WO2005124402A1 - 再帰反射機能部材およびロードマーカ - Google Patents
再帰反射機能部材およびロードマーカ Download PDFInfo
- Publication number
- WO2005124402A1 WO2005124402A1 PCT/JP2005/010766 JP2005010766W WO2005124402A1 WO 2005124402 A1 WO2005124402 A1 WO 2005124402A1 JP 2005010766 W JP2005010766 W JP 2005010766W WO 2005124402 A1 WO2005124402 A1 WO 2005124402A1
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- WO
- WIPO (PCT)
- Prior art keywords
- retroreflective
- front surface
- function member
- retroreflective function
- view
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/126—Reflex reflectors including curved refracting surface
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/136—Reflex reflectors plural reflecting elements forming part of a unitary body
Definitions
- the present invention relates to a retroreflective function member for reflecting light incident from a light emitting source toward a light emitting source again, and a load marker incorporating the retroreflective function member.
- Patent Documents 1 to 5 have been proposed as prior arts in which reflected light is provided with directivity by using lenses instead of glass beads.
- Patent Document 1 discloses a sign in which a concave reflecting mirror is attached to the bottom of a frame, and a lens having a toric surface or a cylindrical surface as an exposure surface is fitted on the front surface of the frame.
- Patent Document 2 discloses a prism-type retroreflective function member having a convex or concave entrance / exit surface as a regression-type reflecting mirror (retroreflective function member).
- the retroreflective function member reflects the convex or concave force of the incident / exit surface on the inner surface three times, and again emits the convex or concave force toward the light emitting source.
- Patent Document 3 discloses a retroreflective mirror device (a retroreflective function member) in which light rays incident from a bihedral lens are reflected by a first reflecting surface and a second reflecting surface, and the reflected light is again a bihedral lens.
- a lens, a first reflecting surface and a second reflecting surface are formed as an integral piece, and the shape of a double-sided lens is preferably elliptical, cylindrical, or circular. It is described.
- Patent Document 3 discloses that the angle formed between the first reflecting surface and the second reflecting surface is slightly smaller than 90 °, that is, 89.875 °, so that the angle between the first reflecting surface and the second reflecting surface is 89.875 °. It is also described that a 0.25 ° displacement angle is provided in the vertical direction to the emission axis to correspond to the height difference between the headlights of the car and the eyes of the driver.
- Patent Document 4 discloses a road marker (road marker) including an embedded portion in which a hemisphere is partially removed and an exposed portion in which a hemisphere having a smaller diameter is partially removed.
- the light beam incident from the spherical incident surface of the exposed portion is reflected by the spherical reflecting surface of the inner surface of the buried portion, and the power of the exposed portion is again emitted toward the light emitting source.
- Patent Document 5 discloses that a large-diameter hemisphere and a small-diameter hemisphere are integrally formed as a lens body to be fitted into a delineator, and a large-diameter hemisphere is positioned at a position where the back focus of the small-diameter hemisphere becomes zero.
- a reflective element having a hemispherical reflective surface is disclosed.
- Patent Document 1 Japanese Utility Model Publication No. 34-3443
- Patent Document 2 Japanese Utility Model Application Laid-Open No. 61-81601
- Patent Document 3 JP-A-64-63901
- Patent Document 4 JP-A-02-235001
- Patent Document 5 JP 08-220315 A
- a high ratio of reflected light rays that are directed toward or near the light emitting source When the reflected light beam is reflected to a space far from the light source, the light beam is emitted to a space far from the driver's eyes, resulting in a useless reflected light beam. Conversely, the light reflected too close to the light source will not reach the driver's eyes when the vehicle and the reflector approach each other. Specifically, assuming that the distance between the car and the retroreflective member is 25 m and the height difference between the driver's eyes and the headlights is 70 cm, the reflected light in the vertical direction is narrowed down to ⁇ 1.5 °. A high ratio of reflected light is required. Furthermore, considering the case where the distance between the car and the retroreflective member is closer than 25 m, the force that requires a reflected light beam that spreads more up and down becomes necessary. It is judged that it is not necessary because the distance is recognizable.
- the same reflection characteristics as those in the up-down direction are required, so that a high ratio of the reflected light beams also limited to the range of ⁇ 1.5 ° is required.
- the angle (observation angle) consisting of the driver's eyes, right headlight, and the road marker is a straight line.
- the distance between the car and the retroreflective member is calculated as 25m, it is about 0.1 °, and the horizontal divergence angle of about ⁇ 0.1 ° is sufficient.
- the vertical spread angle of the reflected light beam is preferably about ⁇ 1.5 ° as described above.
- the beam pattern of the incident light beam (the cross-sectional shape in the direction perpendicular to the light beam) is circular
- the beam pattern of the reflected light beam is preferably an ellipse whose major axis is in the vertical direction.
- the beam pattern of the reflected light beam is preferably an ellipse having a longer left and right direction than the above beam pattern.
- a retroreflective member having a configuration in which the vertical divergence angle (aperture angle) and the horizontal divergence angle (aperture angle) of the reflected light beam can be set independently is more desirable.
- the incident / outgoing surface force is such that the incident light beam is reflected by the concave reflecting mirror on the back side and is emitted again from the incoming / outgoing surface, and the number of reflections is only one. Therefore, less energy is lost due to internal reflection, and the efficiency of use of light under condition 1 is high.
- V is disclosed as to the required condition 3.
- t is set to independently set the vertical spread angle and the horizontal spread angle of the reflected light beam, and the condition 3 required is disclosed.
- Patent Document 3 As shown in FIG. 6 of the publication, light rays incident through the entrance / exit surfaces of the double-sided lens are reflected twice at two reflection surfaces perpendicular to each other by the total internal reflection principle. After being reflected, the light is emitted from the entrance / exit surface again, so it can be said that this is a retroreflective function member with high light use efficiency that can reduce energy loss due to internal reflection.
- a light beam having an incident angle of about ⁇ 20 ° is incident, the incident angle at which the two reflecting surfaces can maintain total reflection is even smaller than that in Patent Document 2, and the light use efficiency deteriorates. Therefore, it does not satisfy the required condition 1.
- Patent Document 3 since the entrance / exit surface is not a straight line but a convex lens shape, as shown in FIG. 14, the angle formed by the first reflection surface and the second reflection surface is set to around 90 °.
- rays incident on the end of the convex lens, which is the entrance / exit surface are greatly refracted.As a result, it is difficult to keep the spread of reflected rays in the left and right directions within the range of ⁇ 1.5 °, and reflection in the vertical direction. Since the incoming and outgoing surface and the first reflecting surface are not parallel to each other, the distance between the incoming and outgoing surface and the first reflecting surface changes depending on the incident position, and as a result, the reflected light spreads vertically. Within the range of ⁇ 1.5 °.
- V is disclosed as to the required condition 3.
- Patent Documents 4 and 5 a light beam incident through a hemisphere or a hemispherical entrance / exit surface whose upper part is cut is placed under a road surface or a hemispherical part whose lower part is cut. Since the light is reflected by the reflecting surface and emerges again from the entrance / exit surface, the number of internal reflections is one, and the energy loss lost by the internal reflection is small. Therefore, the required condition 1 is satisfied.
- the required condition 2 cannot be satisfied.
- the light rays incident at a position close to the optical axis on the emitting surface the light rays are reflected near the light source.
- the light is reflected by the larger hemispherical reflecting surface, and is emitted again from the input / output surface.
- the light beam incident on the periphery has a shorter focal length than the light beam incident at a position close to the optical axis, and the reflected light beam is a light beam greatly deviated from the light source.
- This is a basic problem common to retroreflective members having a spherical entrance surface as large as retroreflective members using glass beads or the like.
- t is set to independently set the vertical spread angle and the horizontal spread angle of the reflected light beam, and the condition 3 required is disclosed.
- any of the retroreflective function members disclosed in Patent Documents 1 to 5 can independently set the vertical spread angle and the horizontal spread angle of the reflected light beam.
- a light beam that has entered the lens axis at a certain angle to the lens axis has a low light use efficiency and a low ratio of reflected light beam is reflected toward or near the light source.
- the present invention provides a retroreflective function member that reflects light incident from a light source on the light source again or in the vicinity thereof.
- the front, left and right side surfaces, the rear surface, and the upper and lower surfaces are plate-shaped, and the front surface, which functions as a light input / output surface, has a cylindrical shape that projects linearly in a plan view and projects forward in a side view, and the left and right side surfaces.
- One of the side surfaces is finished as a reflection surface capable of contributing to retroreflection, and the rear surface functioning as a light reflection surface has a cylindrical shape that is linear in plan view and protrudes rearward in side view.
- the front surface is substantially parallel, and the angle between the rear surface and the side surface serving as the reflection surface is in a range of 90 ° ⁇ 0.5 ° .
- the angle between the rear surface and the side surface serving as the reflection surface is in a range of 90 ° ⁇ 0.5 ° .
- a specific color such as yellow or red
- Inside a transparent body It is also possible to add such yellow or red pigment.
- one side surface is a total reflection surface not subjected to aluminum evaporation or the like
- the rear surface is a reflection surface subjected to aluminum evaporation or the like. Only the reflection at the light source, and the light use efficiency increases.
- the retroreflective function member since the front surface and the rear surface are substantially parallel and the side surface is a reflecting surface in a plan view, even if the light beam enters at a large incident angle with respect to the lens axis, The angle of incidence on the side surface contributing to the reflection becomes larger than the critical angle, and it is possible to perform total reflection, so that the above-mentioned required condition 1 is satisfied.
- the vertical spread angle of the reflected light beam can be controlled by adjusting the ratio of the radius of curvature of the front surface to the radius of curvature of the rear surface.
- the horizontal spread angle of the reflected light beam can be controlled. That is, the vertical spread angle and the horizontal spread angle of the reflected light beam can be set independently, and the required condition 3 is satisfied.
- a side surface that does not contribute to the retroreflection is more than a line connecting an intersection point of the front surface that does not contribute to the retroreflection and the front surface and a center point of the rear surface. It is preferable to leave uneven portions for positioning or marks on the gate portion of the injection molding on the side surfaces of the upper and lower surfaces or the squares.
- the radius of curvature of the front surface of the retroreflective function member is Rl
- the radius of curvature of the rear surface is R2
- the distance between the front surface and the rear surface is L
- the center of the radius of curvature of the front surface and the rear surface is the same axis.
- the incident angle is an angle ( ⁇ 10 °) that is inclined from the horizontal angle in side view. Even in the case of incidence, the area where retroreflection can be performed increases, and the efficiency of using retroreflected light can be kept high, which satisfies the above required condition 1.
- R2ZR1 be in the range of 1.5 to 2.5.
- R2ZR1 be in the range of 1.5 to 2.5.
- the spread of the reflected light in the vertical direction (vertical direction) is suppressed to within ⁇ 1.5 °. be able to.
- the thickness is increased from a thin plate to a cubic configuration, as described in Patent Documents 4 and 5, the light incident on the peripheral portion separated by the optical axis force becomes a light greatly deviated from the light source. Become.
- the spread of the reflected light beam in the left and right direction is governed by the angle between the rear surface and the side surface contributing to retroreflection, and this angle is set to an appropriate value in the range of 90 ° ⁇ 0.5 °, and the entrance and exit surfaces are flat.
- the rear surface of the reflection is a straight line or an arc having a radius of curvature close to a straight line in plan view (an arc that is convex toward the rear). If the radius of curvature in the case of a circular arc is increased, the angle between the rear surface of the lens body and the side surface contributing to retroreflection becomes almost 90 °, so that all the reflected light is retroreflected in the incident direction. By changing the value of the radius of curvature, the left-right luminous flux of the retroreflected light is narrowed or spread.
- the center of the radius of curvature of the rear surface in a plan view is present between the central axis of the entrance surface and an extension of the reflection side surface.
- the load marker according to the present invention is configured by incorporating the above-described retroreflective function member in a case.
- a gap air layer is interposed between adjacent retroreflective function members with a plurality of retroreflective function members incorporated.
- the side surface of the retroreflective function member can function as a reflective surface.
- the retroreflective function member incorporates a front surface serving as a light entrance / exit surface inclined with respect to the axis of the case in a plan view, and the front surface of the case is also provided with the retroreflection surface. It can be formed in parallel with the front surface of the reflection function member, whereby a load marker with high light use efficiency can be obtained.
- the plurality of retroreflective function members are divided into left and right sets so as to form a V-shape or an inverted V-shape in plan view.
- V-shape or inverted V-shape makes it effective for application to road center lines.
- the same retroreflective function can be exerted even if the curve is left or right.
- the road marker When the load marker is installed on the road surface, the road marker is fixed between the lower portion of the road marker and the road surface via an adhesive.
- a structure in which a plurality of fixing feet for embedding are formed can be considered.
- the inside of the fixing foot is made hollow to allow the adhesive for fixing to penetrate into the part in order to reduce the thickness of the fixing foot at the time of molding.
- a small hole through which only the air can escape and the adhesive cannot penetrate therethrough is desired.
- a concave portion is formed at the rear of the surface of the V-shaped or inverted V-shaped case in plan view, and the phosphorescent material is fixed to the case together with the transparent adhesive in the concave portion, so that there is no automobile headlight. Even in this case, night visibility can be provided. Therefore, it is effective when a road marker is installed on the square yellow line around the fire hydrant lid embedded on the road.
- the retroreflective function member according to the present invention can exhibit the retroreflective function even when the light emitting source moves and the horizontal incident angle on the retroreflective function member changes. Further, the retroreflective function member according to the present invention has a high retroreflection efficiency, and the road force incorporating the retroreflective function can be sufficiently visually recognized even at the time of rainfall.
- the retroreflective function member according to the present invention exhibits approximately two to three times the light use efficiency as compared with the prism lens type (cube corner type) retroreflective function member. Whereas the thickness of the load marker of 15 mm to 20 mm is required, a thin load marker of about 5 mm can have the same reflection performance. This makes it possible to prevent a bicycle or motorcycle from tipping over when the mouth-dimmer force is placed on the white line (or yellow line) of the center line.
- FIG. 1 A plan view of a load marker to which a retroreflective function member according to the present invention is applied.
- FIG. 5 (a) and (b) are side views of the retroreflective function member
- FIG. 6 is a plan view illustrating the operation of a retroreflective function member.
- FIG. 7 is a view similar to FIG. 1 showing another embodiment.
- FIG. 8 is a view similar to FIG. 1 showing another embodiment.
- FIG. 9 is a view similar to FIG. 1 showing another embodiment.
- FIG. 10 is a view similar to FIG. 1 showing another embodiment.
- FIG. 11 is a view similar to FIG. 1 showing another embodiment.
- FIG. 14 is a diagram illustrating an optical path of reflected light of a conventional prism type retroreflective function member.
- FIG. 15 is a diagram illustrating an optical path of reflected light of a retroreflective function member having a spherical incident surface. Best form of
- FIG. 1 is a plan view of a load marker to which the retroreflective function member according to the present invention is applied
- FIG. 2 is a front view of the load marker
- FIG. 3 is an enlarged cross-sectional view in the A_A direction of FIG. 1
- FIG. 5 is a plan view
- FIG. 5 is a side view of the retroreflective function member
- FIG. 6 is a plan view illustrating the operation of the retroreflective function member.
- a plurality of retroreflective function members 10 ... are housed in a case 1 in which the load marker has a substantially pentagonal shape in plan view.
- the case 1 is formed by molding a transparent resin, for example, and is fixed to the road surface via an adhesive.
- a transparent resin for example
- the dimensions of the illustrated case are 5 mm in thickness, 126 mm in width, and 55 mm in length.
- the conventional road marker is so thick that there is a danger of falling over when a motorcycle or the like rides on.
- the case of the embodiment has a thickness of 5 mm and does not hinder the running of a motorcycle or the like.
- the case 1 is formed with a concave portion 2 that is open on the back surface.
- the retroreflective function member 10 is housed in the concave portion 2 and closed by the bottom plate 3 to become a load marker.
- the concave portion 2 is further formed with a small concave portion 2a, and the convex portion formed on the upper surface of the retroreflective function member 10 is formed in the small concave portion 2a.
- the case 1 may be made of a metal such as aluminum. However, in the case of a metal case, it is necessary to provide a window so that the front surface of the retroreflective function member 10 is exposed.
- the plurality of retroreflective function members 10 ... stored in the case 1 are divided into left and right sets, and these right and left sets are arranged so as to form a V-shape.
- the member 10 ⁇ ⁇ - is installed with the front side, which is the light entrance and exit surface, inclined with respect to the axis of the case.
- the left set of retroreflective members 10 ⁇ ⁇ ⁇ has the left side as the reflective surface and the right side as the reflective surface.
- the set of retroreflective function members 10 ⁇ - has the right side as the reflective surface.
- a gap 4 is provided between the side surfaces of the retroreflective function members 10 constituting the right and left sets. If the side surfaces of the adjacent retroreflective function members 10 are brought into close contact with each other without providing the gap 4, the light incident on one of the retroreflective function members 10 is not reflected on the side surface and remains in the other retroreflective function member 10 as it is. It will penetrate and will not retroreflect.
- the retroreflective function member 10 is made of a high translucent resin such as acrylic resin, and has a plate shape having a front surface 11, left and right side surfaces 12, 13, a rear surface 14, an upper surface 15, and a lower surface 16.
- the front surface 11 functions as a light entrance / exit surface, and has a cylindrical shape that is linear in plan view and protrudes forward in side view.
- the front face 11 forms an arc in a side view, and the center Ol of the curvature radius R1 is on the axis connecting the center of the front face 11 and the center of the rear face 14.
- the left and right side surfaces 12, 13 form substantially 90 ° with the front surface 11, and one side surface 12 is finished into a smooth plane so as to reflect light rays incident from the front surface 11 toward the rear surface 14, and the other side surface. 13 does not contribute to retroreflection.
- the rear surface 14 has a linear shape in plan view, the rear surface has a cylindrical shape (arc) projecting rearward in side view, and the outer surface is coated with aluminum and the inner surface is a reflecting surface.
- the rear surface 14 is parallel to the front surface 11 and forms approximately 90 ° with the left and right side surfaces 12 and 13. In particular, the angle with the side surface 12 functioning as a reflection surface is set to be accurate within a range of ⁇ 0.5 ° based on 90 °.
- the center 02 of the radius of curvature R2 of the rear surface 14 connects the center of the front surface 11 to the center of the rear surface 14.
- the radii of curvature R1 and R2 overlap on the axis. That is, assuming that the length of the retroreflective function member 10 is L, the relationship is R1 + R2> L.
- R2ZR1 is set in the range of 1.5 to 2.5. If R2 / R1 is less than 1.5 or exceeds 2.5, the spread of the reflected light in the vertical direction will be too large, and R2ZR1 will be most narrowed near 2.0.
- R2Z Rl l.71 for long distances (300-400 m).
- R2ZR1 1.95 should be set to 0.3 ° in the vertical direction, which is suitable for the retroreflective member of (3).
- the retroreflective function member of the present invention can adjust the aperture angle (spread angle) in the vertical direction by adjusting the dimensions of the curvature radii Rl and R2 of the front surface and the rear surface, and can adjust the radius of curvature.
- the aperture angle swipe angle
- the radius of curvature By setting the relationship between the center position of the and the length (L) of the retroreflective function member, light use efficiency can be improved.
- the upper and lower surfaces 15 and 16 are not surfaces that contribute to retroreflection, and the upper surface 15 is closely or adhered to the lower surface of the concave portion 2, and the bottom plate 3 is closely or adhered to the lower surface 16. .
- a positioning projection 10a is formed on the upper surface 15, and a positioning recess 10b used when the retroreflective function member 10 is used in an overlapping manner is formed on the lower surface 16.
- the positions where the convex portions 10a and the concave portions 10b are provided are positions close to the side surface 13 that does not contribute to retroreflection.
- a buffer layer may be provided on each of the upper and lower surfaces 15 and 16 so as to absorb a shock even when a heavy object such as an automobile passes.
- the front surface 11 of the retroreflective function member 10 is inclined at an angle with respect to a direction perpendicular to the axis.
- the front surface 11 of the retroreflective function member 10 is inclined in the horizontal plane, thereby enabling a road force with high light use efficiency.
- the angle between the side surface 12 functioning as a reflecting surface and the rear surface 14 is 90 °, but the angle slightly changes (within ⁇ 0.5 °) based on the angle 90 °. This makes it possible to adjust the horizontal stop angle (spread angle) of the reflected light.
- the aperture angle (spread angle) in the vertical direction can be adjusted by changing the dimensions of the curvature radii Rl and R2 of the front surface and the rear surface as described above. Independently from the above, by changing the angle between the side surface 12 functioning as a reflecting surface and the rear surface 14, the horizontal diaphragm angle (spread angle) can be adjusted.
- FIGS. 7 to 11 are views similar to FIG. 1 showing another embodiment.
- a plurality of retroreflective function members 10. Each is further divided into an outer thread 1A and an inner set B, and the inclination angle of the retroreflective function members 10 that constitute the outer set A is changed to the inclination angle of the retroreflective function members 10 that constitute the inner set. Smaller than. This configuration example is effective for sharp curves.
- the embodiment shown in FIG. 8 is different from the embodiment shown in FIG. 1 in that the inclination angles of the right and left sets of retroreflective function members 10 are reversed, and the embodiment shown in FIG.
- the left and right sets of retroreflective function members 10 shown in FIG. 8 are further divided into an outer set A and an inner set B.
- the embodiment shown in FIG. 10 is an example in which either the left or right half of the configuration shown in FIG. 1 is configured.
- a pipe-like foot 20 for fixing is provided on the bottom surface of the case 1, and the case 1 has a cross-sectional view taken along the line BB in FIG. It is formed through a small hole 21 communicating with the hollow portion of the foot 20.
- the diameter of the small hole 21 is set to a size that does not allow the adhesive to penetrate and allows air to pass therethrough, and the phosphorescent material 22 is fixed on the upper surface of the case 1 with a transparent adhesive.
- the retroreflective function member according to the present invention can be used not only for a load marker but also for a gaze guidance sign or a guide sign attached to, for example, a guardrail other than the load marker.
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-180724 | 2004-06-18 | ||
JP2004180724 | 2004-06-18 |
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WO2005124402A1 true WO2005124402A1 (ja) | 2005-12-29 |
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PCT/JP2005/010766 WO2005124402A1 (ja) | 2004-06-18 | 2005-06-13 | 再帰反射機能部材およびロードマーカ |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828600B1 (ja) * | 1969-02-10 | 1973-09-03 | ||
JPS60140301A (ja) * | 1983-12-08 | 1985-07-25 | エルヴイーン ズイツク ゲーエムベーハー オブテツク‐エレクトロニーク | 再帰反射器 |
JPS6463901A (en) * | 1987-07-27 | 1989-03-09 | I T W New Zealand Ltd | Reflection mirror apparatus |
JPH02235001A (ja) * | 1989-03-09 | 1990-09-18 | Rainfuaruto Kogyo Kk | 埋設型再帰反射性道路鋲 |
JPH08220315A (ja) * | 1995-02-08 | 1996-08-30 | Nippon Hatsumei Fukiyuu Shinkoukai:Kk | 可変色反射素子 |
WO2004057379A1 (ja) * | 2002-12-19 | 2004-07-08 | Osamu Tsutsui | 再帰反射機能部材および再帰反射ユニット |
JP2005016040A (ja) * | 2003-06-24 | 2005-01-20 | To Company:Kk | 路面用再帰反射部材 |
-
2005
- 2005-06-13 WO PCT/JP2005/010766 patent/WO2005124402A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828600B1 (ja) * | 1969-02-10 | 1973-09-03 | ||
JPS60140301A (ja) * | 1983-12-08 | 1985-07-25 | エルヴイーン ズイツク ゲーエムベーハー オブテツク‐エレクトロニーク | 再帰反射器 |
JPS6463901A (en) * | 1987-07-27 | 1989-03-09 | I T W New Zealand Ltd | Reflection mirror apparatus |
JPH02235001A (ja) * | 1989-03-09 | 1990-09-18 | Rainfuaruto Kogyo Kk | 埋設型再帰反射性道路鋲 |
JPH08220315A (ja) * | 1995-02-08 | 1996-08-30 | Nippon Hatsumei Fukiyuu Shinkoukai:Kk | 可変色反射素子 |
WO2004057379A1 (ja) * | 2002-12-19 | 2004-07-08 | Osamu Tsutsui | 再帰反射機能部材および再帰反射ユニット |
JP2005016040A (ja) * | 2003-06-24 | 2005-01-20 | To Company:Kk | 路面用再帰反射部材 |
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