JP4565129B2 - Road separator block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a road separator block installed in a central separator at the center of a road, and more particularly to a road separator block capable of preventing deformation.
[0002]
[Prior art]
In general, the road separator block for road surface display installed in the central divider at the center of the road has a predetermined height and shape so that the vehicle can get over in the event of an emergency. Therefore, there is a demand for strength that does not break or deform or change the installation location. The reason for preventing the deformation is that it needs to protrude from the road surface to the extent that the driver can recognize it.
[0003]
This road separation band block according to the prior art is formed so that the inside is hollow for weight reduction, and reinforcing ribs for reinforcement are connected to the inside and the bottom of the hollow body.
[0004]
Examples of documents describing the technology relating to the road separation band block include Japanese Utility Model Laid-Open Nos. 7-29005, 8-158324, and 183544.
[0005]
[Problems to be solved by the invention]
Although the road separation band block according to the prior art is lightweight and has a predetermined strength, it may be deformed when a large load is applied due to a large vehicle getting on or colliding, and may not return to its original shape. It was. That is, when the road separation band block according to the prior art is subjected to an excessive load, the reinforcing rib inside the block is deformed and the reinforcing rib is integrally formed with the block surface, so that it does not return to its original shape. In addition, there is a problem that stress concentrates on the joint portion with the reinforcing rib and a crack may occur.
[0006]
In order to increase the strength of the block, it has been proposed to provide a reinforcing rib consisting of a number of vertical and horizontal ribs inside the block, but it is too heavy and difficult to transport, install and remove. There was a bug.
[0007]
An object of the present invention is to eliminate the inconvenience caused by the prior art, and to provide a road separation band block for road surface display that is lightweight and can easily return to its original shape even when a load is applied. That is.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a rectangular upper surface portion, an inclined portion that inclines from the upper surface portion toward four sides of the rectangular shape, and a bottom surface portion that covers a lower edge of the inclined portion. A resin road separating band block comprising a hollow portion covered with the upper surface portion, the inclined portion, and the bottom surface portion, and having a cross section with a height not contacting the upper surface portion and the inclined portion on the bottom surface portion. The first feature is that it has a plurality of trapezoidal and hollow columnar projections, and in the road separation band block of the first feature, the second feature is that the columnar projections extend in a direction toward the upper surface portion. In the road separation band block according to the second feature, the top of the columnar protrusion has a certain distance from the top surface, and is configured to limit deformation of the top surface. Is the third feature.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a road separation band block according to an embodiment of the present invention will be described. First, the principle of the road separation band block according to the present invention will be described. FIG. 4 is a diagram for explaining the principle of a road separation band block according to the present invention, and FIG. 5 is a diagram for explaining a road separation band block according to the prior art as compared with FIG.
[0010]
As described above, the road separation band block 9 according to the prior art shown in FIG. 5 may be deformed by buckling of the reinforcing rib 9b inside the block when an excessive load is applied by a large vehicle or the like. The road separation band block 9 has a reinforcing rib 9b that blocks even when a restoring force (elastic force) for returning the block upper surface 9a to its original shape remains after the vehicle or the like leaves. Since the upper surface 9a and the upper surface 9a are integrally molded, the reinforcing rib 9b formed integrally with the upper surface 9a may prevent the block upper surface 9a from being restored and may not return to the original shape as the entire road separation band block.
Further, the stress concentration generated in the joint portion between the block upper surface 9a and the reinforcing rib due to the load may cause the block upper surface 9a to crack.
[0011]
On the other hand, the road separation band block 1 according to the present invention has a columnar protrusion 2b that protrudes upward from the bottom surface of the hollow body structure of the block. For this reason, in the road separation band block 1 according to the present invention, even when the buckling 2e remains and deforms in the columnar protrusion 2 as shown in FIG. As a whole, it can be restored to its original shape and cracks are less likely to occur.
[0012]
Hereinafter, an embodiment of a road separation band block according to the present invention will be described in detail. FIG. 1 is a diagram showing a plane and a side of a road separation state block according to the present embodiment, and FIG. 2 is a diagram showing a plane, a side and a bottom surface of the road separation block when the road is not installed. 3 is a view for explaining the cross-sectional structure of FIG.
[0013]
The road separating band block 1 according to the present embodiment shown in FIG. 1 has an inclined side surface as shown in FIG. 1 (A) showing the top surface and FIGS. 1 (B) and (C) showing the side surfaces. A trapezoidal, rectangular, hollow embedded anchor 5 for fixing to a road surface, a bolt 3 passed through a through hole communicating with the embedded anchor 5 passing therethrough, and a flat washer 4 attached to the bolt 3 , A cap 6 for covering and protecting the upper part of the bolt 3 is provided. The embedded anchor 5 is inserted into a block mounting hole on the road surface (not shown), screwed through the bolt 3, and the upper part of the bolt 3 is cap 6 It is comprised so that it may be fixed to the road surface by covering with.
[0014]
The material of the road separation band block according to the present embodiment is high density polyethylene, and the properties thereof are a density of 0.949 g / cm ² (test method: JIS K6760 standard) and a tensile fracture strength of 45 MPa (test method: JIS K6760 standard), tensile fracture elongation is 900% (test method: JIS K6760 standard), and Izod impact value is 49 kJ / m ² (test method: JIS K7110 standard), but low density polyethylene, polyurethane, etc. This resin may be used. These are molded by a method such as blow molding.
[0015]
FIG. 2 is a view showing the outer shape of only this road separation band block 1, FIG. 2 (A) showing the top surface, FIGS. 2 (B) and (C) showing the side surfaces, and FIG. It has a shape as shown in D). As shown in FIG. 2 (D), the bottom surface of the road separation band block 1 itself has a plurality of shapes (annular, ring shape) for preventing slippage between the two through holes 7 for penetrating the bolt 3 and the road surface. A plurality of anti-skids 10 (vertical bar shape, horizontal bar shape) are also used as columnar protrusions, which will be described later, to increase the resistance of side slip due to external pressure after installation on the road surface.
[0016]
A cross section of the road separation strip block 1 according to the present embodiment will be described with reference to FIG. 3A is a view showing a cross section AA in FIG. 2D, and FIG. 3B is a view showing a cross section BB in FIG.
[0017]
First, as shown in FIG. 3A, the AA cross section of the road separation strip block 1 according to the present embodiment is such that the left columnar protrusion 2a protrudes from the bottom surface toward the inclined side surface of the block, and the right columnar protrusion 2b. Protrudes from the bottom surface of the block with respect to the hollow structure ceiling (upper surface). That is, in this block, in the internal hollow body structure, the annular top portion of the small-diameter anti-slip 10 in FIG. 2 (D) protrudes toward the inclined portion of the hollow structure body of the block, and the large-diameter anti-slip Ten circular tops protrude in the direction of the ceiling (upper surface) of the hollow structure of the block, and the deformation of the upper surface of the hollow structure is limited.
[0018]
Furthermore, as shown in FIG. 3 (B), the BB cross section of the road separation band block 1 according to the present embodiment has a columnar protrusion having an annular top, similar to the small-diameter anti-slip 10 of FIG. 2 (D). 2d protrudes in the direction of the inclined portion of the hollow structure of the block, and forms a structure that restricts deformation of the upper surface of the hollow structure.
[0019]
As described above, in the road separation strip block 1 according to the present embodiment, the anti-slip 10 forming a part of the bottom surface protrudes toward the inclined portion and the upper portion (ceiling portion) of the hollow body structure inside the block, and the top portion of the protrusion Since the block has a certain distance from the inclined part and the upper part (ceiling part) of the hollow structure in the block, when an excessive load is applied, the upper surface part of the block bends to absorb the impact and then the deflection The top of the columnar projections suppresses the deformation of the block top surface, thereby limiting the amount of deflection to a certain amount to prevent the block top surface from being destroyed.In addition, when the load is removed, the block quickly returns to its original shape. It helps to restore.
[0020]
Moreover, even if the columnar protrusion is buckled by a load, the road separation band block 1 according to the present embodiment can return to its original shape without being affected by the buckled columnar protrusion at all. . In addition, since the columnar protrusion is not connected to the upper surface of the hollow body structure, there is no stress concentration at the connecting portion when a load is applied, thereby preventing a crack from occurring on the upper surface of the hollow body structure.
[0021]
【The invention's effect】
As described above, the road separation band block for road surface display according to the present invention includes the columnar protrusions protruding in the upper surface direction from the bottom surface of the hollow body structure in the hollow body structure, and the top of the columnar protrusion and the upper part of the block (ceiling). Even if an excessive load is applied by the vehicle or the like and the columnar protrusion is deformed, the upper surface of the block is not affected by the deformed columnar protrusion at all, and the original It can return to the shape of Moreover, it can prevent that a crack arises in a connection part.
[Brief description of the drawings]
FIG. 1 is a diagram showing a plane and a side view of a road installation state of a road separator block according to an embodiment of the present invention.
FIG. 2 is a view showing a plane, a side surface, and a bottom surface of the road separation band block in a road non-installation state.
FIG. 3 is a view for explaining a cross-sectional structure of the road separation band block of FIG. 2;
FIG. 4 is a diagram for explaining the principle of a road separation band block according to the present invention.
FIG. 5 is a diagram for explaining a road separation band block according to the prior art as compared with FIG. 4;
[Explanation of symbols]
1: road separation band block, 2: columnar protrusion, 3: bolt, 4: flat washer, 5: buried anchor, 6: cap, 7: through hole, 9: road separation band block, 2a to 2e: columnar protrusion .

Claims (3)

The upper surface portion, the inclined portion, and the bottom surface, each including a rectangular upper surface portion, an inclined portion inclined from the upper surface portion to four sides of the rectangular shape outward, and a bottom surface portion covering a lower edge of the inclined portion. A resin road separation band block formed with a hollow part covered with a part,
A road separation band block comprising a plurality of columnar protrusions having a trapezoidal and hollow cross section at a height not contacting the upper surface portion and the inclined portion on the bottom surface portion . The road separation band block according to claim 1, wherein the columnar protrusion extends in a direction toward the upper surface portion . 3. The road separation band block according to claim 2, wherein a top portion of the columnar protrusion has a certain distance from the upper surface portion to limit deformation of the upper surface portion .

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