JPH0796766B2 - Interlocking block - Google Patents

Description

The present invention relates to an interlocking block, and more particularly to an interlocking block in which beads are arranged on a surface layer portion.

In recent years, interlocking blocks have been
It is widely used in various plazas, sidewalks, roads, etc., but asphalt is often used for paving the roads on which vehicles run.

Then, by painting on the asphalt road surface, you can draw traffic signs, letters, lane marks, etc.
The safety of the vehicle will be ensured by improving the visibility to the driver, and the smooth operation of road traffic will be achieved.
Further, in recent years, beads made of glass or the like have been mixed in paint and applied on the road surface, or by applying paint or the like and then spraying the beads, the beads are embedded in the paint such as a mark drawn on the road surface. By exposing a part of the beads and retroreflecting the light from the headlights at night, a safe night driving is ensured.

On the other hand, when the headlight light of an automobile etc. illuminates a traffic sign etc. drawn on the road surface, the headlight light enters the beads in the paint drawing the traffic sign etc. and is the same as the incident angle on the inner surface of the bead. It goes out of the beads at an angle and goes toward the light source.

However, although asphalt is refined from petroleum, the asphalt production cost has increased due to the soaring price of petroleum, and a road surface coating material that can substitute for asphalt has been demanded.

The interlocking block responds to such demands, but there is no technology to apply paint mixed with beads after forming the road surface with the interlocking block, so the interlocking block is used. There was a problem that when pavement was made, it was not possible to secure sufficient safety for the vehicle to run at night.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to reflect a headlight light such as a traffic sign or a lane mark to a driver of a vehicle that is traveling even at night. The purpose is to provide an interlocking block that can be recognized clearly from the road surface and ensure safe traffic operation.

In the present invention for achieving such an object, the surface layer concrete is partially or entirely disposed on the upper surface of the base layer concrete, and the water / cement ratio of the surface layer concrete is 30 to 35%. In the interlocking block described above, the concrete for the surface layer part is replaced with beads having a particle size of 0.08 to 10.0 mm in which part or all of the aggregate is retroreflective and has a surface coated with a light-transmitting synthetic resin. A part of the beads mixed in the surface layer concrete is exposed from the display side surface of the surface layer concrete.

(Operation) With this configuration, when the interlocking block according to the present invention is used, incident light can be reflected to the incident side, and the surface is worn and exposed by the wheel or the like. Even if the beads are destroyed or disappear, the beads mixed with the block surface layer sequentially appear on the surface of the display side, and it is not necessary to replace them for a long time, and it can be used without the trouble of maintenance or repair. When a headlight of a vehicle illuminates a bead, a traffic sign or the like composed of a large number of beads is clearly displayed on the road surface.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

The interlocking block B according to the present embodiment is the first
As shown in the figure, consisting of a known cement, the planar shape is a rectangular parallelepiped basic shape, both side surfaces in the longitudinal direction 1,
A convex portion and a concave portion are formed on 2 and both side surfaces 3 and 4 in the width direction. That is, three convex portions 1a, 2a and two concave portions 1b, 2b are formed on the side faces 1, 2 in the length direction, and the side faces 3, 4 in the width direction are formed.
Is formed with two convex portions 3a, 4a, and these convex portions and concave portions are formed in the same shape, and further formed on both side surfaces 3, 4 in the width direction and both side surfaces 1, 2 in the length direction. The irregularities form a substantially corrugated shape that is parallel to each other. Therefore, when two interlocking blocks are adjacent to each other in parallel, both side surfaces 1, 2,
3, 4 are arranged so as to fit each other.

Then, the interlocking block B according to the present embodiment.
The glass beads G are arranged on the upper surface portion 5 over the entire surface thereof so as to be partially buried in the surface layer portion of the interlocking block B.

Further, as shown in FIG. 2, glass beads G may be provided on half or a part of the upper surface portion 5 of the interlocking block B, and in this way, the glass beads G in various shapes. By combining the interlocking block B in which is provided, various traffic signs, lane marks, and speed limit display can be performed as shown in FIG.

Further, FIG. 4 is a sectional view of the interlocking block B according to this embodiment.

As shown in FIG. 4, the interlocking block B according to the present embodiment is composed of a surface layer portion 6 and a base layer portion 7, and the glass beads G are arranged in the surface layer portion 6 so as to be partially buried. The glass beads G according to this example are formed with various particle diameters of 0.08 mm or more and 10 mm or less. That is, if the particle shape of the beads G is 0.08 mm or less, retroreflection of light is small, and even when the headlight light is applied to the road sign or the lane mark, the road sign or the like is effectively displayed on the road surface. I can't. Also, if beads with a particle size of 10 mm or more are mixed, it is often destroyed due to friction between the tire and the theoretical surface when the vehicle is running, vibration, or impact, which is dangerous for vehicle traffic. is there. When the interlocking block B according to the present embodiment is used, the headlight light of the traveling vehicle enters the glass beads G as incident light 8 and is refracted and reflected in the incident direction on the inner surface of the glass beads G. However, since the light exits from the beads at the same angle as the incident angle and travels toward the light source as the reflected light 9, the traffic sign drawn on the road surface vividly appears to the eyes of the driver.

In the present embodiment, the case where the interlocking block is formed by a known cement having a normal composition has been described as an example, but it is made of glass so as not to be attacked by the alkaline component contained in the cement. The surface of the beads is coated with a synthetic resin having a transparency that does not prevent the refraction of light. Furthermore, the shape of the block itself is not limited to this embodiment.

When manufacturing the interlocking block as described above, the mixing ratio of the concrete used is as follows: S / A ratio 50-70% for base layer 7 concrete, cement 300-600 Kg / m ³ , W / C ratio. 30-35%. Next, the concrete composition for the surface layer portion 6 needs to be smooth on the surface of the block that is the road surface. Therefore, use a composition that does not use coarse aggregate, or use glass beads for part or all of the aggregate. Substitute. Considering the surface smoothness and required strength, the W / C ratio should be the same as the concrete for the base layer. In this way, the interlocking block has a low water-cement ratio of 30 to 35% for both the concrete for the base layer portion 7 and the concrete for the surface layer portion 6, so it is a high-strength block suitable for laying roads, etc. Will be rough.

Next, the base concrete and the surface concrete are respectively charged into the base concrete supply hopper 11 and the surface concrete supply hopper 10 of the block machine BM as shown in FIG. 5, for example. In this case, the surface concrete is mixed with a predetermined amount of glass beads in advance and kneaded with a mixer or the like. The working steps of the block machine BM are the primary filling step of filling the base layer concrete into the mold, the vibration step of vibrating the mold with a vibrator to sink the base layer concrete to the bottom of the mold, and the second step of filling the surface layer concrete into the mold. It consists of the next filling step and the vibrating and pressing step of tightening the concrete filled in the mold.

That is, first, in the first filling step, the base layer concrete is loaded into the base layer concrete filling box 13 with the damper 12 of the base layer concrete supply hopper 11 opened.
The base-layer concrete filling box 13 slides on the floor iron plate 14 and moves onto the mold 15, and since the base-layer concrete filling box 13 has no bottom plate, the concrete in the base-layer concrete filling box 13 drops into the mold 15. At this point, the base layer concrete filling box 13 is inched several times to allow the concrete to sufficiently enter the mold 15 to the upper edge, and then the base layer concrete filling box 13 is retracted out of the mold 15.

Next, enter the vibrating step, and under the mold 15, or
It is attached to the vibration table 16 provided via a pallet (or the vibration table 16 and the mold).
By operating a vibrator 17 (which is attached to the side of 15) for several seconds, the base layer concrete poured into the mold 15 sinks downward in the mold 15.

Then, a mixture of the surface concrete with a predetermined amount of glass beads is put into the mold 15 through the damper 18 of the surface concrete supply hopper 10 in the second filling step through the same steps as the base concrete. To be done. In this way, the base concrete poured into the mold 15 and the surface concrete located above the base concrete are tightened in the vibration pressurizing step. That is, the shoe 20 at the tip of the ram 19 attached to the head vibrator 18 arranged above the mold 15 descends, enters the mold 15, and presses concrete from above.

Then, the head vibrator 18 and the vibrator 17 of the vibration table vibrate and pressurize concrete in the mold 15 to mold it into a predetermined shape. In this vibration pressurizing step, the glass beads have a smaller specific gravity than other aggregates, and thus float on the upper surface of the concrete, and the interlocking block B having the glass beads on the surface layer portion and the surface is molded.

As a method of embedding beads integrally on the surface of the surface layer concrete, the surface layer concrete in which beads are mixed beforehand is used as the second method.
It is filled in the mold 15 in the next filling step and floated on the surface due to the difference in specific gravity in the vibration pressure step as described above, or glass beads are sprinkled on the surface of the surface layer concrete after the second filling step to brake. There is a method of press-fitting into the concrete surface in the pressurizing step. Particularly in the latter case, beads can be easily arranged on a part of the surface of the interlocking block as shown in FIG. 2, and therefore, by combining the blocks as shown in FIG. 3, for example, Certain road signs can be displayed with beads.

Then, after the vibration pressurizing step is completed, the vibration table 16 moves horizontally as shown in FIG.
Together with 15, the block is lowered to the demolding position, and the block is demolded on the pallet 22 provided on the lifting table 21. At this time, the blocks may be transferred step by step without using the lifting table 21. Finally, the ram 19 rises and returns to its original position, and the block B is carried by the conveyor (not shown) to the primary curing warehouse (not shown).

In the above example, the glass beads were mixed into the concrete from the beginning of the block molding and integrally molded with the block. However, the surface of the surface concrete after the secondary filling step has been described. It is also possible to spray, weld or press fit the synthetic resin coating material in the shape of marks such as traffic signs and lane marks.

Further, in this case, an alkali-resistant metal film with large light refraction or a synthetic resin film is formed on the lower half surface of the glass beads, and the parts where these metal films are formed are aligned and embedded in the interlocking block. It may be crowded.

Further, in the above-mentioned embodiment, the case where the beads are made of glass has been described as an example, but the present invention is not limited to the above-mentioned embodiment, and any material capable of retroreflecting light such as plastic may be used.

Further, in the above embodiment, the case where the interlocking block is used as the paving material for the road surface has been described as an example, but it is also possible to create a wall, a fence, etc. using the interlocking block according to the present invention. . When a wall or the like is created using the interlocking block according to the present invention, a traffic sign or other patterns can be displayed on the wall or the like by street lights or headlight light at night.

Furthermore, when a sidewalk is formed using the interlocking block according to the present invention, at night, street lights illuminate the beads, whereby the walkway surface is colorfully floated,
It enables safe and pleasant walking.

Since the interlocking block according to the present invention has the above-mentioned constitution, the surface layer concrete is kneaded with beads having an appropriate particle size, the surface of which is coated with a light-transmitting synthetic resin. It can improve the reflection efficiency of the beads exposed on the surface and increase the adhesion strength of the beads to the concrete, making it difficult for the surface layer including beads to be peeled off or the beads to scatter, and for a long time without replacement. The retroreflective effect can be retained and a clear display can be maintained.

By coating the bead surface with a light-transmitting synthetic resin, it is possible to protect the bead surface and improve the adhesion to concrete, prevent the bead surface from cracking, and contribute to improving the bead strength. At the same time, the alkali resistance is improved, the defects of the conventional products are improved, and the highly alkaline Portland cement can be used, and the block can be easily manufactured and is inexpensive.

The concrete for the surface layer is made of a concrete with a low water / cement ratio of 30 to 35%, so it has high strength and good wear resistance, and also forms a surface with diffused reflection with increased surface roughness. The display made up of a large number of beads mixed in can be relatively clarified to improve the distinguishability.

And, since some beads of the mixed beads are made to expose a part of the bead surface from the block upper surface, it is possible to display arbitrary characters and figures on the display surface,
It can be used for many purposes such as markings on pavement surfaces, sidewalk markings, and wall patterns.

[Brief description of drawings]

1 is a perspective view showing an embodiment of an interlocking block according to the present invention, FIG. 2 is a plan view showing another embodiment of an interlocking block according to the present invention, and FIG. 3 is an interlocking block according to the present invention. FIG. 4 is an explanatory view showing a state in which a road surface is formed using a locking block, FIG. 4 is a sectional view of the interlocking block according to the present invention, and FIG. 5 is an explanatory view showing a method for manufacturing the interlocking block according to the present invention. is there. B …… Interlocking block G …… Beads (glass beads) 15 …… Mold 17,18 …… Vibrator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-55-132801 (JP, A) Actually opened 54-80630 (JP, U) Actually opened 55-145512 (JP, U) Actual-open Sho 38- 13743 (JP, Y1) JP-B 54-29810 (JP, B2) JP-B 51-10033 (JP, Y2)

Claims (1)

[Claims] 1. The surface layer concrete is partially or entirely provided on the upper surface of the base layer concrete, and the water / cement ratio of the surface layer concrete is 30 to 30.
In the interlocking block to 35%, the surface layer concrete, a part or all of the aggregate, a particle having a particle size of 0.08 to 10.0 mm having a retroreflective surface coated with a light-transmitting synthetic resin is formed by beads. Alternatively, with respect to a part of the beads mixed in the concrete for the surface layer part, a part of the bead surface is exposed from the display side surface of the concrete for the surface layer part.