JP2005105811A - Braille paving tile for visually handicapped people - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braille tile formed from a resin sheet provided with a plurality of projections in the top surface thereof and possible to be strongly adhered to a layout surface, and to provide a method of quickly adhering the braille tiles to the layout surface over a wide temperature range. <P>SOLUTION: In regard to the braille tile formed from a resin sheet, which has a plurality of previously formed projections projected from the top surface thereof and which comprises an acrylic resin, and regard to the method of adhering the braille tiles to a layout surface by using a hardening mixture mainly composed of an acrylic monomer, the braille tile is desirably formed from an acrylic syrup comprising the acrylic resin, an aggregate and a filling material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a Braille tile for the visually impaired and a method for laying the same. More specifically, the present invention relates to a Braille tile for a visually impaired person made of a resin sheet having a plurality of protrusions protruding on the upper surface, and a bonding method thereof.

  On roads, various passages, station platforms, and the like, guide paths are laid using guide blocks (braille blocks) having a plurality of various protrusions in order to notify visually impaired persons of passage conditions. A visually impaired person walks on the Braille block to get a tactile sensation on the sole of the foot, or feels the concavo-convex feeling transmitted from the tip of the cane, so that guidance and warning information is transmitted. Yes.

  As a method of installing the braille block on the laying surface, a method is known in which a rectangular concrete block having a plurality of protrusions on the upper surface is produced in advance in a factory, and this block is embedded in the laying surface of the construction site. . In this method, since it is necessary to excavate the laying surface in order to embed the block, there is a problem that construction work becomes large and requires a lot of time and cost.

  In addition, a method has been proposed in which a line having protrusions projecting directly on a laying surface at a construction site by a construction machine is integrally formed using a heat-meltable paint. In this method, the heat-meltable paint is intermittently discharged from the outlet of the construction machine so that the protrusions are integrally formed. In this method, it is difficult to firmly fix the protrusion on the laying surface.

  Furthermore, as another method of forming protrusions at the construction site, a method of forming a three-dimensional pattern on the surface of the construction surface by casting and curing the curable resin on the construction surface using a mold is known (Japanese Patent Application Laid-Open No. 2005-260707). Sho 60-233264, JP-A-3-235874, etc.). In this method, the resin is injected after attaching the formwork by attaching the formwork with a primer to the construction surface, but it requires skill and time to attach and remove the formwork, and it is on-site construction It has the feature that it is not easy to ensure dimensional stability.

  Also known is a method of manufacturing a planar rectangular resin or synthetic rubber sheet with a plurality of protrusions projecting from the upper surface and affixing the sheet on the laying surface with an adhesive. This method has the advantage that the construction work can be carried out relatively easily. However, in the conventional method, it is technically difficult to apply the sheet so as not to peel off the laying surface made of asphalt or concrete. There was also a problem of poor durability.

JP-A-3-235874

The present inventors do not require complicated and skillful work such as using a formwork at the construction site, and are braille that is firmly attached to the laying surface with good dimensional stability in a short construction work. As a result of intensive research aimed at developing a technique for forming tiles, the present invention has been achieved.
An object of this invention is to provide the braille tile which can be firmly affixed on a laying surface.
Another object of the present invention is to provide a method of forming a braille tile that is dimensionally stable and firmly attached to a laying surface without using a formwork at a construction site.
An object of the present invention is to provide a braille tile firmly attached to a laying surface.

The present invention provides a braille tile made of a resin sheet having a plurality of protrusions on the upper surface, which can be firmly attached to a laying surface with good dimensional stability.
The present invention further provides a method of bonding a braille tile made of a resin sheet having a plurality of protrusions on its upper surface to a laying surface quickly and with excellent adhesion reliability.
The present invention also provides a Braille tile comprising a resin sheet having a plurality of protrusions protruding on the upper surface firmly adhered to the laying surface.

  The present invention provides a braille tile comprising a resin sheet formed by including an acrylic resin, and having a plurality of protrusions protruding on the upper surface.

  The Braille tile, in which the resin sheet is obtained by curing a curable mixture mainly composed of an acrylic monomer, is a preferred embodiment of the present invention.

  The Braille tile, in which the curable mixture mainly composed of the acrylic monomer is an acrylic syrup containing at least an acrylic monomer, a polyfunctional monomer, and a polymer component, is a preferred embodiment of the present invention.

  The Braille tile in which the polyfunctional monomer is an acrylic monomer or a vinyl monomer having two or more double bonds in the molecule is a preferred embodiment of the present invention.

  The Braille tile according to the present invention, wherein the acrylic monomer or vinyl monomer having two or more double bonds in the molecule is 0.2 to 15% by weight of the total amount of acrylic monomer or vinyl monomer contained in the acrylic syrup. Is a preferred embodiment.

  The braille tile described above, in which the curable mixture further includes an aggregate and a filler, is a preferred embodiment of the present invention.

  The Braille tile in which the resin sheet is formed by cast molding of a curable mixture mainly composed of an acrylic monomer is a preferred embodiment of the present invention.

  The Braille tile, in which the resin sheet is obtained by molding a thermoplastic acrylic resin, is a preferred embodiment of the present invention.

  The Braille tile in which the molding of the thermoplastic acrylic resin is press molding is a preferred embodiment of the present invention.

  The present invention provides a method for bonding a Braille tile in which the Braille tile is bonded to a laying surface using a curable mixture mainly composed of an acrylic monomer.

  The Braille tile bonding method, wherein the curable mixture is acrylic syrup, is a preferred embodiment of the present invention.

  The present invention provides the Braille tile described above that is bonded to a laying surface using a curable mixture mainly composed of an acrylic monomer as an adhesive.

  The Braille tile described above in which the curable mixture is bonded to a laying surface that is acrylic syrup is a preferred embodiment of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the Braille tile which consists of a resin-made sheet | seat with which several protrusion protruded on the upper surface which can be firmly affixed on a laying surface with sufficient dimension stability by a short construction work is provided.
The Braille tile that is firmly attached to the laying surface can be provided by the Braille tile made of a resin sheet having a plurality of protrusions protruding on the upper surface of the present invention.
According to the present invention, there is provided a method for firmly bonding a braille tile made of a resin sheet having a plurality of protrusions projecting from an upper surface to a laying surface.

The method of adhering the braille tile of the present invention to the laying surface does not require complicated work such as the use of a formwork at the construction site, so that it is possible to lay the braille tile by a simpler work compared to a conventionally known method. It is a method to do.
The method of adhering the braille tile of the present invention to the laying surface is also a method that enables outdoor laying because it can be performed in a wide temperature range.
Furthermore, the method of adhering the braille tile of the present invention to the laying surface is a method that enables laying on the roadway because the bonding can be achieved quickly and with excellent bonding reliability.

The present invention provides a braille tile comprising a resin sheet formed by including an acrylic resin, and having a plurality of protrusions protruding on the upper surface. In addition, the present invention provides a braille tile made of a resin sheet having a plurality of protrusions protruding from the upper surface firmly attached to the laying surface.
The present invention further provides a method of bonding a braille tile made of a resin sheet having a plurality of protrusions on its upper surface to a laying surface quickly and with excellent adhesion reliability.

First, the Braille tile of the present invention will be described.
Braille tiles made of a resin sheet that includes a plurality of protrusions projecting on the upper surface of the present invention and that includes an acrylic resin are pre-molded resin sheets, so use a formwork at the construction site. This makes it possible to lay Braille tiles without the need for complicated work such as.

  The resin-made sheet | seat formed including an acrylic resin means the resin-made sheet | seat in which acrylic resin is contained as a main component. The resin sheet may contain aggregates, fillers, and other additives.

  An acrylic resin refers to a resin obtained using an acrylic monomer. Examples of acrylic resins include resins obtained by curing a curable mixture mainly composed of acrylic monomers and thermoplastic acrylic resins that are thermoplastic resins of acrylic monomers such as polymethyl methacrylate (PMMA). be able to.

  Examples of the resin obtained by curing a curable mixture mainly composed of an acrylic monomer include a resin obtained by curing a curable mixture containing an acrylic monomer and a polyfunctional monomer with a curing agent. Fillers, aggregates, and other additives may be mixed in the curable mixture, and when these are present, a cured product containing an acrylic resin containing them can be obtained.

  As the curable mixture mainly composed of the acrylic monomer, a so-called acrylic syrup in which a homopolymer or copolymer prepolymer or polymer of an acrylic monomer is further contained as a polymer component can be used.

  The polymer component in the acrylic syrup functions to adjust the viscosity of the syrup, but any polymer component other than a homopolymer or copolymer of an acrylic monomer may be used as long as it functions to adjust the viscosity. You can also. The amount of the polymer component in the acrylic syrup is 10 to 40% by weight, preferably about 15 to 30% by weight, based on the total amount of the monomer and the polymer component, and is selected so that the viscosity of the acrylic syrup becomes a desired value. can do.

  Examples of the method of containing a polymer component for preparing an acrylic syrup include, for example, a method of partially polymerizing an unsaturated monomer mainly composed of an acrylic monomer, a homopolymer or a copolymer of an acrylic monomer, and the like. Examples thereof include a method of dissolving a polymer component in a curable mixture.

  By making the curable mixture acrylic syrup, the viscosity can be easily handled. Moreover, organic solvents, such as benzene, toluene, and ethyl acetate, can be used for the purpose of dissolving the components of the curable mixture and adjusting the viscosity. The viscosity of the curable mixture is preferably about 10 to 1000 Pa · s, but is not limited thereto.

As the acrylic monomer, an acrylate monomer such as an acrylic ester or a methacrylic monomer such as a methacrylic ester is preferable. Specifically, as the acrylate monomer, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, lauryl acrylate, etc., and as the methacrylate monomer, Examples thereof include methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, and lauryl methacrylate. Of these, methacrylic acid esters are preferable, and methyl methacrylate is particularly preferable.
In addition to the acrylic monomer, another monomer copolymerizable therewith may be present.

  As an example of a polyfunctional monomer, a monomer having two or more double bonds in the molecule can be given. An acrylic monomer or a vinyl monomer having two or more double bonds in the molecule is preferable. Specifically, divinylbenzene, triallyl isocyanurate, triallyl cyanurate, allyl methacrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) ) Acrylate, polypropylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, divinylbenzene, trimethylolpropane Examples include tri (meth) acrylate, tetramethylolmethane tri (meth) acrylate, tetramethylolmethanetetra (meth) acrylate, and the like.

  The polyfunctional monomer serves as a crosslinking agent to make the cured product into a crosslinked structure, and the physical properties such as compression strength and breaking elongation of the braille tile obtained by selecting the amount and type thereof can be adjusted. The amount of the polyfunctional monomer in the curable mixture is desirably 0.2 to 15% by weight, preferably 1 to 5% by weight, based on the total amount of monomers in the mixture. In addition, when the amount of the crosslinking agent increases, the solvent resistance of the resulting cured product increases. As a result, the adhesive strength of the adhesive tends to decrease. Therefore, the amount of the polyfunctional monomer is selected in consideration of this point. Is desirable.

  In the acrylic syrup component, the acrylic monomer or vinyl monomer having two or more double bonds in the molecule is 0.2 to 15% by weight of the total amount of the acrylic monomer or vinyl monomer contained in the acrylic syrup. Is a preferred embodiment of the present invention.

  Examples of the curing agent include a polymerization initiator such as an organic peroxide or an azo compound, or a redox polymerization catalyst that is a combination of a polymerization initiator and an accelerator. When only a polymerization initiator is used as the polymerization catalyst, the curable mixture can be heated and cured. Further, when a redox polymerization catalyst is used, it can be cured at room temperature or near room temperature.

  Examples of the organic peroxide include dibenzoyl peroxide, dicumyl peroxide, diacetyl peroxide, dicapryl peroxide, dilauroyl peroxide, distearoyl peroxide, t-butyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide and the like.

  Examples of the azo compound include azobisisobutyronitrile and dimethylazobisisobutyrate.

  Examples of the redox polymerization catalyst include a combination of the organic peroxide and a tertiary amine, a ferrous salt, a mercaptan, a naphthenate, or a combination of a persulfate and sodium bisulfite. However, a combination of an organic peroxide and a tertiary amine is particularly preferable.

  Examples of the tertiary amine include N, N-dimethylaniline, N, N-dimethyl-p-toluidine, N, N-di (hydroxyethyl) -p-toluidine, and N, N-di (hydroxyethyl). -M-Toluidine, N, N-di (β-hydroxypropyl) -p-toluidine and the like can be mentioned.

  When using a redox polymerization catalyst, a tertiary amine or the like, which is an accelerator, is added to the curable mixture in advance, and a polymerization initiator such as peroxide immediately before kneading the mixture, aggregate, filler and the like. Curing can be initiated by adding. Alternatively, a method of adding a polymerization initiator to the curable mixture in advance and adding an accelerator immediately before kneading with an aggregate, or a method of adding a polymerization initiator and an accelerator immediately before kneading may be adopted. Good.

  When such a mixing method is employed using a redox catalyst, it starts immediately before kneading the curable mixture with aggregates, fillers, etc., and curing proceeds near room temperature, making it easy to braille tiles of the desired shape Can be molded. The redox polymerization catalyst is an example of a curing agent that can be suitably used.

  The amount of the curing agent used is preferably about 0.1 to 10% by volume based on the curable mixture when the polymerization initiator is used alone, and when the redox polymerization catalyst is used, the above polymerization initiator is used. A proportion of about 0.1 to 5% by volume of an accelerator is further preferred.

  When aggregate is mixed with the curable mixture of the present invention, shrinkage of the shaped braille tile can be reduced and the strength can be improved. The average particle size of the aggregate is usually preferably about 0.5 to 3 mm. Specific examples include hard aggregates such as quartz sand, garnet, emery, chrome scraps, crushed ceramics, and the like. Among these, white ceramics can be preferably used in terms of physical properties such as color tone and wear resistance.

When a filler is mixed with the curable mixture of the present invention, it functions to prevent separation of the resin and aggregate. As a result, scratches, wear, and deformation of the surface of the resulting tile can be reduced, so it is preferable to mix a certain amount of filler with the curable mixture. As the filler, those having an average particle diameter of 0.01 to 50 μm, preferably 0.5 to 5 μm can be preferably used.
Preferred specific examples of the filler include heavy calcium carbonate, talc, alumina powder, bentonite, fine silica, clay and kaolinitic clay such as kaolin, mica, wollastonite, magnesium sulfate, barium sulfate, titanium oxide, titanium Examples thereof include potassium acid and ceviolite. Among these, kaolinitic clay is a preferable filler in terms of the balance between the effect of suppressing the separation of the resin and the aggregate and the increase in viscosity.
The filler may be used after the surface is treated with a coupling agent such as an organic acid or a silane coupling agent for the purpose of improving dispersibility in organic substances.

  It is preferable to mix an aggregate and a filler with the curable mixture of the present invention. Aggregates and fillers are preferably used in a proportion of 30-60% and 1-10%, preferably 35-50% and 2-8%, respectively, by volume with respect to the entire curable mixture. When the aggregate and the filler are in this range, it is possible to prevent the resin and the aggregate from separating and becoming non-uniform, thereby causing undesirable results in terms of physical properties.

  The color of the braille tile can be arbitrarily selected. Any colorant, such as a pigment or dye, can be used for coloring the braille tile. As the pigment, organic pigments such as cyanine blue and inorganic pigments such as titanium oxide and iron oxide can be used, and the addition amount thereof is about 5% by weight or less, more preferably with respect to the curable mixture. It is desirable to be about 4 to 1% by weight.

  When a pigment is used, if the above-mentioned white ceramic is used as an aggregate, the combination of using the white ceramic as an aggregate and the colorant as a pigment is one of preferred embodiments because it has little influence on toning and is easy to use.

  If necessary, the curable composition of the present invention may contain other additives such as an antifoaming agent, a leveling improver, a viscosity adjusting agent, a stabilizer, a plasticizer, and paraffin wax.

  A resin sheet formed by containing an acrylic resin obtained by curing a curable mixture mainly composed of an acrylic monomer can be obtained by molding into a desired shape by a conventionally known molding method. For example, a method of adding a curing agent to the curable mixture, pouring it into a mold before it is cured, and molding by cast molding can be mentioned as a preferred method. The size, thickness, and the like of the resin sheet can be appropriately selected according to the requirements of the environment and purpose of installation.

In order to withstand the practical environment, the Braille tile of the present invention is desired to have a certain level of compressive strength and appropriate elongation. The compressive strength of at least 10 N / mm ² or more, preferably it is desirable 15~50N / mm ^2, more preferably from 30~50N / mm ^2.

  Further, it is desirable that the elongation is a physical property measured for a resin obtained by curing only the curable mixture, and the elongation at break (JIS) is 20% or more, preferably 50 to 400%, more preferably 50 to 200%.

  According to the present invention, it is possible to provide a braille tile having a suitable balance between compressive strength (at room temperature and 60 ° C.) and elongation at break. Preferred compressive strength and elongation at break are acrylic monomers of a curable mixture. The type and amount of the polyfunctional monomer can be adjusted according to the type and amount of additives to be blended if necessary.

  Another example of the acrylic resin is a thermoplastic acrylic resin that is a thermoplastic resin of an acrylic monomer such as polymethyl methacrylate (PMMA). An acrylic resin molded body can be formed by molding a thermoplastic acrylic resin. In molding, it is preferable to mix a filler, an aggregate, and other additives to form a molded body. The molding method can be appropriately selected from conventionally known methods such as injection molding and pressing. Among them, press molding is preferable.

  When molding by press molding, the thermoplastic acrylic resin powder and filler, aggregate, etc. may be dry blended and molded as is, or may be molded after premixing with a Banbury mixer, roll mixer, etc. . The thermoplastic acrylic resin may be appropriately selected from commercially available ones.

  A plurality of protrusions protrude from the upper surface of the resin sheet of the present invention. The shape of the protrusion may be any shape such as a columnar shape, a hemispherical shape, a truncated cone shape, a square or rectangular quadrangular prism shape in plan view, or a truncated quadrangular pyramid shape. Providing such protrusions on the upper surface of the resin sheet provides a suitable Braille tile.

  Next, a method for adhering a braille tile made of a resin sheet having a plurality of protrusions on the upper surface of the present invention to the laying surface will be described.

  The laying surface is an outer surface of a road, various passages, a station platform or the like on which the Braille tiles of the present invention are laid, and is usually made of concrete, terrazzo, asphalt, or the like.

  As a preferable adhesive for adhering the Braille tile of the present invention to the laying surface, a curable mixture mainly composed of the above-mentioned acrylic monomer may be mentioned. As the curable mixture, the acrylic syrup described above is particularly preferable.

  The inventors of the present invention use an acrylic monomer as an adhesive for adhering a braille tile made of a resin sheet having a plurality of protrusions protruding on the upper surface formed from a compound containing the acrylic resin of the present invention to the laying surface. It has been found that the use of a curable mixture comprising a main component, preferably acrylic syrup, enables strong adhesion.

  The curable mixture used for the adhesive is prepared by blending aggregates, fillers and other additives as necessary. The viscosity of the curable mixture mainly composed of an acrylic monomer is suitably about 50 to 1000 mPa · S. When an appropriate amount of a filler or the like is added to the acrylic syrup to form a paste, it becomes easy to apply a certain thickness, so that the viscosity can be appropriately selected according to workability.

  Aggregates, fillers and other additives that can be blended in the curable mixture mainly composed of acrylic monomers used for the adhesive can be appropriately selected from the above examples, and other ones can also be adopted. it can.

  A curable mixture mainly composed of acrylic monomers is mixed with a curing agent and cured. The curing mechanism is similar to the curing described above for the tile. The operation of adhering the braille tile with a curable mixture mainly composed of an acrylic monomer is usually performed in the field. In this case, it is preferable that the curing agent is blended and cured in the field.

  An excellent effect is obtained that the Braille tile of the present invention is firmly bonded to the laying surface by the curable mixture. The reason is that the adhesive and tile are of the same quality and are highly compatible, so the adhesive partially swells or compatibilizes on the surface layer of the tile that touches the adhesive, and then hardens and integrates. Presumed to be adhered.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | work which adhere | attaches the braille tile which consists of a resin-made sheet | seat which protruded the some protrusion on the upper surface to a laying surface can be implemented in a wide temperature range. The place where the Braille tiles are applied can be selected from a wide variety of places such as sidewalks and roadways, various passages, and station platforms.

  When the braille tile is bonded to the laying surface, the environment varies greatly depending on the application location and season. For example, the road surface may rise to 60-70 ° C. in summer and may drop below freezing in winter. Since the present invention provides a braille tile and a bonding method applicable to such a wide environment, it is possible to perform laying work particularly outdoors. Furthermore, all-season construction is possible.

  The adhesive used for bonding the braille tile of the present invention is fast-curing. Therefore, the work can be performed efficiently, and the traffic interruption time associated with the work can be minimized in the laying work on the road.

  Next, the operation | work which adhere | attaches the braille tile of this invention on a laying surface is demonstrated. As an adhesive material, it demonstrates using the acrylic syrup which is a preferable aspect of the curable mixture which has an acrylic monomer as a main component.

  Usually, the laying surface of concrete, terrazzo, asphalt or the like is not flat, but has irregularities, and therefore the work of adjusting the base to flat with a base adjustment material is performed. The ground adjustment material is thinly applied using a trowel or spatula so that the laying surface becomes flat. As the base material, it is possible to use a commonly used base material, but acrylic syrup, which is the adhesive of the present invention, or resin mortar containing an aggregate or filler is used as the base material. May be.

  After the base material is dried or cured, acrylic syrup is used as an adhesive material and applied to the base surface using a roller, a glue spatula, or the like. When the viscosity of the acrylic syrup used for the adhesive is about 50 to 1000 mPa · S as described above, it becomes easy to apply a certain thickness as a paste. As described above, the acrylic syrup is preferably mixed with a curing agent or a curing accelerator before coating, and then the coating operation is performed.

The appropriate amount of the adhesive applied varies depending on the unevenness of the base, but it is usually about 200 to 2000 g / m ² , preferably 400 to 1500 g from the viewpoint that the adhesive interface is evenly distributed and excess adhesive does not protrude. / M ² , more preferably 400 to 800 g / m ² .

  After the adhesive material is applied, the braille tile is placed on the adhesive material surface at a predetermined position, and the adhesion is completed by curing the adhesive material. At that time, after placing the braille tile, a stronger bond can be obtained by pressing the braille tile with a roller or the like.

  The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to these examples.

(Example 1)
1. Molding of Braille tiles 200 g of methyl methacrylate as acrylic monomer, 40 g of n-butyl methacrylate, 20 g of 1,4-butanediol dimethacrylate as polyfunctional acrylic monomer, polymethyl methacrylate (trade name Delpet 60N as acrylic polymer) Asahi Kasei Co., Ltd.) 300 g, 50 g of di-2-ethylhexyl phthalate as plasticizer, 3 g of paraffin wax (melting point 52 ° C.), 3 g of dimethylparatoluidine are mixed and heated and stirred at 60 ° C. to prepare acrylic syrup A. Prepared.
200 g of the resulting acrylic syrup A, 20 g of yellow powder pigment (PG-101 manufactured by Mitsui Chemicals Co., Ltd.), and white aggregate as an aggregate (trade name Color Serben White 3-2 m / m Japanese silver sand ( 350 g) and 40 g of kaolinite clay (trade name: Actidyl MAM, German Hoffman Mineral Co., Ltd., average particle size 2 μm, density 2.6 g / cc) as a filler. To obtain Formulation A.
15 g of a commercially available 50% concentration benzoyl peroxide powder dilution as a curing agent is added to the blend and sufficiently stirred and dissolved, poured into a mold at room temperature and cured, and has a vertical projection with four rectangular protrusions in the same direction. A braille tile having a projection of 5 mm, a width of 27 mm, and a length of 290 mm (conforming to JIS T9251) was formed.

2. Preparation of adhesive material To the above acrylic syrup A1 kg, a gray powder pigment (PG-505 50 g, Mitsui Chemicals Co., Ltd.) and bentonite filler (AV 50 g, Mitsui Chemicals Co., Ltd.) are sufficiently added. The mixture was stirred to obtain an adhesive A.

3. Braille tile installation work On a road surface paved with ordinary asphalt concrete, a rectangular construction site with a width of 340 mm and a length of 3.2 m was set by covering the periphery with adhesive tape.
After cleaning the construction site with a vacuum cleaner, 2 kg of adhesive A 2 was put in a pail, 60 g of commercially available 50% concentration benzoyl peroxide was added and sufficiently stirred and dissolved by a hand mixer. Immediately supplied to the construction site, the adhesive was rubbed with a gold lever, and after filling the unevenness, the remaining adhesive was spread evenly with a comb.
Next, the above 1. The braille tiles molded in step 1 were immediately placed on the adhesive material and affixed so as to lightly press. Subsequently, a total of 10 braille tiles were installed in a straight line. After 1 hour, the adhesive was cured and the adhesive tape was peeled off.

4). Confirmation of adhesion Use a diamond cutter on the braille tiles that have been constructed, and insert a notch that reaches the base asphalt of 30 mm wide and 60 mm long from the edge of the tile. I applied it with a hammer and peeled it off. Although peeling was performed at four locations, the surface layer portion of the base asphalt was destroyed and peeling occurred.
There was no peeling at the interface between the adhesive and the tile.

(Example 2)
250 g of polymethyl methacrylate (Kuraray Co., Ltd., G1000P), 20 g of yellow powder pigment (PG-101, Mitsui Chemicals Co., Ltd.), white aggregate as an aggregate (trade name Color Serben White 3- 2 g / m Nippon Silver Sand Co., Ltd.) (500 g) was dry blended in a polyethylene bag and blended to obtain Formulation B.
Formulation B is uniformly fed into a metal mold, and is cooled by applying a pressure of 50 MPa for 4 minutes at 200 ° C. with a press molding machine. A braille tile having a length of 300 mm and a width of 300 mm, a protrusion having a height of 5 mm, a width of 27 mm, and a length of 290 mm (conforming to JIS T9251) was formed.

Since the Braille tile made of a resin sheet formed by including an acrylic resin having a plurality of protrusions protruding from the upper surface of the present invention is a pre-formed resin sheet, the present invention forms a frame at a construction site. It is possible to lay Braille tiles that are dimensionally stable and firmly attached to the laying surface in a short period of time without the need for complicated work such as using a.
According to the present invention, a braille tile including a resin sheet having a plurality of protrusions protruding on an upper surface firmly bonded to a laying surface is provided.
According to the present invention, there is provided a method for firmly bonding a braille tile made of a resin sheet having a plurality of protrusions projecting from an upper surface to a laying surface.

The method of adhering the braille tile of the present invention to the laying surface is a method that enables outdoor laying because it is a method that can be performed in a wide temperature range.
Furthermore, the method of adhering the braille tile of the present invention to the laying surface is a method that enables laying on the roadway because the bonding can be achieved quickly and with excellent bonding reliability.

Claims (15)

  A Braille tile made of a resin sheet that includes a plurality of protrusions protruding from the upper surface and includes an acrylic resin.   The Braille tile according to claim 1, wherein the resin sheet is obtained by curing a curable mixture mainly composed of an acrylic monomer.   The Braille tile according to claim 2, wherein the curable mixture mainly composed of the acrylic monomer is an acrylic syrup containing at least an acrylic monomer, a polyfunctional monomer, and a polymer component.   The Braille tile according to claim 3, wherein the polyfunctional monomer is an acrylic monomer or a vinyl monomer having two or more double bonds in the molecule.   The acrylic monomer or vinyl monomer having two or more double bonds in the molecule is 0.2 to 15% by weight of the total amount of the acrylic monomer or vinyl monomer contained in the acrylic syrup. 4. Braille tile according to 4.   The braille tile according to claim 1, wherein the curable mixture further includes an aggregate and a filler.   The braille tile according to claim 6, wherein the filler is inorganic fine particles having an average particle diameter of 0.01 to 50 μm.   Braille tile according to claim 7 or 8, characterized in that the aggregate and filler are 30-60% and 1-10% respectively by volume with respect to the curable mixture.   The Braille tile according to any one of claims 2 to 8, wherein the resin sheet is formed by cast molding of a curable mixture mainly composed of an acrylic monomer.   The Braille tile according to claim 1, wherein the resin sheet is obtained by molding a thermoplastic acrylic resin.   The braille tile according to claim 10, wherein the molding is press molding.   The adhesion method of the Braille tile which adhere | attaches the Braille tile in any one of Claims 1-11 on a laying surface using the curable mixture which has an acrylic monomer as a main component.   The bonding method according to claim 12, wherein the curable mixture is acrylic syrup.   The braille tile according to any one of claims 1 to 11, wherein the braided tile is adhered to a laying surface using a curable mixture mainly composed of an acrylic monomer as an adhesive.   The braille tile according to claim 14, wherein the curable mixture is acrylic syrup.