JP6761753B2 - Sign board - Google Patents

Description

The present invention relates to a sign plate capable of suppressing deterioration of visibility of a sign caused by a difference in irradiated light.

Sign boards used outdoors, such as road signs, may be exposed to sunlight from the back side as back rays in the morning and evening. When the back light is irradiated from the back side of the sign board, the surface of the sign board becomes dark, and it may be difficult to read the sign consisting of characters and figures written on the surface of the sign board. Patent Document 1 below discloses a sign plate capable of suppressing a decrease in visibility of a sign due to such a back light.

Patent Document 1 below discloses a backlit sign board in which a large number of slits are formed in a portion where characters or figures are written. In the sign plate disclosed in Patent Document 1, the back light passes through a large number of slits, so that the periphery of the large number of slits looks bright even when the back light is irradiated from the back side. Deterioration of visibility can be suppressed.

Japanese Unexamined Patent Publication No. 2003-261913

However, in the sign plate disclosed in Patent Document 1, the light emitted from the surface side also passes through the slit. Therefore, for example, when the headlight is irradiated from the surface side at night, the light that reaches the slit of the sign plate passes through the slit. In such a portion where the light emitted from the surface side passes through, it becomes difficult to visually recognize the marking on the surface. As described above, in the sign plate disclosed in Patent Document 1, the visibility of the marking may differ depending on the difference in the emitted light.

Therefore, an object of the present invention is to provide a sign plate capable of suppressing deterioration of visibility of a sign caused by a difference in irradiated light.

In order to solve the above problems, the marker plate of the present invention is overlapped with a substrate having a through hole whose opening shape is a character or a figure from the surface side of the substrate so as to overlap the opening and the edge of the opening. A plurality of retroreflective elements comprising a retroreflective member, the retroreflective member transmits light radiated from the back surface side of the substrate through the through hole, and retroreflects light radiated from the front surface side. It is characterized by having.

In the above-mentioned sign board, when sunlight or the like is irradiated as a forward ray in the daytime, the portion provided with the retroreflective member can be visually recognized as a sign. Further, when the surface of the marker plate is irradiated with light such as a headlight at night, the retroreflective member retroreflects the light, so that the portion where the retroreflective member is provided can be visually recognized as a sign. Further, when sunlight or the like is irradiated from the back surface side of the substrate as a back light, the light passes through the through hole formed in the substrate and passes through the retroreflective member superposed on the through hole, so that the marking can be visually recognized. can do. At this time, since the light passing through the through hole is diffracted on the surface side of the substrate, a slightly wider range than the opening of the through hole provided in the substrate looks bright when the sign plate is viewed from the surface side. As described above, in the above-mentioned sign plate, the marking can be easily visually recognized regardless of the direction in which the light is irradiated, and the deterioration of the visibility of the marking caused by the difference in the irradiated light can be suppressed.

In the present invention, the transmission of light means that the incident light is transmitted at a rate of 10% or more and 100% or less.

Further, a space forming layer that is in contact with a part of the plurality of retroreflective elements and is not in contact with the other part is further provided on the substrate side of the plurality of retroreflective elements, and the plurality of space forming layers are provided by the space forming layer. It is preferable that a space is formed on the substrate side of the retroreflective element.

By forming a space on the substrate side of the plurality of retroreflective elements, the difference in refractive index at the interface of the plurality of retroreflective elements on the substrate side tends to be large. Therefore, in the plurality of retroreflective elements, the light emitted from the back surface side of the substrate through the through hole is easily transmitted, and the light emitted from the front surface side is easily reflected.

Further, it is preferable that the plurality of retroreflective elements are exposed on the through hole side.

Since the plurality of retroreflective elements are exposed on the through hole side, the light emitted from the back surface side of the substrate easily reaches the plurality of retroreflective elements through the through holes. Further, since the plurality of retroreflective elements are exposed on the through-hole side, the interface on the through-hole side of the plurality of retroreflective elements is in contact with air, and the difference in refractive index at the interface is likely to be large. Therefore, in the plurality of retroreflective elements, the light emitted from the back surface side of the substrate through the through hole is easily transmitted, and the light emitted from the front surface side is easily reflected.

Further, it is preferable that a colored substance is attached to a part of the plurality of retroreflective elements at a portion overlapping the through hole.

When the colored substance adheres to the plurality of retroreflective elements, the colored substance stands out when the sign plate is viewed from the surface side, so that the marking by the retroreflective member becomes easily visible. Further, by adhering the colored substance only to a part of the plurality of retroreflective elements, it is possible to suppress the retroreflection by the retroreflective element from being hindered by the colored substance.

Further, it is preferable that the substrate includes a substrate main body and a resin layer provided on the surface of the substrate main body.

The resin layer provided on the surface of the substrate can be, for example, a colored layer or a layer having a plurality of retroreflective elements. By providing a colored layer on the surface of the substrate, it becomes easier to make the marking by the retroreflective member more conspicuous. Further, by providing a layer having a plurality of retroreflective elements on the surface of the substrate, the entire marker plate can be easily visually recognized when the headlight is irradiated at night.

As described above, according to the present invention, there is provided a sign plate capable of suppressing deterioration of visibility of a sign caused by a difference in irradiated light.

It is a top view which looks at the sign board which concerns on 1st Embodiment of this invention from the surface side. It is sectional drawing along the line II-II of the sign board shown in FIG. It is sectional drawing which shows the sign board which concerns on 2nd Embodiment of this invention from the same viewpoint as FIG. It is sectional drawing which shows the sign board which concerns on 3rd Embodiment of this invention from the same viewpoint as FIG. 5 (A) to 5 (C) are cross-sectional views illustrating the manufacturing process of the retroreflective member shown in FIG. It is sectional drawing which shows the sign board which concerns on 4th Embodiment of this invention from the same viewpoint as FIG.

Hereinafter, embodiments for carrying out the sign board according to the present invention will be illustrated together with the accompanying drawings. The embodiments illustrated below are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. The present invention can be modified or improved from the following embodiments without departing from the gist thereof.

(First Embodiment)
FIG. 1 is a plan view of the sign plate according to the first embodiment of the present invention as viewed from the surface side. FIG. 2 is a cross-sectional view taken along the line II-II of the sign plate shown in FIG.

As shown in FIGS. 1 and 2, the sign plate 1 of the present embodiment has a substrate 10, a retroreflective member 20, and a back surface protective layer 30.

The substrate 10 has a substrate main body 16 and a resin layer 15 provided on the surfaces of the substrate main body 16. Further, the substrate 10 has a through hole 10H in which the shape of the opening is a character or a figure. The through hole 10H penetrates the substrate main body 16 and the resin layer 15. As shown in FIG. 1, the substrate 10 of the present embodiment has a through hole 10H whose opening shape is an arrow.

The substrate main body 16 is a plate-shaped portion, and is made of, for example, a metal such as aluminum or a resin. The rigidity of the substrate 10 is ensured by the substrate body 16. The substrate main body 16 may be formed of a single plate-shaped body, or may be formed by connecting a plurality of plate-shaped bodies.

The resin layer 15 of the present embodiment has an adhesive layer 11, a space forming layer 12, a retroreflective layer 13, and a colored layer 14.

The pressure-sensitive adhesive layer 11 is provided on the side of the substrate main body 16 most of the resin layers 15, and is a layer containing a pressure-sensitive adhesive for attaching the resin layer 15 to the substrate main body 16. Examples of the material constituting the pressure-sensitive adhesive layer 11 include acrylic resin, epoxy resin, phenol resin, vinyl acetate resin, nitrile rubber resin, silicone rubber resin and the like.

The retroreflective layer 13 has a plate-shaped holding body portion 13b and a plurality of retroreflective elements 13a provided on the holding body portion 13b. The plurality of retroreflective elements 13a are formed on the back surface side of the marker plate 1 in the holding body portion 13b. The retroreflective layer 13 retroreflects light incident from the holding body portion 13b side at the interface between the retroreflective element 13a and the space formed by the space forming layer 12 described later by totally internally reflecting the light. The plurality of retroreflective elements 13a are not particularly limited as long as they have a reflecting surface suitable for retroreflective the incident light. For example, it is preferable that a polyhedron such as a triangular pyramid is used as the retroreflective element 13a and arranged in a close-packed form.

As the material constituting such a retroreflective layer 13, a material having excellent optical characteristics is preferable. For example, polycarbonate resin, vinyl chloride resin, vinylidene fluoride resin, acrylic resin, epoxy resin, styrene resin, polyester resin, fluorine resin, polyethylene resin, olefin resin, cellulose resin, urethane. Examples include based resins. In particular, vinylidene fluoride resin and acrylic resin are preferable.

Examples of vinylidene fluoride-based resins include polyvinylidene fluoride, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoropropylene copolymer, and vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer. , Fluoridene-tetrafluoroethylene-propylene copolymer, vinylidene fluoride-tetrafluoroethylene-perfluoro (methyl vinyl ether) copolymer and the like.

Examples of the acrylic resin include polymethyl methacrylate resin, ethyl polymethacrylate resin, propyl polymethacrylate, butyl polymethacrylate, methyl polyacrylate, ethyl acrylate, propyl polyacrylate, butyl polyacrylate, and poly. Examples thereof include diethylhexyl acrylate.

From the viewpoint of improving the weather resistance and flexibility of the retroreflective layer 13, the retroreflective layer 13 is preferably composed of a resin composition containing a vinylidene fluoride resin and an acrylic resin. By forming the retroreflective layer 13 with a resin composition containing a vinylidene fluoride resin having excellent weather resistance and an acrylic resin having excellent flexibility, the retroreflective layer 13 can be provided with excellent weather resistance and flexibility. .. The holding body portion 13b and the plurality of retroreflective elements 13a may be integrally molded, or may be integrally formed after being formed separately.

The space forming layer 12 is a layer arranged to face the surface of the retroreflective layer 13 on the retroreflective element 13a side, and is a plate-shaped plate-shaped portion 12a extending parallel to the surface of the substrate main body 16. In addition, it has a plurality of connecting portions 12b formed so as to project from the plate-shaped portion 12a toward the retroreflective layer 13. The space forming layer 12 forms a space between the plurality of retroreflective elements 13a and the plate-shaped portion 12a by coupling the plurality of coupling portions 12b with the retroreflective layer 13. That is, the space forming layer 12 forms a space on the substrate 10 side of the plurality of retroreflective elements 13a by being in contact with a part of the plurality of retroreflective elements 13a and not in contact with the other part.

Examples of the material constituting such a space forming layer 12 include a resin similar to the retroreflective layer 13. When the adhesion to the retroreflective layer 13 is further enhanced, the space forming layer 12 is preferably formed from a resin composition containing a resin similar to the resin contained in the retroreflective layer 13. The space forming layer 12 may further contain additives such as a colorant and a modifier.

The colored layer 14 is formed on the outermost surface of the resin layer 15, and is colored in a color in accordance with laws and regulations such as blue and green according to the use of the sign plate 1, and characters and figures marked by the retroreflective member 20. It may be colored to an appropriate color as the ground color for easy viewing. Further, the colored layer 14 transmits light so that at least a part of the light incident from the surface side reaches the retroreflective layer 13 and is retroreflected by the retroreflective layer 13 and emitted. Examples of the material constituting such a colored layer 14 include a resin composition or a paint obtained by mixing a colorant with a resin similar to the resin constituting the retroreflective layer 13.

The retroreflective member 20 is overlapped from the surface side of the substrate 10 so as to overlap the opening on the surface side of the through hole 10H of the substrate 10 and the edge of the opening. The ratio (d1 / d2) of the width d1 of the opening on the surface side of the through hole 10H to the width d2 of the retroreflective member 20 can be, for example, 0.2 or more and 0.9 or less, and is 0.4 or more. It is preferably 0.6 or more, and more preferably 0.6 or more. Further, the retroreflective member 20 of the present embodiment has a pressure-sensitive adhesive layer 21, a space forming layer 22, a retroreflective layer 23, a surface protective layer 24, and a coloring substance 25.

The pressure-sensitive adhesive layer 21 is provided on the substrate 10 side of the retroreflective members 20, and is a layer for attaching the retroreflective member 20 to the substrate 10. Examples of the material constituting such the pressure-sensitive adhesive layer 21 include the same materials as the pressure-sensitive adhesive layer 11.

The retroreflective layer 23 has a plate-shaped holding body portion 23b and a plurality of retroreflective elements 23a provided on the holding body portion 23b. The plurality of retroreflective elements 23a are formed on the back surface side of the marker plate 1 in the holding body portion 23b. Further, in the retroreflective layer 23 of the present embodiment, some of the retroreflective elements 23a of the plurality of retroreflective elements 23a are exposed to the through hole 10H side and come into contact with the air, and the other part forms a space described later. In contact with air in the space formed by the layers 12. The retroreflective layer 23 retroreflects the light incident from the holder portion 23b side at the interface between the retroreflective element 23a and the air by totally internally reflecting the light. The plurality of retroreflective elements 23a are not particularly limited as long as they have a reflecting surface suitable for retroreflective the incident light. For example, it is preferable that a polyhedron such as a triangular pyramid is used as the retroreflective element 23a and arranged in a close-packed form. As a material constituting such a retroreflective layer 23, the same material as the retroreflective layer 13 can be mentioned.

The space forming layer 22 is a layer arranged to face the surface of the retroreflective layer 23 on the retroreflective element 23a side, and is formed at a portion of the retroreflective member 20 that overlaps with the edge of the opening of the through hole 10H. .. The space forming layer 22 includes a plate-shaped plate-shaped portion 22a extending parallel to the surface of the substrate main body portion 16 and a plurality of connecting portions 22b formed so as to project from the plate-shaped portion 22a toward the retroreflective layer 23. Have. The space forming layer 22 forms a space between the plurality of retroreflective elements 23a and the plate-shaped portion 22a by coupling the plurality of coupling portions 22b with the retroreflective layer 23. That is, the space forming layer 22 forms a space on the substrate 10 side of the plurality of retroreflective elements 23a by being in contact with a part of the plurality of retroreflective elements 23a and not in contact with the other part. As a material for forming such a space forming layer 22, the same material as the space forming layer 12 can be mentioned. However, the space forming layer 22 of the present embodiment is colored in a color suitable for marking by the retroreflective member 20. For example, the space forming layer 22 is colored white.

The surface protective layer 24 is a layer that covers and protects the outermost surface of the retroreflective member 20. The surface protective layer 24 of the present embodiment covers the surface of the holding body portion 23b of the retroreflective layer 23. The surface protective layer 24 is made of a material that transmits light, and examples of the material that constitutes the surface protective layer 24 include the same materials as those of the retroreflective layer 13.

The colored substance 25 is a colored substance that is attached to a part of the plurality of retroreflective elements 23a at a portion that overlaps with the through hole 10H of the retroreflective member 20. The coloring substance 25 can be composed of a part of the bonding portion 22b as described later.

The back surface protective layer 30 is a layer that protects the back surface of the substrate 10. Examples of the material constituting the back surface protective layer 30 include the same materials as those of the surface protective layer 24.

The sign plate 1 of the present embodiment is manufactured, for example, as described below. First, after preparing the substrate 10 on which the through hole 10H is not formed, the through hole 10H having an opening having a shape matching the figure or character to be marked is formed. Next, a laminated sheet in which the pressure-sensitive adhesive layer 21, the space forming layer 22, the retroreflective layer 23, and the surface protective layer 24 are laminated is prepared, and the pressure-sensitive adhesive layer 21 is attached to the substrate 10. After that, the retroreflective member 20 is formed by removing the adhesive layer 21 and the space forming layer 22 at the portion of the laminated sheet that overlaps with the through hole 10H. When the space forming layer 22 is removed in this way, a part of the bonding portion 22b that remains attached to the retroreflective layer 23 can be used as the coloring substance 25.

Next, the action and effect of the labeling plate 1 of the present embodiment will be described.

In the sign plate 1 of the present embodiment, when sunlight or the like is irradiated as a forward ray in the daytime, the portion where the retroreflective member 20 is provided can be visually recognized as a sign. From the viewpoint of making the marking by the retroreflective member 20 easier to see, it is preferable that the color or material is different between the marking portion and the periphery of the marking portion. For example, it is preferable that the color or material is different between the retroreflective member 20 and the edge of the opening of the through hole 10H on the surface of the substrate 10.

Further, when the surface of the marker plate 1 is irradiated with light such as a headlight at night, the retroreflective member 20 retroreflects the light so that the portion where the retroreflective member 20 is provided is visually recognized as a marker. Can be done. Further, when sunlight or the like is irradiated from the back surface side of the substrate 10 as a back light, the light is transmitted through the through hole 10H formed in the substrate 10 and the retroreflective member 20 superposed on the through hole 10H. , The sign can be visually recognized. At this time, since the light passing through the through hole 10H is diffracted on the surface side of the substrate 10, when the sign plate 1 is viewed from the surface side, a slightly wider range than the opening of the through hole 10H provided in the substrate 10 looks bright. As described above, in the sign plate 1, the marking can be easily visually recognized regardless of the direction in which the light is irradiated, and the deterioration of the visibility of the marking caused by the difference in the irradiated light can be suppressed.

Further, in the sign plate 1, since the retroreflective member 20 is attached from the surface side of the substrate 10, it is possible to suppress the deterioration of the visibility of the marking due to the shadow due to the through hole 10H. When the retroreflective member 20 is attached to the back surface side of the substrate 10, the shadow due to the through hole 10H is reflected on the retroreflective member 20 when light is emitted from the front surface side, so that the shadow may reduce the visibility of the marking. is there. Such shadows are considered to be more noticeable as the angle of the observer's line of sight with respect to the normal on the surface of the sign plate 1 increases. Therefore, for example, when the sign board 1 is a road sign, it is considered that the shadow becomes more conspicuous as it approaches the sign board 1. In the sign board 1 of the present embodiment, the formation of shadows as described above is suppressed, so that when the sign board 1 is a road sign, the driver has a long section from a position far from the sign board 1 to a position close to the sign board 1. It becomes easier to see the sign in.

Further, in the marker plate 1, the space is formed on the substrate 10 side of the plurality of retroreflective elements 23a, so that the difference in refractive index at the interface of the plurality of retroreflective elements 23a on the substrate 10 side is likely to be large. Therefore, the plurality of retroreflective elements 23a can easily transmit the light emitted from the back surface side of the substrate 10 through the through hole 10H, and can easily reflect the light emitted from the front surface side.

Further, since the plurality of retroreflective elements 23a are exposed on the through hole 10H side, the light emitted from the back surface side of the substrate 10 easily reaches the plurality of retroreflective elements 23a through the through hole 10H. Further, since the plurality of retroreflective elements 23a are exposed on the through hole 10H side, the interface of the plurality of retroreflective elements 23a on the through hole 10H side is in contact with air, and the difference in refractive index at the interface is likely to be large. .. Therefore, the plurality of retroreflective elements 23a can easily transmit the light emitted from the back surface side of the substrate 10 through the through hole 10H, and can easily reflect the light emitted from the front surface side.

Further, since the colored substance 25 adheres to the plurality of retroreflective elements 23a, the colored substance 25 stands out when the sign plate 1 is viewed from the surface side, so that the marking by the retroreflective member 20 becomes easily visible. Further, by adhering the coloring substance 25 only to a part of the plurality of retroreflective elements 13a, it is possible to suppress the retroreflection by the retroreflective element 23a from being hindered by the coloring substance 25.

Further, by providing the colored layer 14 on the surface of the substrate 10, it becomes easy to make the marking by the retroreflective member 20 more conspicuous. Further, by providing the retroreflective layer 13 having a plurality of retroreflective elements 13a on the surface of the substrate 10, the entire marker plate 1 can be easily visually recognized when the headlight is irradiated at night.

(Second Embodiment)
Next, the second embodiment of the present invention will be described in detail with reference to FIG. The same or equivalent components as those in the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 3 is a cross-sectional view showing the sign plate 2 according to the second embodiment of the present invention from the same viewpoint as in FIG. The marker plate 2 shown in FIG. 3 has the first embodiment in that the pressure-sensitive adhesive layer 21 and the space-forming layer 22 are not removed at a portion of the retroreflective member 20 that overlaps with the through hole 10H formed in the substrate 10. It is different from the sign board 1.

Since the sign plate 2 can be manufactured without going through the step of removing a part of the pressure-sensitive adhesive layer 21 and the space forming layer 22, it can be manufactured more easily than the label plate 1. However, in the labeling plate 2 of the present embodiment, since the pressure-sensitive adhesive layer 21 and the space forming layer 22 overlap with the through hole 10H, the light irradiated from the back surface side of the substrate 10 and passing through the through hole 10H is transmitted through the retroreflective member 20. It is preferable that the pressure-sensitive adhesive layer 21 and the space-forming layer 22 have high light transmittance so as to facilitate the process.

(Third Embodiment)
Next, the third embodiment of the present invention will be described in detail with reference to FIG. The same or equivalent components as those in the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 4 is a cross-sectional view showing the sign plate 3 according to the third embodiment of the present invention from the same viewpoint as in FIG. The sign plate 3 shown in FIG. 4 is different from the sign plate 1 of the first embodiment in that the retroreflective member 20a is provided instead of the retroreflective member 20. The retroreflective member 20a does not include the coloring substance 25, and in addition to the adhesive layer 21, the space forming layer 22, the retroreflective layer 23, and the surface protective layer 24, the retroreflective layer 26, the adhesive layer 27, and the surface protective layer 28 are provided. It differs from the retroreflective member 20 in that it is provided.

The surface protective layer 28 is a layer that protects the outermost surface of the retroreflective member 20a, and is the same layer as the surface protective layer 24. Further, the pressure-sensitive adhesive layer 27 is a layer for attaching the surface protection layer 28 to the surface protection layer 24, and is the same layer as the pressure-sensitive adhesive layer 21. In the retroreflective member 20a of the present embodiment, the retroreflective layer 23 and the surface protective layer 24 are removed at a portion overlapping the through hole 10H, and the retroreflective layer 26 is attached to the adhesive layer 27. The retroreflective layer 26 is a layer similar to the retroreflective layer 23, and has a plate-shaped holding body portion 26b and a plurality of retroreflective elements 26a provided on the holding body portion 26b. In the retroreflective member 20a of the present embodiment, since the coloring substance 25 is not attached to the retroreflective layer 26, the light irradiated from the back surface side of the substrate 10 and passing through the through hole 10H is transmitted through the retroreflective member 20a. It will be easier.

Such a retroreflective member 20a is manufactured, for example, as described below. 5 (A) to 5 (C) are cross-sectional views illustrating the manufacturing process of the retroreflective member 20a shown in FIG. First, as shown in FIG. 5A, a laminate in which the pressure-sensitive adhesive layer 21, the space forming layer 22, the retroreflective layer 23, the surface protection layer 24, the pressure-sensitive adhesive layer 27, and the surface protection layer 28 are laminated is prepared. .. Next, as shown in FIG. 5B, the adhesive layer 21, the space forming layer 22, the retroreflective layer 23, and the surface protective layer 24 are removed from the laminated body at a portion overlapping the through hole 10H. Then, as shown in FIG. 5C, the retroreflective member 20a is obtained by attaching the retroreflective layer 26 to the exposed adhesive layer 27.

(Fourth Embodiment)
Next, the fourth embodiment of the present invention will be described in detail with reference to FIG. The same or equivalent components as those in the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 6 is a cross-sectional view showing the sign plate 4 according to the fourth embodiment of the present invention from the same viewpoint as in FIG. In the sign plate 4 shown in FIG. 4, the opening on the surface side of the through hole 10H is narrowed by the resin layer 15. More specifically, the width of the portion of the through hole 10H formed in the substrate 10 formed in the retroreflective layer 13 and the colored layer 14 becomes narrower than the width of the portion formed in the substrate main body 16. There is. Therefore, the retroreflective member 20 overlaps with the retroreflective layer 13 and the colored layer 14 at a portion overlapping the edge of the opening on the surface side of the through hole 10H, and does not overlap with the substrate main body portion 16. With this configuration, the light emitted from the back surface side of the substrate 10 easily passes through the entire retroreflective member 20.

Although the present invention has been described above by taking the above-described embodiment as an example, the present invention is not limited thereto.

For example, in the above embodiment, the action and effect have been described by exemplifying the case where sunlight is irradiated from the back side of the substrate 10, but the light emitted from the back side of the substrate 10 is other than the light of a fluorescent lamp or the like. The same action and effect can be obtained with the light of. Therefore, the sign board of the present invention can also be applied to an internally illuminated sign board.

Further, the space forming layers 12, 22, the pressure-sensitive adhesive layers 11, 12, 27, the colored layer 14, the back surface protective layer 30, the surface protective layers 24, 28, and the colored substance 25 are not essential components and are appropriately provided. is there. For example, when the colored layer 14 is not provided, the other layer provided in the resin layer 15 may be colored so that the other layer also serves as the colored layer 14. Further, in the above embodiment, the space forming layer 22 is colored by giving an example, but another layer provided in the retroreflective member 20 may be colored.

As described above, according to the present invention, there is provided a sign plate capable of reducing the difference in visibility of the marking caused by the emitted light. The sign board is used in the field of road signs and the like.

1,2,3,4 ... Label plate 10 ... Substrate 10H ... Through holes 11,1,27 ... Adhesive layer 12,22 ... Space forming layer 13,23,26 ... Retroreflective layers 13a, 23a, 26a ... Retroreflective element 14 ... Colored layer 15 ... Resin layer 16 ... Substrate body 20 ... Retroreflective member 24 ... Surface protective layer 25.・ ・ Colored substance 30 ・ ・ ・ Back protective layer

Claims (5)

A substrate having a through hole whose opening shape is a character or a figure,
A retroreflective member stacked from the surface side of the substrate so as to overlap the opening and the edge of the opening.
With
The retroreflective member has a plurality of retroreflective elements that transmit light emitted from the back surface side of the substrate through the through hole and retroreflect light emitted from the front surface side. Board. A space forming layer that is in contact with a part of the plurality of retroreflective elements and is not in contact with the other part is further provided on the substrate side of the plurality of retroreflective elements.
The marker plate according to claim 1, wherein a space is formed on the substrate side of the plurality of retroreflective elements by the space forming layer. The marker plate according to claim 1 or 2, wherein the plurality of retroreflective elements are exposed on the through hole side. The marker plate according to any one of claims 1 to 3, wherein a colored substance is attached to a part of the plurality of retroreflective elements at a portion overlapping the through hole. The marker plate according to any one of claims 1 to 4, wherein the substrate includes a substrate main body portion and a resin layer provided on the surface of the substrate main body portion.

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