JPS6338490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a concrete block used particularly for wave dissipation in rivers, ports, etc.

``Prior Art and its Problems'' This type of concrete block is desired to have appropriate voids, but is also difficult to break and has high stability.

Conventional wave-dissipating blocks are, for example, disclosed in Japanese Patent Application Laid-Open No. 1973-
It is common to have a plurality of protruding legs, such as those described in Publication No. 71744, which not only often break, but also have poor stability.

SUMMARY OF THE INVENTION An object of the present invention is to provide concrete blocks that have a robust structure, are highly stable, and have good interlocking properties.

"Means for Solving the Problems" The concrete block of the present invention has an approximately equilateral triangular pyramid shape as a whole, and has slopes at each vertex of the block, the tip surfaces of which are flat and parallel to each surface of the equilateral triangular pyramid. A chamfered side is formed along each edge of the regular triangular pyramid, and a trapezoid is formed on one hypotenuse of the chamfered sides and one base opposite thereto. A large recess is formed, and a through hole is provided between the opposing large recesses.

"Function" According to this structure, the ball remains in the same state no matter which direction it rolls on the four sides of the equilateral triangular pyramid, and the center of gravity is low, resulting in high stability. In addition, it does not have protruding legs like the conventional one, and has an enlarged part at each apex of the equilateral triangular pyramid with a flat tip surface and a slope parallel to each surface of the equilateral triangular pyramid. Each edge of the shape is chamfered, making it difficult to break. Furthermore, no matter which direction the block is rolled, one of the two opposing large recesses will face diagonally upwards and the other will face diagonally downwards, so the large recesses and enlarged parts of the blocks can be fitted in either direction. Can be locked to each other. Moreover, since the through hole penetrates between the two large recesses, the wave-dissipating effect is also high.

"Example" Hereinafter, an example of the present invention will be described in detail based on the drawings.

As shown in Figs. 1 to 3, the concrete block A according to the present invention (hereinafter referred to as the main block) is an integrally molded product made of concrete, and since it has an approximately equilateral pyramidal shape as a whole, for convenience of explanation,
An equilateral triangular pyramid a as shown in FIG. 4 is imagined as the original shape, and its structure is clarified by referring to it.

This block A has four faces 1 that are lower than and parallel to the four triangular faces b of the equilateral triangular pyramid a, that is, three slopes and one base, and each of the four vertices formed by these four faces has an enormous size. 2 and has a chamfered side 3 chamfered along a cut surface d parallel to the ridge line c of the equilateral triangular pyramid a.

The distal end surface 4 of each enlarged portion 2 is a flat surface that is obtained by cutting each vertex of an equilateral triangular pyramid a along a cutting plane e perpendicular to the perpendicular line. In addition, each ampulla 2
is a slope 5 that coincides with the four triangular faces b of the regular triangular pyramid a and is slightly higher than the above-mentioned face 1, and is chamfered along the cut plane f that is parallel to the ridge line c of the regular triangular pyramid a and is slightly higher than the chamfered side 3. It has a high slope 6. Therefore, the enlarged portion 2 has an overall diamond shape that protrudes slightly from the surface 1 and the chamfered side 3, and its tip surface 4 is hexagonal.

In addition, this block A has a deep base large enough to fit the enlarged portion 2 of another block A into one oblique side of the chamfered sides 3 and one bottom side opposite to this oblique side. A large concave portion 7 is formed. In the illustrated example, this large concave portion 7 extends over the enlarged portions 2 at both ends of the oblique side and the base on which it is formed, that is, it has a trapezoidal shape in which the gap between the enlarged portions 2 at both ends is deeply scooped out. Therefore, the chamfered sides 3 are substantially absent on these sides, and both inclined inner surfaces 7a of the large recess 7 continue straight to the enlarged parts 2 at both ends. A large circular through hole 8 passing through the center of the bottom surface 7b is provided between the opposing large recesses 7. Note that this through hole 8 is not limited to a circular shape, but may be square, octagonal, or the like.

Since this block A has such a structure, no matter which of its four sides 1 it is rolled, it will be in the same state.
In other words, the slopes 5 of the three lower enlarged portions 2 touch the ground and stand still, and the center of gravity is also low, resulting in good stability. In addition, it has a Y-shape when viewed from any of the four surfaces 1, and has a thick and thick 3 with a head (ampulla 2) on each surface 1.
Since the two members are continuous, for example, when an external force is applied from above the block A,
Since the external force is dispersed among the three members, it is very advantageous from a mechanical point of view.

In addition, it has an almost regular triangular pyramid shape as a whole, and although it has an enlarged part 2, a large recess 7, and a large through hole 8, there are no small protrusions, long legs, small recesses, or small holes, and the edges are chamfered. Furthermore, since the distal end surface 4 of the enlarged portion 2 is flat and the slopes 5 and 6 are parallel to the surface 1 and the chamfered side 3 and only slightly protrude from them, molding is easy and there is little chance of damage.

Furthermore, even when a large number of blocks A are piled up in an orderly manner or randomly, the enlarged portion 2 fits into the large recess 7 of another block A, and in this fitted state, the slope 5 of the enlarged portion 2 becomes large. The blocks are in close contact with the inner surface 7a of the recess 7, and the enlarged portions 2 of each block engage with each other when the fitting is about to come off, so the locking relationship between the blocks is good, and as mentioned above, the blocks are stable as a single unit. Due to its good properties, it does not easily collapse in any stacked or arranged state.

For example, when waves act from the left in FIG. 2, a force that tries to overturn the block A is exerted, but a large amount of waves are guided by the diagonally upward large concave portion 7 and pass through the through hole 8. Also, when waves act from the right side, uplift force acts on the block A, but in this case too, a large amount of waves are guided to the diagonally downward large concave portion 7 and pass through the through hole 8. Not only is the wave force greatly reduced, but the waves passing through the through holes 8 disturb the entire waves, so when a large number of blocks A are stacked, the wave-dissipating effect is very high.

Further, when the block A is transported and installed, it can be suspended by passing a wire or the like through the through hole 8.

"Effects of the Invention" As detailed above, the concrete block of the present invention has the following effects.

It has a structure that is difficult to damage.

High stability.

The blocks are well connected to each other.

High wave-dissipating effect.

Easy to mold.

There are no restrictions on the direction of installation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a concrete block as an example of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view, and Fig. 4 is a reference perspective view of a regular triangular pyramid for explaining its structure. . A...Concrete block, 1...4 faces, 2...bulge, 3...chamfered side, 4...tip surface, 5, 6...slope, 7...large recess, 8...through hole.

Claims (1)

[Claims] 1 The entire shape is approximately an equilateral triangular pyramid, and at each vertex, an ampullae is formed with a flat tip surface and a slope parallel to each surface of the equilateral triangular pyramid, and at each edge of the equilateral triangular pyramid. A trapezoidal large recess is formed on one oblique side of the chamfered sides and one base opposite to the oblique side of the chamfered side, and a penetration is formed between these opposing large recesses. A concrete block characterized by having holes.