JPH09316805A - Block, and block array - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a block in which construction of high evaluation, reduction of a construction period, and reduction of construction cost can be achieved, and provide a block array comprising arrangement of the blocks without harmful gaps, and of favorable appearance and easy maintenance and management. SOLUTION: A device is provided with a block main body 11 of a polygonal plane form, a cover member 12 to cover circumferential parts, and a bearing seat 13 for the cover member 12. At the upper circumferential parts of the block main body 11, the cover member 12 integrally formed with peripheral parts occupying half the whole circumference is protruded from the peripheral parts. The bearing seat 13 integrally formed with an upper surface of the block main body 11 is set along the other half of the peripheral parts. A block array is composed of blocks arranged and connected to each other to form a surface.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a block used in civil engineering, construction, and other fields. The invention also relates to a block array composed of such blocks.

[0002]

2. Description of the Related Art Road surfaces including sidewalks and roads are generally paved unless there are special circumstances. As such paving materials, various blocks such as bricks, concrete boards, and stone boards are widely used. These blocks also
It is also used when paving peripheral roads of buildings, peripheral circuits of parks, open spaces, and open spaces, and forming floors of buildings.

In the paving work using the blocks described above, the laying condition of the blocks should be stable, and if there is some poor ground leveling, this should be absorbed by the blocks, and harmful gaps should be left between the paved blocks. Many requirements are imposed on the construction work, such as the absence of pavement and finishing the pavement surface within the allowable error range.

The current pavement work is also carried out so as to satisfy the above matters. Therefore, the paved surface is finished as designed, and each block is grounded on the laid surface without being separated from the laid surface. In addition, there are no gaps between the blocks that may damage the appearance or generate weeds.

[0005]

The conventional pavement work depends largely on the skill of the worker. This kind of construction is no exception, and the reduction of skilled workers makes it difficult to achieve highly evaluated work. Even if a skilled worker can be secured, it is necessary to spend a lot of time and labor for joint work between blocks. Therefore, it is difficult to reduce the construction period and the construction cost.

[Object of the Invention] In view of these technical problems, the present invention is to provide a block capable of highly evaluated construction, shortening construction period, and reducing construction cost. The block provided by the present invention has versatility that can be applied to other than paving. The present invention also provides a block array with an array of such blocks, namely,
The object is to provide a block array that has no harmful gaps, has a good appearance, and is easy to maintain and manage.

[0007]

The laying block according to claim 1 of the present invention is characterized by the following means for solving the problems in order to achieve the intended purpose. That is, the planar polygonal block main body is provided with the covering piece and the seat for the covering piece in the upper peripheral portion of the block main body, and in the upper peripheral portion of the block main body,
A covering piece integrally formed on the peripheral part occupying one half of the entire circumference projects from the peripheral part, and a seat integrally formed on the upper surface of the block main body extends along the remaining one half peripheral part of the block main body. It is characterized by

A block according to a second aspect of the present invention is the block according to the first aspect, wherein the block main body is provided with a horizontally extending covering piece and a horizontally formed seat. The seats correspond to each other.

A block according to a third aspect of the present invention is the block according to the first aspect, wherein the block main body is provided with a cover piece that is inclined and overhangs and a seat that is formed to be inclined.・ The seats correspond to each other.

A block according to claim 4 of the present invention is the block according to any one of claims 1 to 3, wherein the block main body is a hollow rectangular body having a flat bottom surface, and the block main body is provided at an upper peripheral portion of the block main body. Out of the four peripheral portions, the covering pieces project from the two peripheral portions, and the seats are provided along the remaining two peripheral portions.

According to a fifth aspect of the present invention, in the block according to any one of the first to third aspects, the block body is a flat hexagonal hollow body having an open bottom surface, and the block body has an upper peripheral portion. Of the six peripheral parts in, the covering pieces project from every other peripheral part,
There are seats along the remaining three peripheral areas.

According to a sixth aspect of the present invention, in the block according to any one of the first to fifth aspects, the covering piece and the seat have a relative height difference corresponding to the thickness of the covering piece. Have

A block according to a seventh aspect of the present invention is the block according to any one of the first to sixth aspects, wherein the block main body has a plurality of water passage holes extending vertically.

According to an eighth aspect of the present invention, in the block according to any one of the first to seventh aspects, a connecting hole is formed on a peripheral side surface of the block body.

According to a ninth aspect of the present invention, in the block according to any one of the first to eighth aspects, the connecting projection is formed on the lower surface of the covering piece, and the connecting projection for receiving the connecting projection is formed. A hole is formed in the seat.

A block array according to a tenth aspect of the present invention is characterized by the following means for solving the problems in order to achieve the intended purpose. That is, the blocks according to any one of claims 1 to 9 are arranged in a plane and connected to each other.

A block array according to an eleventh aspect of the present invention is the block array according to the tenth aspect, wherein corner blocks each having a planar triangular shape are connected to the corners of the blocks via a connecting member.

[Operation] When a paving surface is formed by the block of the present invention, a large number of objects are installed or buried on the laying surface. Specifically, the blocks are arranged vertically and horizontally adjacent to each other on the laying surface. In the adjoining relationship in such a block arrangement state, the seat on one block body side receives the covering piece on the other block body side. This is because the receiving seat is covered with the covering piece, so that there is no gap between adjacent portions of the blocks, and therefore joint work can be omitted. In addition, even if the orientation of the other block relative to one block is changed to any direction such as front / back, left / right, or up / down in the adjacent blocks, as long as the covering piece and the seat are kept overlapping, There is no gap. This means that the orientation of the blocks can be finely adjusted, and it also means that the blocks can be connected to each other with a gentle connection angle such as front / rear, left / right, and up / down. Therefore, the block can comply with the rough laid surface.

When the block of the present invention is provided with connecting means such as connecting projections and connecting holes, the blocks can be connected to each other when laid.

The block array according to the present invention is constructed as described above using the blocks of the present invention.
In such a block array, there is no gap between the adjacent portions of the blocks, and since there is no gap, the paved surface has a good appearance.

In the block array according to the present invention, since the blocks are connected (because they are not bonded), the blocks may be detached for inspection or replaced at the time of partial pavement failure. Can be done easily. Therefore, maintenance / management of the block array is easy.

[0022]

DETAILED DESCRIPTION OF THE INVENTION One embodiment of a block according to the present invention is illustrated in FIGS. In the block of the illustrated example, the block main body 11 is a flat rectangular hollow body (box shape) having an open bottom surface, and two substantially horizontal covering pieces 12 and two substantially horizontal hollow bodies are provided on the upper peripheral portion of the block main body 11. There is a pedestal 13. The two covering pieces 12 are the block body 11
Is integrally formed with a peripheral portion (two side portions forming a right angle of a quadrangle) that occupies a half of the entire circumference, and projects from the peripheral portion. The two seats 13 are integrally formed on the upper surface of the block main body 11 and the remaining half of the block main body 11 (the other two sides forming a rectangular right angle).
Is along. The surface of both covering pieces 12 is the block body 11
The height is the same as the upper surface of
Is lower than the upper surface of the block body 11 by the thickness of. That is, there is a difference in height between them, in which both cover pieces 12 are high and both seats 13 are low. These covering pieces 12 and seats 13
Are paired with each other in the relative relationship that the seat receives the covering piece and the covering piece covers the seat.

On the lower surface of each covering piece 12, one or more (two in the illustrated example) connecting projections 14 are integrally attached. The connecting projection 14 is composed of a vertical split pin having a lower end that bulges in an arrow shape. The pin shape of the connecting projection 14 is elastically deformed (contracted / restored) within the range permitted by the vertical slit. Each receiving seat 13 is formed with one or more (two in the illustrated example) connecting holes 15 penetrating vertically through the receiving seat 13. The connecting hole 15 has a long hole shape, and a part of the hole diameter is slightly larger than the other part of the hole diameter. The hole diameter of the relatively small portion of the connecting hole 15 is smaller than the outer diameter of the arrow-shaped portion of the connecting protrusion 14. The connecting protrusion 14 and the connecting hole 15 form a pair and are used when connecting the blocks to each other. Therefore, the portions of the covering pieces 12 and the receiving seats 13 where the connecting projections 14 and the connecting holes 15 are provided are set to the positions shown in the figure for such connection.

The upper wall surface of the block body 11 is formed with a large number of water passage holes 16 for passing rainwater and the like. Each side wall surface (circumferential side surface) of the block body 11
One or more (for example, 2 to 3) connecting holes 17 are formed in each. A support protrusion 18 for holding a transparent member 21 described later is formed on the entire inner peripheral surface (front inner surface / rear inner surface / right inner surface / left inner surface) of the block body 11. The support protrusions 18 may be formed only on any two of the front inner surface, the rear inner surface, the right inner surface, and the left inner surface of the block body 11. The support protrusions 18 may be formed of one or a plurality of short ones on either the entire surface or the two surfaces. In addition, irregularities, grooves, stripes, etc. having an anti-slip effect may be formed on the upper surface of the block body 11. In addition, the entire upper surface of the block body 11 may be swollen or dented. As the block body 11, a hollow body whose bottom surface is not open or a non-hollow body (planar polygon having a solid interior) can be used. In the case of such a block body 11 as well, a water passage hole and a connecting hole penetrating vertically through the block body 11 are provided. However, from the viewpoint of weight saving and material saving, the block body 11 made of a hollow body is preferable to the solid body. In addition, the covering piece 12 may be projected so as to be inclined upward or downward. In such a case, the seat 13 also inclines upward or downward corresponding to the covering piece 12.

The transparent member 21 is made of a corrugated plate material as is apparent from FIG. A large number of water holes 22 are formed on the plate surface of the transparent member 21 in a scattered manner. In the case of the laying block shown in FIG. 2, the transparent member 21 is fitted inside the block body 11 and is supported by the support protrusions 18. The water passage holes 16 of the block body 11 and the water passage holes 22 of the permeable member 21 in the block body 11 do not overlap with each other when seen in a plane (that is, the positions are displaced).

The blocks illustrated in FIGS. 1 and 2 are made of metal.
Synthetic resin (including FRP) and glass (eg tempered glass)
-Ceramic / concrete or composite materials of these. The transparent member 21 is also made of the same material. Of course, the block body 11 and the transparent member 21
Either or both are made of a transparent material (a material that transmits light), a semi-transparent material (a material that transmits light) that has lower light transmittance than a transparent material, or an opaque material (a material that transmits light). It is an optional matter to make the material). As an example, the block body 1
1 is made of an opaque synthetic resin, and the transparent member 21 is made of a transparent or translucent material. As another example, both the block body 11 and the transparent member 21 are made of metal. In this case, the block body 11 may be colored with a paint, metal-plated, or coated with a colored synthetic resin. Such surface treatment on the transparent member 21 is an optional matter. As still another example, the block body 11 is made of metal and the transparent member 21 is made of synthetic resin. When the block is made of a material other than metal or synthetic resin, a connecting projection 14 made of metal or synthetic resin that elastically deforms (shrinks / restores) is attached to each covering piece 12.

As means for assembling the transmissive member 21 in the block body 11, in addition to the above-mentioned support protrusions 18, welding / adhesion (adhesive) / fastening (stop) / solidification (concrete adhesion) / connection hole A connecting rod or a connecting pipe to be inserted in 17 is adopted, and which means is adopted depends on these materials.

FIG. 3 exemplifies a stopper used for connecting blocks, that is, a connecting pin 31 mounted in the connecting hole 17. The connecting pin 31 is of the same kind as the connecting projection 12 but is an independent component.
And different. That is, the connecting pin 31 has a head 32 at one end,
The arrow-shaped portion 33 is provided at the other end, and the shaft portion 34 is provided between the head portion 32 and the arrow-shaped portion 33.
A slit 35 having a vertically split shape is formed over the entire length. The connecting pin 31 is made of, for example, metal or synthetic resin that elastically deforms (contracts / restores).

FIGS. 4 and 5 exemplify the arrangement and connection state of blocks according to the present invention. In the connected state of the blocks, the four block main bodies 11 are adjacent to each other in the front-rear direction and the left-right direction. Each coating piece 12 in these block bodies 11
The relationship between the seats 13 is as follows, as can be understood from FIG. The lower cover piece 12 of the upper right block body 11 of FIG. 3 covers the upper seat 13 of the lower right block body of FIG. Figure 3 Left side cover piece 12 of the upper right block body 11
Covers the right side seat 13 of the upper left block body 11 in FIG. The lower cover piece 12 of the upper left block body 11 in FIG. 3 covers the upper seat 13 of the lower left block body 11 in FIG.
The left covering piece 12 of the lower right block body 11 in FIG. 3 covers the right side seat 13 of the lower left block body 11 in FIG. In addition, in the place where each cover piece 12 and each seat 13 overlap,
As shown in FIG. 4, the connecting projection 14 on the side of the covering piece 12 has a seat 13
The blocks are fitted into the connecting holes 15 on the side to connect the adjacent blocks to each other. The plurality of blocks thus connected are in close contact with each other to form a wide flat surface (upper surface) without inclination or unevenness.

When a plurality of blocks are arranged as shown in FIGS. 4 and 5, the connecting holes 17 of the block main bodies 11 adjacent to each other are also aligned with each other. Therefore, in order to increase the connection strength of each block main body 11, the side wall surfaces of each block main body 11 may be connected to each other by utilizing the connection holes 17 that match each other. As an example thereof, the connecting pin 31 is inserted over both the connecting holes 17 that coincide with each other. As another example, bolts are inserted into both connection holes 17 and nuts are tightened therein. As still another example, long connecting rods or connecting pipes are inserted over the connecting holes 17 arranged in a line, and the ends of the connecting rods or connecting pipes are fixed with fasteners. The connecting means using the connecting hole 17 is arbitrarily adopted according to the application of the block, the design specifications, the situation of the site, and the like.

In the case of FIG. 4 and FIG. 5, when the blocks are to be strongly connected to each other so that the blocks do not move, for example, the shaft portion of the connecting projection 14 (the portion excluding the arrow-shaped end portion) is used. ) May be matched with the length of the connecting hole 15 (dimension in the axial direction). In such a case, the connecting projection 14 does not move in the connecting hole 15, so that the blocks in the connected state also do not move. Even in the connecting means using the connecting hole 17 and the connecting pin 31, it is sufficient to take measures according to this.

The blocks arranged and connected as shown in FIGS. 4 and 5 are also an embodiment of the block array of the present invention. In such a block array, each block is directly installed on the laying surface, or the lower part of each block is buried below the laying surface (under the ground). If the laid state of the blocks is stable only by burying the lower part of each block, the various connections described above are unnecessary. That is, when the stability of the block is obtained, the connecting projection 1
4 and the connecting hole 15 and / or the connecting hole 17 may be omitted from the block.

FIGS. 6A and 6B also show the arrangement and connection state of blocks according to the present invention. This block connection state is substantially the same as the example of FIGS. 4 and 5, but differs from the previous example in that a part of the block (block body 11) is vertically inclined or lifted. Some blocks can be made this way because of the connecting projection 1
The shaft portion of 4 is longer than the connecting hole 15 or the shaft portion of the connecting pin is longer than the connecting hole 17 (for two), that is, the block connecting force by these connecting means is flexible and loose. It depends on what it is. In the case of such loose block connection, not only the blocks up and down,
It can be finely adjusted in the front-back direction or the left-right direction. Therefore, even on a rough installation surface, the block can be installed according to this.

7A to 7D illustrate another embodiment of the block according to the present invention. Each of these blocks is as follows. In FIG. 7 (A), in the upper peripheral portion of the block main body 11 forming a rectangular plane,
The covering piece 12 is formed on one pair of opposite sides (two peripheral portions) of the quadrangle, and the seat 13 is formed on the other pair of opposite sides. In FIG. 7B, the cover piece 12 and the seat 13 are formed on each side (each peripheral portion) of the quadrangle in the upper peripheral portion of the block main body 11 having a quadrangular plane. Figure 7
In the case of (C), the covering piece 1 is provided on each of the six sides (each peripheral portion) in the upper peripheral portion of the block main body 11 having a planar hexagonal shape.
2 and the seat 13 are formed alternately. In FIG. 7D, the covering piece 12 and the seat 13 are formed on each side (each peripheral portion) of the triangle in the upper peripheral portion of the block main body 11 having a planar triangular shape.

Items omitted from the description in the blocks of FIGS. 7A to 7D are the same as the above-mentioned technical contents. The technical contents described above can also be applied to the blocks of FIGS. 7A to 7D within the scope of technical compatibility. Each block in FIG. 7 is also installed on the laying surface or buried under the laying surface in accordance with the above-mentioned content that a large number of blocks are arranged and / or connected. By doing so, the required block array is constructed.

The blocks and block arrays described above are used by being installed or buried in vacant lots, vacant lots, road median strips, gardens (gardens), parks, upslopes, passageways, balconies, terraces, etc.・ Lift of compost
It is also used for other purposes.

By the way, when the block or block array as shown in the drawing is installed on the ground, rainwater and the like can be infiltrated into the ground while beautifying the ground and preventing weeds from occurring. The prevention of weeds is based on the following reasons.

The factors that are involved in the prevention of weed generation include sunlight blockage, physical obstruction, and excess water. The block body 11 is made of an opaque body, and the transparent member 2
When 1 is made of a light transmissive material, the block body 11
Since the sunlight is spot-irradiated to the transparent member 21 in the block from each of the water passage holes 16, the weeds may germinate. The weeds germinated in this way extend to the spotlight part of the permeation member 21, but since there is no hole for extending to the ground in this part, that is, each water passage hole 1 of the block main body 11
6 and the water passage holes 22 of the permeable member 21 are out of position, the weeds die without growing. Moreover, it is convenient that the weeds from germination to death absorb the nutrient salts (phosphorus, nitrogen, etc.) that penetrate into the ground due to rainwater, so that the clarity of groundwater is increased. Also, in the long term, when the decomposed products of weeds due to bacteria are accumulated, the soil in that part can be used as compost. In addition, when the internal space of the block body 11 is filled with activated sludge, rainwater having a low BOD value is more effectively treated.

When the block or block array is used in hot springs, pools, and other upslopes, passageways, etc., the drainage of these parts becomes better. Also, in the case of a veranda, a terrace, etc., these can be produced by simply laying blocks or block arrays on the ground (unpaved) that has been leveled. In addition, if the block or block array is equipped with a solar cell, electrical equipment that uses this as a power source (eg, lighting equipment)
Can be operated. In the case of a block or block array with a reflector, it can serve as a danger indicator on the road, especially at night. Blocks and block arrays that are installed or buried as described above are easier to construct and remove than asphalt pavement and concrete mortar pavement.

FIGS. 8A and 8B show a corner block 41 having a flat triangular shape (an isosceles right triangle). The corner block 41 is connected to the corners of the blocks in a block array, which will be described later, including a large number of blocks (the ones shown in FIGS. 1 and 2). Therefore, the corner block 41 is provided with seats 42 on two sides (two peripheral portions) that sandwich a right angle, and each seat 42 is formed with two connecting holes 43. Therefore corner block 4
1 has a planar shape corresponding to the upper half when the block of FIG. 1 is bisected by its diagonal line. As such a corner block 41, there is also a planer shape corresponding to the lower half when the block of FIG. 1 is bisected by its diagonal line. The corner block 41 does not have to be plate-shaped. For example, the corner block 41 may be formed of a flat triangular hollow body or solid body (thick plate shape) as described for the block.

As a corner block for a block array constructed by using the block of FIG. 7A or 7B, a planar shape such as a block obtained by bisecting the block of FIG. There is also a planar shape such that the block of FIG. 7B is divided into two equal parts by its diagonal line. FIG.
As a corner block for a block array configured by using the block of (C), a planar shape such as a block obtained by bisecting the block of FIG. 7C by a vertical center line of the plane,
There is also a planar shape in which the block is bisected at the horizontal center line of the plane.

With respect to the various corner blocks described above, the same operations as those of the block having the block body 11 as a main component can be carried out within the range of technical compatibility. The material / material of each corner block is the same as that described for the block.

9A and 9B show the corner block 41.
The connecting member 51 for is illustrated. This connecting member 5
Reference numeral 1 is a plate-like member, and has a planar shape in which two covering pieces 12 are joined back to back. Connecting member 5
On the lower surface of 1, connecting projections 52 similar to the connecting projections 14 are integrally attached in a four-point arrangement. In this case, the two connecting protrusions 52 have a wide interval, and there are two connecting holes 15 in the peripheral portion of the block of FIG. 1 and two in each of the seats 42 of the corner block 41. This corresponds to the distance between the connecting holes 43.

FIG. 10 illustrates an embodiment of the block array according to the present invention. That is, in the block array of FIG. 10, a large number of blocks described in FIGS. 1 and 2 are arranged and connected in a manner as shown in FIGS. 4 to 6.
Further, in the block array of FIG. 10, the corner blocks 41 are connected to the corners of the blocks via a connecting member 51. The corner block 41 of a right-angled isosceles triangle applied to the corners of the blocks has two sides sandwiching the right angle and two sides forming a right angle on the block (two) side. Therefore, in the corner block 41, the connecting member 51 is mounted over these two matched portions. In FIG. 10, such a mounting position of the connecting member 51 is schematically indicated by diagonal lines.

Also when a block array is constructed using the blocks illustrated in FIGS. 7A to 7D, the blocks arranged in a plane are connected in the same manner as in the description of FIG. 10 or according to it. It will be.

[0046]

The block according to the present invention has a plurality of or a large number of blocks arranged vertically and horizontally adjacent to each other when used for pavement on a road surface or for other purposes. In such an adjacent arrangement, since the seat on one block main body side is covered with the covering piece on the other block main body side, no gap is created between adjacent portions of the blocks, and therefore joint work can be omitted. Further, when the overlapping of the covering piece and the seat is maintained and the direction of the block is finely adjusted in any direction such as front / back, left / right, and up / down, the above-mentioned gap does not occur. This means that the blocks can be connected to each other with a gentle connection angle such as front / rear, left / right, and up / down, so that the degree of freedom of block arrangement is increased and various arrangement modes can be accommodated. Further, since it is only necessary to overlap the covering piece and the seat in the block arrangement, no skill is required for this kind of work. Therefore, in various constructions to be carried out using this block, highly evaluated constructions, reduction of construction period, reduction of construction cost, etc. can be achieved without skill.

When the block according to the present invention is provided with a connecting means such as a connecting projection and a connecting hole, a plurality or a large number of blocks can be easily connected at the same time with these arrangements. Therefore, the work for fixing the arrangement state of the blocks can be efficiently performed.

The block array according to the present invention is constructed as described above using the blocks of the present invention. In such a block array, the individual blocks do not separate from each other and exhibit mechanical properties as an integrated structure. In addition, the block can be easily removed or installed for inspection or replacement, which facilitates maintenance and management. Moreover, since there is no gap between the adjacent portions of each block, a good block array including the appearance and the like can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a block according to the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is a front view of a connecting pin used for connecting blocks according to the present invention.

FIG. 4 is a plan view showing a connected state (block array) of blocks according to the present invention.

5 is a cross-sectional view of the block connected state shown in FIG.

6A and 6B are a sectional view and an enlarged sectional view schematically showing a laid state (block array) of blocks according to the present invention.

FIG. 7 is a plan view showing various other embodiments of the block according to the present invention.

FIG. 8 is a plan view and a sectional view of a corner block used in the block array according to the present invention.

9A and 9B are a plan view and a side view of a connecting member used in the block array according to the present invention.

FIG. 10 is a plan view schematically showing an embodiment of a block array according to the present invention.

[Explanation of symbols]

 11 Block Main Body 12 Cover Piece 13 Receiving Seat 14 Coupling Protrusion 15 Coupling Hole 16 Water Passage Hole 17 Coupling Hole 18 Supporting Protrusion 31 Coupling Pin 32 Head 33 Arrow Section 34 Shaft 35 Slit 41 Corner Block 42 Receiving 43 Coupling Hole 51 connection member 52 connection projection

Claims (11)

[Claims] 1. A planar polygonal block body is provided with a covering piece and a seat for the covering piece on an upper peripheral portion of the block main body, and a peripheral portion occupying a half of the entire circumference in the upper peripheral portion of the block main body. A block characterized in that a covering piece integrally formed with the portion protrudes from the peripheral portion thereof, and a seat integrally formed with the upper surface of the block main body extends along the remaining one-half peripheral portion of the block main body. 2. The block according to claim 1, wherein the block main body is provided with a horizontally extending projecting piece and a horizontally formed seat, and these covering piece and the seat correspond to each other. 3. The block according to claim 1, wherein the block main body is provided with an inclined projecting covering piece and an inclined seat, and these covering pieces and seats correspond to each other. 4. The block main body is formed of a flat rectangular hollow body having an open bottom surface, and of the four peripheral portions in the upper peripheral portion of the block main body, the covering pieces project from the two peripheral portions and remain. The block according to any one of claims 1 to 3, wherein there is a seat along two peripheral portions. 5. The block body is formed of a flat hexagonal hollow body having an open bottom surface, and a covering piece projects from every other peripheral portion among the six peripheral portions in the upper peripheral portion of the block body. The block according to any one of claims 1 to 3, wherein there is a seat along the remaining three peripheral portions. 6. The block according to claim 1, wherein the covering piece and the seat have a relative height difference corresponding to the thickness of the covering piece. 7. The block according to claim 1, wherein the block body has a plurality of water passage holes penetrating in the vertical direction. 8. The block according to claim 1, wherein the connecting hole is formed on a peripheral side surface of the block body. 9. The block according to claim 1, wherein the connecting projection is formed on the lower surface of the covering piece, and the connecting hole for receiving the connecting projection is formed in the receiving seat. 10. A block array in which the blocks according to claim 1 are arranged in a plane and connected to each other. 11. The block array according to claim 10, wherein the planar triangular corner blocks are connected to the corners of the blocks via a connecting member.