JPH047215Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] The present invention relates to a line-of-sight guide installed at the edge of a road, inside a tunnel, etc. to ensure safe operation of automobiles. [Prior Art] Conventionally, most of the above-mentioned types of line-of-sight guides have been of the light-reflecting type. The light-reflecting line-of-sight guide, for example, as illustrated in FIG. 6, is made up of a reflecting plate 1, which is made up of a collection of many reflecting surfaces facing different directions, supported by a support rod 2. Such a line of sight guide A
are installed, for example, in line with a guardrail G installed along a road R as illustrated in FIG. According to this, the light emitted from a car traveling on road R during dark times such as at night is reflected by each line of sight guide A...
The driver's line of sight is guided by the reflected light from each of the many reflectors 1 in the area where the light hits, and
This will allow you to know the curve conditions of road R, etc. [Problems to be solved by the invention] However, although the light-reflecting type line-of-sight guide A as described above is easy to see because the brightness of the reflected light is relatively high, it is difficult to see the light emitted from the car. It only shines when the sun is shining, and anything that is not exposed to light does not shine at all. When a car is driving on a road, if the headlights are directed horizontally forward, it may obstruct oncoming or preceding vehicles; in that case, the direction of the headlights should be directed diagonally downward. In such a case, the irradiation range becomes particularly narrow. Therefore, when driving a car on a road R on which the above-mentioned conventional line-of-sight guides A are installed side by side, with the direction of illumination of the headlights directed diagonally downward, the reflector 1 located in a narrow range can be used to guide the road R. The driver has to judge the curve situation, etc., and the driver is likely to become fatigued due to the nervousness of the judgment, and may even cause an accident due to poor judgment. The present invention was made to improve the above-mentioned situation by providing a phosphorescent line-of-sight guide that emits light for a certain period of time after the light irradiation stops. It is an object of the present invention to enable a driver of a moving automobile to visually recognize the light emitted from line-of-sight guides located in a wide range, so that he or she can easily and accurately judge the curves of a road, etc. [Means for Solving the Problems] In order to achieve the above object, the line of sight guide of the present invention consists of individual particles of phosphorescent pigments that store light when irradiated with light and emit light within a certain period of time after irradiation with light is stopped. The main feature is that the device has a light-emitting section in which a phosphorescent layer is coated with silica and mixed in a synthetic resin layer with ultraviolet absorbing properties, and a base material layer having a light-reflecting surface is laminated. [Function] As is well known, phosphorescent pigments absorb and accumulate natural light from the sun and artificial light such as fluorescent lights, and after the light irradiation is stopped, they gradually release light in a dark place and emit light for a certain period of time. This refers to a phosphor that emits light. The phosphorescence and luminescence properties of such phosphorescent pigments are due to the fact that the phosphor, which is brought into an excited state by irradiation with light, returns to a stable state when irradiation is stopped. Therefore, the line-of-sight guide with the above configuration is
Due to the characteristics of the phosphorescent pigment contained in the phosphorescent layer, the accumulated light is released in the dark. By the way, zinc sulfide phosphor (ZnS:Cu) is known as a luminescent pigment, and this ZnS:Cu has the property of undergoing a chemical change and turning black under the influence of ultraviolet rays, water, and air, and has excellent weather resistance. I have a problem with this point. However, in the line of sight guide of the present invention, each particle of the luminescent pigment is coated with silica,
Moreover, since the phosphorescent layer containing the phosphorescent pigment is formed from a synthetic resin layer with ultraviolet absorbing properties, each individual particle of the phosphorescent pigment is protected from the effects of ultraviolet rays, water, and air, preventing the progression of blackening. is prevented.
In other words, the silica coating layer surrounding each particle of the luminescent pigment blocks the effects of water and air on the luminescent pigment, and the synthetic resin layer that forms the luminescent layer absorbs ultraviolet rays, preventing UV deterioration of the luminescent pigment. be done. Furthermore, since the luminous layer is laminated with a base material layer having a reflective surface, the brightness of the light when emitted is enhanced by the light reflected from the reflective surface. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows the specific structure of the light-emitting part 10 of the line-of-sight guide of the present invention, in which 11 is a base layer, 12 is a reflective layer, 13 is a phosphorescent layer, and 14 is a transparent surface protection layer. are stacked in this order. For the base material layer 11, an iron plate, a synthetic resin plate, a synthetic resin film, etc. are used. The reflective layer 13 is the base material layer 11
It is laminated on the surface of the substrate by appropriate means such as adhesion, and is generally formed of a white synthetic resin layer. That is, polyvinyl chloride resin (PVC) pellets mixed with a white pigment are melted and then laminated on the surface of the base material layer 11. By making the reflective layer 12 white, the degree of light reflection increases, and the visibility of light emitted from the luminous layer 13, which will be described later, is improved. Luminous layer 13
is also made of PVC, and this layer 13 contains a luminescent pigment 15.
The surface is rough because it is mixed with Each particle of the phosphorescent pigment 15 mixed in the phosphorescent layer 13 must be coated with silica. The individual particle size of the luminescent pigment 15 is preferably 5 to 25 microns. With a particle size of this level, it is possible to uniformly coat each particle of the luminescent pigment 15 with a thin film, and by doing so, the strength of the luminescent layer 13 can be maintained even if the particles are mixed in the luminescent layer 13. Deterioration can be avoided. In addition, the required coating material can be kept to a minimum, so
It is also preferable from an economic point of view. The transparent layer 14 is the luminescent layer 1
This is necessary because the surface of 3 is rough, and the light emitting part 10
It is useful for smoothing the surface and is made of PVC. FIG. 2 illustrates the line-of-sight guide A of the present invention. In the figure, reference numeral 20 denotes a frame body holding the light emitting section 10, and this frame body 20 is attached on top of the reflector plate 1 described in the conventional example. If a large number of such line-of-sight guides A are installed side by side on the roadside, the light emitted from a car driving on the road during dark times such as at night will emit light from the light-emitting part of each line-of-sight guide A within the irradiation range of the light. 10..., the light is stored, and after the car passes, the light emitting part 10
Since the irradiation of light stops, the stored light is gradually emitted. Therefore, in dark times such as at night, the line of sight guide A illuminated by the headlights of the preceding vehicle continues to emit light for a certain period of time (approximately 10 seconds) after the preceding vehicle passes, and the line of sight guide A is illuminated by the headlights of the preceding vehicle. The driver can accurately judge the curve of the road by looking at the light. In this case, the range of light irradiated by the preceding vehicle continuously shifts in the direction of travel as the preceding vehicle travels, so the driver of the following vehicle can move from the line of sight guide A in an extremely wide range. The emission of light can be seen immediately. Therefore, it becomes possible to accurately judge the road condition, and driving safety increases. In a line-of-sight guide A shown in FIG. 2, which has both a light emitting part 10 and a reflector 1, a driver of a following vehicle can visually recognize the light emitted from the light emitting part 20 over a wide range, and At the same time, since the vehicle travels while visually checking the reflected light from the reflector 1, it is possible to judge the curves of the road more accurately. In FIG. 2, a line-of-sight guide A that has both a reflector 1 and a light emitting part 10 was explained, but in this point, the light emitting part 10 is held in the frame 20 as shown in FIG. It may also be supported by the support rod 2. Alternatively, as shown in FIG. 4, the light emitting section 10 may be formed into a tape shape and attached to a guardrail G or the like in a linear manner. Although the above-mentioned embodiments all relate to line-of-sight guides for ensuring road traffic safety, the line-of-sight guide of the present invention can be used for other purposes as well. For example, when used as the tension wire, weft, or warp of a wire mesh fence, light is absorbed and accumulated in the phosphorescent layer 13 in which the phosphorescent pigment 15 is mixed.
The accumulated light is gradually released. Therefore, the presence of the wire mesh fence is clearly visible even at night. Incidentally, the phosphorescent pigment 15 deteriorates in its phosphorescent/luminescent properties due to the influence of ultraviolet rays, water, and oxygen in the air, but if the individual particles of the phosphorescent pigment 15 are coated with silica as described above, the coating will deteriorate. The layer blocks the effects of water and oxygen. Further, since the synthetic resin layer is configured to have ultraviolet absorbing ability, deterioration of the luminescent pigment 15 by ultraviolet rays is prevented. Synthetic resin layers that have this effect include PVC, polymethyl methacrylate (MMA), polycarbonate (PC), polystyrene, polyester, and polyethylene terephthalate (PET), and some resins themselves have UV absorption ability. However, it is desired that ultraviolet absorbing material be mixed into these synthetic resin layers to more fully exhibit the ultraviolet absorbing ability. Various methods can be used to coat the luminescent pigment with silica, such as a gas phase etching method, a liquid phase reaction method, and an emulsion reaction method. When the phosphorescent pigment 15 is mixed in the phosphorescent layer 13,
If the adhesion between the phosphorescent pigment 15 and the phosphorescent layer 13 is poor, problems such as the phosphorescent pigment 15 falling off may occur. In order to deal with such problems, for example, it is desirable to further coat a silane coupling agent on top of the silica coating of the luminescent pigment 15. It has been confirmed through experiments that by doing so, the compatibility between the silane coupling coating layer of the luminescent pigment 15 and the luminescent layer 13 is improved, and the adhesion between the two is enhanced. Next, we compared the brightness of the luminescent layer (comparative product) in which a luminescent pigment without silica coating was mixed in the luminescent layer and the luminance layer in which a luminescent pigment coated with silica was mixed in the luminescent layer (used in the line of sight guide of the present invention). The results of a comparison of the luminance of the luminescent layer (devised product) measured using an ultraviolet carbon arc weather meter are shown. Note that this comparative experiment was conducted when the phosphorescent layer was made of PVC, and 40% of the phosphorescent pigment and 0.3% of the ultraviolet absorber were mixed into the PVC.

[Effect of idea]

As is clear from the above, in the line of sight guide of the present invention, individual particles of the luminescent pigment are coated with silica and mixed in the luminescent layer, so that the luminescent pigment is protected from contact with water and oxygen in the air. At the same time, it is also protected from ultraviolet rays to prevent its darkening. Therefore, the weather resistance of the luminescent pigment is improved, and its luminescent and luminescent properties are maintained for a long period of time. Therefore, if the line-of-sight guides of the present invention are installed side by side at the edge of a road or in a tunnel, the driving safety of automobiles, etc. will be improved compared to the case where conventional reflectors are installed side by side. Also, when used for wire mesh fences, etc.
The existence of the wire mesh fence is clearly visible even at night.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the specific structure of the light emitting part used in the line-of-sight guide of the present invention, Fig. 2 is a perspective view showing an example of the line-of-sight guide, and Fig. 3 is another example of the line-of-sight guide. A perspective view, FIG. 4 is a partial side view showing how a tape-shaped line of sight guide is used, FIG. 5 is a schematic perspective view illustrating how a conventional line of sight guide is used, and FIG. 6 is a conventional line of sight guide. FIG. A... Line of sight guide, 10... Light emitting part, 11...
Base material layer, 12... Reflective layer, 13... Luminescent layer, 14
...Surface protective layer, 15... Luminescent pigment.

Claims (1)

[Scope of utility model registration request] A phosphorescent layer made by applying silica coating to individual particles of a phosphorescent pigment that accumulates light when irradiated with light and emits light within a certain period of time after the irradiation is stopped, and then mixes this in a synthetic resin layer that absorbs ultraviolet light. A line-of-sight guide used for roads, etc., which has a light-emitting part made by laminating a base material layer with a light-reflecting surface and a light-reflecting surface.