JP3738438B2 - Surface block construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a surface layer block in which a surface layer block such as a Braille block is formed on the surface of a metal plate such as a manhole iron cover installed on a road.
[0002]
[Prior art]
Surface layer blocks such as Braille blocks laid on the road are generally manufactured in advance in a factory using concrete, synthetic rubber, vinyl chloride resin, etc., and embedded in road surfaces such as road asphalt or concrete. Pasted and installed.
[0003]
[Problems to be solved by the invention]
On the other hand, it is also proposed to install and install surface layer blocks such as Braille blocks on the road, after placing the formwork material on the road and applying joint material in it, resin mortar etc. The surface layer material is filled, and after the surface layer material is cured, the mold frame material is peeled off to construct the surface layer block. (See, for example, JP-A-7-102681)
However, although this surface layer block construction method can form the surface layer block well on the road surface of the road, braille blocks etc. may also be constructed on the iron cover of the manhole on the road, for example. When braille blocks are formed on the iron lid, the surface of the iron lid has many uneven patterns that form a design pattern, so even if a mold material is used, the resin mortar of the molding material flows out of the recess. There is a problem that the shape of the edge of the surface layer block after molding is deteriorated, and there is a problem that the number of steps in the construction increases.
[0004]
This invention solves the above-mentioned subject, and it aims at providing the construction method of the surface layer block which can be constructed | assembled by a fewer number of processes and can shape | mold a base layer and surface layer into a favorable shape. And
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the surface layer block construction method according to the present invention includes a step of applying a primer to the surface of the metal plate in the surface layer block construction method of forming the surface layer block on the surface of the metal plate having irregularities; The first masking tape is attached to the uneven surface of the metal plate along the periphery of the predetermined range of the surface of the metal plate, and the second masking tape wider than the first masking tape is placed on the first masking tape. A step of covering the first and second masking tapes with a base layer material of resin mortar and flattening and curing the base layer material, and a mold on the cured base layer. And a step of pasting a material and filling and curing a surface layer material of a resin mortar inside the mold material.
[0006]
Here, it is preferable to use the same kind of synthetic resin as the binder for the resin mortar of the base layer material and the binder for the resin mortar of the surface layer material. Moreover, it is good to add a thickener to the resin mortar of a base layer material, and to make it viscosity higher than a surface layer material.
[0007]
In the surface layer block construction method of the present invention, first, a primer is applied to the surface of the metal plate, and then the first masking tape is attached to the uneven surface of the metal plate along the periphery of the predetermined range of the surface of the metal plate. paste. Next, a second masking tape wider than the first masking tape is placed on the first masking tape and pasted. This prevents the base layer material from flowing out of the recess even when there is an uneven pattern on the surface of the metal plate, like an iron lid of a manhole.
[0008]
Next, a base layer material of resin mortar is filled in a portion surrounded by the first and second masking tapes, and the base layer is flattened and cured. Then, a mold material is pasted on the cured base layer, and a surface layer material of resin mortar is filled in the mold material and cured. Using the same type of synthetic resin as the binder for the resin mortar of the base layer material and the resin mortar for the surface layer material, the surface layer material can be easily poured onto the cured base layer via the formwork material. The surface layer can be adhered and formed on the base layer. In addition, when a thickener is added to the resin mortar of the base layer material and the viscosity is higher than that of the surface layer material, the base layer material can be formed into an accurate and good shape by preventing the base layer material from flowing out of the masking tape. it can. On the other hand, since the viscosity of the surface layer material can be set lower, it is possible to form a surface layer with a smooth surface along the formwork material by improving the surface layer moldability.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1-12 shows the construction process of the braille block as a surface layer block in order. With reference to these drawings, a construction method for forming a braille block on a metal plate having unevenness, that is, here, an iron lid 1 of a manhole will be described.
[0010]
First, as shown in FIG. 1, the surface area of the iron lid 1 on which the braille block is to be formed is marked, and the primer 2 is applied to the marking-formed forming frame using a brush or the like. As the primer 2, methyl methacrylate or the like can be used, and it is uniformly applied to the uneven surface of the iron lid 1.
[0011]
Next, with the primer 2 in a dry state, as shown in FIG. 2, the first masking tape 3 is attached along the rectangular frame on which the braille block on the surface of the iron lid 1 is to be formed. At this time, the first masking tape 3 is pressed with a finger along the concavo-convex surface of the iron lid 1, and the tape 3 is well adapted to adhere to the concave and convex surfaces. For the first masking tape 3, for example, a paper adhesive tape having a width of about 20 mm is used.
[0012]
Next, as shown in FIG. 3, the second masking tape 4 is attached so as to cover the first masking tape 3. For example, a cloth adhesive tape having a width of about 50 mm is used as the second masking tape 4, and the second masking tape 4 is simply attached to the convex surface on the first masking tape 3.
[0013]
Next, the base layer material 5 is poured into the frame surrounded by the first masking tape 3 and the second masking tape 4, that is, into the frame coated with the primer 2 on the iron lid 1. The base layer material 5 is composed of a resin mortar, and the viscosity thereof is adjusted by a thickener so that the fluidity is relatively low, that is, an appropriate thixotropy is imparted. Highly adjusted. The resin mortar of the base layer material 5 is manufactured by blending, for example, 25 parts of the binder, 2 parts of the coloring pigment, 72 parts of the filler, and 1 part of the thickener with respect to 100 parts of the main agent.
[0014]
As the binder, a partial polymer of acrylic ester or a partial polymer of methacrylic ester can be used. In addition, as a colored pigment, when a yellow braille block is used, yellow chrome lead, white titanium dioxide, or other inorganic pigments or organic pigments can be used. In the case of blue, ultramarine blue, and in the case of red, petal or other inorganic pigments or organic pigments can be used.
[0015]
Furthermore, as the filler, calcium carbonate powder, silica stone powder, and talc can be used. Furthermore, fine powders such as anhydrous silica and bentonite can be used as the thickener. In addition, you may add a hardening accelerator (tertiary amine) and a crosslinking agent (polyfunctional acrylic resin monomer) as an additive.
[0016]
In a state where the base layer material 5 is poured into the frame on the iron lid 1, the resin mortar is leveled with a spatula or the like as shown in FIG. Thereby, the base layer material 5 in the frame surrounded by the first and second masking tapes 3 and 4 is formed into a sheet shape, and the remaining resin mortar is scraped off.
[0017]
An uneven pattern is formed on the surface of the iron lid 1, but the uneven surface on the surface of the iron lid 1 is sealed by the first masking tape 3 and the second masking tape 4, and the base layer material 5 is increased. Since moderate thixotropy is imparted by the adhesive and the fluidity is lowered, the base layer material 5 does not flow out of the recess on the iron lid, and can be molded well.
[0018]
Therefore, after the base layer material 5 is semi-cured (gelled), if the first and second masking tapes 3 and 4 are peeled off and removed from the iron lid 1, as shown in FIG. A good rectangular base layer 6 having a straight edge with no gap is formed. The thickness of the base layer 6 is formed by stacking two first and second masking tapes 3 and 4 on top of each other.
[0019]
Next, on the base layer 6 on the iron lid 1 formed as described above, as shown in FIG. 7, a mold material 10 formed in advance in a predetermined shape is placed and affixed thereon. The mold material 10 is formed into a sheet shape from a foam (a closed-cell foam, such as a foamed polyethylene resin), and has a plurality of long openings (through long holes) 10a formed on the back surface. Has a pressure-sensitive adhesive layer, and a release paper is stuck to it for protection. For this reason, if the release paper on the back surface is peeled off, the mold material 10 can be easily attached onto the base layer 6.
[0020]
Next, as shown in FIG. 8, the surface layer material 7 is poured and filled into the openings 10 a of the mold material 10 attached on the base layer 6. The surface layer material 7 is made of resin mortar, and is manufactured by blending, for example, 28 parts of a binder, 2 parts of a color pigment, and 70 parts of a filler with respect to 100 parts of the main agent. By not adding a thickener, the surface layer material 7 is set to have a viscosity lower than that of the base layer material 5 to improve fluidity.
[0021]
As the binder, a partial polymer of acrylic ester or a partial polymer of methacrylic ester can be used. In addition, as a colored pigment, when a yellow braille block is used, yellow chrome lead, white titanium dioxide, or other inorganic pigments or organic pigments can be used. In the case of blue, ultramarine blue, and in the case of red, petal or other inorganic pigments or organic pigments can be used.
[0022]
Furthermore, calcium carbonate powder, quartzite powder, and talc are used as fillers. As additives, curing accelerators (tertiary amines) and cross-linking agents (polyfunctional acrylic resin monomers) may be added, and thickening of anhydrous silica, bentonite, etc. within a range where the viscosity is not so high. Materials can also be blended.
[0023]
Since such a surface layer material 7 uses the same bonding material as the base layer material 5, the surface layer material 7 is well bonded onto the base layer 6 and has a relatively low viscosity. The convex portions that are well filled up to the inner details and become the surface layer shape of the braille block after curing can be finished with a smooth surface.
[0024]
Next, the anti-slip material 11 is sprayed on the surface layer material 7 immediately before the surface layer material 7 is cured. As the non-slip material 11, silica sand colored in the same color as the surface layer material 7 can be used, and the silica sand adheres to the surface of the surface layer material 7. Then, after the surface layer material 7 is cured, as shown in FIG. 10, the mold material 10 is peeled off, as shown in FIG. 11, the excess anti-slip material 11 is swept away with scissors, and as shown in FIG. A surface layer block as a braille block in which the surface layer 8 is projected on the base layer 6 is completed.
[0025]
Thus, even if the place where the braille block is formed is on the uneven surface of the metal plate such as the iron lid 1, a double masking tape is applied around the place to increase the viscosity and thixotropy. Since the base layer material 5 to which the material is applied is poured into the portion and the base layer 6 is formed, it is possible to prevent the material from protruding beyond the masking tape through the recesses on the surface of the iron lid 1, and to form a base with a good shape. The layer 6 can be molded, and the surface layer 8 on the base layer 6 is molded by filling the inside of the mold material 10 with the surface layer material 7 having a low viscosity, so that the surface layer 8 is molded into a good shape with a smooth surface. be able to.
[0026]
【The invention's effect】
As described above, according to the surface layer block construction method of the present invention, the surface layer block composed of the base layer and the surface layer thereon is constructed on a metal plate such as an iron lid of a manhole with less man-hours. be able to. In addition, for the base layer material, by applying a double masking tape on the metal plate, even if there are irregularities on the metal plate, it is difficult for the material to flow out of the frame when filling the material, and a good edge that does not protrude A surface layer block having a base layer can be formed. Moreover, the viscosity of the base layer material can be increased by adding a thickener to prevent the material from flowing out of the frame, and a surface layer block of the base layer having a good edge without protrusion can be formed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a primer is applied to the surface of an iron lid according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a first masking tape 3 is affixed to a location where a braille block is to be formed.
FIG. 3 is a perspective view showing a state in which a second masking tape is applied.
FIG. 4 is a perspective view of a state in which a base layer material is poured into a portion surrounded by a masking tape.
FIG. 5 is a perspective view showing a state in which the filled base layer material is leveled with a spatula.
FIG. 6 is a perspective view of a state in which the masking tape is peeled off and a base layer is formed on the iron lid.
FIG. 7 is a perspective view of a state in which a formwork material is placed on the base layer.
FIG. 8 is a perspective view of a state in which a surface layer material is poured into the opening of the mold material.
FIG. 9 is a perspective view showing a state in which a non-slip material is sprayed on the surface material.
FIG. 10 is a perspective view of a state in which the formwork material is peeled off.
FIG. 11 is a perspective view of a state in which the anti-slip material is swept away.
FIG. 12 is a perspective view of a molded Braille block.
FIG. 13 is a partially enlarged cross-sectional view of a Braille block.
[Explanation of symbols]
1-iron cover 2-primer 3-first masking tape 4-second masking tape 5-base layer material 6-base layer 7-surface layer material 8-surface layer 10-form frame material 11-slip prevention material

Claims (3)

In the construction method of the surface layer block that forms the surface layer block on the surface of the metal plate having irregularities,
Applying a primer to the surface of the metal plate;
A step of attaching the first masking tape along the periphery of a predetermined range of the surface of the metal plate to be attached to the uneven surface of the metal plate;
Applying a second masking tape that is wider than the first masking tape over the first masking tape;
Filling the portion surrounded by the first and second masking tape with a base layer material of resin mortar and flattening the base layer material and curing;
A step of pasting a mold material on the cured base layer, filling the inside of the mold material with a surface layer material of resin mortar, and curing it;
A method for constructing a surface layer block comprising: 2. The surface layer block construction method according to claim 1, wherein the same kind of synthetic resin is used as a binder for the resin mortar of the base layer material and a binder for the resin mortar of the surface layer material. 2. The surface layer block construction method according to claim 1, wherein the base layer material has a viscosity higher than that of the surface layer material by adding a thickener to the resin mortar.

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