JP5342168B2 - Traffic safety sign - Google Patents

Description

  The present invention relates to a sign that is installed in a median strip, a diversion part, etc. of a road and is used for road safety, and a reflector is assembled by a molded member or the like so that its cross section is substantially stepped. As a result, it is intended to provide a traffic safety sign with a high gaze guidance effect. As used herein, “substantially staircase” refers to a substantially staircase shape even when the raised portion of the staircase is a slope or a combination of a vertical surface and a slope.

  Conventionally, various traffic safety signs installed at various locations on the road have been very effective in traffic safety because they have been installed in places that are easily accessible to the driver's line of sight. Widely installed on expressways and ordinary roads. Many of these signs are manufactured by attaching a reflective material to a metal plate or plastic plate or molding material having a curvature.

  However, in order to increase the effect of installing in the most conspicuous place for traffic safety, so as to reduce the resistance of the traveling vehicle passing, for example, when installing in the median strip, follow the shape of the nose In addition to the configuration, it is necessary to configure so that the reflector can exhibit more performance.

  As a reference example, the height is 250 mm to 500 mm, about 8 to 30 reflectors made of plastics are attached to a metal or plastic plate, and the radius of curvature is 200 mm to 400 mm on site. A sign that is bent into a semi-cylindrical shape as shown in FIG. This product is widely used because of the retroreflective performance with almost the same performance regardless of the angle of the headlight.

  The traffic safety signs for the median strip as shown in Fig. 3, which are often installed in the median strip, have plastics and metal plates matched to the shape of the nose of the median strip and have as little resistance as possible. In this way, it is bent into a cylindrical or semi-cylindrical shape, and a plurality of reflectors are attached around it.

  These configurations reflect well, no matter what direction the headlight of the car hits, and look ideal, but as it is at most intersections, the headlight hits the front from 50 to 300 meters away Despite its most important reflection brightness from the light source, it does not have such reflection performance. It doesn't reflect very well against headlights from a distance.

  This traffic safety sign reflects only about 2 reflectors when the height of the reflecting portion is 150 mm and the radius of curvature of the cross section is 200 mm, and only about 4 reflectors at the front even when the radius of curvature is 400 mm. do not do. When illuminated with a headlight from a short distance after entering the intersection, it can be seen without much reflection, but it has the same reflection performance as the front.

  In addition, from a distance of 50 to 300 meters, the reflector is not facing the front completely, and the central reflector is also at an angle of about 10 degrees to the left and right. The performance is about 80%.

  In the daytime, traffic safety signs that can be seen in a width of 400 to 800 mm can also be seen only at a distance of about 200 mm for a 400 mm width and about 400 mm for a width of 800 mm from a distance.

  This is because the diamond cut reflector reflects from the front (0 degree) to an incident angle of about 20 degrees, but hardly reflects when the incident angle becomes larger.

  The problem to be solved is that various light retroreflective signs that are used for traffic safety are installed in consideration of the driver's line of sight. , Guardrails, etc., especially those that are installed in dangerous places where vehicles pass and have high visual effects regardless of day or night.

  In such a road environment, we invented whether it was possible to provide a traffic safety sign with light retroreflective that can be easily installed and replaced with a structure that maximizes the effect of traffic safety day and night. It is.

In order to achieve the above object, the traffic safety sign according to the present invention is a cylindrical or folding screen that is erected vertically by a combination of light retroreflectors and has a horizontal cross section that is substantially stepped. The road safety sign object is configured such that a plurality of reflectors facing the front face are parallel to each other.

  When a traffic safety sign having a substantially stair-like shape according to the present invention is illuminated with a headlight of a car from a distance of 50 to 300 meters, the center two pieces shown in FIG. The four reflectors facing the front of this part reflect similarly well. In a full-scale test, the reflected brightness was simply about 2.2 times that of the product shown in FIG. Moreover, it reflects wide so that the width of the median strip is well understood.

  A plurality of reflectors facing the front are configured to be parallel. This is a combination of light retroreflectors, and a plurality of reflectors facing the front are directed in the same direction. Otherwise, the reflection performance from a distance cannot be maximized, and the effect as a traffic safety sign is diminished. The front here refers to the surface from Y in FIG.

According to the second aspect of the present invention, a plurality of reflectors that are both side surfaces when viewed from the front are arranged in parallel. If the reflectors on the side are not configured to be parallel, there may be cases where the reflective performance is not sufficient for the vehicle from the side, which is also effective as a traffic safety sign. Because it fades. The term “side surface” used herein refers to each surface from X and X ′ in FIG.

  In addition, a plurality of reflectors on both sides when viewed from the front are also configured to be parallel. If the reflectors on the side surface are not configured to be parallel, the reflective performance may not be sufficient for the vehicle from the side surface, which is also effective as a traffic safety sign. Because it fades. The term “side surface” used herein refers to each surface from X and X ′ in FIG.

  The members of the traffic safety sign object of the present invention are formed in a cylindrical shape or a folding screen as a whole by bending an aluminum plate having a thickness of 1 mm into a substantially staircase shape. A reflector or a reflection sheet for retroreflecting light is attached to the surface bent into a substantially stepped shape. In addition, if the C-shaped groove rail for mounting on a support column or foundation is installed inside an aluminum plate that is configured in a cylindrical or folding screen, the mounting part will not be exposed to the outside, resulting in a beautiful product. Become.

  As the reflector, a reflector or a reflection sheet is preferably formed on a C-shaped channel-shaped member made of extruded aluminum. In the case of a diamond-cut reflector, it is appropriate that the reflector has a thickness of 2 to 10 millimeters, a length of 50 to 300 millimeters, and a width of 50 to 150 millimeters. As for the size of the cross section, a width of 60 mm to 160 mm and a thickness of 5 mm to 20 mm are suitable. A C-shaped channel-shaped member is formed on each surface obtained by bending an aluminum plate into a substantially stepped shape.

  The light retroreflector is a reflector made of plastic cut diamond cube made of methacrylic resin or polycarbonate resin, and the light retroreflective with the accuracy of diamond cut corner cube of injection mold. The performance is determined.

  However, if this molded product is mounted as it is, the reflection performance will be reduced because dust or water enters the back of the diamond-cut molded product. Therefore, it is important to seal the back of the molded product with a lid. Moreover, you may use a reflective sheet instead of a reflector.

  The traffic safety sign object of the present invention configured as described above was subjected to a comparative test of reflection performance with the conventional product described in the preceding paragraphs 0005 to 0007. The conventional product has a semicircular shape with a curvature of 250 mm and a width from the front surface of 500 mm. The traffic safety sign object of the present invention is also tested in accordance with the reflective test equipment stipulated in JIS D5500 on page 9 of the line-of-sight guide standard established by the Ministry of Land, Infrastructure, Transport and Tourism with the width from the front set to 500 mm. did. The results are shown in Table 1 below.

In the case of an observation angle of 0.2 degrees, the conventional product is about 1800 candela / square meter at an incident angle of 0 degree, and 1480 candela / square meter even at an incident angle of 10 degrees. In contrast, the traffic safety sign of the present invention has 3880 candela / square meter at an incident angle of 0 degrees and 3330 candela / square meter even at an incident angle of 10 degrees. From this, it is 2.15 times at an incident angle of 0 degrees and 2.25 times even at an incident angle of 10 degrees. Thus, there is a clear big difference, and the presence and position of an intersection etc. are notified from a distance, and it can be seen that it is very effective for traffic safety.

  However, as shown in Table 1, there is a drawback that the reflection performance from an oblique angle of about 45 degrees is extremely low. However, when a traffic safety sign is installed at the intersection, the headlight from around 45 degrees diagonally strikes when it is already in the intersection, and the position of the tip of the median strip is well recognized. There is no problem.

  Still, when the position of the median strip at the intersection is excessively protruding inside the intersection, the shape of the intersection is deformed, or when it is a three-way or five-way, it can be made as shown in FIG. It was designed to be able to handle light from headlights entering from various angles.

  If a tapping hole is formed in the cross section of the C-shaped channel-shaped extruded aluminum that forms the reflector, a stainless steel or aluminum plate is applied to the upper or lower part, and the lid is attached using this tapping hole. Can increase strength and aesthetics.

  A C-shaped groove rail and a tapping hole are directly formed on the back surface of the C-shaped channel-shaped aluminum extruded member constituting the reflector, and these are arranged so that the reflector is substantially stepped, As a whole, it is configured to be cylindrical or folding screen. And you may attach to a support | pillar or a structure directly using the metal fitting etc. in the inside. Although it is configured as a cylinder or folding screen as a whole, it is called a cylinder or folding screen even if a columnar shape protrudes, collapses, or is slanted partially in a cylinder or folding screen. .

  In addition, if a reflector is also formed on the back of the right end of the tubular or folding screen traffic safety sign as a whole, it is easy to confirm the position of the end of the intersection from a vehicle traveling from the opposite lane side. .

  As described above, the reflector configured in a substantially staircase shape, when installed in the median strip, travels in the direction of the front of the cylindrical or folding screen toward the nose portion at the tip of the median strip. It is aimed at the headlight of the coming vehicle. At this time, the reflector of the traffic safety sign object is not only the central part, but also the left and right reflectors having a substantially stepped shape face the front, so the reflection luminance is about 2.2 times that of the conventional product FIG. .

  In addition, a C-shaped groove rail and a tapping hole for mounting and fixing are formed on a part of the back surface of the C-shaped channel member of the extruded aluminum material, so that the C-shaped channel can be attached to a column or structure. 5mm to 12mm nuts and bolts can be slid into the groove rails, and can be directly or via various fittings. Further, the tapping hole can be used for attaching the lid and adjusting the orientation of the reflector.

  Specific reflection performance according to the present invention is the performance shown in Table 1. The reflection performance by the reflection performance test from almost the front from 50 meters to 300 meters is 3880 candela / square meter compared to 1800 candela / square meter, which is more than double the reflection performance. This is useful for traffic safety because the position of an intersection or the like can be recognized quickly even from a distant front.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an example of a traffic safety sign 1 in which the traffic safety sign of the present invention is shaped like a folding screen. The cross section is formed by bending a 1 mm thick aluminum plate and attaching reflectors 4 on the left and right surfaces to form a substantially stepped shape. The upper lid 5a and the lower lid 6a are attached up and down to improve the appearance and increase the overall strength. A foundation 8 is formed under the column 7. Here, the substantially staircase shape means that the cross section of the traffic safety sign has a shape as shown in FIG. 4 or a shape as shown in FIG.

  On each surface of the substantially stepped step, a substantially C-shaped channel-shaped aluminum extruded shape member with a reflector 4 having a width of 90 mm and a length of 250 mm is fixed to an aluminum plate. The fixing method may be a durable double-sided tape, or may be fixed by rivets, screws, welding or the like.

  FIG. 2 is a perspective view of a traffic safety sign 2 in which the traffic safety sign of the present invention is formed into a cylindrical shape. The cross section is substantially stepped and is formed into a cylindrical shape combining four convex surfaces, and a reflector 4 having a width of 90 millimeters and a length of 250 millimeters is inserted around each of them to obtain a height of 500 millimeters.

  As shown in FIG. 7, a tapping hole 10 with a C-shaped groove rail 9 having a height of 10 mm, a width of 20 mm, and a cross section is attached to the back side of a substantially 1 mm-thick aluminum plate 13 having a cylindrical shape. Weld aluminum extruded profiles. For example, it is attached to the column 7 using a mounting bracket using this groove. Further, if a 6 mm bolt or nut is attached to the groove rail 9, it can be easily fixed to the column 7 with a metal fitting.

  Further, in order to cover the upper and lower parts, the upper cover 5b and the lower cover 6b made of stainless steel and made of a 1 mm plate material are attached to the tapping hole 10 in the cross section of the extruded aluminum member of FIG. Install and fix multiple units. And it is constructed on the site together with the column 7 and the foundation 8. Moreover, there is no problem even if the tubular traffic safety sign 2 is directly fixed with a mounting bracket on the concrete foundation.

  FIG. 3 shows a general traffic safety sign 3 that is conventionally used. A plastic or metal plate is bent into a folding screen, and a plurality of reflectors 4 are attached around it. Although these configurations seem to be ideal at first glance, the most important reflector 4 reflecting from a distance of 50 to 300 meters is about two when the radius of curvature of the cross section of the traffic safety sign is 200 millimeters, 400 millimeters. Even in this case, only about 4 sheets are effectively reflected. In addition, even if the reflector 4 is in the direction of the front, the reflector 4 is not completely directed to the center front, and the angle is swung to the left and right, so the reflection performance is worsened.

  FIG. 4 is a horizontal cross-sectional view of the case of FIG. 1 when the product is specifically manufactured with the configuration of the present invention and combined with the reflector 4 to form the traffic safety sign 1. The reflector 4 is fixed to the plate-like member 13 bent in a substantially step shape in the direction Y of the headlight of the vehicle. A reflector 4 is also attached to the direction XX ′ of the vehicle headlight from the side. The back reflector 11 may be the same as the reflector 4, but the reflector is directed in the opposite direction.

  FIG. 5 is a horizontal sectional view of the conventional traffic safety sign shown in FIG. Since the reflector 4 is uniformly attached to the rounded curved surface of the plastic or metal plate 13 having a radius of curvature of 200 mm, the front surface of the reflector 4 that requires the best reflection performance is 10 at the center. It is installed with an angle of about 5 degrees left and right.

  FIG. 6 is a partial perspective view of a reflector portion 14 composed of a C-shaped channel-shaped extruded aluminum material and the reflector 4.

  The reflector 4 having the light retroreflective performance is suitably an injection molding made of polycarbonate resin whose weather resistance has been examined, and a lid 15 for preventing dust and water from entering is fixed to the back side thereof. At this time, the reflector 4 is inserted and fixed in a structure and dimensions so that the reflector 4 does not come out from the frame 12 at the end of the reflector portion 14 of the C-shaped channel extruded aluminum member. The tapping hole 10 is used when a lid is attached to the upper part or the lower part.

  FIG. 7 is a partial perspective view in which a C-shaped groove rail 9 with a tapping hole is formed on an aluminum plate 13 using an extruded aluminum material. It is fixed to the aluminum plate 13 by welding or double-sided tape.

FIG. 8 is a horizontal sectional view of a case where the traffic safety sign 1 is formed by a combination of reflectors 4 as in FIG. 4. The reflector 4 is fixed to a plate-like member bent in a substantially step shape. The back reflector 11 may be the same as the reflector 4, but the reflector of the back reflector 11 is directed in the opposite direction only by this portion.

  An oblique portion and a vertical portion are combined with a substantially stair-like kick-up portion. This is an effective traffic safety sign for special intersections such as three-way crossing where vehicles enter from a distance of several tens of meters from the front of the diagonal part, and wide intersections.

Perspective view of the folding screen traffic safety sign object of the present invention Perspective view of the present tubular traffic safety sign Perspective view of a conventional traffic safety sign Typical horizontal sectional view of the traffic safety sign object of the present invention Typical horizontal cross section of conventional traffic safety sign It is a fragmentary perspective view of a reflector part. It is the fragmentary perspective view which comprised the tapping hole and the aluminum extrusion shape member with a C-shaped groove rail in the aluminum plate material. The perspective view of the traffic safety sign thing which made the substantially step-like cross section of the present invention into a folding screen shape

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 This invention folding road type traffic safety sign object 2 This invention cylindrical traffic safety sign object 3 Conventional traffic safety sign object 4 Reflector 5a Upper lid 5b Upper lid 6a Lower lid 6b Lower lid 7 Post 8 Base 9 C-shaped groove rail 10 Tapping hole
11 Back reflector 12 Frame 13 Plate 14 Reflector part 15 Lid

Claims (2)

A cylindrical or folding screen standing vertically with a combination of optical retroreflectors, with a horizontal cross section that is substantially stepped, and a plurality of reflectors facing the front are parallel. Become a traffic safety sign.   A cylindrical or folding screen standing vertically by a combination of optical retroreflectors, with a horizontal section configured in a substantially staircase shape, and multiple reflectors on both sides as viewed from the front are parallel. Constructed traffic safety sign.