pole body which is a cylindrical hollow body constituting the pole portion 1, and the glass beads 6 are at least partially part of the retroreflection layer 5 formed on the entire surface of the pole body 4. The pole portion 1 is configured by being exposed and embedded outside the portion 5. By adopting such a structure, the retroreflective property of the glass beads 6 is exhibited, and the pole portion 1 can be provided with the retroreflective property.

  The material forming the pole body 4 is preferably a polyurethane resin that is relatively easy to mold and has high resilience and durability against vehicle collision and stepping, but is not particularly limited, such as vehicle collision. It is only necessary to be able to form a pole that can be bent and reconstructed by, for example, thermoplastic soft polyolefin, which is a thermoplastic synthetic resin having high ease of molding, resilience, durability, and various elastomers such as polyolefin and styrene. Can be used.

  As for the material used for forming the cap portion 2 and the base portion 3, a thermoplastic synthetic resin that is excellent in ease of molding, resilience, durability, etc. can be suitably used as in the case of the pole body 4. The material is not limited and an appropriate material may be used. Further, in integrating with the pole body 4 by fusion, it is preferable to use a material having compatibility with that used for forming the pole body 4, and if the same kind is used, it is resistant to external force and temperature change. Is more preferable.

  The material for forming the retroreflective layer 5 is preferably a silicone resin-based paint that has high adhesion to the pole body 4 and the glass beads 6 and is hardly deteriorated by the photocatalyst-containing layer 7 formed on the surface of the glass beads 6. It is done. After applying this silicone resin-based paint to the pole body 4 by brushing, spraying, dipping, flow coater, etc., spraying glass beads 6 on the silicone resin-based paint in a sufficiently fluid state before curing, The retroreflection layer 5 is formed. And since the particle size of the glass beads 6 used as described later is preferably about 60 to 150 μm, by setting the thickness of the retroreflective layer 5 to about 30 μm to 100 μm, at least a part of the glass beads 6 is recursively. The reflective layer 5 can be exposed to the outside, which is preferable.

  In order to form a photocatalyst containing layer 7 containing a photocatalyst such as titanium dioxide which is excited by sunlight and has a function of decomposing dirt such as exhaust gas on the entire surface of the glass beads 6, a powder such as titanium dioxide is used. It is formed by an appropriate method such as a thermal spraying method in which it is melted and sprayed, a CVD (chemical film forming method) for depositing titanium dioxide through a chemical reaction, a sputter deposition method in which titanium dioxide or the like is deposited by sputter evaporation, or a vacuum deposition method. However, it is preferable to disperse titanium dioxide or the like in a binder to obtain a coating composition, which is applied by dipping, spraying, flow coating or the like, because a uniform and smooth coating film is formed.

  When forming the photocatalyst containing layer 7 by such a method, it is preferable to use a silicone compound as a binder. By using a silicone-based compound, the resulting photocatalyst-containing layer 7 has a high surface hardness and is less likely to be scratched, and is also activated by activated titanium dioxide or the like because it has excellent chemical resistance and stain resistance due to siloxane bonds. It is difficult to deteriorate and contaminants are less likely to adhere.

  The photocatalyst-containing layer 7 is transparent and thin, and approximates the refractive index of the glass beads 6, so that the normal reflection and incidence of light on the glass beads 6 is not hindered, and the glass beads 6 are retroreflected. There is no loss of sex. And it is preferable that the film thickness shall be 0.01 micrometer-3.0 micrometers. If the thickness is too thin, the amount of photocatalyst particles such as titanium dioxide decreases, and the decomposition efficiency of pollutants decreases. If the thickness is too thick, the transparency decreases.

  When forming the photocatalyst containing layer 7 using a silicone compound as a binder, for example, as an example, a coating composition comprising a hydrolyzate of an alkoxysilane such as organopolysiloxane or tetraethoxysilane and a titania sol. It can form by apply | coating and heating at 50 to 200 degreeC.

  As for the glass beads 6, quartz glass, soda-lime glass, borosilicate glass, lead glass, or the like formed into beads can be used, and the particle size is about 60 μm to 150 μm, and the refractive index is 1.8 to. About 2.0 is used.

  Further, by using the glass beads 6 colored in a color similar to the color of the surface of the pole body 4, the attractiveness can be improved while ensuring the retroreflectivity of the road marking body. And about the coloring method of the glass bead 6, you may mix the pigment of a predetermined color at the time of glass bead 6 shaping | molding, and after forming the transparent glass bead 6 after forming the transparent glass bead 6, You may form by coloring the photocatalyst content layer 7 formed in the surface.

  Further, the retroreflective layer 5 may be blended with a pigment or dye having a color similar to the color of the surface of the pole body 4 to enhance the attractiveness by enhancing the color of the road marking body. In addition, by coloring the retroreflective layer 5 in this manner, the attractiveness of the road marking body is improved, and the light is scattered from the side surfaces of the glass beads 6 to be exposed to the outside. It is preferable because light incident from the front surface of the glass beads 6 is scattered from the side surface side of the glass beads 6 and the road marking body appears white (a white floating phenomenon).

  The road marking body according to the present invention forms a retroreflective layer on the outer surface of a pole portion installed on a road surface via a base portion, and the retroreflective layer is retroreflected on a coating film made of a silicone resin paint. Since the glass beads having the property are dispersed and the photocatalyst-containing layer is formed on the surface of the glass beads, the pole portion can be formed by retrofitting the glass beads to the pole portion. Part can be retroreflective, even if dirt such as vehicle exhaust gas adheres to the surface of the glass beads, due to the action of the photocatalyst contained in the photocatalyst containing layer formed on the surface of the glass beads The dirt adhering to the surface of the glass beads can be decomposed and washed away with rainwater or the like, and can be suitably used as a road marking body that can maintain the retroreflectivity of the glass beads.

It is explanatory drawing which shows formation of the road marking body which concerns on this invention. (A) is sectional drawing which shows the AA cross section of FIG. 1, (b) is the partial expanded sectional view which shows the detail of (b), (c) is an expanded sectional view of a glass bead.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pole part 2 Cap part 3 Base part 4 Pole body 5 Retroreflective layer 6 Glass bead 7 Photocatalyst containing layer

Claims (2)

  A retroreflective layer is formed on the outer surface of the pole part installed on the road surface through the base part, and the retroreflective layer is formed by spraying retroreflective glass beads on a coating film made of a silicone resin-based paint. And the sign for roads characterized by the photocatalyst containing layer being formed in the surface of the said glass bead.   2. The road according to claim 1, wherein a photocatalyst-containing layer is formed in advance on the entire surface of the glass beads, and the glass beads are dispersed on a coating film made of a silicone resin paint to form a retroreflective layer. Marking object.