JP4489827B1 - Pavement block and method for manufacturing the same - Google Patents

Abstract

Provided are a paving block which can improve workability at the time of laying, can prevent corner contact due to misalignment between blocks, and can prevent corner chipping and peeling, and a method for manufacturing the same.
A block main body 110 having a pavement block 100 laid on a road surface and having four side surfaces 112, 113 and four projecting corner portions 115 formed by the four side surfaces 112, 113, and each projecting corner. One side surface forming the portion 115 is provided with a corner joint 120 that protrudes in the thickness direction of the flat plate, and one side 122 of each joint keep 120 forms the other corner 115. It is formed on the same surface as the side surface. In this way, since one side surface 122 of the joint keep 120 is on the same plane as the other side surface of the protruding corner portion 115, corner contact due to misalignment between the paving blocks 100 can be prevented. Separation can be prevented.
[Selection] Figure 1

Description

  The present invention relates to a paving block laid on a road surface and a method for manufacturing the same.

  The pavement block is provided with protrusions (joint keeps) in order to reduce the work burden of opening the joint width. The joint is formed by filling joint materials such as sand between paved blocks, and functions as a cushion between the paving blocks. It is important that the joints are filled with sand, especially on roads where large vehicles enter. A conventional pavement block is provided with a vertical streak-like protrusion having a width of about 10 mm as a joint keep at a position about 20 mm from the edge (see, for example, Patent Documents 1 to 3).

  In addition, a so-called interlocking block in which a joint keep is provided at or near a corner is also known (see, for example, Patent Documents 4 and 5). In addition, an example has been proposed in which a square spacer is inserted into a corner of a square plate-like concrete block to maintain a gap.

JP-A-7-34405 JP 7-286301 A Japanese Patent Laid-Open No. 3-115603 JP 2000-240002 A Japanese Patent Laid-Open No. 2000-257003 JP 2001-288702 A

  Thus, the joint width can be maintained by providing the joint keep as described above. However, in the pavement block as described above, lateral displacement between the pavement blocks occurs after laying, and the joint keep is easily worn. When the joint keep is worn, the paving blocks are damaged due to contact between the paving blocks such as peeling of the corners of the surface. Further, if the joint keep is not integrated with the paving block, it is necessary to install a spacer, which increases the complexity.

  The present invention has been made in view of such circumstances, and can improve workability during laying, can prevent corner contact due to misalignment between blocks, and can prevent corner chipping and peeling. An object is to provide a block and a method for manufacturing the block.

  (1) In order to achieve the above object, a paving block of the present invention is a paving block laid on a road surface, and has a main body having four side surfaces and four projecting corners formed by the four side surfaces. And a corner joint that protrudes in the thickness direction of the flat plate on one side surface that forms each projected corner portion, and one side surface of each joint keeps each said projected corner portion It is characterized in that it is formed on the same surface as the other side surface forming the.

  As described above, the pavement block of the present invention has one side surface of the joint keep being on the same plane as the other side surface in the protruding corner portion, and therefore can prevent corner contact due to misalignment between the blocks. Chipping and peeling can be prevented. In addition, since the joint keep is flat, it is easy to lay paving blocks and workability is improved.

  (2) Further, in the paving block of the present invention, the ratio of the width of the projected joint keep to the length of the side face on which the joint keep is projected is 20% or more and less than 70%. Yes. By making the width of the joint keep wide, the blocks are firmly fixed by the joint keep, and the joint keep is hard to wear and the joint keep is not easily displaced.

  (3) Further, the paving block of the present invention is formed in a rectangular shape so that the ratio of the length in the short side direction to the length in the long side direction is 1: 2, and on the opposing long side surfaces, When a vertical plane is assumed in the center, a center joint keep is further provided at the angle of the vertical plane.

  Thus, when paving blocks are paved by a method of laying blocks such as herringbone bond 90 ° patterns, stretcher bond patterns, and basket weave patterns without gaps, joint keeps of each block come into contact with each other. . As a result, adjacent blocks are firmly fixed and the joint keep is not worn. Therefore, the relative position of the blocks is difficult to shift.

  (4) Moreover, the paving block of the present invention is characterized in that the main body portion has a notch at a position where each joint keep fits when laid on a road. Accordingly, the relative positional relationship can be firmly fixed and the lateral displacement can be prevented while reducing the joint width.

  (5) Moreover, the manufacturing method of the paving block of the present invention is a manufacturing method of the paving block laid on the road surface, and has a wide rectangular groove opened in the bottom direction on one surface of each corner. A step of filling concrete or mortar into a formwork in which a side surface of the rectangular groove is formed on the same plane as the other surface of the corner, and a step of vibrating and pressing the filled concrete or mortar. And a step of immediately removing the block formed by vibration pressing from the mold and curing the block.

  As described above, the method for producing a paving block according to the present invention produces a paving block by pouring concrete or mortar into a formwork in which the side surface of the rectangular groove is formed on the same surface as the other surface of the corner. To do. Thereby, a joint keep is formed at the protruding corner portion of the paving block, corner contact due to positional deviation between the blocks can be prevented, and corner chipping and peeling can be prevented.

  According to the present invention, corner contact due to displacement between blocks can be prevented, and corner chipping and peeling can be prevented. In addition, since the joint keep is flat, it is easy to lay paving blocks and workability is improved.

1 is a perspective view of a paving block according to Embodiment 1. FIG. 1 is a plan view of a paving block according to Embodiment 1. FIG. 1 is a side view of a paving block according to Embodiment 1. FIG. 1 is a side view of a paving block according to Embodiment 1. FIG. It is a figure which shows an example of the laying pattern of the block for paving which concerns on Embodiment 1. FIG. It is a figure which shows an example of the laying pattern of the block for paving which concerns on Embodiment 1. FIG. It is a figure which shows an example of the laying pattern of the block for paving which concerns on Embodiment 1. FIG. It is a figure which shows the one scene in the manufacturing process of the block for paving which concerns on Embodiment 1. FIG. It is a figure which shows the one scene in the manufacturing process of the block for paving which concerns on Embodiment 1. FIG. 6 is a plan view of a paving block according to Embodiment 2. FIG. 6 is a plan view of a paving block according to Embodiment 2. FIG. 6 is a plan view of a paving block according to Embodiment 2. FIG.

  Embodiments of the present invention will be described below.

[Embodiment 1]
(Configuration of paving block)
FIG. 1 is a perspective view of a paving block. 2A is a plan view of the paving block, and FIGS. 2B and 2C are side views of the paving block. The paving block 100 is a block laid on the road surface, and is used not only for sidewalks but also for roadways. The paving block 100 is formed of one or both of concrete and mortar. As shown in the figure, the paving block 100 includes a main body 110 and joints 120 and 130.

  The main body 110 includes an upper surface 111, a lower surface 114, two long side surfaces 112, and two short side surfaces 113. The main body 110 has four protruding corners 115 formed by four side surfaces. The upper surface 111 has an inclined step 111a at the edge. The main body 110 is formed in a rectangular shape with a size of, for example, 100 mm × 200 mm, and the ratio of the length in the short side direction to the length in the long side direction is 1: 2. This ratio is not necessarily 1: 2, but when used on a roadway, a 1: 2 ratio of paving blocks is preferred.

(Keep joints)
Each joint keep can be classified into a corner joint 120 and a center joint 130 according to the installation position. The corner joint keep 120 is formed in a flat plate shape and protrudes in the flat plate thickness direction on one side surface forming each protruding corner portion 115. Then, one side surface 122 of the corner joint keep 120 is formed on the same surface as the other side surface forming each protruding corner portion 115. For example, the side surface 122 of the joint keep 120 formed on the short side surface 113 of the paving block 100 is aligned with the long side surface 112 of the paving block 100. Thereby, it is possible to prevent the corners of the paving blocks 100 (protruding corners 115 near the upper surface 111) from coming into contact with each other due to the positional deviation between the paving blocks 100, and it is possible to prevent corner chipping and peeling. It should be noted that the joint keep 120 is provided at each protruding corner 115 so that the joint keep 120 inevitably has four side surfaces of the paving block 100 at an equivalent position clockwise or counterclockwise when viewed from the upper surface 111. In addition, the side surface 122 of the joint keep 120 is in contact.

  On the other hand, a joint keep 130 is provided in the center of the side surface 112 at a center symmetrical position. In other words, the center joint keep 130 is provided at the position of the complex angle of the vertical surface A on the long side surface 112 when the vertical surface A is assumed to be the center on the opposite long side surface 112. By arranging the central joint keep 130 as described above, the joint keeps 120 do not interfere with the placement of any of the laying methods described later.

  In the case where the joint keep is a small protrusion having a semicircular cross section as in the prior art, when the automobile passes the road surface, the block is displaced and the joint width gradually opens. When the block is inclined, the corners on the surface come into contact with the adjacent block, and the corners are missing. However, since the pavement block 100 is provided with the central joint keep 130, it can be placed at the correct position if the side faces 132 of the joint keep 130 are placed against each other at the time of laying. Bite each other. Thus, the joint joint 130 at the center also has a function of positioning the block, and the paving block 100 is highly convenient in construction. Further, when the vehicle passes on the road surface, the blocks may gradually shift and the joints open. However, once the paving block 100 is laid, the joint keeps are in contact with each other and are not easily displaced laterally.

  The side surface of the paving block 100 may not necessarily be a flat surface but may be formed in a corrugated shape. In this case, the angle formed by the protruding corner 115 is not 90 °, but the joint keep 120 can be provided. Each joint keep 120, 130 has the same shape and a thickness of about 1.5 to 10 mm. When the joint width is about 3 mm, the thickness of the joint keeps 120 and 130 is preferably 1.5 to 3 mm.

  Regarding the joint width, when the paving block 100 is laid, since the dimensional accuracy of the joint width is not high, a dimensional error is recognized in the block precision. When the joint width is 3 mm, the joint width is 4 to 5 mm when the thickness of the joint keeps 120 and 130 is 3 mm. Therefore, the thickness of the joint keeps 120 and 130 is designed slightly smaller. Further, the length of the joint keeps 120 and 130 in the longitudinal direction is slightly shorter than the height of the paving block 100.

  The joint keeps 120 and 130 are formed in a wide flat plate shape, and the ratio of the width of the joint keeps 120 and 130 to the length of the side surface 112 or 113 of the paving block 100 is 20% or more and less than 70%. The width of the conventional joint keep is 10% or less with respect to the side surface of the paving block, and it is semicircular in cross section and easily wears. However, the joint keeps 120 and 130 have a wide flat plate shape and the width described above. Since the ratio with respect to the length of the side surface of the paving block 100 is 20% or more, it is difficult to wear. Further, the joint keeps 120 and 130 are formed in a flat plate shape having a rectangular cross section, and their main surfaces 121 and 131 are flat, so that they are not easily worn. However, the corners of the main surface ends of the joint keeps 120 and 130 do not need to be sharp edges, and may be slightly rounded. Further, the corners at both ends of the upper surface of the joint keep may be dropped, or the upper surface may be convex upward. By making the corners of the upper surface obtuse or round and have no corners, it is preferable because the filling property of the concrete at the time of block production is enhanced.

  Moreover, as the contact area between the paving blocks 100 increases, a lateral shift is less likely to occur, and the arrangement of the blocks becomes stable. On the side surfaces of the blocks where the paving blocks 100 are in contact with each other, the width occupied by the joint keeps 120 and 130 engaged with the length of the side surfaces is preferably about 50%. And since the remaining 50% of the area is filled with sand, the load transfer rate can be increased and the load can be distributed among the paving blocks 100.

  On the other hand, the ratio of the width occupied by the joint keeps 120 and 130 to the length of the side surfaces 112 and 113 of the paving block 100 is less than 70%. When it becomes 70% or more, the frictional resistance due to joint sand becomes insufficient, and it tends to shift.

  In the above example, the paving block 100 has a rectangular shape with an aspect ratio of 1: 2, but may be a paved square plate (an aspect ratio of 1: 1). In that case, for example, the dimensions can be 300 mm × 300 mm. In addition, the aspect ratio of the paving block 100 may be 1: 3 or 1.5: 2. In this way, the pavement block 100 whose aspect ratio is not 1: 2 is sufficient if the joint keeps 120 are at the four corners, and the joint keep 130 need not be provided at the center. For example, a method of laying a square pavement block 100 while shifting its width by half is not usually employed. However, the pavement block 100 has at least corner joints 120 regardless of the shape.

(Playing block laying method)
3A, 3B, and 3C are diagrams illustrating an example of the laying pattern of the paving block 100. FIG. The example of FIG. 3A is a herringbone bond 90 ° pattern, the example of FIG. 3B is a stretcher bond pattern, and the example of FIG. 3C is a basket weave pattern. Blocks are often laid by the herringbone bond 90 ° pattern on the road surface through which automobiles pass. Regardless of the laying method described above, the joint keeps 120 of the paving blocks 100 abut on the side surfaces 122 thereof. As a result, the adjacent pavement blocks 100 are firmly fixed, and the joint keeps 120 and 130 are not worn. Further, the relative positions of the paving blocks 100 are not easily displaced.

  When laying, the paving block 100 is disposed at a predetermined position, and after the paving block 100 is laid, the joints between the paving blocks 100 are filled with sand. The effect of load transmission is generated by meshing the filled joint sand, and the load is dispersed. As a result, the relative position of the paving block 100 is maintained.

(Pavement block manufacturing method)
Next, a method for manufacturing the paving block 100 will be described. 4A and 4B are diagrams showing a scene in the manufacturing process of the paving block 100, respectively. First, on the iron plate 140, a wide rectangular groove opened in the bottom direction is provided on one surface of each corner, and the side surface of the rectangular groove is formed on the same surface as the other surface of the corner. A mold 150 is prepared (details not shown). With such a shape of the formwork, it is possible to form a paving block 100 in which one side surface 122 of the corner joint keep 120 is formed on the same surface as the other side surface forming each protruding corner portion 115.

  Next, a so-called zero slump base layer concrete 172 is filled into the mold 150, and a surface mortar 171 containing a coloring pigment is poured thereon. Then, as shown in FIG. 4A, vibration is applied while pressing the poured concrete and mortar with a press plate 160. Immediately thereafter, the mold 150 is pulled upward while pressing the formed block with the press plate 160. Then, the block is carried to the curing room as it is, and is cured for a predetermined period as shown in FIG. 4B, whereby the paving block 100 is completed.

  The rectangular groove is a groove for forming the joint keeps 120 and 130. Since this rectangular groove is formed wide, concrete and mortar are easily spread, and the joints 120 and 130 having desired shapes are easily formed. Further, it is preferable to immediately pull out the pressurized block as described above to obtain an immediate demolded product.

  In addition, the above manufacturing method is so-called surface molding by vibration pressure molding, but it may be backing by pressure molding, and the positions of the surface mortar 171 and the base layer concrete 172 may be upside down. In that case, mortar with high fluidity is poured underneath, and a so-called zero slump concrete with little moisture is filled thereon. At this time, care must be taken because the formwork becomes obstructive and the block cannot be removed unless the joint keeps 120 and 130 have a shape extending from the upper surface 111 to the lower surface 114 of the block.

[Embodiment 2]
(Pavement block with notches)
In the above embodiment, the paving block 100 has only the joint keeps 120 and 130 protruding for meshing, but the joint keeps 120 and 130 may be fitted by providing notches. . 5A, 5B, and 5C are a plan view and side views of the paving block 200 having the notches 220 and 230, respectively. As shown in the figure, the paving block 200 includes a main body 210 and joint keeps 120 and 130. The main body 210 includes an upper surface 211, a lower surface 214, two long side surfaces 212, and two short side surfaces 213. The main body 210 has four projecting corners 215 formed by four side surfaces, and the notches 220 are located at positions where the joint keeps 120 and 130 are fitted when the paving block 200 is laid on the road. , 230. The upper surface 211 has an inclined step 211a at the edge thereof.

  The corner joint keep 120 is formed in a flat plate shape projecting in the flat plate thickness direction on one side surface forming each protruding corner portion 215. Then, one side surface 122 of the corner joint keep 120 is formed on the same surface as the other side surface forming each protruding corner portion 215. On the other hand, a joint keep 130 is provided in the center of the longitudinal side surface 212 of the paving block 200 at a centrally symmetric position. In other words, the center joint keep 130 is provided at an angle of the vertical surface A on the long side surface 212 when the vertical surface A is assumed to be the center on the opposite long side surface 212.

  The notches 220 and 230 are provided at positions where the joint keeps 120 and 130 are fitted when the paving block 200 is laid on the road. For example, a notch 220 is provided on the other side surface of each protruding corner 215 so that the corner joint 120 is fitted. When the central joint keep 130 is provided, a notch 230 in which the central joint keep 130 is fitted is provided at a position adjacent to the central joint keep 130 via the vertical surface A at the center of the side surface. These notches 220 and 230 are provided from the upper surface 211 to the lower surface 214 of the paving block 200 so that the die can be easily removed. As a result, the relative positional relationship between the paving blocks 200 can be firmly fixed and the lateral displacement can be prevented while reducing the joint width.

100 Pavement block 110 Main body 111 Upper surface 111a Step 112 Long side surface 113 Short side surface 114 Lower surface 115 Projection corner 120 Corner joint keep 121 Joint keep main surface 122 Joint keep side surface 130 Center joint keep 131 Central joint keep main Surface 132 Joint side surface 140 Iron plate 150 Formwork 160 Press plate 171 Surface layer mortar 172 Base layer concrete 200 Pavement block 210 Main body 211 Upper surface 211a Step 212 Long side surface 213 Short side surface 214 Lower surface 215 Exit corner

Claims (5)

A paving block laid on the road surface,
A main body having four side surfaces and four projecting corners formed by the four side surfaces;
On one side surface forming each protruding corner portion, a flat joint and a corner joint projecting in the flat plate thickness direction are provided,
One side surface of each joint keep is formed on the same surface as the other side surface forming each protruding corner portion. The pavement block according to claim 1, wherein the joints at the four corners are arranged at equivalent positions clockwise or counterclockwise when viewed from above. It is formed in a rectangle so that the ratio of the length in the short direction and the length in the long direction is 1: 2,
3. The pavement according to claim 1, further comprising a central joint keep at a position of an angle of the vertical surface on the opposite long side surface when a vertical surface is assumed at the center of the long side surface. For block. It is a manufacturing method of the block for paving in any one of Claims 1-3,
A rectangular or wide rectangular groove that opens in the bottom direction is formed on one surface of each corner, and the side surface of the rectangular groove is formed on the same surface as the other surface of the corner. Filling the mortar;
  A step of vibration-pressing or pressure-molding the filled concrete or mortar, and a step of immediately removing the mold formed from the vibration pressure-forming or pressure-molding from a mold and curing the block. The manufacturing method of the block for pavements characterized by the above-mentioned. A formwork used in the method for producing a paving block according to claim 4.

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