JP3181117U - Concrete blocks - Google Patents

Abstract

The present invention provides a concrete herbicidal block that is relatively easy to manufacture and that can suppress the occurrence of defects.
The block has at least one side surface 10 that functions as an abutting surface for the paving structure, and the side surface 10 is a side surface portion that extends downward from the vicinity of the upper end of the side surface in the installation posture of the block. It has an upper side surface portion 11 and a lower side surface portion 12 that is a side surface portion extending upward from the vicinity of the lower end portion of the side surface. The side surface 10 is provided with a stepped surface 70 facing upward. The stepped surface 70 is obliquely upward from the first substantially horizontal portion 71 extending in the substantially horizontal direction from the lower end portion of the upper side surface portion 11 and the end portion of the first substantially horizontal portion 71 opposite to the upper side surface portion 11. A slope portion 72 that extends, and a second substantially horizontal portion 73 that extends in a substantially horizontal direction from an end portion of the slope portion 72 opposite to the first substantially horizontal portion 71 and is connected to the upper end portion of the lower side surface portion 12. .
[Selection] Figure 1

Description

  The present invention relates to a concrete block having a weedproof function.

  Generally, on the road, a concrete boundary block is provided between the roadway and the sidewalk or between the roadway and the median. As a construction method of such a road, a method of forming a roadway or a sidewalk by placing a pavement material such as concrete or asphalt concrete on the side surface of the boundary block previously installed and drying and curing it. In this case, a vertical gap may be generated between the pavement structure and the boundary block due to dry shrinkage of the pavement structure such as concrete or asphalt concrete over time.

  In some cases, soil, dust, rainwater or weed seeds enter through such gaps, and weeds grow. If such weeds are left unattended, the landscape deteriorates as they grow, and further, the grown weeds block the sight of drivers and pedestrians and protrude to the roads and roadways, thereby improving traffic safety. The problem of significant reduction can occur. Therefore, it is necessary to periodically remove weeds, the work itself is dangerous and enormous work costs are generated.

  Various boundary blocks have been proposed that aim at the effect of suppressing the growth of weeds from the gap between the pavement structure and the boundary block (that is, the weed prevention effect). 6 (A) is a cross-sectional view showing a shelf 501 by cutting off the vicinity of the upper end of the side of the boundary block 500 on the side of the pavement structure (left side in the figure), and the cross-sectional shape of the shelf 501 is substantially the same. It is V-shaped (see, for example, Patent Document 1). In FIG. 6B, the cross-sectional shape of the shelf 601 provided on the side surface of the boundary block 600 is formed into a pointed shape (see, for example, Patent Document 2). A boundary block 700 in FIG. 6C is a shelf 701 provided with a band-like body 702 having a convex cross section (see, for example, Patent Document 3).

  Each of these boundary blocks 500, 600, and 700 aims to suppress the growth of weeds by utilizing the positive territoriality of the roots of weeds (plants). That is, the roots of the weeds generated in the gap between the pavement structure and the boundary block above the shelf extend downward along the side surface of the boundary block. In that case, the extending direction of the root is forcibly changed by the shape of the shelf. 6 (A), 6 (B), and 6 (C), the extending direction of the root is made upward by the uphill inclined surface of the V shape or the peak shape of the shelf, and at that time, the root has a positive flexing property. Therefore, it cannot continue to grow upward, and the roots cannot grow and die.

Japanese Patent No. 3900500 Design Registration No. 1396803 Japanese Patent Laid-Open No. 11-13199 Japanese Patent No. 3698265

  However, the product length of the boundary block is short, 60 cm, 1 m, or 2 m, and the boundary block 500 in FIG. 6A has an acute angle cross-sectional shape on the tip side (the left side in the drawing) of the shelf 501. It has become. Therefore, when manufacturing or transporting the block 500 or rolling asphalt or the like to the top of the boundary block, the acute angle part is partial and easily damaged, and the purpose of changing the route upward is lost. End up. On the other hand, in the boundary block 600 of FIG. 6B, since the top surface of the shelf 601 has a pointed shape, it is easy for defects to occur in this portion. In addition, the boundary block 700 in FIG. 6C has a complicated structure in which the shelf portion 701 has a belt-like portion 702 having a convex cross section, and further, a defect is easily generated in this portion, and at the time of manufacturing. Are easily lost. In addition, as other prior art documents related to the herbicidal structure, the one described in Patent Document 4 is more complicated in the gradient shape of the root of the boundary block than the blocks shown in FIGS. 6 (A), (B), and (C). Therefore, since there is no draft at the time of demolding of the boundary block, it is extremely difficult to manufacture and it is easy to be lost.

  Accordingly, an object of the present invention is to provide a concrete grass protection block that is relatively easy to manufacture and that can suppress the occurrence of defects.

The block according to the first aspect of the present invention is
Having at least one side surface that functions as an abutment surface for the pavement structure;
The side surface is an upper side surface portion that is a side surface portion that extends downward from the vicinity of the upper end portion of the side surface in the installation posture of the block, and a lower side surface portion that is a side surface portion that extends upward from the vicinity of the lower end portion of the side surface in the installation posture. And
The side surface is provided with a step surface facing upward in the installation posture,
In the installation posture, the step surface includes a first substantially horizontal portion extending in a substantially horizontal direction from a lower end portion of the upper side surface portion, and an end portion of the first substantially horizontal portion opposite to the upper side surface portion. A slope portion extending obliquely upward, and a second substantially horizontal portion extending in a substantially horizontal direction from an end of the slope portion opposite to the first substantially horizontal portion and connected to an upper end portion of the lower side surface portion; It is a block characterized by comprising.

  With such a configuration, a gap is generated between the pavement structure and the upper side surface portion, and weed seeds, rainwater, etc. enter the generated gap, roots are generated from the seed, and the root is the upper side surface portion. Since the slope portion rises obliquely upward from the boundary with the first substantially horizontal portion even if it grows along the first substantially horizontal portion from the root, extension of the root upward from the boundary is suppressed. As a result, weed growth can be effectively suppressed and killed. In addition, since there are no sharp corners, pointed heads, or convex parts on the step surface, it is possible to suppress the occurrence of defects, and there is a draft on the step surface at the time of demolding. Easy.

In the block according to the second aspect of the present invention, the upper side surface portion has a gradient in the installation posture of the block.
By adopting such a configuration, it is possible to provide a draft at the time of block manufacture also in the upper side surface portion, so that smoother demolding is possible.

The block according to the third aspect of the present invention is configured such that an angle formed by the slope portion with respect to the vertical direction in the installation posture is within a range of 2 degrees to 75 degrees.
By setting it as such an angle, since it is easy to extract from a formwork in a manufacturing process, manufacture is comparatively easy, and a grass prevention effect can be exhibited suitably after installation.

1A and 1B are schematic views showing a boundary block according to the first embodiment of the present invention. FIG. 1A is a front view, and FIG. 1B is a boundary block of FIG. 1C is a cross-sectional view of the boundary block of FIG. 1A along the alternate long and short dash line IC-IC, and FIG. 1D shows the region ID in FIG. It is an expanded sectional view expanding and expressing. 2A and 2B are schematic views showing a boundary block according to the second embodiment of the present invention. FIG. 2A is a cross-sectional view, and FIG. 2B is an enlarged view of a region IIB in FIG. It is an expanded sectional view showing. 3A and 3B are schematic views showing a side groove block as a modified example of each embodiment of the present invention. FIG. 3A is a cross-sectional view, and FIG. 3B is an enlarged view of a region IIIB in FIG. FIG. FIG. 4 is a schematic view showing a retaining wall block as another modified example of each embodiment of the present invention. FIG. 4 (A) is a sectional view in an installed state, and FIG. 4 (B) is FIG. 4 (A). It is an expanded sectional view showing a region IVB in an enlarged manner. FIG. 5 is a schematic view showing a retaining wall block as still another modified example of each embodiment of the present invention. FIG. 5 (A) is a sectional view in an installed state, and FIG. 5 (B) is FIG. It is an expanded sectional view which expands and represents the area | region VB in the inside. 6A to 6C are cross-sectional views schematically showing boundary blocks according to a plurality of conventional examples.

(First embodiment)
A block according to a first embodiment of the present invention will be described with reference to FIG.
The block according to the present embodiment is a boundary block 1 made of concrete, FIG. 1A is a front view, and FIG. 1B is an upper surface of the boundary block 1 viewed in the direction of an arrow IB in FIG. FIG. 1C is a cross-sectional view showing the boundary block 1 along the broken line IC-IC in FIG. The vertical direction in FIG. 1C is substantially the same as the vertical direction when the boundary block 1 is actually used.

  In the actual use state of the boundary block 1, the left side surface (referred to as the first side surface 10) in FIG. 1C of the boundary block 1 is a pavement such as a sidewalk or a roadway made of a paving material such as asphalt or asphalt concrete. Functions as an abutment surface with the structure. Although the structure constructed | assembled on the side of the 2nd side surface 20 on the opposite side to the 1st side surface 10 is arbitrary, suppose that it is a pavement structure here. The boundary block 1 has a pair of connecting surfaces 30 that are surfaces intersecting the first and second side surfaces 10 and 20. These connection surfaces 30 are surfaces that face each other when the plurality of boundary blocks 1 are installed side by side in the longitudinal direction.

  The upper surface of the boundary block 1 has a first top surface 40 on the first side surface 10 side and a second top surface 50 on the second side surface 20 side, which are connected by an intermediate surface 60. In the present embodiment, the first top surface 40 is higher than the second top surface 50. The pavement structure in contact with the first side surface 10 is formed to have a height indicated by an arrow a in the drawing (that is, substantially the same height as the first top surface 40). On the other hand, the pavement structure in contact with the second side surface 20 is formed to have a height indicated by an arrow b in the drawing (that is, approximately the same height as the second top surface 50).

  On the first side surface 10, a step surface 70 is provided that faces upward when the boundary block 1 is installed. FIG. 1D is an enlarged cross-sectional view illustrating a region ID in FIG. As shown in FIGS. 1C and 1D, the first side surface 10 includes an upper side surface portion 11 having a demolding gradient of the boundary block on a side surface portion extending downward from the vicinity of the upper end portion thereof, and the first side surface 10. It has a lower side surface portion 12 that is a side surface portion extending upward from the vicinity of the lower end. In the installation posture of the boundary block 1, the stepped surface 70 is a first substantially horizontal portion 71 extending in a substantially horizontal direction from the lower end portion of the upper side surface portion 11, and a side of the first substantially horizontal portion 71 opposite to the upper side surface portion 11. A slope portion 72 extending obliquely upward from the end of the first portion, a second portion extending from the end of the slope portion 72 opposite to the first substantially horizontal portion 71 in the substantially horizontal direction, and connected to the upper end portion of the lower side surface portion 12. 2 and a substantially horizontal portion 73.

  With such a configuration, even if a gap is generated between the pavement structure and the upper side surface portion 11, weed seeds, rainwater, and the like enter the gap, and roots are generated from the seed, and the root is the upper side surface portion. 11, the slope portion 72 rises obliquely upward from the boundary with the first substantially horizontal portion 71, so that the roots extend upward from the boundary. As a result, the growth of weeds can be effectively suppressed and the roots, and thus the weeds can be killed. That is, the herbicidal effect can be suitably exhibited. In addition, since the stepped surface 70 does not have an acute angle portion, a pointed head, or a convex portion, it is possible to suppress the occurrence of a defect, and it is clearly easy to manufacture.

  In the installation posture of the boundary block 1, the angle formed by the inclined surface portion 72 with respect to the vertical direction (the angle represented by θ in FIG. 1D) is within the range of 2 degrees to 75 degrees, so that it can be removed from the formwork in the manufacturing process. Since it is easy to extract, the production is relatively easy, and the herbicidal effect can be suitably exhibited after installation.

(Second Embodiment)
FIG. 2 shows a boundary block 101 according to the second embodiment of the present invention. 2A is a cross-sectional view of the boundary block 101, and FIG. 2B is an enlarged cross-sectional view of a region IIB in FIG. 2A.
The second embodiment is different from the first embodiment in that the step surface 70 is formed at a lower position on the first side surface 10. In the boundary block 101 of the second embodiment, the pavement structure on the first side surface 10 side is formed to have a height indicated by an arrow c in the drawing (that is, a height slightly above the step surface 70). Is done.

(Modification)
In each of the above embodiments, the stepped surface 70 is provided only on one side surface (that is, the first side surface 10) of the boundary blocks 1 and 101, but both side surfaces (that is, the first and second side surfaces 10 and 20). ) May be provided with a stepped surface 70.
In each of the above embodiments, the upper surfaces of the boundary blocks 1 and 101 have the first top surface 40 and the second top surface 50, and these are connected by the intermediate surface 60. However, these configurations are not indispensable, and for example, the upper surfaces of the boundary blocks 1 and 101 can have any shape as necessary, such as a single plane. In addition, an arbitrary shape can be adopted within a range where the present invention can be implemented, such as a shape in which the entire shape of the boundary blocks 1 and 101 is curved in the horizontal direction.

In the above description, the block according to the present invention has been described as a boundary block. However, the present invention is not limited to this, and can be implemented as other structures such as a side groove block, a retaining wall block, a box culvert, and the like. is there.
For example, FIG. 3 is a schematic view showing an example in which the present invention is applied to the side groove block 201 as one modification of the above-described embodiments of the present invention. 3A is a cross-sectional view, and FIG. 3B is an enlarged cross-sectional view illustrating a region IIIB in FIG. 3A.
FIG. 4 is a schematic view showing an example in which the present invention is applied to the retaining wall block 301 as another modification of the above-described embodiments of the present invention. FIG. 4A is a cross-sectional view in a state where the retaining wall block 301 is installed, and FIG. 4B is an enlarged cross-sectional view illustrating an area IVB in FIG. 4A. As shown in the figure, the retaining wall block 301 in FIG. 4 is configured to be stacked in a substantially vertical direction.
FIG. 5 is a schematic diagram showing an example in which the present invention is applied to a retaining wall block 401 as still another modification of the above-described embodiments of the present invention. FIG. 5A is a cross-sectional view in the installed state, and FIG. 5B is an enlarged cross-sectional view showing a region VB in FIG. 5A in an enlarged manner. As illustrated, the retaining wall block 401 in FIG. 5 is configured to be stacked obliquely with respect to the vertical direction.
Each of the blocks 201, 301, 401 according to these modified examples includes a stepped surface 70 having the same configuration as that of each of the above embodiments. Therefore, the blocks 201, 301, and 401 according to these modified examples can also exhibit the excellent herbicidal effect of the present invention as described above.

DESCRIPTION OF SYMBOLS 1,101 Boundary block 10 1st side surface 11 Upper side surface part 12 Lower side surface part 70 Step surface 71 1st substantially horizontal part 72 Slope part 73 2nd substantially horizontal part 201 Side groove block 301,401 Retaining wall block

Claims (3)

Block,
Having at least one side surface that functions as an abutment surface for the pavement structure;
The side surface is an upper side surface portion that is a side surface portion that extends downward from the vicinity of the upper end portion of the side surface in the installation posture of the block, and a lower side surface portion that is a side surface portion that extends upward from the vicinity of the lower end portion of the side surface in the installation posture. And
The side surface is provided with a step surface facing upward in the installation posture,
In the installation posture, the step surface includes a first substantially horizontal portion extending in a substantially horizontal direction from a lower end portion of the upper side surface portion, and an end portion of the first substantially horizontal portion opposite to the upper side surface portion. A slope portion extending obliquely upward, and a second substantially horizontal portion extending in a substantially horizontal direction from an end of the slope portion opposite to the first substantially horizontal portion and connected to an upper end portion of the lower side surface portion; A block characterized by comprising.   The block according to claim 1, wherein the upper side surface portion has a slope in the installation posture of the block.   3. The block according to claim 1, wherein an angle formed by the slope portion with respect to a vertical direction in the installation posture is in a range of 2 degrees to 75 degrees.

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