JPH0636081B2 - Method for manufacturing light reflection pillar and light reflection plate - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a cement-based light reflecting pillar and a light reflecting plate for roads and traffic.

[Prior Art] Conventionally, roads that are conveniently used for safe traffic at night,
There are various types of light-reflecting columns and light-reflecting plates for traffic (hereinafter abbreviated as light-reflecting columns etc.). Those that use glass beads are such that after mixing glass beads in mortar and hardening the mortar, hydrochloric acid, etc. Then, the surface of the cured body was eroded to expose the glass beads on the surface of the cured body.

However, with this method, it is easy to make a cured product, but it requires a complicated operation of eroding with hydrochloric acid after that, and since the glass beads are only sparsely exposed on the surface of the cured product, the light reflectance is low and the road surface is low. It was not enough as a pillar.

[Problems to be Solved by the Invention] Therefore, the present invention has been completed as a result of research on a method of manufacturing a standard pillar or the like which does not require much labor for manufacturing the standard pillar or the like and has high reflectance.

[Means for Solving the Problem] The present invention uses a plastic sheet to which glass beads are attached, a plastic outer sheet and a plastic sheet on the outermost tubular shape using a cylindrical outer mold and an inner mold, then cement mortar, and a center. It is the one in which cement concrete is poured and cured. The same method is used for the light reflecting plate.

The light reflecting pillar of the present invention will be described below with reference to the drawings.

FIG. 2 shows an example of the standard pillar of the present invention, in which the glass beads 2 are on the surface of the pillar of the standard pillar, the cement mortar 5 is behind the glass beads 2, and the cement concrete 6 is in the center of the pillar to form a light reflective pillar. To do.

In order to make this pillar, first, the glass beads 2 shown in FIG. 1 are attached to the plastic sheet 3 with the adhesive material 4 so that the glass beads are filled to a depth of about half.
make. In this case, glass beads having a diameter of 1 mm or less and transparent are preferable. The plastic sheet is preferably one that does not swell when absorbing moisture. Further, as the adhesive material, one having a smaller adhesive strength than the cement mortar holding the glass beads is preferable.

Next, wipe the inside of the cylindrical outer mold frame 7 with a spray glue to attach the glass bead sheet 1 to the outer mold frame 7 on the plastic sheet side.
After being attached so as to be in contact with the inner surface of the, the cylindrical inner formwork 8 is concentrically assembled at a predetermined position in the outer formwork 7, and white, yellow, or red is provided between the outer formwork 7 and the inner formwork 8. Pour cement mortar 5, which is colored appropriately such as orange. In this case, a conventional admixture such as SBR or acrylic resin may be added to the mortar for the purpose of densification, weathering prevention and stain prevention.
Next, the cement concrete 6 is poured into the inner mold 8 and the inner mold 8 is pulled out before the mortar hardens, so that both the mortar and the concrete are integrally hardened.

After the mortar is hardened, the outer frame 7 is removed, and the plastic sheet 3 of the glass bead sheet 1 is peeled off to obtain the light reflection column of FIG. 2 having a glass bead layer on the surface.

The curing after the casting may be performed by a known method.

Alternatively, after the mortar 5 is hardened, the inner formwork 8 may be extracted and the concrete 6 may be poured and hardened therein.

It is also possible to pour the mortar 5 entirely into the inner frame 8 and the internal space where the glass bead sheet 1 is attached without using the concrete 6.

The last plastic sheet 3 may be peeled off after the transportation and installation are completed at the construction site. In this case, the plastic sheet is convenient because it also serves as a protective material during transportation and installation.

If necessary, concrete may be reinforced or fibers may be mixed. Alternatively, mortar or concrete may be impregnated with a resin.

The above manufacturing method may be vertical or horizontal.

A light reflecting plate can be manufactured by using a flat plate-shaped mold without using a cylindrical mold and applying the same method as the above method.

FIG. 4 shows an example in which a pillar or the like thus produced is used for a road. There is a light reflection pillar 10 on the road shoulder, and a plate-shaped light reflector 11 on the center line of the road 12.

[Effects of the Invention] In the method for producing a light-reflecting pillar etc. of the present invention, glass beads are adhered to the surface at a high density even though it is relatively simple, and further, white or yellow, red or orange is provided on the back. Since it has a mortar layer that is colored in the same manner, it has a high light reflectance and can sufficiently exert its effect as a light reflector. Moreover, since the glass beads are embedded in the mortar layer to a depth almost half of that, there is no problem of peeling and the glass beads are highly durable.

Moreover, in terms of manufacturing, the shape, cutting, and coloring are free, and various sizes can be manufactured, and it is economically advantageous because the glass beads are only on the surface, are made of mortar, concrete, etc. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plastic sheet to which glass beads are attached, which is used for manufacturing the light-reflecting pillar of the present invention, and FIG. 2 is a cross-sectional view of one embodiment of the light-reflecting pillar manufactured by the present invention. FIG. 3 is a cross-sectional view showing an example of a method of manufacturing the light-reflecting column of FIG. FIG. 4 is a perspective view showing an example in which a light reflection pillar and a light reflection plate are used for a road. 1 ... Glass beads plastic sheet 2 ... Glass beads 3 ... Plastic sheet 4 ... Adhesive material, 5 ... Mortar 6 ... Concrete, 7 ... Outer mold 8 ... Inner mold, 9 ... Bottom Type 10 …… Light reflecting pillar, 11 …… Light reflecting plate 12 …… Road

Claims (2)

[Claims] 1. A plastic sheet prepared by spraying a spray glue on the inside of a cylindrical outer mold and adhering a large number of transparent glass beads having a diameter of 1 mm or less prepared in advance with an adhesive material. After sticking so as to contact the inner surface, the inner mold is concentrically assembled at a predetermined position in the outer mold, and white or appropriately colored cement mortar is poured between the outer mold and the inner mold, and then, Cement concrete is poured into the inner formwork, the inner formwork is pulled out before the mortar is hardened, the mortar and concrete are integrated, and then the plastic sheet is peeled off. Method 2. A spray sheet is sprayed on the inside of one of the molds, and a plastic sheet prepared by adhering a large number of transparent glass beads having a diameter of 1 mm or less with an adhesive material is contacted with the inner surface of the mold on the sheet side. After pasting on, place the other formwork at a predetermined interval so as to face the formwork,
An inner mold is further arranged at a predetermined interval between the two molds, and white or appropriately colored cement mortar is poured between the inner mold and the mold to which the plastic sheet is attached, and then the inner mold. Concrete is poured between the frame and the other form that is not pasted, the inner form is pulled out before the cement mortar hardens, the cement mortar and concrete are integrated, and then the plastic sheet is peeled off. A method for manufacturing a light reflection plate, characterized by taking.