JPH083906A - Joint width-keeping member, and block for pavement - Google Patents

Abstract

PURPOSE:To lay a block for pavement, keeing a joint width easily, and to allow a joint filler to easily permeate into kept joint widths. CONSTITUTION:A block 11 for pavement is composed of a block body 12 and joint width-keeping members 13 in isosceles triangle shape, which are stuck around the body 12. The block body 12 is composed of six sides, which are sides 121 to 124 being brought into contact with other block bodies, a bottom surface 125 being opposed to the side of a subgrade and a walking surface 126, and has a length L of 235mm, a width W of 118mm and a height H of 60mm. The joint width-keeping member 13 is made of high density polypropylen foam having a density of approximately 0.32g/cm<3> and has a thickness of 2mm, on one side of which member a pressure sensitive adhesive sheet for sticking the member 13 to the block body 12 is stuck. These members 1 3 are stuck above by 5mm from the side of the bottom surface 125 of the block body 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint keeping member and a paving block used as a paving material for, for example, sidewalks, roads, plazas, floors of buildings, and more specifically, concrete blocks, flat plates, bricks, The present invention relates to a joint keep member and a paving block that secure a joint width of various paving blocks such as curbs and natural stones.

[0002]

2. Description of the Related Art Today, the improvement of living environment in various situations has been widely noticed. For example, when paving a sidewalk or plaza, stop the conventional paving with asphalt material,
Various paving blocks such as concrete blocks, flat plates, bricks, curbs and natural stones are widely used as paving materials. Each of these paving blocks has a feeling of weight, and by devising the shape and color of each block, the paving surface can have various patterns, which contributes to improvement of the living environment.

When such a paving block is laid on, for example, a sidewalk, a line is drawn on the sidewalk using, for example, a vertical line,
It is necessary to spread the joints with a joint width of about 1 mm to 10 mm. In this way, in the work of laying the paving blocks while securing the joint width by thread tension at regular intervals, it requires masonry manpower and skill.
There was a problem that it was very troublesome.

In order to solve such a problem and enable paving blocks to be spread while easily securing a joint width, a joint width setting member in which a joint width setting member is fixed to a block member with an adhesive is provided. A paving stone has been proposed (Japanese Patent Laid-Open No. 5-79004). In this pavement with joint width setting, the joint width can be secured by laying the joint width setting member while abutting the side surface of the other block member where the joint width setting member is not fixed. The pavement with the joint width setting is spread on the sand cushion while securing the joint width with the joint width setting member, and then the upper surface is fixed by rolling. After that, a joint material such as sand is infiltrated into the joint and paving is performed.

[0005]

However, since the joint width setting member of the above-mentioned conventional pavement with joint width setting has a substantially semi-cylindrical shape and has a large area at the upper portion, the joint material within the secured joint is large. There was a problem that it was difficult to penetrate.
Further, since the joint width setting member according to the conventional technique is attached to only two surfaces of the block member, the side surface to which the joint width setting member is not attached is not sufficiently protected.

Therefore, the present invention has been made in order to solve the above problems, and it is possible to stably secure the joint width and to easily permeate the joint material into the secured joint. A first object of the present invention is to provide a keep member. Further, the present invention is a pavement that can be laid while easily securing a joint width, and that allows a joint material to easily penetrate into the secured joint. The second purpose is to provide a block for use. A third object of the present invention is to provide a paving block capable of protecting all the surfaces that come into contact with other paving blocks.

[0007]

According to a first aspect of the present invention, in a joint keeping member which is attached to a paving block to secure a joint width with another paving block, the joint keeping member is It has a top part and a bottom part, and the width near the bottom part is the same width as the bottom part or narrows toward the top part, and the part on the top side from the vicinity of the bottom part narrows sharply toward the top part. It is a flat plate having a curved shape and is made of any one of polyethylene, polypropylene, an ethylene-based copolymer, polyvinyl chloride, polystyrene, or a mixed resin thereof. According to a second aspect of the invention, in the joint keeping member according to the first aspect, the joint keeping member is formed of a foam having a density of 0.18 to 0.6 g / cm ³ . According to a third aspect of the invention, in the joint keeping member according to the first aspect, the joint keeping member is made of polypropylene foam having a density of 0.20 to 0.45 g / cm ³ . According to the invention of claim 4, in the joint keeping member according to any one of claims 1 to 3, the joint keeping member is formed in a triangular shape. In the invention according to claim 5, any one of claims 1 to 4
In the joint-keeping member described in the paragraph (3), the joint-keeping member is formed in a left-right symmetrical shape. According to a sixth aspect of the present invention, the block main body includes at least five surfaces, and a joint keeping member attached to at least two adjacent surfaces of the surface of the block main body that contacts the other block main body. The joint keeping member has a top portion and a bottom portion, and the width in the vicinity of the bottom portion is the same width as the bottom portion or becomes narrower toward the top portion. It is composed of a flat plate having a shape that narrows sharply toward the top. The invention according to claim 7 is attached to at least two adjacent surfaces of a block main body composed of at least five surfaces and a surface of the block main body that abuts on another block main body. 5. The paving block is provided with the joint keeping member according to any one of 5 above. According to an eighth aspect of the invention, in the paving block according to the sixth or seventh aspect, the joint keeping member is attached to all the surfaces of the block body that come into contact with other block bodies. In the invention according to claim 9, in the paving block according to any one of claims 6 to 8, the block main body is a concrete block, a flat plate, a brick, a curb,
Or composed of natural stone.

[0008]

In the paving block of the present invention, at least two adjacent surfaces of the block main body composed of at least five surfaces that come into contact with other block main bodies have a top portion and a bottom portion, and The width in the vicinity of the bottom portion is the same width as the bottom portion or narrows toward the top, and the joint keeping member made of a flat plate in which the portion closer to the top than the bottom is sharply narrowed toward the top. Install. Since this joint keeping member is made of a flat plate having a thickness corresponding to the joint width, the joint keeping member receives the pressing force when the block body is brought into contact with another block. Therefore, the joint width can be stably secured. Further, the joint keeping member has a top portion and a bottom portion, and at least the vicinity of the top portion narrows sharply toward the top portion, so that the joint material is distributed to both sides of the top portion and smoothly permeates into the joint.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the paving block of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows the appearance of a paving block. As shown in this figure, the paving block 11 is composed of a block body 12 and a joint keeping member 13 attached around the block body 12. Body 1
2 is a side surface 121 that comes into contact with another block body or curb,
122, 123, 124, a bottom surface 125 facing the roadbed side,
And a walking surface 126. As for the size of the block body 12, the ratio of the length L to the width W is about 1
It is selected to be 1: 1 or about 2: 1, and in this embodiment,
Length L = 238 mm, width W = 118 mm, height H = 60
Is formed.

In this embodiment, the block body 12 is made of granite which is a natural stone. When the block body 12 is formed of granite, it is first processed into a stone pillar having a cross-sectional area of L × W size at a quarrying site or a stone factory. Then, the block body 12 having the above-described size is formed by cutting the stone pillars into each thickness (height) H. The periphery of the walking surface 126 may be appropriately chamfered in consideration of the design after installation.

FIG. 2 shows side surfaces 121 to 121 of the block body 12.
This is an example of the joint keeping member 13 attached to the device 124, and shows the external configuration thereof. As shown in FIG. 2, the joint keeping member 13 is formed in a triangular shape.
As the triangular shape, triangles of various shapes such as an equilateral triangle and an isosceles triangle can be selected, but an isosceles triangle is adopted in this embodiment. The size of the joint keeping member 13 can be freely selected within the range of the height H of the block body 12, but in this embodiment, the bottom face width w = 20.
mm and height l = 45 mm. Since the joint keeping member 13 functions to secure a joint width when laying the pavement block, its thickness is, for example, in the range of 1 mm to 20 mm, preferably 2 to 3 mm, depending on the joint width. The range is appropriately selected. In this embodiment, the thickness h = 2 mm of the joint keeping member 13 is selected.

In this embodiment, as the material of the joint keeping member 13, low expanded polypropylene having a density of about 0.32 g / cm ³ is used. On one surface S of the joint keeping member 13, an adhesive material for attaching to the block body 12 and a release paper that protects the adhesive surface and is easily peelable are attached. A two-component (isocyanate-curing) acrylic adhesive is used as the adhesive. In the joint-keeping member 13 in this embodiment, first, an acrylic adhesive is applied to one surface of a low-foaming polypropylene sheet having a thickness h = 2 mm, and release paper is attached to the surface to manufacture a joint-keeping sheet. To do. Then, the joint-keeping member 13 is formed by die-cutting the joint-keeping sheet into a triangular shape. Regarding the adhesive material and the release paper, a joint-keeping sheet may be manufactured by pasting a double-sided tape made of the same material prepared in advance on one surface S of the low-foaming polypropylene sheet.

As a material of the joint keeping member 13,
Besides polypropylene, polyethylene, polyvinyl chloride,
It is preferable to use an ethylene-based copolymer such as an ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer, or a thermoplastic resin such as polystyrene. These resins are excellent in versatility, water resistance, corrosion resistance and the like. In addition, by using the low foam of these resins, it is possible to impart appropriate flexibility to the material, and the block body 12
It becomes easy to stick to. The density of the foam is selected in the range of 0.18 to 0.6 g / cm ³ in consideration of compressive strength and flexibility. 0.20 to 0.45 for polypropylene
g / cm ³ is preferable, 0.25 to 0.35 g / cm ³
Is more preferable. In the case of other resins, the density may be selected so that the same compressive strength and flexibility as the polypropylene foam can be secured. The polypropylene referred to in this example contains a propylene-ethylene copolymer having an ethylene content of 1 to 20% by weight. Also, the joint keeping member 1
The adhesive for sticking 3 to the block body 12 may be one that can firmly fix both, and various rubber-based or synthetic resin-based pressure-sensitive adhesives and adhesives are appropriately selected from commercially available products. Can be used. The adhesive may be applied to the joint-keeping member 13 at the site of paving work and then directly attached to the block body 12 before being used for paving work. Further, as the joint keeping member 13, it is also possible to use other synthetic resin such as styrene agent made of high-impact styrene, or rubber. Further, as the adhesive, when a styrene agent is used for the joint keeping member 13, it is desirable to use a chloroprene rubber adhesive (for example, trade name Diabond 1661). Further, the joint-keeping member 13 and the adhesive other than those described above are not limited as long as they are firmly fixed to the block body 12 and can secure the joint width.
Other synthetic resins and adhesives may be used.

The joint keeping member 13 thus configured
As shown in FIG. 1, each side 12 of the block body 12
1 to 124 are attached to the upper part by a predetermined width P from the bottom surface 125 side. Further, the predetermined width Q is ensured from the upper portion of the joint keeping member 13 to the walking surface 126. Here, the predetermined width P is about 5 mm in consideration of the amount of biting into the sand cushion during rolling as described later.
Has become. Further, the predetermined width Q of the upper portion is about 1 in order to conceal the joint keeping member 13 with the joint material and to enhance the interlocking force between the paving blocks by the joint material.
It is about 0 mm. The joint keeping member 13 is attached to the block body 12 by peeling off the release paper attached to the back surface of the joint keeping member 13 and adhering it. At this time, since the joint keeping member 13 has a triangular shape and has a constant area, it can be easily bonded.

FIG. 3 shows side surfaces 121 to 121 of the block body 12.
The position where the joint keeping member 13 is bonded to 124 is shown. As shown in this figure, each joint keeping member 13
Is attached to a position that avoids contact with the joint keeping member of another block when the block is brought into contact with another block body. That is, the side surfaces (12
1 and 123, 122 and 124) are bonded at different positions. As a result, when it comes into contact with another paving block, the joint keeping members 13 do not come into contact with each other, but come into contact with the side surface of the block body 12. As a specific adhesion position, in the case of the side surfaces 121 and 123, the side surface is divided into two regions a and b having virtually the same area, and a joint keeping member is located substantially at the center of the right side surface b toward the surface. 13 is glued. Also, the sides 122 and 1
In the case of 24, four regions a, b, c, which have virtually the same area,
And d are divided into four parts, and the joint keeping member 13 is adhered to the surface at approximately the center position of the even-numbered (second and fourth) regions b and d from the left.

The length L and width W of the block body 12 and the ratio of the two are considered in the number of joints of the joint keeping member 13 on each side surface, that is, the number of regions virtually dividing each side surface. When the length L or the width W is larger, the divided regions may be 6 or 8 and the joint keeping member 13 may be adhered to 3 or 4. In the present embodiment, the ratio of the number of the joint keeping members 13 adhered to the side surface of the length L and the width W is L: W = 2: 1.
The area of virtual division is made equal by setting the number of bonded sheets to be 2: 1.

In the embodiment shown in FIG. 3, the case where the joint keeping member 13 is adhered to the even-numbered area from the left side of the plurality of virtually equally divided areas has been described.
You may make it adhere | attach to the odd-numbered area | region from the left side.
Further, in the embodiment shown in FIG. 3, each side surface is divided into an even number of virtual equal areas, but it may be divided into an odd number of virtual equal areas. In this case, of the two side surfaces located on the opposite side, one surface is bonded to the joint keeping member 13 in the odd-numbered area from the left, and the other surface is bonded to the even-numbered area from the left. You may do it. For example, the sides 122 and 1 of the block body 12
When 24 is virtually divided into three areas a, b, and c, the side surface 12
The joint keeping member 13 is adhered to the area 2 at two locations a and c, and the side surface 124 is bonded to the location b at one location b.

FIGS. 4 and 5 show the arrangement of each joint keeping member 13 when the paving block of FIG. 1 is laid. FIG. 4 shows a state in which six paving blocks 11B to 11I are arranged in a lattice pattern around the paving block 11A. In this figure, 13A to 13I are paving blocks 11A, respectively.
11 shows a joint keep member bonded to ~ 11I. In the paving block shown in FIG. 1, since the areas of the virtual regions dividing each side surface are made equal, there is no contact with the joint keeping members of the other paving blocks, and the joint keeping members 13 on both side surfaces are also provided. Since they are located at equal intervals, the force is evenly distributed and stable installation is possible. Further, as shown in FIG. 5, the pavement block 11 is set to 1 in the length L direction.
Even when they are displaced by ½L, the joint keeping members 13 are positioned at equal intervals without contacting each other, and stable laying is possible. Further, in the present embodiment, since the areas of the virtual divisions with respect to the side surfaces having the length L and the width W are made equal, although not shown, the side surfaces 121 and 12 having the width W are provided.
Even when the paving blocks are arranged so that the side walls 3 and the side surfaces 122 and 124 having the length L come into contact with each other, the joint keeping member 1
Contact between the three is prevented.

Next, the work of paving the paving block of the embodiment thus constructed on a sidewalk, a road, a plaza, a floor of a building, etc. will be described in detail with reference to FIGS. 6 to 9. The paving of the paving block is performed by the operations of leveling, laying a sand cushion, laying the paving blocks, rolling compaction, and sweeping out joint sand. Hereinafter, each work will be described. FIG. 6 shows a section of the paving block in a paving state. In this figure, 31 is a curb, 32 is a roadbed, 33 is a reinforcing material, 34 is a sand cushion as a base material, and 35 is a joint material filled in the joint secured by the joint keeping member 13.

Leveling First, the pavement area is dug to a predetermined depth to make the roadbed surface 32 as flat as possible. The depth is determined according to the strength of the roadbed surface 32. When the roadbed surface 32 is weak, a crusher run,
Reinforcement is carried out with a reinforcing material 33 such as a particle size adjusting crushed stone. A sand cushion 34 is laid on the entire surface of the pavement area so as to be about 3 to 5 cm on the reinforcing surface of the reinforcing material 33, or on the roadbed surface 32 when the roadbed surface is solid, and a paving block is provided. 1
Sand cushion 34 so that the paving finish height is 1
Adjust the surface height of.

Laying of paving blocks (FIG. 7) The paving blocks 11 are laid one by one from the front side from the curb 31 or the wall of the building. At this time, as shown in FIG.
Next paving blocks 11a, 11 already laid
While pressing strongly in the direction of arrow A so that the joint keeping member 13 and the side surface of the block body 12 are in contact with each other, the arrow B along the side surface of the block body 12
It is lowered perpendicular to the direction and placed on the sand cushion 34. According to the paving block of the present embodiment, since the joint keeping member 13 is attached to the side surface that comes into contact with another paving block 11, the joint width can be accurately set by just laying the paving blocks 11 while applying each other. It can be secured and the laying time can be shortened significantly. Further, since the joint width can be easily secured, the paving blocks can be laid out without requiring special skill.

Finishing compaction (FIG. 8) After the paving blocks 11 are laid out, the walking surface 126 of the paved blocks 11 is compacted by the compactor 36 as shown in FIG. When the compactor 36 is not used, a lumber is applied to protect the pavement block and compacted by hitting the timber with a hammer. By compacting the pavement block 11, the sand cushion 34 at the bottom is compacted, and at the same time, the pavement block 11 sinks into the sand cushion 34, and sand also enters the joints secured by the joint keeping member 13. Then, the paving block 11 is further fixed. According to the paving block 11 of the present embodiment, the joint keeping member 13 is attached to the position of the predetermined width P = about 5 mm from the bottom surface of the block body 12 (FIG. 1), and the bottom portion of the joint keeping member 13 is Since it has a constant width w (FIG. 2), the amount R of biting into the sand cushion 34 due to rolling pressure is adjusted (FIG. 8), and the height of the walking surface 126 of each paving block 11 can be made uniform. it can. Further, according to the paving block 11 of the present embodiment, since the joint width is firmly secured by the joint keeping member 13, the inclination and movement of the paving block 11 due to the compaction of the compactor 36 are prevented.

Sweeping of joint material (FIG. 9) After the compaction by the rolling compaction, in order to further strengthen the interlocking of the pavement blocks 11 with each other, the joint material 35 is set in the joints set at equal intervals by the joint keeping member 13. To fill. As the joint material 35 to be filled, fine dry sand is used, and it is sprinkled on the paving block 11 that has been spread, and the sand is swept into the joint while sweeping the surface with a broom.

According to the paving block 11 of this embodiment, since the joint keeping member 13 is arranged on the side surface,
It requires less joint material 35. According to the paving block of this embodiment, since the joint keeping member 13 has a triangular shape, the joint material 35 flows on both sides of the slope of the joint keeping member 13 as shown in FIG. It can penetrate up to 34 easily. The upper part of the joint keeping member 13 is the walking surface 12 of the paving block.
Since it is arranged at a width Q downward from 6 (FIG. 1), the joint material 35 hides the joint keeping member 13, and
The interlocking force between the paving blocks 11 by the joint material 35 is enhanced. Further, since the joint keeping member 13 is formed in a triangular shape, the slope portion thereof and the joint material 35 are meshed with each other, and the pavement block 11 is effectively prevented from rising. In addition, according to the paving block 11 of the present embodiment, at least one joint keeping member 13 is adhered to all the side surfaces 121 to 124, so that when the paving block 11 is transported or loaded, other It will not come into contact with the pavement blocks and walls of the above, and the occurrence of chips and cracks will be effectively prevented.

By each of the above-mentioned operations, as shown in FIG. 6, paving with the paving blocks is completed. Since the reinforcing material 33 is used according to the strength of the roadbed 32, the case where the reinforcing material 32 is not used has been described except for FIG. 6.

The above description is for one embodiment of the paving block, and various modifications can be adopted in the present invention. For example, granite was used as the paving block, but other natural stones may be used. Further, it is possible to use various paving blocks such as concrete blocks, flat plates, bricks and curbs. Further, although the shape of the joint keeping member 13 is an isosceles triangle, it may be an equilateral triangle. Further, as shown in FIG. 10, the walking surface 12 of the joint keeping member 132 is
It is also possible to have a shape in which the tip end portion arranged at 6 is slightly cut by the length la. The cutting of the tip portion effectively prevents the joint keeping member 132 from being damaged. The joint keeping member 132 shown in FIG. 10 has the same size as the joint keeping member 13 shown in FIG. Further, the joint keeping member 13 is not limited to the triangular shape,
Other shapes exemplified in (a) to (f) may be adopted. That is, the joint keeping member 133 has the top portion 133a and the bottom portion 133b, and the width of the vicinity 133c of the bottom portion is the same as the width of the bottom portion 133b or becomes narrower toward the top 133a. The portion on the side of 133a may have a shape that narrows sharply toward the top 133a. The shape of the joint keeping member having the above shape is
It is preferable to have a bilaterally symmetrical shape because the jointing material can penetrate particularly smoothly, but it is also possible to make the right and left non-symmetrical as shown in FIG. Further, the top part 133a of the joint keeping member 133 has an acute angle, and
As shown in 2 (b), a part thereof may be cut. As for the shape of the cut portion, the tip end portion is rounded, so that the damage preventing effect is improved as compared with the modification shown in FIG. Further, the bottom portion 1 of the joint keeping member 133
33b does not necessarily have to be linear,
The shape may be a concave curve or a convex curve shown in (e). In addition, the bottom portion 133b may have a serrated shape, an uneven shape, or a wavy shape shown in FIG.

Further, in the embodiment described above, the shape of the block body 12 is a hexahedron having a length L, a width W and a height H, but various other shapes can be adopted in the present invention. . For example, as shown in FIG. 11, the paving block 112 may have a shape in which the length L and the width W are equal. In this paving block 112, the width W is about 118.
Since it is as short as mm, there is one joint keeping member 13 on each side.
Is attached, but depending on the size of width W, 2
One or more joint keeping members 13 may be attached to each surface.
It is also possible to use a pentahedral paving block by forming the walking surface and the bottom surface into triangles instead of the hexahedral paving block. In this case, the joint keeping member 1
There are three sides to attach 3.

Further, the shape of the paving block does not necessarily have to be composed of six flat surfaces, and various shapes including curved surfaces on the side surfaces can be adopted. Through holes may be provided. Further, it is possible to provide projections or long ridges for guiding blind people on the walking surface of the pavement block, and to perform various treatments such as anti-slip processing.

In this embodiment, the paving of the paving block by the interlocking type has been described, but the asphalt material or concrete surface may be used as the subgrade and the asphalt or concrete may be infiltrated as the joint material. In this case, as the thickness h of the joint keeping member 13, for example, h = 5 mm to 20 mm or so is selected depending on the construction conditions.

[0030]

According to the joint keeping member of the first to fifth aspects, the joint keeping member has a top portion and a bottom portion, and the width of the joint keeping member becomes the same as the bottom portion or becomes narrower toward the top portion. The portion on the apex side from the vicinity of the bottom portion is a flat plate having a shape narrowing sharply toward the apex,
Polyethylene, polypropylene, ethylene-based copolymer,
Since the joint keeping member is made of polyvinyl chloride, polystyrene, or a mixed resin thereof, the joint width can be stably secured, and the joint material can easily penetrate into the secured joint. it can. According to the paving blocks according to claim 6, claim 7, and claim 9, at least adjacent two of the surfaces of the block main body configured to include at least five surfaces are in contact with other block main bodies. The surface has a top portion and a bottom portion, and its width is the same width as the bottom portion in the vicinity of the bottom portion or narrows toward the top portion, and the portion closer to the top than the bottom portion is an acute angle toward the top portion. Since the joint keeping member formed of a flat plate having a narrowed shape is attached to the joint, the joint can be installed while easily setting the joint width, and the joint material can easily penetrate into the set joint. According to the paving block of claim 8, since the joint keeping member is attached to all of the surfaces of the block body that come into contact with the other block body, all the surfaces that come into contact with other paving blocks are protected. can do.

[Brief description of drawings]

FIG. 1 is an external configuration diagram of a paving block according to an embodiment of the present invention.

FIG. 2 is an external configuration diagram of a joint keeping member attached to the paving block.

FIG. 3 is an explanatory view explaining a mounting position of a joint keeping member on a side surface of the block body.

FIG. 4 is an explanatory diagram showing an arrangement of joint joint keeping members when a paving block is laid.

FIG. 5 is an explanatory view showing an arrangement of joint joint keeping members when the paving blocks are laid in another arrangement.

FIG. 6 is a sectional view showing a paving state of the paving block.

FIG. 7 is an explanatory diagram of a work for laying out pavement blocks.

FIG. 8 is an explanatory diagram of a finish rolling operation according to the above.

FIG. 9 is an explanatory diagram of a state in which the joint material permeates the joint secured by the joint keeping member.

FIG. 10 is an external configuration diagram showing another shape of the joint keeping member.

FIG. 11 is an explanatory view showing another shape of the paving block and the arrangement of joint joint keeping members.

FIG. 12 is an explanatory view showing the shape of the joint keeping member and the like in the same as above. .

[Explanation of symbols]

 11 Pavement block 12 Block body 121-124 Side surface 125 Bottom surface 126 Walking surface 13, 132 Joint keeping member 31 Curb stone 32 Roadbed 33 Reinforcing material 34 Sand cushion 35 Joint material

Front page continued (72) Inventor Osamu Yamanaka 3-8-14 Nagatahigashi, Minami-ku, Yokohama-shi, Kanagawa Sanwa Kasei Co., Ltd. (72) Inventor Naohiko Suzuki 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Kawa Electric Industry Co., Ltd.

Claims (9)

[Claims] 1. A joint keeping member which is attached to a paving block to secure a joint width with another paving block, wherein the joint keeping member has a top portion and a bottom portion and is near the bottom portion. Is a flat plate having a shape that is the same width as the bottom or narrows toward the top, and the portion closer to the top than the vicinity of the bottom is sharply narrowed toward the top. A joint-keeping member characterized by being made of any one of ethylene, an ethylene-based copolymer, polyvinyl chloride, polystyrene, or a mixed resin thereof. 2. The joint keeping member has a density of 0.18 to
The joint-keeping member according to claim 1, wherein the joint-keeping member is made of a foam of 0.6 g / cm ³ . 3. The joint keeping member has a density of 0.20 to 0.20.
The joint keeping member according to claim 1, wherein the joint keeping member is composed of 0.45 g / cm ³ of polypropylene foam. 4. The joint keeping member according to claim 1, wherein the joint keeping member has a triangular shape. 5. The joint keeping member according to claim 1, wherein the joint keeping member has a bilaterally symmetrical shape. 6. A block main body composed of at least five surfaces, and a joint keeping member attached to at least two adjacent surfaces of the surfaces of the block main body that come into contact with other block main bodies. The joint keeping member has a top portion and a bottom portion, and the width in the vicinity of the bottom portion is the same width as the bottom portion or narrows toward the top portion, and the portion closer to the top than the bottom portion is directed toward the top portion. A wearing block characterized by being configured by a flat plate having a shape narrowing sharply at an acute angle. 7. A block main body composed of at least five surfaces, and at least two adjacent surfaces of the surfaces of the block main body that come into contact with other block main bodies.
6. A paving block, comprising: the joint keeping member according to claim 5. 8. The paving block according to claim 6 or 7, wherein the joint keeping member is attached to all surfaces of the block body that come into contact with another block body. 9. The paving block according to claim 6, wherein the block body is made of a concrete block, a flat plate, a brick, a curbstone, or a natural stone.