JP2018180504A - Road surface light reflection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light reflection device having high intensity, excellent in wear resistance and weather resistance, and having high light reflection luminance.SOLUTION: A road surface light reflection device comprises a light transmission body 1 and a reflection layer 13. The light transmission body 1 is formed of a reinforced transparent material, and is formed of a proximal part 10 and a salient part 11. The salient part 11 and the proximal part 10 are integrally molded, and the salient part 11 is formed on an upper surface of the proximal part 10. An apex of the proximal part 10 surrounds an area which is larger than an area surrounded by bottom sides of the salient part 11. A shape of the salient part 11 is formed into an elliptical arc surface in an incident direction of a light ray from a light source. The reflection layer 13 is installed on the exterior side of the proximal part 10 of the light transmission body 1, and the light ray emitted from the light source A is transmitted in the salient part 11 of the light transmission body 1 and then enters the light transmission body 1, then is reflected through the reflection layer 13, then is emitted to a direction of the light source from the light transmission body 1 again.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a road surface light reflecting device, and more particularly to a road surface light reflecting device which is excellent in high strength, wear resistance, weather resistance and high light reflection luminance.

  The light reflection device is a necessary safety facility for partition and warning of the road, and the function of light reflection is to alert the driver about the road condition and course, and the impact on traffic safety is enormous. A road light reflection device installed on the road surface prevents a traffic accident by notifying the driver of the progress of the vehicle with reflected light. Conventional projecting road markers (plastic reflectors made of plastic or aluminum alloy shell) have low strength, are easily broken, are easy to wear, are prone to buildup of dust, are easy to fall off, and their life is very short. It was necessary to do the repair maintenance for a large amount of cost each time. Furthermore, the corner of the outer shell often breaks through the tire and causes an accident etc., which is a huge burden on manpower and cost of the Road Maintenance Division, and the quality of the road can not be improved, and the traffic safety is also permanent guarantee. I can not get it.

  Further, the conventional 360 degree road surface light reflecting device 4 as shown in FIG. 11 has the advantages of high strength, excellent wear resistance, weather resistance and the like and being hard to age. The arc convex portion has a light reflecting function and can reflect light in a plane of 360 degrees, but the conventional 360 degree road surface light reflecting device 4 has a drawback that the light reflection luminance is insufficient.

  From the above, a light reflecting device having high strength, excellent in abrasion resistance, weather resistance, and high light reflection luminance is a pressing issue in this field.

  Therefore, an object of the present invention is to provide a light reflecting device having high strength, excellent in abrasion resistance, weather resistance and high light reflection luminance.

  One embodiment is a road surface light reflector, which includes a light transmissive body and a reflective layer. The light transmitting body is made of a reinforced transparent material and includes a base and a protrusion. The projection and the base are integrally molded, and the projection is formed on the upper surface of the base. The bottom area enclosed by the top of the base is greater than the area enclosed by the bottom of the ridge. The shape in the incident direction of the light beam from the light source at the bottom of the convex portion is not a circle but an arc of an ellipse. The reflective layer is disposed on the outer surface of the base of the light transmission main body, so that the light beam emitted from the light source enters the light transmission main body from the convex portion of the light transmission main body, is reflected by the reflection layer, and is transmitted again. Is emitted from the light source toward the light source.

  Another object of the present invention is to provide a road surface light reflecting device that is not easily damaged.

  In another embodiment, the road surface light reflecting device further includes a base having a groove on the upper surface, the base having two guides extending in parallel along the incident direction of the light beam, A light transmissive body is disposed in the recess.

  The light transmitting main body of the road surface light reflecting device according to the present invention reflects the reflected light, while the conventional 360 degree road surface light reflecting device 4 can obtain uniform reflection luminance within the horizontal 360 degree observation range. The incident light direction (the direction of the arrow on the sign) is concentrated within the range of the horizontal effective reflection angle with the central axis of 0 degrees to significantly improve the reflection luminance. According to the road surface light reflecting device of the present invention, at the time of manufacture, when the horizontal effective reflection angle decreases, the concentration effect of the reflected light is better, that is, the smaller the horizontal effective reflection angle, the higher the reflection brightness. Conversely, the greater the horizontal effective reflection angle, the lower the reflected brightness.

  The objects, technical contents, features, and effects to be achieved of the present invention will be described in detail with reference to specific examples and drawings.

It is a schematic diagram of the three-dimensional structure of the road surface light reflection apparatus which is an Example of this invention, and represents the upper surface of a road surface light reflection apparatus. BRIEF DESCRIPTION OF THE DRAWINGS The bird's-eye view of the road surface light reflection apparatus which is an Example of this invention. FIG. 7 is an overhead view of a road surface light reflecting device according to another embodiment of the present invention. It is a schematic diagram of the three-dimensional structure of the road surface light reflection apparatus which is an Example of this invention, and represents the lower surface of a road surface light reflection apparatus. BRIEF DESCRIPTION OF THE DRAWINGS Side surface sectional drawing of the road surface light reflection apparatus which is the Example of this invention. FIG. 7 is a schematic view of a three-dimensional structure of a road surface light reflecting device according to another embodiment of the present invention, which represents the upper surface of the road surface light reflecting device. It is side surface sectional drawing of the road surface light reflection apparatus which is an Example of this invention, and represents the light ray reflection inside a road surface light reflection apparatus. FIG. 6 is a schematic view of a three-dimensional structure of a road surface light reflecting device, which is another embodiment of the present invention, and represents the upper surface of the road surface light reflecting device. FIG. 6 is a schematic view of another embodiment of the present invention and showing a three-dimensional structure of two assembled road surface light reflectors. It is a schematic diagram of the measuring apparatus of the light reflection intensity of the road surface light reflection apparatus which is an Example of this invention. FIG. 5 is a comparison line diagram of the light reflection intensity measurement data of the road surface light reflection device of the embodiment of the present invention and the conventional 360 degree road surface light reflection device. The schematic of the three-dimensional structure of the conventional 360 degree road surface light reflection apparatus.

  Referring to FIGS. 1 to 4, the road surface light reflecting device includes a light transmitting body 1 and a reflecting layer 13. The light transmitting main body 1 is made of a reinforced transparent material and includes a base 10 and a convex portion 11. The protrusion 11 is disposed on the upper surface of the base 10 so that the area surrounded by the top of the base 10 is larger than the area surrounded by the bottom of the protrusion 11. The base 10 and the projection 11 are integrally formed, and the projection 11 has a major axis aa 'and a minor axis bb', and the major axis aa 'direction is the incident direction of the light beam of a light source (for example, a car). The shape of the base of 11 is not a circle but an arc 11e of an ellipse in the direction of the major axis aa '.

  The convex portion 11 is raised in a vault shape, that is, in an arc shape. Alternatively, the convex portion 11 may be in the form of a vault on which the top is placed, that is, the surface of the top is flat. That is, the convex portion 11 has a hemispherical shape or a flat shape. It should be noted that the shape of the protrusion 11 is not limited to this.

  Referring to 1 of FIG. 2, it is preferable that the base of the convex portion 11 be elliptical or substantially elliptical and have a major axis aa 'and a minor axis bb' when the convex portion 11 is viewed from above. The ratio of the minor axis bb 'to the major axis aa' is 0.5 to 0.99, more preferably 0.7 to 0.99, still more preferably 0.9 to 0.99.

  Here, it should be noted that the shape of the convex portion 11 is not necessarily limited to the length of the major axis and the minor axis. The main concept of the present invention is to improve the bottom portion of the light incident surface of the convex portion 11 into an elliptical shape to achieve the effect of increasing the directivity of the reflected light, whereby the user in the same direction as the light source Can increase the brightness of light rays that the road surface light reflector senses. In another embodiment as shown in FIG. 2-2, the length in the minor axis bb ′ direction is intentionally increased to exceed the length in the major axis aa ′ direction. It is in the range which an invention wants to include.

  Referring to FIGS. 2-1, in a more preferred embodiment, the outline of the convex portion 11 is a half-divided capsule. The upper and lower sides of the middle portion of the capsule bottom are rectangular, and the left and right sides of the bottom are semi-elliptical. It should be noted that the rectangles and semi-elliptical shapes do not necessarily have to be perfect rectangles and perfect semi-elliptic shapes. For example, the bottom of the side surface 11 f located on the minor axis direction of the convex portion 11 may be straight or substantially curved.

  In one embodiment, adjusting the shape of the side surface 11 f of the convex portion 11 determines the directivity of the road surface light reflecting device. For example, when the base of the side surface 11f is straight, the directionality of the reflected light is stronger, and most of the light is reflected toward the light source, so it can be used for straight roads such as expressways. When the base of the side surface 11f is a curved line, the directivity of the reflected light is weaker, and only a part of the light is reflected toward the light source, and the other part of the light is reflected toward the side. It can be used for curved roads etc.

  The major axis direction of the convex portion 11 is set to coincide with the light ray incident direction, the base of the convex portion 11 in the light ray incident axis direction is changed to an arc, and a light ray is made incident through the convex portion 11. After entering the light transmitting body 1, the ratio of light reflected back to the light incident axis is increased.

  In one embodiment, when the upper surface and the side surface 11f of the convex portion 11 are added with a pattern or a small protrusion as needed, the frictional force is increased to achieve the antislip effect, which is useful for the construction of the road surface light reflection device it can. Specifically, conventional circular top road light reflective signs are difficult to install because they are inconvenient for gripping. In the mounting process of the road surface light reflecting device of the present embodiment, the builder grasps the side face 11f having frictional force to increase the controllability of the road surface light reflecting device, and increases the localization accuracy of the direction identification mark 101. Thus, the mounting quality of the road surface light reflecting device can be improved, and the reflection intensity of the reflected light can be increased.

  The area of the upper surface of the base 10 is larger than the area of the lower surface, that is, the base 10 is in the shape of an inverted truncated cone. It should be noted that the shape of the base 10 and the convex portion 11 of the light transmitting main body 1 can be aspheric by an optical design, or the shape can be corrected by manufacturing and installation. The depiction of shapes in the text is for the purpose of better understanding and is not of course strictly limited.

  In the mounting process of the surface light reflecting device, after a hole is drilled in the road surface, the road surface light reflecting device is installed in the drill hole, and then an adhesive is added and fixed. In the process of mounting the road surface light reflecting device, the upper surface of the base 10 may be designed to be circular according to the construction, as shown in FIG. Absent. In one embodiment, one of the axes on the incident direction of the incident light beam may be defined as the optical axis of the base, and one axis corresponding to the optical axis may be defined as the lateral axis of the base. The ratio of the side axis to the optical axis is 0.8 to 1.2, more preferably 0.9 to 1.1. Referring to FIGS. 1 and 2-1 and 2-2, in one embodiment, the top side of the base 10 may be designed to have different shapes according to the necessity of optical reflection and refraction of the convex portion 11. Good. In the embodiment where the top side of the base 10 is not circular, the road surface light reflecting device further includes a cylindrical lid (not shown) for covering the light transmitting body 1 for convenience of construction. Since the top side of the base 10 and the bottom side of the projection 11 are placed on the ground, the projection 11 is usually higher than the ground and the base 10 is lower than the ground after the road surface light reflection device is mounted.

  In one embodiment, the upper surface of the base 10 achieves a non-slip effect by adding patterns or small protrusions as needed to increase the frictional force.

  In another embodiment, the direction identification mark 101 indicating the incident axis can be placed on the upper surface of the base 10. Commonly used direction identification indicators 101 include patterns (arrows, etc.), letters, numbers, symbols, and the like.

  Referring to FIG. 3, in one embodiment, the base 10 has a recess 12 to increase the cooling rate during the manufacturing process of the road surface reflector, to improve the overall strength and to increase the specific surface area of the road surface light reflector. Do. Since the overall strength of the road surface light reflecting device is improved, the road surface light reflecting device has better formality and is less susceptible to deformation.

  In a more preferred embodiment, the recess 12 comprises one or more step annular structures 121. The stepped annular structure 121 reflects the refracted light beam at the light reflecting surface. The number of the step annular structure 121 shown in FIG. 3 is only used for explanation and is not limited to this. The user can increase or decrease the number of step annular structures 121 depending on the situation.

  The light transmitting body 1 is made of a reinforced transparent material, and the reinforced transparent material is, for example, glass, polycarbonate (PC), or polymethyl methacrylate (acrylic). The material of the light transmission body 1 is preferably tempered glass. In addition, if the overall strength is increased by increasing the cooling rate in the manufacturing process of the light transmitting main body 1, the shape becomes more preferable with less deformability. In addition, pigments are added as necessary to obtain light transmitting bodies 1 of different colors.

  Referring to FIGS. 1 and 6, the light transmitting body 1 is installed in a road, and the reflective layer 13 is an outer wall of the base 10, the lower surface of the base 10 and the recess 12 or the step ring of the light transmitting body 1. The light transmission body is installed on the outer surface of the base 10 including the outer wall surface of the structure 121 and the like, and the light beam emitted from the light source is incident through the convex portion 11 of the light transmission body 1 and reflected by the reflection layer 13. The light is emitted toward the direction of the light source through 1. Further, referring to FIG. 6, the recess 12 also has a light reflecting function, whereby the light beam projected from the outside is refracted to the recess 12 at the bottom by the light reflecting surface, and the light beam is reflected from the recess 12 further. To increase the light reflection effect of the road surface light reflector.

  What is desired to be described is that the angle and distance between the light incident surface of the convex portion 11 and the reflective layer 13 and the shape of the convex portion 11 can be adjusted by the material of the light transmitting main body 1. Specifically, it can be adjusted by selecting the refractive index of the material of the light transmitting body 1, the refractive index of glass is about 1.52, the refractive index of polycarbonate is about 1.58, and the refractive index of polymethyl methacrylate is about 1. 48.

  In one embodiment, the color of the roadway reflector can be adjusted as needed. For example, the road surface light reflection device is embedded in a one-way road to make the reflected light in the passing direction white, and when passing in the reverse direction, the reflected light is red to indicate that it is not passing. The implementation of the road surface light reflection device is by placing thin red transparent glass (or translucent dyed film) in half of the transparent main body base, without staining the other half, and after spraying the aluminum alloy reflective layer, the product Half is red and half is white. Also, other color combinations of the road surface light reflector are, for example, half red, half yellow, half yellow, half white, or half red, half yellow.

  FIG. 6 is a simple explanation of the light ray reflection path of the road surface light reflecting device, and after the parallel luminous flux from the car roof enters the upper surface and the convex portion 11 of the base 10 of the road surface light reflecting device, The light is collected on the reflection layer 13 and is reflected on the top of the road surface light reflecting device, and finally it becomes parallel light flux and returns to the driver's eyes. When observed from the road surface light reflector, there is one small angle of depression between the vehicle and the driver's eye, and the further the vehicle is to the light reflector (100m, 200m, etc.), the smaller the angle of depression (normal measurement) Standard approximately 0.4 degrees), the closer the vehicle to the light reflecting device, the larger the depression angle (normal measurement standard is approximately 2 degrees). The change of the depression angle is the subject matter of the present invention and does not deviate from the scope of the present invention.

  In contrast to the effect that the conventional 360 degree road surface light reflecting device 4 can obtain uniform reflection luminance within the horizontal 360 degree observation range, the light transmitting main body 1 of the road surface light reflecting device of the present invention The reflection brightness is greatly improved by concentrating the incident light direction (the arrow direction on the sign) in the range of the horizontal effective reflection angle with the central axis of 0 degrees. According to the road surface light reflecting device of the present invention, at the time of manufacture, when the horizontal effective reflection angle decreases, the concentration effect of the reflected light is better, that is, the smaller the horizontal effective reflection angle, the higher the reflection brightness. Conversely, the greater the horizontal effective reflection angle, the lower the reflected brightness. The value of the end point of the range of the horizontal effective reflection angle whose central axis at 0 degree is the central light axis of the incident light direction (arrow direction on the sign) on the roadway can be designed as ± 20 ° to ± 2 °, for example, ± 20 °, ± 15 °, ± 10 °, ± 5 °, ± 2 °. In one example, setting the end point value of the range of the horizontal effective reflection angle to ± 20 ° provides a general-purpose road surface light reflecting device, which provides a larger range of the horizontal effective reflection angle, and The reflected brightness in the range is higher or closer than the reflected brightness of the conventional 360 degree road surface light reflecting device 4. In another example, setting the end point value of the horizontal effective reflection angle range to ± 5 ° results in a brightness-enhanced road surface light reflector, which has a smaller horizontal effective reflection angle range but significantly more reflected luminance. It is suitable for straight roads such as expressways to improve.

  In the above embodiment, the reflection brightness of the road surface light reflection device was measured based on the Chinese national standard CNS 13762. As shown in FIG. 9, the measuring apparatus includes a light source A having a projection aperture of 26 mm or less and a photoelectric receiver B having an effective detection diameter of 26 or less. Assuming that the distance between the lens surface of the photoelectric receiver B and the center point of the sample C is d, it is necessary to adjust to 15.0 m or more. The light source A adopts a CIE standard light source (light color of color temperature 2856 K) and is based on the relative luminosity of the standard observer in principle. Besides this, the incident light sensitivity projected onto the central point of the sample C should also be as uniform as possible. In the measurement process, the incident angle is set to 0.5 ° and the corresponding observation angle is set to 0.4 °. At the time of measurement, first, the lens surface of the photoelectric receiver B is placed toward the light source A at the position of the center point of the sample C shown in FIG.

  As shown in FIG. 5, for convenience of measurement of reflection luminance, the road surface light reflecting device in the embodiment is made of acrylic having a refractive index of 1.48, and the acrylic having a refractive index of 1.48 is conventionally 360 degrees. Instead of the road surface light reflection device 4 (generally made of tempered glass having a refractive index of 1.52), measurement comparison is performed. The obtained brightness values are as shown in FIG. 10, and each horizontal reflection angle of the conventional 360 ° light reflecting device shows an effect of uniform reflection brightness (102 to 120 MCD / LX), whereas Within the range of the horizontal effective reflection angle of the inventive road surface light reflecting device, the effect of concentrating the reflected light is obtained, so that the reflected brightness of the 0 degree central axis reaches 315 MCD / LX, and the conventional 360 degree road surface light reflecting device 4 The reflection brightness (80 to 86 MCD / LX) similar to that of the conventional 360 degree road surface light reflection device 4 was obtained even when the reflection brightness (105 MCD / LX) of the above was far higher than that of .

  Another object of the invention is to provide a light reflecting device that is not easily damaged. As shown in FIG. 7, in one embodiment, the road surface light reflecting device further includes a base 2 having a recessed groove 22 on the upper surface, said base 2 being a pair of guides extending parallel to the incident direction of the light beam. 21a and 21b. The light transmitting main body 1 is installed in the recessed groove 22. The recessed groove 22 is disposed in the recessed arc 26, and the vertex height of the convex portion 11 of the light transmitting main body 1 becomes substantially lower than the vertex of the upper surface of the base 2. Therefore, the road surface light reflecting device is not easily damaged and the life is long It has a more preferable reflection effect.

  In one embodiment, the base 2 may be mounted in a snowy area, and the guides 21a and 21b may substantially protrude from the surface of the snowy area, and slopes 24 may be provided at both ends of the guides 21a and 21b A step 25 is provided below 21a and 21b, and when the snow removal vehicle passes through the base 2 in the snow removal operation, the snow removal vehicle slides smoothly on the guides 21a and 21b using the slope 24 and the direct light transmission main body 1 Since the convex portion 11 is not damaged, the road surface light reflecting device is not easily damaged.

  Referring to FIG. 8, the number of grooves 22 and the light transmission body 1 is not limited. In a more preferred embodiment, the base 2 further comprises at least one rib 23, the base 2 being provided with a plurality of grooves 22 which are located between the ribs 23 and the guides 21a, 21b, The light transmitting main body 1 is installed corresponding to the recessed groove 22. The number of ribs 23 or grooves 22 may be further increased to further increase the reflection brightness by housing more light transmission bodies 1.

  As mentioned above, although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes within the scope of the present invention. Also included in the present invention.

DESCRIPTION OF SYMBOLS 1 light transmission main part 10 base 12 concave part 121 step ring structure 101 direction identification mark 11 convex part 11 e elliptical arc 11 f side 13 reflective layer 2 base 21 a guide 21 b guide 22 recessed groove 23 rib 24 slope 25 stepped 26 recessed arc 4 360 Degree Road surface light reflection device aa 'Long axis bb' Short axis A Light source B Photoelectric receiver C Sample d Distance

Claims (16)

A light transmitting body made of a reinforced transparent material, including a base, and a projection integrally formed with the base and installed on the upper surface of the base;
And a reflective layer disposed on the outer surface of the base,
The area surrounded by the top of the base is larger than the area surrounded by the bottom of the protrusion, and the shape of the bottom of the protrusion is an arc of an ellipse in the incident direction of light emitted from the light source,
The light beam enters the light transmitting body through the convex portion, is reflected by the reflective layer, and then is emitted toward the light source through the light transmitting body. apparatus. The road surface light reflecting device according to claim 1, wherein the convex portion has a major axis and a minor axis, and the direction of the major axis coincides with the incident direction of the light beam. The road surface light reflecting device according to claim 2, wherein a ratio of a length of the short axis to a length of the long axis is 0.5 to 0.99. The road surface light reflecting device according to claim 1, wherein a topmost surface of the convex portion is a flat surface. The road surface light reflecting device according to claim 1, wherein a material of the light transmitting main body is tempered glass. The road surface light reflecting device according to claim 1, wherein a material of the light transmitting body is polycarbonate, polyurethane or polymethyl methacrylate. The road surface light reflecting device according to claim 1, wherein the convex portion has a semi-capsule outer shape. The road surface light reflecting device according to claim 1, wherein the base has an outer shape of an inverted truncated cone. The road surface light reflecting device according to claim 1, further comprising a recessed portion on a lower surface of the base. The road surface light reflecting device according to claim 9, wherein the recessed portion has a plurality of step ring structures. The road surface light reflecting device according to claim 1, further comprising: a direction identification mark indicating an incident direction of the light beam on an upper surface of the base. The road surface light reflection according to claim 1, wherein at least one of the upper surface of the base, the upper surface of the convex portion, and the side surface of the convex portion has a pattern or a small protrusion to increase the frictional force. apparatus. It is characterized in that it comprises two guides having a recess on the upper surface and extending parallel to the incident direction of the light beam, and the light transmitting body further comprises a base installed in the recess. Road surface light reflection device as described. The road surface light reflecting device according to claim 13, wherein slopes are respectively provided at both ends of the guide, and a step is provided below each of the guides. 14. The apparatus of claim 13, wherein the base further comprises at least one rib, the base having a plurality of grooves, the plurality of grooves being disposed between the rib and the guide. Road light reflector. The light beam reflected by the reflection layer is concentrated within the range of the horizontal effective reflection angle centered on the incident direction of the light beam, and the value of the end point of the range of the horizontal effective reflection angle is ± 20 °. The road surface light reflecting device according to claim 1.