JPH06330510A - Noise reduction road sign with good legibility in rainy day and night time - Google Patents

Abstract

PURPOSE:To provide a noise reduction road sign having durability with excellent legibility in the night time or less noise pollution by spreading specific paints on a road in the shape of a projective semi-spherical body with specific size or projective unfixed form at indefinite intervals within a certain width to solidify, and carrying out work linearly in succession. CONSTITUTION:A projective semi-spherical body with 1-50mm in diameter and size and 2-10mm in height or projective unfixed form is spread on a road A with various kinds of paints 1 at indefinite intervals within a certain width to solidify. At that time, the paints 1 are a molten type using petroleum resin or rosin ester resin as a bonding agent or a non-solvent using acryl, epoxy, polyester, urethane as main ingredients or a reaction hardening type. The paints 1 are also a water soluble type using various kinds of resin such as alkyd, acryl, epoxy, etc., as main ingredients or an emulsion type. Glass beads are provided to the surface or inside of the projective semi-spherical body or projective unfixed form 2, and the paints are spread and are solidified to carry out work linearly in succession.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention does not generate noise when the vehicle is running, drains quickly in rainy weather, and even if water collects on the road surface, the convex tops project above the water surface of the vehicle. The present invention relates to a noise-reducing road marking that significantly improves visibility in the case of retro-reflection of light in rainy weather or at night.

[0002]

2. Description of the Related Art Conventional road marking is either a melt-type paint using petroleum resin or rosin ester resin as a binder, or a solvent paint-type paint containing alkyd resin or acrylic resin as a main component, using a manual construction machine or mechanical type. In most cases, a paint marker car was used to apply a certain width and a certain thickness to the road surface, and glass beads were sprayed to obtain visibility at night. However, with this method, regardless of the thickness of the film, the surface is flat, and if water slightly collects on the road surface due to rainfall, the road marking will be submerged and the light of the car headlight will be retroreflected at night. Visibility is almost lost. Various attempts have been made so far in order to solve this and improve the visibility in rainy weather or at night.

Among them, the one described in "Method of forming road marking with good visibility in rainy weather / nighttime" of Japanese Patent Application Laid-Open No. 3-47308 related to the invention of the applicant of the present invention shows visibility in rainy weather / nighttime. Is improving. In addition, a warning sound is generated to call the driver's attention and contribute to traffic safety. However, this warning sound is for people living in the neighborhood,
It may cause noise, which is an obstacle to the adoption of road markings that have improved visibility in a residential area during rainy weather or at night.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of conventional road markings and the problem of noise generation in Japanese Patent Laid-Open No. 3-47308. High visibility in rainy weather, daytime and nighttime-No traffic hazards (dangers) -Easy construction on the road surface should be established.

[0005]

The road marking of the present invention has a diameter of 5 to 50 mm and a height of 2 to 50 mm, which is made of various kinds of paint on the road surface.
It is characterized in that convex hemispheres of 10 mm are applied and solidified within a constant width at irregular intervals to be applied in a continuous line.
In addition, it is characterized in that a convex irregular shape having a size of 1 to 50 mm and a height of 2 to 10 mm, which is made of various paints, is applied to the road surface within a certain width at an irregular interval and solidified to be applied in a continuous line. And

More specifically, in order to secure visibility in the daytime, white or yellow paint is applied in advance, if necessary, and then a convex body is formed on the road surface or the paint on the road surface according to the present invention. While being applied and not dried, a reflecting material (glass beads or the like) is sprinkled and fixed. In particular,
Marker car with paint spray system (paint tank, paint heating device, pump, spray gun, etc.), convex construction system (paint tank, pump, 2-liquid mixing device, coating device, etc.) and glass bead sprinkling device Install in.

[0007] After the road surface is cleaned, paint is applied with compressed air of a compressor mounted on the marker car, and glass beads are fixed to the paint, and various paints are applied by the convex body construction system immediately after or immediately after the paint is dried. Is applied in a dot pattern with convex hemispheres or convex irregular shapes at irregular intervals, and a reflective material (glass beads or the like) is sprinkled and fixed while not dried. Then, protect the paint with a safety cone until it hardens, open the traffic after solidification, and finish the construction.

Further, the form of the road marking according to the present invention has the following features: I. Arrangement of the convex bodies should be irregular intervals with respect to the traveling direction of the vehicle. Furthermore, in order to obtain high visibility in rainy weather and at night, II. Rainwater should be drained promptly. III. Even if water collects on the road surface, the top of the convex body should protrude above the water surface. IV. It emits high reflection brightness against light from any direction. is necessary.

The hemispherical shape of the convex body has a diameter of 5 to 5
0 mm, height is 2 to 10 mm, and size of irregular shape is 1 to 5
It is possible to have a height of 0 mm and a height of 2 to 10 mm. However, regarding the shape and dimensions, including the prevention of slipping / falling of motorcycles and walking obstacles for pedestrians, if the convex body is a hemisphere, the diameter is 5 to 20 mm.
mm, height is 2 to 6 mm, and size of irregular shape is 1 to 50 mm
-A height of 2 to 6 mm is suitable. Regarding the construction arrangement and the arrangement, in the inventions according to claims 1 and 2, the convex bodies are arranged at irregular intervals in the traveling direction of the vehicle, or indefinite in all directions including the traveling direction of the vehicle. By arranging them at intervals, noise can be prevented. Further, in the invention described in claims 1 and 2, the interval of the convex body with respect to the traveling direction of the vehicle and the interval with respect to the lateral width direction of the line are 1 to 50 mm.
However, there is a good balance between prevention of noise, good drainage and reflected brightness.

As the coating material, various kinds of paints of various colors can be used. The above-mentioned paint is a melt-type paint using a petroleum resin or a rosin ester resin as a binder, or a solventless type or a reaction-curing type whose main component is various resins such as acrylic resin, epoxy resin, polyester resin, urethane resin. It is preferable to use a paint. However, solvent-based paints containing other alkyd resin or acrylic resin as the main component, or water-soluble or emulsion-based paints containing various resins such as alkyd resin, acrylic resin, or epoxy resin as the main component. It is also possible to use.

The properties of the paint require a high degree of thixotropy in order to maintain the convex shape during construction, and in terms of compounding, in addition to the resin, coloring pigments, fillers, glass beads, stabilizers, etc. Adjust appropriately by blending. In order to secure the visibility of the line in the daytime, various paints can be used as the primer to be painted in advance. Considering the adhesiveness to the convex body, a paint of the same system as the convex body is desirable.

Further, in the present invention, the glass beads as a reflecting material, which is mixed in the paint and scattered during the construction as required, is used in ordinary road markings according to JIS R.
33011 No. 1 (refractive index 1.5, particle size 106-850μ
m), but high refractive index glass beads having a refractive index of 1.9 or more can be used if higher reflection performance is desired. The particle size can be 50 to 3000 μm, preferably 100 to 1500 μm. These glass beads may be used alone or mixed to obtain intermediate performance. As a construction machine used to carry out the construction of the present invention, the one proposed by the present inventor in Japanese Patent Application No. 59-282079 can be mentioned.

[0013]

[Operation] The mechanism of producing sound can be explained as follows. Since the conventional road marking has a flat surface, no specific sound is emitted even when a vehicle runs on it. However, JP-A-3-4730
When the vehicle travels on the road marking of claim 1 of the "method of forming a road marking having good visibility in rainy weather / nighttime" described in Japanese Patent No. 8, there is a specific sound. This is because when the convex bodies are arranged on the road surface at regular intervals, the tire and the convex bodies collide with each other at a constant cycle when the vehicle travels at a constant speed on the convex bodies. When the tire and the convex object collide with each other at a constant cycle,
The striking sound is amplified by the tire, so that a large sound with a constant frequency is emitted. (See Fig. 2) (Example) When the interval between the convex bodies is 8 cm and the vehicle speed is 60 km / h (1670 cm / s), 1670 cm / s / 8 cm = 209
/ Sec and becomes a sound of 209 Hz. On the other hand, if the intervals between the convex bodies arranged on the road surface are irregular, the intervals between the tapping sounds are irregular and are not amplified, nor does the sound with a constant frequency. (Refer to FIG. 1) In this case, the noise emitted by the tire is almost the same as when traveling on asphalt having a rough surface, and does not become a specific noise.

The improvement of visibility in rainy weather or at night can be explained as follows. Since the conventional road marking has a flat surface, when rainwater collects on it, the glass beads on the surface of the road marking are submerged and a water film is formed on the surface. If a water film forms on the surface, most of the light from a car headlight is reflected on the surface without entering the water film, and retroreflection cannot be performed. (Refer to Fig. 3) On the other hand, when a convex body with a height H of 2 to 10 mm is placed on the road surface, even if rainwater accumulates on it, the top of the convex body protrudes above the water surface, causing retroreflection. It becomes possible,
The visibility at night can be improved. (See Figure 4)

[0015]

The present invention will be described in detail below. Example-1 (Fig. 6) Paint preparation Main material A liquid * Acrylic prepolymer 30 2 Titanium oxide 15 ** Glass beads 16 Cold water stone (0.1 to 0.8 mm) 25 Calcium carbonate (0.1 to 25 μm) 12 *** Additive (stabilizer) 2 100 (wt%) Hardener B liquid benzoyl peroxide 40 Diluent 60 100 (wt%) Mixing ratio A / B = 100/5 (parts by weight) * Example: Mitsubishi Rayon Acrisilup DR manufactured by Co., Ltd.
-450 ** Example: Unibeads UB-108 manufactured by Union Corporation
L (refractive index 1.5, particle size 106 to 850 μm) *** Example: Aerosil # 20 manufactured by Nippon Aerosil Co., Ltd.
0 In the production of paint, the main liquid A is mixed in its entirety and stirred with a high-speed disper. The curing agent B liquid is a solution obtained by uniformly mixing and dissolving by the method of handling peroxide.

The properties of these paints are as follows: Liquid A viscosity: 650 dPa · s (20 ° C.), density: 1.
7 Liquid B viscosity: 100 dPa · s (20 ° C) A / B mixed liquid has a viscosity of 550 dPa · s (20 ° C) and a thixotropy of 4.8 (6 rotation viscosity of B-type viscometer is divided by 60 rotation viscosity). The pot life after A / B mixing is about 10 minutes. As a primer paint, JIS K 5665
Acrylic resin white paints corresponding to two types were used.

These paints and glass beads were filled in a paint marker and applied on the outside line (15 cm width, solid line, white) of a general national road. First, compressed air is blown to clean dirt and dust on the road surface (A), and acrylic resin paint 1 heated to 60 ° C. is spray-coated (15 cm width, film thickness 250 to 300 μm). A liquid acrylic resin paint was applied to the convex irregular-shaped body 2 having a round shape. The shape of the convex irregularly shaped body 3 has a diameter D: 1 to 10 mm and a height H:
It was applied at an irregular interval of ₂ to 4 mm, a lateral irregularity L ₁ of the convex irregularly shaped body close to a circle, and a longitudinal interval L _{2 of 1 to} 40 mm. Immediately after that, glass beads (JIS R 3301 No. 1, refractive index 1.5,
Particle size 106 to 850 μm) was sprayed and fixed on the undried paint and the two-component paint film. The amount of glass beads sprayed is about 65 g / m. Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. As a result, the running noise was smaller than that of the conventional road marking, and the visibility was good even in rainy weather or at night.

Example 2 (FIG. 6) Paint preparation Main liquid A * Acrylic prepolymer 30 Yellow lead pigment 12 ** Glass beads 16 Cold water stone (0.1-0.8 mm) 25 Calcium carbonate (0.1 -25 μm) 15 *** Additive (stabilizer) 2 100 (wt%) Curing agent B liquid benzoyl peroxide 40 diluent 60 100 (wt%) Mixing ratio A / B = 100/5 (parts by weight) * Example : Mitsubishi Rayon Co., Ltd. Acrylic Wrap DR
-450 ** Example: Unibeads UB-108 manufactured by Union Corporation
L (refractive index 1.5, particle size 106 to 850 μm) *** Example: Aerosil # 20 manufactured by Nippon Aerosil Co., Ltd.
0 In the same manner as in Example-1, the construction was carried out on the hami line forbidden (central line) on the general national road.

First, an acrylic yellow paint (JIS K56665 type 2) 1 heated at 60 ° C. as a primer
Spray coating (15 cm width, film thickness 250-300 μm)
Immediately after that, the above two-pack type acrylic resin coating material was applied to a convex irregular shape having a round shape. The shape of the irregular shaped body 3 close to the circle is a diameter D of 1 to 10 mm, a height H of 2 to 4 mm, a lateral spacing L ₁ of the convex irregular shaped body 3 and a vertical spacing L _{2 of 1 to} 40 mm. did. Immediately after that, glass beads (JIS R 33
01 No. 1, refractive index 1.5, particle size 106-850 μm)
Was sprayed and fixed to the undried paint and the two-component paint film. The amount of glass beads sprayed is about 65 g / m.
Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. As a result, the running noise was smaller than that of the conventional road marking, and the visibility was good even in rainy weather or at night.

Example-3 (FIG. 7) Paint Preparation Same as Example-1. As a primer paint, JIS K 5665
Acrylic resin-based white paint corresponding to two kinds was used. The paint marker is filled with these paints and glass beads, and the outside line of the general national road (15 cm width, solid line, white)
It was installed on. First, blow compressed air to the soil on the road A,
Clean the dust and spray paint acrylic resin paint 1 heated to 60 ° C (15 cm width, film thickness 250-300μ
m), and immediately thereafter, the above-mentioned two-component acrylic resin coating material was applied to the convex amorphous body 4 having many sharp points. The shape of the convex irregular shaped body 4 is diameter D: indefinite, height H: 2 to 4 mm, lateral spacing L ₁ of the convex irregular shaped body 4 with many sharp points, vertical spacing L ₂ : 1 to
It was applied at irregular intervals of 60 mm. (The finished appearance is as shown in Fig. 7.) Immediately after that, glass beads (JIS R 3301 No. 1, refractive index 1.5, particle size 106 to 850 µm) were sprinkled and undried paint and two-component paint coating film were applied. Fixed to. The amount of glass beads sprayed is about 65 g / m. Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. As a result, the running noise was smaller than that of the conventional road marking, and the visibility was good even in rainy weather or at night.

Example-4 (FIG. 7) Paint Preparation Same as Example-2. In the same manner as in Example-3, the construction was carried out on the general national highway prohibition line (center line).

First, an acrylic yellow paint (JIS K56665 type 2) 1 heated at 60 ° C. as a primer
Spray coating (15 cm width, film thickness 250-300 μm)
Immediately after that, the above-mentioned two-component acrylic resin paint was applied to a convex amorphous body having many sharp points. The shape of the convex irregular shape 4 is a diameter D: indefinite, a height H: 2 to 4 mm, a lateral distance L ₁ between the convex irregular shape 4 having many sharp points, and a vertical distance L ₂ : 1 to 60 mm. Applied. (The finished appearance is as shown in Fig. 7.) Immediately after that, glass beads (JIS R 3301 No. 1, refractive index 1.5, particle size 106 to 850 µm) were sprinkled and undried paint and two-component paint coating film were applied. Fixed to. The amount of glass beads sprayed is about 65 g / m. Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. As a result, the running noise was smaller than that of the conventional road marking, and the visibility was good even in rainy weather or at night.

Example-5 (FIG. 6) Paint Preparation Same as Example-2. In the same manner as in Example-3, the road was cut out on a general national road and was installed on the prohibited line (center line). First, as a primer, acrylic yellow paint heated to 60 ° C (JIS K56665 2
Seed) spray coating (15 cm width, film thickness 250-300μ)
Immediately after that, the above two-component acrylic resin coating material was applied in the form of convex irregular shaped particles mixed in a shape similar to large and small circles. The shape of the large and small convex irregularly shaped bodies 3 close to the circle is diameter D: indefinite, height H: 2 to 4 mm, the lateral distance L ₁ between the convex irregularly shaped bodies 3 close to the circle, and the vertical distance L ₂ : 1 to It was applied at irregular intervals of 60 mm.
(The finished appearance will be as shown in Fig. 6) Immediately after that, glass beads (manufactured by Union Corporation, Unibeads U)
B-722H, refractive index 1.93, particle size 106 to 1410
μm) was sprayed and fixed to the undried paint and the two-component paint coating film. The amount of glass beads sprayed is about 65 g / m. Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. As a result, compared to the conventional road marking, the running noise was low, the reflected brightness was particularly high, and the visibility was good in rainy weather and at night.

Comparative Example-1 (FIG. 5) Paint Preparation Same as Example-2. In the same manner as in Example-3, the road was cut out on a general national road and was installed on the prohibited line (center line). First, as a primer, acrylic yellow paint heated to 60 ° C (JIS K56665 2
Seed) spray coating (15 cm width, film thickness 250-300μ)
m), and immediately thereafter, the above two-component acrylic resin coating material was applied in the shape of a convex hemisphere having a certain size. The shape of the convex hemisphere 2 is a diameter D: 15 mm, a height H: 2 to 4 mm, a lateral distance L ₁ : 5 mm between the convex hemisphere 2 and a vertical distance L ₂ : 60 mm, and the length direction of the road marking line is set. Was applied in a wide stripe pattern with wide intervals.
(The finished appearance is as shown in Fig. 5.) Immediately after that, glass beads (JIS R 3301 No. 1, refractive index 1.5, particle size 106 to 850 µm) were sprinkled and undried paint and two-component paint coating film were applied. Fixed to. The amount of glass beads sprayed is about 65 g / m. Traffic was blocked for approximately 30 minutes to protect the coating and then released. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. The result was a certain loud running noise. However, the visibility in rainy weather and at night showed good performance.

Comparative Example-2 (FIG. 5) Paint preparation (conventionally used molten paint) Thermoplastic petroleum resin (C-5 type) 15 Yellow lead pigment 5 Glass beads 16 Kansui stone (0.1-0) 0.7 mm) 27 calcium carbonate (0 to 35 μm) 34 plasticizer 3 100 (% by weight) In the same manner as in Example-3, the road was cut out on a general national highway and was installed on the prohibited line (center line).

First, as a primer, an acrylic yellow paint (JIS K56665 type 2) heated to 60 ° C. is spray-coated (15 cm width, film thickness 250 to 300 μm).
Then, after drying, a heat-retaining device is attached to the construction machine and the above-mentioned melt-type paint melted in another melting pot is filled and similarly applied in a convex hemisphere shape (D: 15 mm, H: 2-4 mm, L ₁ : 5 mm, L
_2: 60 mm), and then sparged with glass beads (UB-108L) at the time of melting paint Construction (65 g / m), thereby fixing and releasing the traffic after about 5 minutes. When the running noise, retroreflective performance, slip resistance value and visibility of this road marking were measured, the results shown in Table 1 were obtained. The result was a certain loud running noise. However, the visibility in rainy weather and at night showed excellent performance immediately after the construction, but it was confirmed that the shape of the convex hemisphere was rapidly lost due to abrasion and thermal softening, and the durability was poor.

Comparative Example-3 Paint Preparation (Melting Paint Used Conventionally) Thermoplastic Petroleum Resin (C-5 Series) 15 Yellow Lead Pigment 5 Glass Beads 16 Kansuiseki (0.1-0.7 mm) 27 Calcium carbonate (0 to 35 μm) 34 Plasticizer 3 100 (% by weight) Comparative Example 3 is an ordinary melting type paint (JIS K 5665).
3 types 1) as a flat line in the usual way,
It was constructed as a hami out-of-line line on general national roads, and the result was that there was no specific running noise, but it was confirmed that visibility was poor when it was raining or at night.

[0028]

[Table 1] Measurement method: Noise measurement Simple noise meter JIS C 1503 According to the applicable products. Retro-reflective performance measurement Reflectance luminance meter: manufactured by Toshiba Barotini Co., Ltd. MILOLAX 7 Incident angle: 86.5 °, Observation angle: 1.5 ° Slip resistance measurement by Portable Skid Resistance Tester. Visibility: In the rainy weather, at night, the visual visibility is shown in a traveling vehicle (50 km / h), and the evaluation values of 5 to 1 are based on ASTM and are evaluated according to the following evaluation criteria.

The visibility in Table 1 above is an evaluation point Evaluation criteria 5 Satisfactory (very visible) 4 Satisfactory (visible) 3 Partially dissatisfied (visible) 2 Some dissatisfied (not very visible) 1 Dissatisfied (visible) Absent)

[0030]

According to the present invention having the above structure, the following effects are obtained. It is durable for a long period of time, has little retroreflective performance and little deterioration in slip resistance over time, and in particular, road marking with excellent visibility in rainy or night conditions can be easily constructed. Since the noise of the car is low, noise pollution can be prevented even in residential areas. Safety issues such as traffic obstacles have also been solved, and we can hope for practical benefits.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a convex body and a tire of a vehicle in which convex bodies are arranged on a road surface at irregular intervals according to the present invention.

FIG. 2 is a diagram showing a relationship between a convex body and a vehicle tire when the vehicle is traveling on a road surface on which convex bodies are arranged at regular intervals.

FIG. 3 is an explanatory view of a behavior of a light beam of a headlight when raining or at night of a conventional flat type road marking.

FIG. 4 is an explanatory view of the behavior of a light beam of a headlight during rainy or nighttime of the convex road marking according to the present invention.

FIG. 5 is a plan view of Comparative Example-1 of road markings applied to a road surface.

FIG. 6 is a plan view showing a construction example of the road marking of the present invention.

FIG. 7 is a plan view showing another construction example of the road marking of the present invention.

[Explanation of symbols]

A Road surface D Diameter of convex hemisphere or convex irregular shape H Height of convex hemisphere or convex irregular shape L ₁ Horizontal interval of convex irregular shape L ₂ Vertical interval of convex irregular shape 1 Paint 2 Convex Hemisphere 3 Convex irregular shape close to a circle 4 Convex irregular shape with many sharp points

Claims (7)

[Claims] 1. The diameter of a road surface made of various paints is from 1 to 50.
A noise-reducing road surface with good visibility during rainy weather and at night, characterized in that convex hemispheres with a height of 2 mm to 10 mm are applied and solidified within a certain width at irregular intervals, and are constructed in a continuous line. Marking. 2. The size of the road surface made of various paints is 1 to 5
A noise-reducing road surface with good visibility in rainy weather and at night, which is characterized by applying 0-mm-height 2-10 mm-height convex irregular-shaped bodies within a certain width at irregular intervals and solidifying them to construct a continuous line. Marking. 3. A noise-reducing road marking with good visibility in rainy or night conditions according to claim 1 or 2, wherein the paint is a melting type using a petroleum resin or a rosin ester resin as a binder. 4. A noise-reducing road marking having good visibility in rainy weather or at night according to claim 1, wherein the paint is a solvent type containing alkyd resin or acrylic resin as a main component. 5. The visual inspection at the time of rainy or nighttime according to claim 1 or 2, wherein the coating material is a solventless type or a reaction curable type containing various resins such as acrylic resin, epoxy resin, polyester resin, urethane resin as a main component. Noise-reducing road marking with good performance. 6. The rainy weather according to claim 1 or 2, wherein the coating material is a water-soluble type or an emulsion type containing various resins such as alkyd resin, acrylic resin and epoxy resin as main components.
Noise-reducing road marking with good visibility at night. 7. A noise-reducing road marking with good visibility in rainy weather or at night, wherein glass beads are provided on the surface or inside of the convex hemisphere and the irregular irregular shape.