JPH053528Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a soundproof wall used for roads, railways, etc.

[Summary of the invention] This invention is a soundproof wall used for roads or railways, which selectively scatters only incident light within a predetermined angle range with respect to the film, and transmits incident light at other angles. A light control film is applied to a transparent plastic or glass surface or between transparent plastic or glass, and is particularly suitable for use on elevated roads or railways from cars, trains, or people walking on elevated roads or railways. This was to prevent people from looking into the inside of the house below. Furthermore, although this soundproof wall blocks views of elevated roads or railroad tracks, it allows views in other directions, so it can be used in scenic locations.

[Prior Art] Conventional soundproof walls are transparent and allow views from all angles.

[Problems to be Solved by the Invention] The conventional soundproof walls as described above are already widely used on roads or railways, particularly on elevated roads or railways. However, recently, the following problems have been pointed out regarding such soundproof walls.

That is, it is impossible to maintain privacy because the inside of a house, especially located under an elevated road or railroad tracks, can be seen by running cars, trains, or people walking.

Furthermore, if an opaque soundproof wall is used to protect privacy, the scenery will not be visible to moving cars, trains, or people walking, which is a problem, especially in scenic areas.

This invention focuses on the above-mentioned problems with conventional soundproof walls, and is designed to protect the privacy of houses under roads or railroad tracks, and to prevent moving cars, trains, and pedestrians from seeing the scenery. It was designed so that it could be done.

[Means for solving the problem] The soundproof wall according to the present invention is a light control film that selectively scatters only incident light within a predetermined angle range with respect to the film, and transmits incident light at other angles. is applied to the surface of transparent plastic or glass, or between transparent plastic or glass, and can be seen only within a certain angular range, for example, within a range of 10° to 90° downward when measured from the direction perpendicular to the soundproof wall. Create a soundproof wall that cannot be used.

In addition, the light control film used in the present invention is obtained by curing a resin composition consisting of an oligomer and a monomer, or monomers each having a difference in refractive index, and is preferably a photopolymerizable film having a difference in refractive index. It is obtained by irradiating and curing a resin composition consisting of an oligomer and a photopolymerizable monomer or photopolymerizable monomers together with ultraviolet rays, but the angular dependence depends on the irradiation angle of ultraviolet rays, the difference in the refractive index of the resin composition, etc. It is determined accordingly. The thickness of the light control film used in the present invention is 20 to 2000 μm. The manufacturing method of this light control film was previously disclosed in a patent application by the present inventors, Japanese Patent Application No. 1983-302500 (filed on December 18, 1988, "Light control board and its manufacturing method"), and a patent application filed in Showa Filed on June 11, 1962, "Light control board and its manufacturing method"
It is described in.

Further, the transparent plastic plate used in the present invention is not particularly limited as long as it is transparent, and any transparent plastic plate can be used. Suitable examples include polycarbonate resin, acrylic resin, methacrylic resin, and polystyrene resin. Moreover, a float glass plate can be used as the glass plate used in the present invention.

Further, in the present invention, the method of attaching the light control film and the transparent plate such as transparent plastic or glass plate is not particularly limited, and any known method can be used. For example, as shown in FIG. 3, a light control film 1 is placed on the surface of a glass plate or transparent plastic 2.
As shown in FIG. 4, the light control film 1 may be sandwiched between glass plates or transparent plastics 2, 2', or as shown in FIG. ’ between the light control film 1
A plastic plate 3 may be further bonded to the outer surface of the glass plate. Preferably, the outer surface of the plastic board is provided with a scratch-resistant coating.

[Effects of the invention] If the soundproof wall of the invention is used, cars and trains running on the elevated road or railroad tracks, or people walking on the elevated road or railroad tracks, will not be able to see into the inside of the house. Furthermore, although this soundproof wall blocks the view of the elevated road or railroad, it allows views in other directions, so it can be used in scenic locations.

[Example] Next, an example of the soundproof wall of the present invention will be described with reference to the drawings.

Tribromophenoxyethyl acrylate (refractive index 1.567) 100 parts per 100 parts polyether urethane acrylate (refractive index 1.481) obtained by the reaction of polypropylene glycol with an average molecular weight of 2000, toluene diisocyanate and 2-hydroxyethyl acrylate A resin composition containing 6 parts of benzyl dimethyl ketal and 6 parts of benzyl dimethyl ketal was injected between 60 cm square glass plates with a 1 mm thick spacer in between. Two high-pressure mercury lamps (80 W/cm, 2 kW, emission diameter approximately 2 cm, emission length 25 cm, manufactured by Ushio Electric) were installed in parallel at an angle of 60 degrees, and ultraviolet rays were irradiated for 1 minute to obtain a cured sheet. The resulting cured sheet has a thickness of 10 to 90 on one side from the vertical direction.
When viewed from a certain angle, it was cloudy, but when viewed from other angles, it was transparent. FIG. 6 shows the turbidity measurement results for this cured sheet.

Figure 1 shows that the soundproof wall of the present invention is used on an elevated road so that the predetermined angle range is within the range of 10° to 90° downward when measured from the inside in a direction perpendicular to the soundproof wall. This is the situation. That is, the direction below the elevated road cannot be seen because the soundproof walls are scattered.

However, in other directions, the soundproof walls are transparent and visible. FIG. 2A shows a state in which light rays having an incident angle other than 10 to 90 degrees on one side are directly transmitted through the light control film used in the present invention. FIG. 2B shows the state in which light rays having an incident angle of 10 DEG to 90 DEG on one side of the film are scattered.

[Brief explanation of the drawing]

FIG. 1 shows the situation in which the soundproof wall of the present invention is used, and FIG. 2 shows the light transmission state of the light control film used in the present invention. Further, FIGS. 3 to 5 show specific examples of cross-sectional views of the soundproof wall of the present invention. Furthermore, FIG. 6 shows a specific example of the angle dependence characteristic diagram of the film. Explanation of symbols, a... Soundproof wall according to the present invention, ○...
...I can see it, ×...I can't see it.

Claims (1)

[Claims for Utility Model Registration] 1. A light control film that selectively scatters only incident light within a predetermined angle range with respect to the film and transmits incident light at other angles is attached to the surface of a transparent plate. , or a soundproof wall having a laminate interposed between a plurality of transparent plates. 2. The soundproof wall according to claim 1, wherein the predetermined angular range is within a range of 10° to 90° downward when measured from the inside in a direction perpendicular to the soundproof wall. 3. The soundproof wall according to claim 1, wherein the film is obtained by curing a resin composition comprising oligomers and monomers or monomers each having a different refractive index. 4. A claim for utility model registration where the film is obtained by curing a resin composition consisting of a photopolymerizable oligomer and a photopolymerizable monomer or monomers each having a different refractive index by irradiating ultraviolet rays. Soundproof walls as described in Scope 1.