JP4191568B2 - Road marking body and method for manufacturing road marking body - Google Patents

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, and the like, and a method for manufacturing the same.

  Conventionally, as a technique for providing a covering layer for the purpose of preventing contamination or the like on a pole portion of a road marking body, for example, in Patent Document 1, in a retractable gaze guidance sign column having a hollow pole that bends when a vehicle contacts, Pole has an inner layer made of a polyurethane-based thermoplastic elastomer mixed with pigment, a reflective marker placed in a part of the surface of the inner layer, and a polyurethane-based thermoplastic elastomer, and is in close contact with the remaining region of the inner layer surface Because it consists of an outer layer, even if a vehicle touches the pole or steps on the pole, the reflective signage body will not be peeled off, cracked, scratched, etc., and the pole is washed with a dedicated washing machine Even if the brush hits only the outer surface of the outer layer, it does not cause separation, cracking, scratches, etc. on the reflective sign body, so that it can be folded. It has been disclosed.

JP-A-8-158319

  However, in the line-of-sight guide column as described in Patent Document 1, the formed outer layer only functions so as not to cause peeling, cracking, and scarring of the reflective marker, and has little effect on labor and cost of providing the outer layer. However, when the outer layer, particularly the reflective sign body is contaminated by stepping on the vehicle, the visibility is still lowered. In addition, the outer layer forming method shown in Patent Document 1 is a method in which an outer layer is coated on an outer layer molded inner layer pipe, and the retroreflection performance of the reflective marker may be impaired by the outer layer being formed. there were.

  The present invention has been made in view of the problems as described above, and impairs the retroreflective performance of a road sign body and a reflective sign body that can suppress a decrease in visibility due to pollution caused by stepping on a vehicle or the like. It is intended to provide a method for manufacturing a road marking body and a road marking body that can be retroreflective on the outside of the pole.

In order to solve the above problems, the present invention has the following configuration. That is, the road marking body according to the present invention is formed by attaching a cap and a base to both ends of a pole portion that bends and restores due to a vehicle collision formed using a flexible thermoplastic synthetic resin, A sign for roads in which glass beads are embedded at least outside the pole part, with at least a portion exposed outside the pole part, and a layer is formed by extruding a thermoplastic synthetic resin with an extruder. A two-layer extrusion molded body in which a layer forming a coating layer is formed is formed, and this two-layer extrusion molded body is formed into a spiral shape by a spiral molding machine, so that the coating layer is formed outside the pole. The cylindrical pole portion provided is formed, glass beads are sprayed on the surface of the coating layer in a softened state immediately after molding, and pressure is applied to the glass beads. Together is embedded Subizu the coating layer, is characterized in that the exposed outside pole portion at least a portion of the glass beads.

The glass beads are glass beads treated with an aminosilane coupling agent.

  Further, the pole portion is characterized in that a transparent coating layer having a refractive index approximate to that of glass beads is formed on the outer surface.

Further, the pole portion is characterized in that a boundary surface between the pole and the coating layer is a sawtooth discontinuous surface.

  The pole is characterized in that the color tone of the boundary surface with the coating layer is 60 or more in terms of L value.

  The covering layer is provided on the outside of the pole in a spiral line shape.

In addition, the road marking object manufacturing method according to the present invention is formed by attaching caps and bases to both ends of a pole portion which is bent and restored by a vehicle collision or the like formed using a flexible thermoplastic synthetic resin. In addition, at least a glass bead on the outside of the pole part is a method for producing a road marking body embedded at least partly exposed on the outside of the pole part, and the thermoplastic synthetic resin is extruded by an extruder, By forming a two-layer extruded body in which a layer forming a coating layer is formed on a layer forming a pole, and forming the two-layer extruded body into a spiral shape by a spiral molding machine, A cylindrical pole portion having a coating layer on the outside is formed, glass beads are sprayed on the surface of the coating layer in a softened state immediately after molding, and pressure is applied to the glass beads. And in, causes embedded the glass beads in the coating layer, is characterized in that the exposed outside pole portion at least a portion of the glass beads.

The road marking object manufacturing method according to the present invention is characterized in that a boundary surface between the pole and the coating layer is a sawtooth discontinuous surface by a mold used in the extruder.

According to the road marking object of the present invention as set forth in claim 1, the glass beads are partially exposed from the outer surface of the pole portion that is bent and restored in response to the stepping of the vehicle, etc., so that retroreflection is performed. by being embedded in, even if part of the pole portion is contaminated by such treading of the vehicle, can be in other parts suppress a decrease in visibility by retroreflectivity is retained, also claimed According to the invention of Item 2, since the glass beads are treated with the aminosilane coupling agent , the glass beads are firmly adhered to the pole portion, and the glass beads are not easily dropped even when an external force such as a vehicle collision is applied. , Visibility can be maintained over a long period of time.

According to the invention of claim 3 , by providing a transparent coating layer, it is possible to protect the glass beads from falling off and dirt without hindering the transmission of light, but the coating layer has a refractive index of glass beads. , It is preferable that the coating layer does not cause refraction of light different from the original glass beads, and the above-described effects can be obtained without impairing the retroreflectivity.

Further, according to the invention of claim 1 , the glass beads are embedded in the coating layer so that the glass beads can be adhered by the coating layer, and any material can be used for the pole, so that the material selection is free. The degree is preferably increased.

According to the road marking body of the present invention as set forth in claim 4, the functional material blended in the coating layer is formed by forming the boundary surface between the coating layer and the pole as a sawtooth discontinuous surface. The light emitted from the pole to the pole is reflected by the outer surface of the pole, but the reflected light is reflected by the sawtooth-like discontinuous surface, and an effect close to that of a prism can be obtained, and the light is retroreflected. And retroreflective performance can be improved.

  According to the invention of claim 5, it is preferable because the light reflectivity on the outer surface of the pole can be improved and the retroreflection performance can be further improved.

  According to the invention of claim 6, the coating layer is formed in a spiral line shape so that the glass pole or functional material is formed on the entire pole portion in order to improve the visibility as described above over the entire pole portion. The material can be saved without adding, and the design can be enhanced by the spiral line.

Moreover, according to the manufacturing method of the sign for roads concerning this invention of Claim 7, it is easy to embed glass beads reliably in a pole part by embedding glass beads in a pole part at the time of extrusion molding. Become. Further, the forming of the pole and the embedding of the glass beads can be performed at the same time, and the process for forming the pole portion can be simplified.

  According to the method for manufacturing a road marking object according to the present invention as set forth in claim 10, it is possible to increase the retroreflective performance by making the boundary surface between the pole and the coating layer into a serrated discontinuous surface. Since the molding can be performed using the mold, the process is not complicated, and the adhesion between the pole and the coating layer can be ensured.

BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment 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 sign using the above-mentioned pole. The pole portion 10 is a cylindrical hollow body, the insertion portion 201 of the cap 20 is inserted from the upper end, the reinforcing member 301 of the base 30 is inserted from the lower end, and the cap 20 and the base 30 are attached to the pole portion 10. . The cap 20 and the base 30 may be attached by adhesion, ultrasonic fusion, or the like, but it is preferable to perform rotary fusion so that a strong fusion can be achieved without noticeable fusion parts. For the cap 20, the insertion portion 201 and the inner surface of the pole portion 10 are in close contact with each other, and for the base 30, the lower end of the pole portion 10 is inserted into a mounting groove (not shown) provided in the base 30 and closely attached. Fusion is made by frictional heat at the part brought into close contact by rotating either one.

  Above the pole 10, the reflector R1 which is a reflection sheet is stuck at three places over the entire circumference of the pole 10 to improve visibility at night. In the present embodiment, the reflector R1 is attached to the pole 10 before the fusion, but may be attached after the fusion. Further, a reflector R2 in which glass beads are embedded is also wound around the base 30 to further improve visibility at night.

  FIG. 2 shows details of the road marking body shown in FIG. 1. A) is a cross-sectional view showing the AA cross section of FIG. 1, B) is a cross-sectional view showing further details of A), and C). FIG. 3 is a cross-sectional view showing details of glass beads. In (b), the pole part 10 is a cylindrical hollow body. In (b), the pole part 10 is exposed on the surface of the pole 1 made of polyurethane resin, and at least a portion of the glass beads 2 is exposed outside the pole part. By being embedded, the glass beads 2 are fixed to the outer surface of the pole 1, and the retroreflective property is exhibited, and the pole part 10 can be retroreflective. The glass bead 2 has a coating portion 22 formed by treating the core portion 21 with an aminosilane coupling agent as shown in (c). The coating portion 22 improves the adhesion between the glass bead 2 and the pole 1. The glass beads 2 are more firmly fixed to the pole 1.

  The material for forming the pole 1 is preferably a polyurethane resin that is relatively easy to mold and has high resilience and durability against collision and stepping of the vehicle, but is not particularly limited. Any material that can form a bent and reconstructed pole may be used, and a thermoplastic soft polyolefin that is a thermoplastic synthetic resin having high ease of molding, resilience, and durability, and various elastomers such as polyolefin and styrene are used. be able to. Similarly, a thermoplastic synthetic resin excellent in ease of molding, resilience, durability, and the like can be suitably used for the material used for forming the cap 20 and the base 30, but is not particularly limited and is appropriately selected. The materials may be used. In addition, in integrating with the pole portion 10 by fusion, it is preferable to use a material having compatibility with that used for forming the pole 10, and if the same type is used, resistance to external force and temperature change is used. It can be increased and is more preferable.

  As for the glass beads 2, the beads forming the core portion 21 can be made of quartz glass, soda-lime glass, borosilicate glass, lead glass, or the like formed into beads, and the particle size thereof is about 10 to 500 μm. Those are preferred. As the aminosilane coupling agent, known and commonly used agents such as trimethylmethoxysilane, trimethylethoxysilane, vinyltrichlorosilane, and vinyltriethoxysilane may be used.

  After the glass beads 2 are fixed on the surface of the pole 1, a transparent coating layer 6 may be formed on the outer surface of the pole portion using a fluorine-based paint as shown in FIG. The coating layer 6 is transparent and thin, and approximates the refractive index of the glass bead 2 so that it does not interfere with normal light entering and exiting the glass bead 2 and is retroreflective. There is no loss of sex. General-purpose glass beads have a refractive index of about 1.90 to 2.00, and are not limited to fluorine-based coatings as long as the refractive index approximates the refractive index when a coating film is formed. It is preferable that the thickness be about 1 μm to 1.0 μm without damaging the outer shape of the glass beads.

  FIG. 4 is an explanatory view showing an example of a method for manufacturing the road marking object according to the present invention as shown in FIGS. 1 and 2. The pole 1 is sent in the direction of the arrow Y2 while being rotated in the direction of the arrow Y1, and the vicinity of the surface is softened by passing through the residual heat generator N. The glass beads 2 adhere to the pole 1 because the glass beads 2 are sprayed from the hopper H provided at the upper side to the pole 1 coming out of the residual heat machine N, and the pole 1 is softened. The adhering glass beads 2 are bitten into the pole 1 by appropriately applying pressure by the roller R, and at least a part thereof is exposed to the outside of the pole portion and is embedded in the pole 1.

  5 to 7 show other examples of the method for manufacturing a road marking body according to the present invention. FIG. 5 is a plan view showing a molding process and apparatus, and FIG. 6 is a cross-sectional view showing an extruded molded body. FIG. 7 and FIG. 7 are cross-sectional views showing the embedded state of glass beads. In FIG. 5, a thermoplastic synthetic resin is extruded by an extruder E, and an extrusion molded body S forming a pole is discharged from an extrusion die D. The extrusion molded body S is spirally cylindrically formed by a spiral molding machine F. Thus, the pole 1 which is a cylindrical hollow body is formed. The pole 1 is configured such that glass beads are sprayed from the hopper H while the vicinity of the surface immediately after molding is softened, and an appropriate pressure is applied by the roller R. Thereafter, it is cooled by the cooler C, and then the cap and the base can be attached by annealing or cutting.

  6 is a cross-sectional view taken along the line BB in FIG. The extrusion molded body S has a parallelogram cross section having a high inclination, so that the adhesion area of the extrusion molded bodies S by superposition is increased and the integrity of the pole 1 after molding is increased. ing. In addition, by using a two-layer mold in extrusion molding, for example, a coating layer 3 made of a polyurethane resin is formed as an upper layer on the outside of the pole 1 made of a polyolefin-based elastomer. The compatibility is high and the two layers are integrated and not separated at the time of extrusion. Further, since the polyurethane resin forming the coating layer 3 is a material having a high compatibility with the aminosilane coupling agent and a low softening point as compared with the polyolefin-based elastomer, the polyurethane resin is embedded and more than the case where the glass beads are directly attached to the pole 1. It is easy to fix.

  The glass beads are embedded in the coating layer 3 by a method as shown in FIG. The glass beads 2 are sprayed from the hopper H onto the softened coating layer 3 immediately after molding, and the coating layer 3 is in a softened state, so that it is easily attached without using any adhesive means. The glass beads 2 attached to the surface of the coating layer 3 further bite into the coating layer 3 by applying appropriate pressure by the roller R while the coating layer 3 is softened, and at least a part thereof is exposed to the outside of the pole portion. Then, the pole portion 10 is formed by being embedded in the coating layer 3. In addition, functional materials such as glass powder, metal powder, fluorescent material, phosphorescent material, and photocatalyst fine particles are blended in the coating layer 3 at the time of forming the extruded molded body S. Each function may be provided on the surface by the functional material.

  By setting the thickness of the pole 1 and the coating layer 3 by such spiral molding, it becomes possible easily by adjusting the extrusion die in the extrusion die D, and any pole 1 and coating layer 3 depending on the installation situation and application. It is easy to obtain a road marking body having a thickness of 5 mm. In addition, the number of layers and thickness of the pole 1 and coating layer 3 can be set flexibly by adding more extruders E or by using a plurality of extrusion dies in the extrusion die D. It becomes.

FIG. 8 is a cross-sectional view showing a reference example of a method for manufacturing a road marking body. 3) is a cross section from the same viewpoint as that shown in FIG. 3, but a coating layer 3 is formed on the outside of the pole 1, and glass beads 2 are blended in the coating layer 3 and molded. In the state shown in (a), the glass beads 2 are buried, and even if the coating layer 3 is translucent, it is difficult to obtain retroreflectivity. By removing the coating layer 3 to about the C-C line, a part of the blended glass beads is exposed to the outside of the coating layer 3 and a retroreflective property is developed. In order to remove the coating layer 3, the coating layer 3 may be physically removed by sanding or the like, or may be chemically removed using a solvent or the like that dissolves the coating layer 3. You may combine.

  9 and 10 show another embodiment of a road marking body according to the present invention. FIG. 9 is a cross-sectional view of an extruded body, and FIG. 8 is a front view of an installed road marking body. is there. Similar to the cross-sectional view shown in FIG. 6, the extruded molded body S forms a pole by spiral molding, but the coating layer 3 that is the upper layer of the pole 1 is provided only on a part of the outside of the pole 1. Glass beads are embedded in the coating layer 3, or functional materials such as glass powder, metal powder, fluorescent material, phosphorescent material, and photocatalyst fine particles are blended.

  The road marking body shown in FIG. 10 is formed by attaching the cap 20 and the base 30 to the pole portion 10 formed by the extruded body S as shown in FIG. The coating layer 3 is provided in a spiral line shape on the outer surface of the road marking body, and the pole 1 appears on the remaining outer surface. By providing the covering layer 3 on a part of the outside of the pole 1, various functions of glass beads and functional materials can be expressed over the entire pole portion 10 without providing the covering layer 3 as a whole. The material used for forming the coating layer 3, glass beads, and functional materials to be blended can be saved, leading to a reduction in cost. Furthermore, a spiral pattern is clearly expressed in the pole portion 10, and the design It can be excellent in properties.

  FIG. 11 shows still another embodiment of a road marking object according to the present invention. (A) is a cross-sectional view of a pole portion, (b) is a detailed cross-sectional view, and (c) is a detailed light reflection. It is sectional drawing shown. 2) is a cross-sectional view from the same point of view as in FIG. 2A, and FIG. 2B is the details thereof. In FIG. 2, the outer side of the pole 1 is made of a translucent polyurethane resin and a fluorescent phosphorescent substance. A coating layer 3 in which a certain functional substance is blended is provided on the entire surface, and a serrated discontinuous surface 4 is formed between the pole 1 and the coating layer 3. By the sawtooth discontinuous surface 4, the light L1 emitted from the functional material 5 to the pole 1 side is reflected by the sawtooth discontinuous surface 4 as in the case of using a prism as shown in FIG. Light L2 by retroreflection can be emitted with higher efficiency than the surface, and visibility can be improved.

  Here, the pole 1 has a color tone at the boundary surface with the coating layer 3 of 60 or more in terms of L value, so that the light L1 emitted from the functional substance 5 to the pole 1 side can be reflected more efficiently. Can do. In order to set the color tone of the boundary surface with the coating layer 3 to 60 or more in the L value, a pigment of white, yellow, or a color tone close to that of the pole 1 is blended and molded simultaneously with the coating layer 3, or the outer surface is temporarily formed. The outer surface of the pole 1 formed as a sawtooth-like discontinuous surface may be colored by painting or the like.

  The pole portion 10 having the serrated discontinuous surface 4 as shown in FIG. 11 may be formed by two-layer extrusion molding or coating molding, but may be molded by spiral molding. FIG. 12 shows a cross section of an extrusion molded body S that performs spiral molding, and is a cross sectional view at the same viewpoint as FIG. 6, but the sawtooth-like discontinuous surface 4 is formed by the extrusion molded body S as shown in FIG. By doing so, it is not necessary to process the extrusion die into a saw-tooth shape for the entire cross section of the pole portion 10, and the work necessary for processing the extrusion die can be reduced. In addition, as shown in (b), if the coating layer 3 and the sawtooth discontinuous surface 4 are provided on a part of the outside of the pole 1, the entire pole portion 10 can be provided with a phosphorescent property, although it is blended. The fluorescent phosphorescent material to be saved can be saved, leading to a reduction in cost, and the work necessary for the processing of the extrusion die can be further reduced by making the sawtooth shape part of the cross section.

  The functional substance 5 is at least one selected from the group consisting of a fluorescent material, a phosphorescent material, and a light reflecting material, and emits light by itself or has high reflectivity of incident light. The fluorescent material and the phosphorescent material are not particularly limited, and known materials may be used, and fine particles having these properties may be blended into the coating layer 3 and molded. The light-reflecting material is glass beads, glass powder, metal powder, etc., and mainly reflects the incident light retroreflectingly. That's fine.

It is explanatory drawing which shows formation of the road marking body concerning this invention. It is sectional drawing which shows the detail of the cross section of the road marking body shown in FIG. It is sectional drawing which shows one Embodiment of the sign body for roads concerning this invention. It is explanatory drawing which shows an example of the manufacturing method of the road marking body concerning this invention. It is explanatory drawing which shows the other example of the manufacturing method of the marking object for roads concerning this invention. It is BB sectional drawing of FIG. It is sectional drawing which shows the detail of embedding of the glass bead in FIG. It is sectional drawing which shows the reference example of the manufacturing method of the sign for roads. It is explanatory drawing which shows the further another example of the manufacturing method of the road marking body concerning this invention. It is a front view which shows other embodiment of the sign for roads concerning this invention. It is sectional drawing which shows other embodiment of the road marking body concerning this invention. It is sectional drawing explaining an example of the formation method of the road marking body shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pole 2 Glass bead 3 Coating layer 4 Sawtooth-like discontinuous surface 5 Functional substance 6 Transparent coating layer 10 Pole part 20 Cap 30 Base

Claims (9)

Caps and bases are attached to both ends of a pole portion that is bent and restored by a vehicle collision or the like formed using a flexible thermoplastic synthetic resin , and at least glass beads are provided at least outside the pole portion. A sign for a road that is embedded with a part exposed to the outside of the pole part, and a layer that forms a coating layer is formed on the layer that forms the pole by extruding a thermoplastic synthetic resin with an extruder. A two-layer extrusion molded body is formed, and the two-layer extrusion molded body is formed into a spiral shape by a spiral molding machine to form a cylindrical pole portion having a coating layer on the outside of the pole. , By spreading glass beads on the surface of the coating layer in a softened state immediately after molding, and applying pressure to the glass beads to embed the glass beads in the coating layer, and Road marking material, characterized in that at least a portion exposed to the outside of the pole portion of Rasubizu. The said glass bead is a glass bead processed with the aminosilane coupling agent, The sign for roads of Claim 1 characterized by the above-mentioned. The road marking body according to claim 1 or 2, wherein a transparent coating layer having a refractive index similar to that of glass beads is formed on the outer surface of the pole portion. The road marking body according to any one of claims 1 to 3, wherein a boundary surface between the pole and the coating layer is a sawtooth discontinuous surface in the pole portion. 5. The road marking body according to claim 4 , wherein a color tone of an interface between the pole and the covering layer is 60 or more in terms of an L value. The road marking body according to any one of claims 1 to 5, wherein the covering layer is provided on the outside of the pole in a spiral line shape. Caps and bases are attached to both ends of a pole portion that is bent and restored by a vehicle collision or the like formed using a flexible thermoplastic synthetic resin, and at least glass beads are provided at least outside the pole portion. A method for producing a road marking body, a part of which is exposed outside a pole portion, wherein a thermoplastic synthetic resin is extruded by an extruder and a coating layer is formed on a layer forming a pole Forming a two-layer extrusion molded body and forming the two-layer extrusion molded body into a spiral shape by a spiral molding machine, thereby forming a cylindrical pole portion provided with a coating layer on the outside of the pole. The glass beads are embedded in the coating layer by forming and spreading glass beads on the surface of the coating layer in a softened state immediately after molding, and applying pressure to the glass beads. Both manufacturing method of road marking material, characterized in that exposed to the outside of the pole portion at least a portion of the glass beads. The road marking object manufacturing method according to claim 7, wherein a boundary surface between the pole and the coating layer is a sawtooth discontinuous surface by a mold used in the extruder. Caps and bases are attached to both ends of a pole part that is bent and restored by a vehicle collision or the like formed using a flexible thermoplastic synthetic resin, and at least a part of the glass beads are attached to the outside of the pole part. The pole portion is provided with a retroreflective property so as to be exposed outside the portion, and a reflection sheet is provided over the entire circumference of the pole portion above the pole portion provided with the retroreflective property. Further, a road marking body characterized by being attached.

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