JPH03192202A - Production of light reflecting signpost and light reflecting plate - Google Patents

Abstract

PURPOSE:To produce the signpost having a high reflectivity by using a plastic sheet stuck with glass beads, and a cylindrical outside molding flask and inside molding flask, disposing the plastic sheet on the outermost side of the cylindrical molds, pouring cement mortar between the flasks, pouring cement concrete at the center and then hardening the mortar and concrete. CONSTITUTION:The cement mortar 5 exists behind the glass beads 2 sized <=1mm and the cement concrete 6 exists in the central part of the column to form the light reflecting signpost. Spray glue is sprayed to the inner side of the cylindrical outside molding flask 7 and the glass bead sheet 1 is stuck in such a manner that the plastic sheet side comes into contact with the inside surface of the outside molding flask 7; thereafter, the cylindrical inside molding flask 8 is assembled concentrically in the prescribed position in the outside molding flask 7. The cement mortar 5 adequately colored to a white, yellow, blue, orange, etc., is poured between the outside molding flask 7 and the inside molding flask 8. The cement concrete 6 is then poured into the inside molding flask 8 and the inside molding flask 8 is pulled out before the mortar hardens, by which both of the mortar and the concrete is integrated and cured. The light reflectivity is enhanced in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing cement-based light reflecting markers and light reflecting plates for roads and traffic.

[Conventional technology] Conventionally, roads have been conveniently used for safe traffic at night;
There are various types of light reflective markers and light reflecting plates (hereinafter referred to as light reflective markers) for traffic. Those that use glass beads are mixed with mortar and treated with hydrochloric acid etc. after the mortar hardens. The surface of the cured product was eroded and the glass beads were exposed on the surface of the cured product.

However, although this method is easy until the hardened material is created, it requires a complicated operation of being eroded with hydrochloric acid.
Moreover, since the glass beads are only sparsely exposed on the surface of the cured product, their light reflectance is low and they are not suitable for use as road markings, etc.

[Problems to be Solved by the Invention] Therefore, as a result of research into a method for manufacturing markers, etc. that does not require much effort and has a high reflectance, the present invention was completed.

[Means for Solving the Problems] The present invention uses a plastic sheet to which glass beads are attached, a cylindrical outer formwork and an inner formwork, the plastic sheet is placed on the outermost side of the cylinder, then cement mortar is placed in the center, and Cement concrete is poured and allowed to harden. A similar method is also used for the light reflecting plate.

The light reflecting marker of the present invention will be explained below with reference to the drawings.

Figure 2 shows an example of a marker according to the present invention, with glass beads 2 on the surface of the column, cement mortar 5 behind the glass beads 2, and cement concrete 6 in the center of the column to form a light-reflecting marker. do.

To make this marker, first attach the glass beads 2 shown in Figure 1 to a plastic sheet 3 using an adhesive 4 to the extent that the glass beads are buried approximately half the depth of the glass bead sheet 1.
make. In this case, the glass beads preferably have a diameter of 1 mm or less and are transparent.

Furthermore, the plastic sheet should preferably be one that does not swell upon moisture absorption. Furthermore, it is preferable that the adhesive material has an adhesion strength lower than that of the cement mortar that holds the glass beads.

Next, spray glue is sprayed on the inside of the cylindrical outer form 7, the glass bead sheet 1 is assembled into a plastic sheet, and a suitable color such as white, yellow, red, orange, etc. is applied between the outer form 7 and the inner form 8. Pour colored cement mortar 5. in this case,
S is added to the mortar to make it denser, prevent weathering, or prevent staining.
A conventional admixture such as BR or acrylic resin may be added.

Next, cement concrete 6 is poured into the inner formwork 8, and the inner formwork 8 is pulled out before the mortar hardens, allowing both the mortar and concrete to harden together.

After the mortar has hardened, the outer form 7 is removed and the plastic sheet 3 of the glass bead sheet 1 is peeled off to form the light reflecting signpost shown in FIG. 2 having a glass bead layer on its surface.

A known method may be used for curing after pouring.

Further, after the mortar 5 has hardened, the inner formwork 8 may be extracted and concrete 6 may be poured inside and hardened.

Further, the mortar 5 may be poured entirely into the inner formwork 8 and the internal space to which the glass bead sheet 1 is attached without using the concrete 6.

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

If necessary, reinforcement may be placed in the concrete or fibers may be added. 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 formwork instead of a cylindrical formwork and applying the same method as described above.

FIG. 4 shows an example of using a marker pole made in this way on a road. There is a light reflective marker lO on the road shoulder, and a plate-shaped light reflector 11 is located on the center line of the road 12.

[Effects of the Invention] Although the manufacturing method of the light-reflecting sign posts of the present invention is relatively simple, the glass beads are uniformly adhered to the surface at a high density, and the back side is coated with white, yellow, red, or orange. Since it has a colored mortar layer, it has a high light reflectance and can fully demonstrate its effectiveness as a light reflector. Moreover, since the glass beads are embedded in the mortar layer to approximately half the depth, there is no problem of them peeling off, and they are highly durable.

In addition, it has many advantages in terms of manufacturing, such as being free to shape, cut, and color, and being able to manufacture products of various sizes.It is also economically advantageous because the glass beads are only on the surface, and it is made of mortar or concrete. .

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a plastic sheet to which glass beads are attached, which is used in the production of a light-reflecting marker according to the present invention. FIG. FIG. 3 is a cross-sectional view showing an example of a method for manufacturing the light-reflecting marker pole of FIG. 2. FIG. 4 is a perspective view showing an example of using a light reflecting marker and a light reflecting plate on a road. ■...Glass beads Plastic sheet...Glass beads 3...Plastic sheet 4...Adhesive material 5...Mortar 6...Concrete 7...Outer formwork 8...Inner formwork 9・
...Lower mold 10...Light reflecting signpost 11...Light reflecting plate 12...Road

Claims (2)

[Claims] (1) Spray glue on the inside of a cylindrical outer form, and attach a plastic sheet with a large number of pre-made transparent glass beads with a diameter of 1 mm or less attached using adhesive, with the sheet side facing the inner surface of the outer form. After affixing the inner form so that they are in contact with each other, the inner form is assembled concentrically at a predetermined position within the outer form, white or appropriately colored cement mortar is poured between the outer form and the inner form, and then the inner form is A method for manufacturing a light-reflecting signpost, which comprises pouring cement concrete into a formwork, pulling out the inner formwork before the mortar hardens, and peeling off the plastic sheet after integrating the mortar and concrete. (2) Spray glue on the inside of one formwork and attach a plastic sheet with a large number of pre-fabricated transparent glass beads of 1 mm or less in diameter attached using adhesive so that the sheet side is in contact with the inner surface of the formwork. After that, place the other formwork at a predetermined interval so as to face the formwork, and
Inner formwork is further arranged at a predetermined interval between the two formworks, white or appropriately colored cement mortar is poured between the inner formwork and the formwork to which the plastic sheet is pasted, and then the inner formwork and Pour concrete between it and the other formwork to which nothing is pasted, pull out the inner formwork before the cement mortar hardens, and peel off the plastic sheet after integrating the cement mortar and concrete. A method for manufacturing a light reflecting plate characterized by: