Anchor block for sheet laying

Abstract

To provide an anchor block for sheet laying which facilitates embedding into the ground and can flexibly cope with positional deviation in front-rear and right-left directions and an upper direction.SOLUTION: An anchor block for sheet laying is an anchor block which is used for fixing a laying object sheet to a ground surface and is made of cement mortar or concrete, wherein a plurality of projections which project downward and are tapered toward a lower side are provided on a block lower surface, and the projections have a front inclined part and a rear inclined part for preventing positional deviation in front-rear directions of the block, and a left inclined surface part and a right inclined surface part for preventing positional deviation in right-left directions of the block.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an anchor block used to fix sheets such as weed control sheets, dust control sheets, waterproof sheets, waterproof sheets, artificial turf sheets, etc., when laying the sheets on the ground. [Background technology]

[0002] Conventionally, when laying a sheet on the ground, the main method used is to drive metal stakes called anchor pins into the ground from above the sheet to be laid, and to secure the sheet to the ground by holding the sheet between the head of the anchor pin and the ground.

[0003] While laying a sheet using such anchor pins can be easily done by simply driving the anchor pins into the desired locations of the installation site, for example, when the installation site is near train tracks or substations, electric cables are often buried, and there is a risk of damaging the electric cables when the anchor pins are driven in. Damaging the electric cables once could lead to a serious accident.

[0004] Therefore, as shown in Patent Document 1 below, a method has been developed in which, instead of anchor pins, a plurality of anchor blocks are buried in desired locations in the installation area to install the sheet. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3204379 Summary of the Invention [Problem to be solved by the invention]

[0006] If the sheet is laid using the anchor blocks of Patent Document 1, no anchor pins are used, and so naturally there is no risk of damaging the buried cable at the laying site.

[0007] However, the anchor block in Patent Document 1 is rectangular (Patent Document 1: paragraph

[0017] ), and adjusting the anchor block so that its top surface is flush with the ground requires complicated burying work.

[0008] Furthermore, the anchor block in Patent Document 1 has vertical sides over the entire thickness of the block, and therefore has the problem that if the block floats due to wind pressure, earthquakes, frost heave, or the like, and there is even a slight misalignment in the front-to-back or left-to-right direction, it will be difficult to return to its original buried position. [Means for solving the problem]

[0009] The present invention provides an anchor block for laying a sheet, which can be easily buried in the ground and can flexibly accommodate positional deviations in the front-back, left-right, and upward directions.

[0010] In brief, the anchor block for laying sheets of the present invention (hereinafter simply referred to as "anchor block") is an anchor block made of cement mortar or concrete used to fix the sheet to be laid to the ground, and has a number of protrusions on the underside of the block that protrude downward and taper as they go downward, and the protrusions have front and rear slopes which prevent the block from shifting in position in the fore-aft direction, as well as left and right slopes which prevent the block from shifting in position in the left-right direction, making it easy to bury in the ground and enabling it to appropriately accommodate shifts in the fore-aft, left-right and upward (floating) directions.

[0011] Preferably, the front, rear, left and right slopes of the protrusion are configured to have a triangular shape that gradually becomes narrower as it extends downward, and by making the protrusion a so-called pyramid shape, this facilitates the embedding operation and makes it easier to absorb positional misalignment.

[0012] Alternatively, the front and rear inclined surfaces of the protrusion may be trapezoidal in shape and gradually narrower in width as they extend downward, and the left and right inclined surfaces of the protrusion may be triangular in shape and gradually narrower in width as they extend downward, making the embedding operation easier and providing better prevention of misalignment, especially in the front-to-back direction.

[0013] Furthermore, the angle of inclination of the rear inclined surface of the protrusion is configured to be larger than the angle of inclination of the front inclined surface of the protrusion, thereby making it possible to more effectively prevent rearward displacement.

[0014] In addition, by providing a recess in the rear slope, it is possible to complement the prevention of the positional deviation in the downward direction. Preferably, the recess in the rear slope is formed in a triangular shape that gradually narrows in width as it extends downward, thereby reliably complementing the prevention of the positional deviation in the backward direction.

[0015] Furthermore, by providing crack inducing joints between adjacent protruding portions, even if the ground is deformed due to an earthquake or the like, it is possible to accommodate such deformation. Effect of the Invention

[0016] According to the anchor block of the present invention, the protrusion having four inclined surfaces makes it easy to embed the anchor in the ground and can appropriately accommodate positional deviations in the front-back, left-right, and upward directions. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a bottom view of the anchor block of the first embodiment. [Diagram 2] FIG. 2 is a side view of the anchor block of the first embodiment. [Diagram 3] FIG. 11 is a bottom view of the anchor block of the second embodiment. [Figure 4] FIG. 11 is a side view of the anchor block of the second embodiment. [Diagram 5]1 is a cross-sectional view showing a state in which a sheet is laid using anchor blocks buried in ground having flat ground. FIG. [Figure 6] FIG. 1 is a cross-sectional view showing a state in which a sheet is laid using anchor blocks buried in ground having a sloping surface. [Figure 7] FIG. 1 is a perspective view showing a state in which a sheet is laid using the anchor block according to the present invention. [Figure 8] An enlarged cross-sectional view showing the state in which the crack inducing joint portion has cracked. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The best mode of the anchor block 1 according to the present invention will be described with reference to Fig. 1 to Fig. 8. Fig. 1, Fig. 2 and Fig. 5 show an anchor block 1' according to a first embodiment, and Fig. 3, Fig. 4 and Fig. 6 show an anchor block 1'' according to a second embodiment.

[0019] The anchor block 1 according to the present invention is used when laying a sheet S, such as a weed control sheet, on the ground Ga-Gb, as shown in Fig. 7. In the figure, Ga indicates a flat ground surface, and Gb indicates an inclined ground surface.

[0020] Furthermore, the anchor blocks 1 according to the present invention are buried at multiple spaced locations so that the block upper surfaces 1a are flush with the ground surface Ga-Gb, and the block upper surfaces 1a are used to partially fix the sheet S to be laid. Therefore, by partially fixing the sheet S with multiple anchor blocks 1, the entire sheet S can be stably laid.

[0021] Known fixing means can be used for partially fixing the sheet S to the block top surface 1a described above. For example, a urethane resin-based, silicone resin-based adhesive or the like can be applied to the block top surface 1a, and the sheet S can be directly attached and fixed to the block top surface 1a. Alternatively, although not specifically shown, a threaded bolt hole can be drilled in the block top surface 1a, and a bolt can be screwed into the bolt hole, thereby sandwiching and fixing the sheet S between the back surface of the bolt head and the block top surface 1a.

[0022] <Basic configuration> The anchor block 1 of the present invention has a basic configuration, as shown in Figures 1 to 4, of a square, flat block upper surface 1a, a plurality of protrusions 2 protruding downward on the block lower surface 1b and tapering downward, and a block side surface 1c that is shorter by the height of the protrusions 2.

[0023] Such a basic configuration, particularly the configuration with multiple protrusions 2, makes it easy to bury the block in the ground G. Also, the block side 1c is shorter by the height of the protrusions 2, so that if the block floats due to wind pressure, earthquakes, frost heave, or the like, that is, if the anchor block 1 shifts upward (in the direction in which the buried state is released), it is unlikely to be hindered from automatically returning to the buried position. Furthermore, as shown in Figures 2 and 4, if the block side 1c is made to have an inwardly sloping surface, the burying operation can be facilitated and the block can be returned to the buried position more efficiently.

[0024] In addition, in the anchor block 1 of the present invention, the arrangement or number of the multiple protrusions 2 is not particularly limited, but from the viewpoint of molding and functionality, it is preferable to arrange the protrusions 2 in at least two rows in a horizontal line, as shown in Figures 1 and 3.

[0025] Known cement mortar or known concrete is used as the material, and these materials are formed using a formwork to manufacture the anchor block 1. Note that due to the formwork forming, corners are often chamfered. Therefore, in this document, even if the top (lower end) of the protrusion 2 has a chamfered portion R and is not strictly speaking sharp, it will be described as being sharp. For example, the shape of the protrusion 2 shown in Figures 1 and 2 will be described as a square protrusion, not a truncated square protrusion.

[0026] In the anchor block 1 according to the present invention, preferably, crack inducing joints 3 consisting of bottomed grooves are provided in a lattice pattern on the underside 1b of the block, the crack inducing joints 3 are arranged between adjacent protrusions 2, and a metal or synthetic resin net 4 is embedded so as to back up the crack inducing joints 3. The net 4 reinforces the anchor block 1 itself, and as shown in Fig. 8, this is to prevent the anchor block 1 from falling apart even if cracks occur due to the crack inducing joints 3, while allowing it to adhere closely to the unevenness of the ground (surface of the ground G).

[0027] <Configuration of protrusion 2> As described above, the protrusion 2 of the anchor block 1 of the present invention protrudes downward from the lower surface 1b of the block and has a shape that tapers downward.

[0028] In addition, the protrusion 2 has four slopes that prevent displacement in each of the front, rear, left and right directions. That is, as shown in Figures 1 to 4, the protrusion 2 has a front slope 2a that prevents the anchor block 1 itself from displacing forward, a rear slope 2b that prevents the anchor block 1 itself from displacing backward, a left slope 2c that prevents the anchor block 1 itself from displacing leftward, and a right slope 2d that prevents the anchor block 1 itself from displacing rightward.

[0029] As already mentioned, Figs. 1, 2 and 5 show the anchor block 1' according to the first embodiment, and Figs. 3, 4 and 6 show the anchor block 1'' according to the second embodiment, but the difference between the first and second embodiments is the configuration of the protrusion 2. Next, the protrusion 2 in each embodiment will be described.

[0030] <Protrusion 2 in Example 1> In the anchor block 1'(1) of the first embodiment, as shown in Figures 1 and 2, the front slope 2a, the rear slope 2b, the left slope 2c, and the right slope 2d of the protrusion 2 are configured to have a triangular shape that gradually narrows toward the bottom. In other words, the protrusion 2 can be made pyramidal, and the position and height of the apex can be freely adjusted, but it is preferably a square, and more preferably a regular square.

[0031] By making the protrusion 2 into a quadrangular pyramid shape, the anchor block 1' can be effectively prevented from shifting in the four directions (front, back, left, and right) and can be easily buried in the ground G. Even if the anchor block 1' is shifted upward, it can easily return to the buried position. The crack inducing joint 3 described above can be easily functioned. In particular, the anchor block 1' of the first embodiment can be effectively prevented from shifting and facilitated in the burying work by being buried flush with the flat ground Ga as shown in Figs. 5 and 7. Furthermore, it does not damage the cable C, such as the power cable, buried in the ground G.

[0032] <<Protrusion 2 in Example 2>> In the anchor block 1''(1) of the second embodiment, as shown in Figures 3 and 4, of the multiple protrusions 2 arranged in two rows, the front slope 2a and rear slope 2b of the protrusion 2 in the first row from the front have a trapezoidal shape that gradually becomes narrower as it goes downward, and the left slope 2c and right slope 2d of the same protrusion 2 have a triangular shape that gradually becomes narrower as it goes downward. In other words, the front slope 2a, rear slope 2b, left slope 2c and right slope 2d are combined in a shape like a hipped roof, and misalignment, especially in the front-to-rear direction, is strongly prevented by the trapezoidal front slope 2a and rear slope 2b.

[0033] Therefore, as shown in Figures 6 and 7, the anchor block 1'' of Example 2 can effectively prevent displacement in the front-to-rear direction, particularly when buried so as to be flush with the sloping ground Gb. Naturally, it will not damage cables C, such as power cables, buried in the ground G. Note that, in this example, the second row of protrusions 2 has been described as having the same pyramidal shape as the protrusions 2 of Example 1, but this is not limiting, and it is also possible for the second row of protrusions 2 to have the same hipped roof shape as the first row.

[0034] Preferably, the inclination angle θ1 of the rear inclined surface portion 2b is made larger than the inclination angle θ2 of the front inclined surface portion 2a, thereby strengthening the engagement of the rear inclined surface portion 2b with the ground G and improving the effect of preventing displacement in the rear direction, that is, the effect of preventing displacement in the downward direction of the inclined ground surface Gb.

[0035] More preferably, by providing a recess 5 in the rear slope portion 2b, the engagement of the rear slope portion 2b with the ground G can be further strengthened. There is no particular limitation on the shape of the recess 5, but if the recess 5 is formed into a triangular recess that gradually becomes narrower toward the bottom, the engagement with the ground G can be effectively strengthened.

[0036] As described above, according to the anchor block 1 of the present invention, the protrusion 2 having the four sloped portions 2a, 2b, 2c, and 2d makes it easy to embed the anchor block in the ground G and can properly accommodate positional deviations in the front-back, left-right, and upward directions. Note that in the present invention, the shape of the protrusion 2 is not limited as long as it has the four sloped portions 2a, 2b, 2c, and 2d.

[0037] Furthermore, the anchor block 1 according to the present invention can strongly engage with the ground G by changing the inclination angle and shape of the rear slope 2d of the protrusion 2. If the rear slope 2b, which has a stronger engagement force, is used in the direction in which it is most important to prevent displacement, displacement can be effectively prevented. In the above description of each embodiment, the inclination angle of the rear slope 2b is changed and the rear slope 2b is provided with a recess 5 in the hipped protrusion 2, but in the present invention, the inclination angle and shape of the rear slope 2d can also be changed in the pyramidal protrusion 2 according to the implementation.

[0038] Furthermore, the anchor block 1 according to the present invention can also accommodate deformation of the ground G due to the crack inducing joints 3. [Explanation of symbols]

[0039] 1 ... anchor block, 1a ... block upper surface, 1b ... block lower surface, 1c ... block side surface, 1' ... anchor block according to the first embodiment, 1'' ... anchor block according to the second embodiment, 2 ... protrusion, 2a ... front slope portion, 2b ... rear slope portion, 2c ... left slope portion, 2d ... right slope portion, 3...crack induction joint, 4...net, 5...recess, R...chamfered portion, θ1...inclination angle of rear slope, θ2...inclination angle of front slope, G...ground, Ga...flat ground, Gb...sloping ground, C...cable, S...sheet.

Claims

1. An anchor block for laying sheets, which is made of cement mortar or concrete and is used to fix the sheet to be laid on the ground, characterized in that the underside of the block has a number of protrusions that protrude downward and taper as they go downward, and the protrusions have front and rear sloping portions to prevent the block from shifting out of position in the forward / backward direction, as well as left and right sloping portions to prevent the block from shifting out of position in the left / right direction.

2. 2. The anchor block for laying sheets according to claim 1, wherein the front inclined surface, the rear inclined surface, the left inclined surface and the right inclined surface of the protrusion have a triangular shape that gradually becomes narrower as it extends downward.

3. 2. The anchor block for laying sheets as described in claim 1, characterized in that the front and rear inclined surfaces of the protrusion have a trapezoidal shape that gradually becomes narrower as it extends downward, and the left and right inclined surfaces of the protrusion have a triangular shape that gradually becomes narrower as it extends downward.

4. 4. The anchor block for laying sheets according to claim 1, wherein an inclination angle of the rear inclined surface of the protrusion is larger than an inclination angle of the front inclined surface of the protrusion.

5. 4. The anchor block for laying sheets according to claim 1, wherein a recess is provided in the rear inclined surface of the protrusion.

6. 6. The anchor block for laying sheets according to claim 5, wherein the recessed portion of the rear slope of the projection is recessed in a triangular shape that gradually narrows downward.

7. 2. The anchor block for laying sheets according to claim 1, characterized in that a crack inducing joint is provided between adjacent said protruding portions.

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