JP2006299661A - Optical retroreflective marker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical retroreflective marker which is set on a center line, an outer line, a lane changing line, a curb, a guard rail, etc. of a road, so as to contribute to traffic safety, exerts high delineation effect, hardly suffers from wear and tear even if it is frequently scraped or trod by vehicles, is easy to repair, and produceable at a drastically low cost. <P>SOLUTION: The optical retroreflective marker which is elastic and has an almost arrow-head-shaped and almost planar indicating section, is formed by attaching fixing tongues to sides of a rear cutaway portion of the almost arrow-head-shaped indicating section, in one body. Thus the optical retroreflective marker can be fixed to a different structure or a road surface. Even if it is frequently scraped or trod by vehicles, it has restoring force by virtue of its shape and material, facilitates its replacement, and hardly suffers from wear and tear. Further the optical retroreflective marker can three-dimensionally protrude from the structure, and is very visible even in daytime due to application of a remarkable color thereto. At night, the optical retroreflective marker exerts more effect for traffic safety by virtue of reflection by a retroreflective material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is installed on a road center line, outer line, lane change line, curbstone, car stop, guardrail, etc., and can be used for multiple purposes and has a high gaze guidance effect for vehicles. Even if it is frequently touched or stepped on, there is little damage, and even if it is damaged, it can be easily replaced, and it will be offered at a significantly lower price.

  Conventionally, flexible sign poles installed on the road center line, outside line, lane change line, curbstone, car stop, etc., may be installed near the road surface where it is easy to enter the line of sight of the driver of the vehicle. It is very effective in traffic safety and is widely installed on highways, general roads, parking lots, etc. throughout the country. Is installed to prevent the vehicle from deviating from the center line, to show the road alignment clearly, or to prevent entry. Many of these poles are made of a thermoplastic elastomer.

  However, the installation on the road, which is the most conspicuous place in terms of traffic safety, is also a place where it is most frequently hit or stepped on, so the damage is very severe. Although the height of the bumper of the vehicle is 40 centimeters to 50 centimeters, and the height of the pole is as high as 40 centimeters to 100 centimeters, even though the vehicle height is as low as about 16 centimeters, If pulled, it will be pulled in the middle of the pole and will be damaged greatly. Therefore, even if the pole is firmly fixed to the road surface with an adhesive or the leg is embedded in the road surface and fixed more firmly, it will be entangled with the bumper and pulled, so the pipe part will be torn or torn. The retroreflective material on the surface is also peeled off. Moreover, it is crushed by the road surface in the flat state by the tire of a vehicle from the advancing direction, and a bending part ruptures and tears.

  Although it is often installed on the outside line of a road, even in such a place where damage by a vehicle is relatively small, an expensive tall flexible sign pole is installed, which is uneconomical. Also, it is often installed on the center line of narrow roads at short intervals, but the road width is felt extremely narrow, and it is forced to operate extremely tightly using nerves, which is rather unstable in terms of traffic safety Is making.

  In addition, a large amount of reflectors are attached to the upper and side surfaces of road curbs, guardrails, etc., but most of them are hard molded articles, which are obstacles to light vehicles and pedestrians. Since each reflection object is not a meaningful sign only by reflecting, it is impossible to guide road alignment unless a plurality of reflection objects are installed.

  Plastics and aluminum road fences are also used at the road center line, outer line, merger, and diversion points, which contribute to traffic safety. Light vehicles such as motorcycles and bicycles It has become a considerable obstacle. Moreover, although reflective tape is affixed also on guardrails etc., it is natural that it can be displayed only in the form which adapts to the shape of a structure, and it does not become a more meaningful sign.

  In [Patent Document 1], a semi-circular cylindrical cap body is formed by holding a transparent arbitrary material, a front semicircular curved surface and a semicircular plane on the upper bottom surface as a reflecting surface, and a square plane on the back surface. Can be easily installed by inserting it as a washer under the head of the assembly bolt such as a guard rail to be attached, and on the left side of the semicircular curved inner surface on the front, a progress indicator color reflecting sheet, By providing a reverse-prevention marking color reflection sheet on the right side with a separation interval in the middle, it is possible to set the front reflective marking classification. In addition, the location of the facility from the sky can be made a visible sign by joining the reflection sheet to the semicircular inner surface of the upper bottom surface. a.

  However, even if the reflective cap for gaze guidance constructed in this way can be attached to the guardrail, it can not be attached on the curbstone or on the road surface, and even if it is attached to the guardrail, it is hemispherical Therefore, the reflection performance is weak and the visual line guiding effect is low. Moreover, it will be easily damaged and scattered by the contact of the car.

  According to [Patent Document 2], it can be easily installed at the time of curb block installation work, and has excellent durability and visibility, and does not interfere with retroreflection even if there is a little dust or snow, and snow removal. Provide movable gaze guidance and facilities that do not interfere with work. A reflector is attached to one side of a substrate made of an elastic body to form a reflection portion, and a rotation axis is formed on the other side of the substrate in a direction perpendicular to the substrate, and the rotation axis is A movable line-of-sight guide mark that is supported by the support portion and is capable of rotating the substrate is sandwiched between curb blocks in which a plurality of curb blocks are arranged, and the reflection part of the substrate protruding from the curb block is attached to the curb stone. Stands on the top surface of the block or tilts to the side. a.

However, in this configuration, even if the curb can be installed, it cannot be installed on the existing curb, and the orientation of the reflector when it is installed cannot be changed. It is inconvenient because the direction is limited, and the left curve and right curve do not strike at the angle at which the light from the headlight reflects.
JP 2002-88723 A JP 2002-81026

  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. The road surface, curbs, guardrails, utility poles, gutters, etc. are particularly required for safe passage of vehicles, and must be highly visible regardless of day or night. Therefore, since it is frequently applied or stepped on, it is damaged such as tearing and falling, or scattering. In addition, it is common in the field that reflectors are directly attached to structures such as guardrails and curbs, but it cannot be used as a sign to express more than the shape of the structure, and is not compatible with the attached structure. It has been.

  In such a road environment, while exhibiting traffic safety effects with careful consideration for a long period of time, durability can be increased, construction can be done easily, replacement is easy, and light retroreflective signs are cheap He studied whether it could be supplied.

  In order to achieve the above-mentioned object, most of the conventional retroreflective signs of the present invention are arranged by placing a round flexible plastic pipe upright or reflecting material. Is affixed directly to structures such as guardrails and curbs, and plastics and aluminum road fences are installed on the road surface. A light retroreflective marker was invented in which a tongue piece protrudes from the side of the notch so that the cross section is substantially L-shaped or T-shaped, and is integrally formed.

  It can be applied to various structures and road surfaces, and even if it is frequently touched or stepped on, it has a restoring force from its shape, can be easily replaced, and has little damage to the light. It is on the sign. Moreover, in addition to projecting three-dimensionally from the structure, red, yellow, fluorescent colors, etc. can be installed alone or mixed together, or the reflection surface can be contoured around the reflection surface. In addition to being conspicuous, it was devised so that the traffic safety effect could be demonstrated by reflection by a retroreflective material at night.

  As described in claim 1, in the light retroreflective sign having a planar shape with a substantially arrowhead-shaped marking portion, a fixing tongue piece is formed to protrude from the rear incision side of the generally arrowhead-shaped marking portion. . The tongue piece is projected so that the cross section is substantially L-shaped or T-shaped. Although it can be fixed to the structure easily by forming it in the shape of a substantially arrowhead, particularly at the side of the rear notch, it is difficult to fix it to the structure if it is configured at the outer periphery. However, when a tongue piece is constructed around the outer periphery or when there is no tongue piece, a light retroreflective sign is fixed to the structure by attaching it to special plastics or metal moldings for mounting. It may be attached.

  In order to make the road look wide and comfortable, the height at the time of installation of the light retroreflective sign was lowered to about 20 centimeters or less. In addition, by making it substantially flat, it is hard to be damaged even if it is stepped on by a vehicle, and it is a sign that is molded with a highly elastic and flexible thermoplastic elastomer, rubber, polyolefin resin, polycarbonate resin, etc. The wall thickness is 0.5 to 10 millimeters, and the size is 5 to 30 centimeters from the pointed end of the substantially arrowhead shape. The width of 5 to 30 centimeters. In addition, if the thickness is 0.5 mm or less, there is a problem in strength, and if it is 10 mm or more, the film becomes too thick and becomes an obstacle, causing a secondary disaster. Although the shape is said to be planar in the substantially arrowhead-shaped marking portion, the plane may have a curvature or bend in three dimensions, and may be any shape as long as it is substantially planar.

  An explanation will be given for determining the detailed shape of the marking portion of the retroreflective sign. FIG. 4 is a diagram in which the depth of cut is examined. The length of the substantially arrowhead-shaped marking portion is a, and the depth of the cut is a preferred dimension in the range of 2 / 3a to 1 / 5a. Even if this range is exceeded, the retroreflective sign can be constructed, but inconvenience occurs when it is used for various purposes in various structures. For example, when the depth of cut is too deep, it becomes difficult to mark an arrow at 2 / 3a or more, and when it is smaller than 1 / 5a, the arrow becomes closer to a triangle, so it is far from a meaningful mark.

  FIG. 5 is a diagram in which the width of the cut is examined. When the width of the rear part of the substantially arrowhead-shaped marking part is b and the width of the cut is 1 / 3b or less, even if a tongue piece can be formed on the cut side, it becomes a cramped state when being attached to the structure. Not practical. A dimension of 2 / 3b to b is preferred.

  FIG. 6 shows an example in which the depth of cut is set to 2 / 3a or more and the maximum width is b. However, even if it can be attached to the structure, Since the reflection area is small, it is difficult to visually recognize from a distance, and meaningful marking cannot be performed.

  FIG. 7 shows an example in which the depth of cut is set to 2 / 3a or more and the width of the cut is set to the minimum 1 / 3b. Although it can be labeled as a light retroreflective marker, the width of the cut is narrow, which also has a problem in mounting to various structures.

  In FIG. 8, if the depth of cut is 1 / 5a or less, it will be difficult to mount because the cut portion hits the rounded surface of a corner such as a curbstone, and the shape as a light retroreflective sign will also deteriorate. It is not preferable. However, it is also possible to improve the familiarity by making several vertical cuts in the notch portion corresponding to the corner portion of the curb toward the tip of the substantially arrowhead shape.

  FIG. 9 shows an example in which both the depth and width of the cut are reduced. Although the shape as a light retroreflective sign is not bad, the sticking to a structure becomes tight and attachment becomes difficult. As described above, the shape and dimensions of the substantially arrowhead shape are determined in accordance with the installation location.

  Naturally, a fixed portion for installation on a road surface or a structure is necessary. A tongue piece protrudes from the side of the rear notch of the substantially arrowhead shape so that the cross section is substantially L-shaped or T-shaped. The tongue piece may be rectangular, round, or shaped like a band according to the side of the rear notch, but it is approximately 2 square centimeters to 100 square centimeters depending on the size of the arrowhead.

  If it is configured to be inclined approximately 30 to 90 degrees with the substantially arrowhead-shaped flat part, it will become a sharp curve if the angle of the molded product is pasted without adjusting the angle each time it is attached to the structure. Aside from the point, the performance as designed naturally can be demonstrated. There is no need to separately mold and fix the fixing tongue piece, and injection molding can be performed at once, so it can be manufactured at low cost. However, this structure is not limited.

  The tongue piece and the road surface or structure are fixed with an adhesive, double-sided tape, anchor bolts, screws or the like. If it is desired to be firmly fixed, a leg portion may be provided and embedded in the road surface, or may be fixed with an anchor bolt. Further, in a place where the mischief is severe, it is advisable to attach the tongue of the light retroreflective marker to a plastic or metal molding and attach it to the structure.

  It was decided to paste a reflective material on the surface of the substantially arrowhead shaped marking. The light retroreflective sheet affixed to the surface of the substantially arrowhead-shaped marking portion is well reflected by the light of the vehicle headlight and is highly visible, so that it is effective for traffic safety. Even if it is a bit with the vehicle, it varies from large trucks to small light vehicles, naturally the mounting position of the headlights is different, the height of the driver's seat is also different, the viewing angle is also different, the road width and the radius of curvature of the curve point The incident angle is also different, but the reflection sheet using fine spherical glass beads used for this retroreflective reflective sign may change the incident angle and the viewing angle, and the vehicle progresses. Since the arrow can be installed so as to guide the line of sight with respect to the direction, stable reflection can always be achieved.

  Although it is a relatively small light retroreflective sign with a short height, it stands up from the road surface, protrudes from structures such as guardrails and curbs, and its arrows mean the direction of travel of the vehicle . The effect of visibility from the driver is high even during the daytime, and the headlights facing down at night are often used, and the visibility performance is greatly improved, so that the road safety effect is higher both day and night.

  In places where the light retroreflective sign placed on the road surface is frequently stepped on to the vehicle, two tongues formed on the rear notch side of the light retroreflective sign are included in the base molding for road surface application. It is good to install in the form to do. Even if it is damaged, it can be easily replaced and can be maintained at a low cost. At this time, it is desirable that the base portion has a size and a bottom structure that can exert sufficient adhesive force with the road surface.

  The size of the base is generally a postcard-sized flat plate, and ideally, it is desirable to have a dovetail groove on the bottom surface, but it is not limited to this. On this flat plate, there were formed a base part having about 4 to 20 bottomless potholes, a protruding part having a huge portion at the same position and number of tips as the bottomless potholes, and two slits. The tongue of the light retroreflective marker is inserted into the slit on the base lid, and the protruding portion is pushed into the base hole without the bottom of the base. With such a configuration, even if the light retroreflective sign is damaged, the base cover over the base is removed, the light retroreflective sign is replaced, and the base cover is again attached. The repair is completed by a simple method of covering the molded product with the base.

  As described above, the light retroreflective sign of the present invention can travel with peace of mind because the road looks wide despite being relatively small. The essential visibility can be seen well by sticking a red, yellow, green, fluorescent, or other reflective sheet to the flat part of the molded product in the daytime, or by adding a contour that surrounds it. Since it is installed in a place as close as possible to the road surface or in a structure closest to the road, it is very easy to see in combination with the shape of the arrow. At night, the light from the headlight of the vehicle can be installed three-dimensionally in a direction with good reflection efficiency, so that it can be reflected well and the line of sight can be guided smoothly. The reflecting material used for the flat portion of the arrow may be a reflecting material other than the reflecting sheet or a diamond-cut reflecting material or small glass beads.

  Molded products made of elastic thermoplastic elastomer, rubber, polyolefin resin, polycarbonate resin, etc., and can be manufactured integrally by injection molding, minimizing mold investment, and can be stepped on in vehicles Even when touched, the material can absorb impact, friction, and pressure with the elongation and shape of the material, and since there is little localized load, the degree of permanent deformation of the molded product can be reduced. . And in places where damage seems to be low, you can supply cheap products by selecting and molding a general-purpose grade of polyolefin resin.

  The tongue piece for fixing may be configured separately and integrally on both sides of the rear notch of the substantially arrowhead-shaped marking part, or may be integrally configured in a band shape according to the side of the rear notch In addition, no extra member or labor is required for mounting, and the light retroreflective sign can be manufactured at low cost. This tongue piece is formed on the side of the rear incision. However, if the tongue piece is inclined at about 30 to 90 degrees with respect to the plane of the substantially arrowhead-shaped marking portion, the angle is set when attaching to the structure. If the angle of the molded product is installed as it is without adjusting it, the performance as designed naturally can be exhibited apart from the sharp curve point.

  When a plurality of light retroreflective reflective signs are attached continuously, the installation interval and the installation angle are temporarily placed in advance, and the line-of-sight inductivity is confirmed and installed. By installing in this way, the driver can control the vehicle with peace of mind. In the case of a left curve, normally, the reflector formed on the side surface of the structure cannot be seen, and the line of sight cannot be guided. By constructing this retroreflective sign at the corner between the top and side of the curb, it partially protrudes from the top of the curb, so the curve line can be clearly seen even on the left curve, which is very effective It is. This reduces the resistance caused by obstacles and changes in road alignment, allowing the driver to travel with peace of mind. As a result, it becomes an ideal road safety material.

  In particular, when installing a retroreflective sign on a road curb or guardrail that is easily tampered with, it must be an attachment method that can be securely fixed, not an adhesive. It is recommended that the tongue of the light retroreflective sign be wrapped or wrapped in a metal fitting or a metal fixture, and fixed to the curb or guardrail.

  When installing a light retroreflective sign on the road surface, the size of the postcard is large, and there are about 4 to 20 bottomless pits on the plane of the base, and at the tip pushed into the bottomless pit, Insert the tongues of the light retroreflective marker into the two slits of the base lid that has a large number of protrusions, enclose them, and then push the protrusions into the bottom hole of the base. . The molded product configured and combined in this way is fixed to the road surface. And even if the light retroreflective sign is damaged, the base cover over the base is removed, the light retroreflective sign is replaced, and the base is covered with the base again. The repair is complete. In addition, when the dovetail formed on the back of the base is installed on the road surface with an adhesive, the adhesive wraps around the dovetail and does not easily peel off.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a representative light retroreflective sign 1 of the present invention. Reflective sheets are affixed to both sides of the flat portion 2 of the substantially arrowhead shaped marking portion. A tongue piece 3 is formed on the side of the rear notch of the substantially arrowhead-shaped marking portion.

  The angle β of the joint between the tongue piece 3 and the flat portion 2 of the substantially arrowhead-shaped marking portion of the light retroreflective sign 1 is configured as shown in FIG. The size of the tongue piece 3 is approximately 3 cm square. For example, when the tongue 3 is fixed to a curb or the like, the retroreflective surface of the plane portion 2 naturally has a substantially retroreflective surface with respect to the light of the headlight of the vehicle. It will be installed at 30 degrees.

  The material of the main body of the light retroreflective sign 1 is made of an elastic thermoplastic elastomer, which is deformed even when it comes into contact with the vehicle, but returns to its original shape again. Moreover, since the plane portion 2 of the substantially arrowhead shaped marking portion is an arrow, it can be used alone for meaningful marking for guiding the vehicle. Moreover, the color of the retroreflective material and the reflectivity combine to improve traffic safety regardless of day or night.

  FIG. 3 is a perspective view in which a tongue piece is formed in a strip shape with the optical retroreflective sign of the present invention. With such a configuration, since the strip-like tongue piece 7 is attached to the entire rear notch side of the substantially arrowhead-shaped marking portion, the strength is increased and the mounting strength to the curb is also increased. At the time of attachment to the guard rail, the band-like tongue piece 7 on the side of the rear notch may be fixed with the molding 22 for attachment.

  4 and 5 are views for examining the shape of the substantially arrowhead-shaped marking portion. If the length of the hypotenuse from the tip is 14 centimeters, the length of a is approximately 13 centimeters and the width b is 14 centimeters, taking into account the balance between the depth of cut and the width of the hypotenuse. The depth of the cut is 4 centimeters, and the width of the cut opening is preferably 11.5 centimeters. As shown in FIGS. 6, 7, 8, and 9, when the depth and width of the cut are in a poorly balanced shape, naturally, the reflection performance is not sufficient or the shape is poor and the line of sight cannot be sufficiently guided. This may cause problems in installation.

  FIG. 10 is a perspective view of a construction example in which the light retroreflective sign 1 is disposed at the corner portion of the curb 5 of the road. A double-sided tape is affixed to the back of the tongue piece 3, and the tongue piece 3 is adhered to the upper and side surfaces of the curbstone 5. At this time, it is possible to reliably bond the substrate by performing a ground treatment such as applying a primer in order to improve the adhesion, as well as cleaning the adhesion surface cleanly. If you are worried about bonding with double-sided tape only, use an adhesive or attach the tongue 3 to a “く” shaped molding like that shown in Fig. 11, and use a strong adhesive such as epoxy resin. It is good to fix securely.

  FIG. 12 is a perspective view of a construction example in which the light retroreflective sign 1 is disposed on the guardrail 6. The tongue piece 3 is fixed to the upper end portion of the guardrail 6 with a double-sided tape. In the case of a left curve, if the tongue piece 3 is fixed slightly by protruding from the upper end of the guard rail 6, the alignment of the left curve can be clearly displayed and the line of sight can be guided. Moreover, in a special danger location, it is good to stick to not only the upper end part of the guardrail 6, but to a lower end part, and to mark it in two steps. Further, it is more effective to emphasize the danger sign by shortening the installation interval of the sign 1 or the like.

  FIG. 13 is a perspective view of a molded product for securely fixing the light retroreflective sign 1 to the guardrail 6. A tongue piece 7 is protruded in a band shape on the side of the rear notch of the substantially arrowhead-shaped marking portion so that the cross section is substantially L-shaped or T-shaped, and is fixed to the guard rail 6 with a molding 22 for attachment. In particular, in places where tampering occurs, the mounting molded product 22 is firmly fixed to the guard rail 6.

  FIG. 14 is a perspective view of the light retroreflective sign 1 installed on the road surface. 16 and the base 9 of FIG. 15 are constructed by inserting the tongue pieces 3 formed on both sides of the cut portion 4 inside the substantially arrowhead-shaped marking portion into the slit 12 and enclosing it. To do.

  FIG. 15 is a rear view of the base lid 9, and 15 protrusions 11 are formed on the base lid flat surface portion 16, and the protrusion 11 has the tip enlarging portion 14 as shown in FIG. 18. A slit-like cut 15 is formed at the center, and a narrow portion 13 is formed thereon. 17 is a cross-sectional view taken along the line AA ′ of FIG. A peripheral edge 21 is formed so as to cover the base 10.

  FIG. 16 is a top view of the base 10, and the protruding portion 11 constituting the base lid 9 is fitted into the bottomless hole 19 with a bottomless hole 19. The recess 18 is a recess for mounting the 4 cm square tongue piece 3. The dovetail 17 is formed on the back surface of the base, and the adhesive enters the dovetail and is firmly fixed to the road surface.

  In FIG. 18, the slit-like notch 15 is narrowed in the tip enormous portion 14 of the protruding portion 11 formed on the base lid 9, and is fitted into a hole 19 having no bottom, and the base lid 9 is fixed to the base 10. It is sectional drawing. At this time, of course, the tongue piece 3 is inserted in advance into the slit 12 formed in the base lid 9. The mold hole 19 having no bottom is difficult to mold unless it is a through hole. It is important that the bottomless pothole 19 is prevented from entering the adhesive by using a seal 20 or the like before being fixed to the road surface with the adhesive.

  FIG. 19 is a cross-sectional view showing a state in which the tongue piece 3 of the light retroreflective sign 1 is in the recess hole 18 of the base 10. Although it is convenient if the dovetail groove 17 is configured so as not to come under the pothole 19 having no bottom, the thickness of the entire base can be reduced, but this is not a limitation.

  FIG. 20 is a perspective view of a construction example installed on the road surface of the road marking material 8. A tongue piece 3 of the light retroreflective sign 1 is configured to be wrapped and mounted in a base 10 and a base lid 9.

  FIG. 21 is a perspective view of a construction example installed on the road surface on the left side of the junction of the road. It is important to narrow the interval between the light retroreflective markers 1 and to reliably guide the line of sight. At this time, the installation interval of the light retroreflective sign 1 is appropriately about 1 to 3 meters. In addition, in order to make the light retroreflective sign 1 placed on the road surface into a shape with better reflection performance, the flat surface portion 2 is formed at an angle close to a right angle with the road surface. Both tongue pieces 3 of both ends of the incision may be configured to be mounted in the base 10 and the base lid 9 at a position narrowed inward. This mounting method always stresses the reflective surface in the direction where the headlight hits a right angle even if it is stepped on. The gaze guidance effect can be maintained throughout.

It is a front view of the light retroreflective sign thing of this invention. It is sectional drawing of the junction part of the plane part of a marking part of a retroreflective sign, and a tongue piece. It is the perspective view which comprised the tongue piece in the strip | belt shape with the light retroreflective marker of this invention. Examination diagram of depth of cut inside the roughly arrowhead shaped marking Examination of the width of the cut inside the substantially arrowhead-shaped marking Example diagram when the depth of cut and the wide inside of the substantially arrowhead-shaped marking part are deep Example diagram when the depth of cut is deep and narrow inside the substantially arrowhead-shaped marking. Example diagram when the inner notch of the substantially arrowhead shaped marking is shallow and wide Example diagram when the depth of cut is shallow and the inside of the substantially arrowhead shaped marking is shallow It is a perspective view of the construction example when attaching a light retroreflective sign thing to a curb. It is a perspective view of the molding for curb attachment. It is a construction example perspective view when attached to a guardrail. It is the perspective view which attached the retroreflective sign thing which constituted the tongue piece in the shape of a belt to the guard rail with the molding for attachment. Perspective view constructed integrally with the base for pasting on the road surface It is a back view of the lid | cover of a base. It is a front view of a base. It is AA 'sectional drawing of a base cover. It is a junction partial sectional view of a base and a lid of a base. It is a fragmentary sectional view of the base piece and the tongue piece included and attached to the lid of the base. It is a perspective view of the construction example installed in the road surface. It is a perspective view of the construction example installed in the road surface of a junction part.

DESCRIPTION OF SYMBOLS 1 Optical retroreflective sign 2 Plane part 3 Tongue piece 4 Cut part 5 Curbstone 6 Guardrail 7 Strip-like tongue piece 8 Marking material 9 Base cover
10 base 11 protruding part 12 slit 13 narrow part
14 Enlarged part at the tip 15 Slit-like cut 16 Flat surface part of the base 17 Dovetail groove 18 Indentation 19 No-bottom hole 20 Seal 21 Around the edge 22 Guard rail mounting molding 23 “C” shaped formation β Tongue piece and optical recursion Of the reflective reflective sign with the flat surface

Claims (1)

A light retroreflective sign having a plane shape with a substantially arrowhead-shaped marking portion, and a marking piece having a fixing tongue protruding from the rear incision side of the substantially arrowhead-shaped marking portion.

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