Boundary marker stake

Abstract

To provide a boundary marker stake that includes a convergence part formed at a tip portion of the stake so as to enable cutting, allows the length of the stake to be shortened by cutting the stake along the convergence part, and is usable even when a soil layer is shallow.SOLUTION: A boundary marker stake includes: a leg body 1 embedded in the ground: and a head body 2 exposed above the ground to indicate a boundary point or a survey point, the leg body having a convergence part 6 formed at a predetermined region so that the outer shape gradually decreases toward a forward side, the convergence part 6 having a reinforcing rib 7 to provide a structure that becomes easy to break in a specific direction alone, the length of the stake being made adjustable by cutting the leg body along the convergence part 6.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a boundary stake that is driven into the ground at a boundary such as a boundary between property or land. [Background technology]

[0002] Generally, when conducting cadastral surveys to investigate land boundaries, area, etc., especially in mountain villages, the surveying is carried out using aerial laser surveying, or so-called remote sensing technology. After surveying the vast mountainous area, boundary posts are installed to clearly define the boundaries of the land (plot boundaries). The technologies disclosed in Patent Documents 1 and 2 are known as technologies relating to such boundary posts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7360661 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-78427 Summary of the Invention [Problem to be solved by the invention]

[0004] The aforementioned Patent Document 1 relates to a technology that ensures strength while reducing weight and improving workability, while Patent Document 2 relates to boundary stakes that display various information according to the state of land boundaries. When installing boundary stakes in mountain village surveys, the soil layer may be shallow due to the presence of rocks, bedrock, etc., and the stakes may not be driven deep enough. When the soil layer is shallow, the techniques of Patent Documents 1 and 2 have the problem that the piles cannot be driven sufficiently. In such situations where it is not possible to drive piles into the ground, it is possible to shorten the piles by cutting off their tips, but this is a manual process in mountainous areas, which is time-consuming and requires considerable effort. The present invention has been made to solve the above-mentioned problems of the conventional method, and its purpose is to provide a boundary post that has a converging portion at the tip of the boundary post that can be cut off, and by cutting along the converging portion, the length of the post can be shortened, making it usable even when the soil layer is shallow. [Means for solving the problem]

[0005] As a means to achieve the above-mentioned purpose, the boundary post described in claim 1 is characterized in that it has a leg body that is buried in the ground and a head body that is exposed above ground and represents a boundary point or a survey point, and that a converging section whose outer shape gradually becomes smaller toward the tip is formed at a predetermined position of the leg body, and the leg body can be cut along the converging section, thereby making it possible to shorten the length of the post.

[0006] The boundary stake described in claim 2 is the boundary stake described in claim 1, but the legs are made of resin and a reinforcing rib is formed at the converging portion, making it prone to breaking only in a specific direction.

[0007] The boundary stake described in claim 3 is the boundary stake described in claim 1 or 2, and can be cut by grasping both sides of the converging portion with one hand and bending it.

[0008] The boundary post according to claim 4 is characterized in that, in the boundary post according to claim 3, a groove is formed in the leg body, which has the effect of preventing the leg body from slipping out of the buried soil.

[0009] The boundary post described in claim 5 is characterized in that, in the boundary post described in claim 4, the leg has the outer shape of a rectangular pillar, has a columnar surface with a groove formed thereon and a flat columnar surface, and the inner and outer surfaces in the bending direction are flat columnar surfaces. [Effects of the Invention]

[0010] In the boundary pile described in claim 1, a converging section whose outer shape gradually becomes smaller toward the tip is formed at a predetermined position of the leg body, and the length of the pile can be shortened by cutting the leg body along that converging section.Therefore, if there are rocks, bedrock layers, etc. in the ground and the boundary pile cannot be driven deep, the leg body can be shortened and driven in.

[0011] In the boundary post described in claim 2, the legs are made of resin, which makes it easy to mold them into an integrated structure. Furthermore, a reinforcing rib is formed at the converging portion, making it easy to break only in a specific direction, thereby ensuring the strength of the leg body and realizing ease of breaking.

[0012] The boundary post described in claim 3 can be cut by grasping both sides of the converging part with your hands and bending it, so it can be easily cut even when working in mountainous areas without using tools.

[0013] In the boundary post described in claim 4, grooves are formed in the legs, so that the installed boundary post is firmly supported on the ground.

[0014] In the boundary post described in claim 5, the leg has the outer shape of a rectangular pillar, with a columnar surface having a groove formed thereon and a flat columnar surface, so that the bending direction or bending location can be intuitively recognized by visual inspection. The inner and outer surfaces in the bending direction are flat cylindrical surfaces, so when the legs are gripped with the palm of the hand during bending, the flat surfaces come into contact with the palm, ensuring a wide contact area, making it easy to apply hand force and effectively transmitting the bending force. [Brief explanation of the drawings]

[0015] [Figure 1] This is a front view of the boundary post. [Figure 2] FIG. 1 is a side view of a boundary post. [Figure 3] This is a plan view of the boundary post. [Figure 4] This is a bottom view of the boundary post. [Figure 5] This is an oblique view of the boundary post from below. [Figure 6] This is an oblique view of the boundary post from above. [Figure 7] AA cross-sectional view. [Figure 8] This is an enlarged view of the BB portion. [Figure 9] This is an enlarged view of the CC portion. [Figure 10] FIG. [Figure 11] 10(a) is a front view of the boundary stake according to the second embodiment, and (b) is a side view of the boundary stake according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0016] As shown in Figs. 1 to 10, the boundary stake according to the first embodiment of the present invention comprises a leg 1 buried in the ground and a head 2 exposed above ground to indicate a boundary point. The material and color of the boundary post itself are not particularly limited, but as an example, the material is made of resin and the color is formed in pink, red, etc., which makes it easy to find. The head 2 is a disk-shaped unit several centimeters thick, with a cross engraved on the top surface. When installed, a plate or the like can be attached to the top surface of the head to display various information, as needed.

[0017] The leg 1 is a rod-like body extending downward from the upper end of a disk, and has a rectangular (quadratic) outer shape. The four side surfaces (columnar surfaces) of the leg body each have the same width, and include a columnar surface 3 with grooves formed therein and a flat columnar surface 4 without grooves. The cylindrical surfaces 3 with grooves and the flat cylindrical surfaces 4 without grooves are alternately adjacent to each other, and the cylindrical surfaces located on the front and back sides have the same shape. The tip 5 of the leg is a square pillar with four faces inclined inward at equal angles to form a sharp point.

[0018] A converging portion 6 is formed on the distal side of the intermediate portion of the leg body. This converging portion 6 is a narrow, constricted portion of the outer shape of the main body, and its shape is such that all four sides of the main body are inclined inward at equal angles to gradually narrow the diameter, with the narrowest portion being about 1 / 3 the thickness of the main body. After shrinking to its smallest size, it turns back, gradually slopes outward and thickens, returning to the same shape and thickness as the base of the leg, and the tip of the same outer shape becomes a pointed tip 5.

[0019] The converging portion 6 is provided with a reinforcing rib 7 for ensuring strength. The reinforcing rib 7 has a shape in which both sides of the convergent portion 6 of the flat cylindrical surface 4 are thinly widened, giving the flat cylindrical surface 4 a triangular shape when viewed from the front (see FIG. 8). When the reinforcing rib 7 is viewed from the cylindrical surface on which the groove is formed, it has a shape in which vertical stripes protrude through the thinnest part. In this embodiment, reinforcing ribs 7 are formed, so that the converging portion 6 can be cut by pinching both sides with hands and bending them. The flat cylindrical surface 4 is easily broken when facing inward, but is less likely to break when facing inward from the grooved cylindrical surface 3. That is, by placing the flat cylindrical surfaces 4 on the inner and outer corner sides in the bending direction, bending stress is concentrated on the thinner plate thickness parts, making them more likely to break. On the other hand, if the grooved columnar surface 3 is located on the inner or outer corner side in the bending direction, stress will be concentrated in the thick plate part of the converging part, making it less likely to break.

[0020] The groove is formed by cutting the columnar surface of the leg body to form unevenness, forming a depressed surface on the columnar surface of the leg body, passing a convex vertical bar 8 in the vertical direction in the center of the leg body, and forming a curved V-shaped groove 9 with V-shaped pieces that slope downward from both the left and right edges of the column toward the center. A plurality of V-shaped grooves 9 are provided at predetermined intervals in the vertical direction of the leg body. This V-shaped groove 9 eliminates frictional resistance with the soil in the direction in which the legs are driven in, but generates frictional resistance with the soil in the direction in which the legs are pulled out.

[0021] Next, a method for using the boundary stake of the present invention will be described. In cadastral surveys to investigate the boundaries and areas of land in mountain villages, surveys are conducted using aerial laser surveying, a technology known as remote sensing. After surveying the vast mountainous area, boundary stakes are installed to clearly define the boundaries of the land (plot boundaries). When installing boundary posts, the head of the post is struck with a hammer, the legs are driven into the soil layer, the head is exposed, and various information is displayed on the head.

[0022] Depending on the location where the boundary stake is to be installed, there may be rocks or bedrock layers in the soil, making it impossible to drive the stake deep enough. In the past, the tip of a boundary post was cut using tools, etc., but in this invention, the converging part of the boundary post is bent, so the tip of the post is cut off and shortened, and by using this shortened boundary post, it can be installed underground while avoiding collision with rocks or bedrock layers. When cutting, the rod-shaped portion is pinched at the narrowed converging portion 6 by grasping both sides with one hand and bending it, causing stress (bending force) to be concentrated at the narrowed portion, causing it to break with a snap (see Figure 10).

[0023] When bending, depending on the arrangement of the reinforcing ribs 7, if the flat columnar surface 4 is placed in front (inside), it is easy to break, but if the grooved columnar surface 3 is placed in front (inside), it is difficult to break. The leg 1 has the outer shape of a square pillar, with a grooved cylindrical surface 3 and a flat cylindrical surface 4, and the inner and outer surfaces in the bending direction are made flat cylindrical surfaces 4, so that the base and pad of the thumb mainly come into contact with the inner surface in the bending direction, and the inner surfaces of the four fingers come into inscribed contact with the outer surface in the bending direction. The contact area between the inside of the hand and the leg 1 is not a groove (unevenness) but a flat surface, so that the force of the hand can be easily applied and the bending force can be transmitted effectively. By cutting the converging portion 6, the narrow, constricted portion is cut off, so that the tip of the boundary post after cutting is also made sharp, and the sharp tip can be used for driving. [Example]

[0024] Next, a boundary post according to a second embodiment will be described. As shown in Figs. 11(a) and (b), the boundary post according to the second embodiment has a configuration in which reinforcing ribs at the converging portion are formed on each of the four faces of a square pillar. The shape of the reinforcing rib can be set depending on the material, size, strength, or usage situation and location of the boundary stake. In the boundary stake of this embodiment, the direction in which it is easy to break and the direction in which it is difficult to break are determined by the shape of the reinforcing rib at the converging portion.

[0025] Although an embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and the present invention also includes changes in settings and the like within the scope of the gist of the invention. In the above embodiment, the boundary stakes are made of resin, but the present invention also includes stakes made of metal, concrete, or a mixture of these. In the above embodiment, the converging portion is formed at one location on the leg, but it is also possible to provide this converging portion at a plurality of locations depending on the length of the leg. The reinforcing ribs described in the above embodiments may have other shapes and materials, and any configuration that allows them to be easily broken only in a specific direction is included in the present invention. In the above embodiment, the outer shape of the legs is a square prism, but the present invention also includes cases where the legs are cylindrical. [Explanation of symbols]

[0026] 1 leg body 2 head body 3. Grooved cylindrical surface 4 Flat cylinder surface 5 Tip 6 Convergence section 7 Reinforcing rib 8 Vertical Stripes 9 V-groove

Claims

1. A boundary stake with a base buried in the ground and a head exposed above ground to indicate a boundary point or a survey point. This boundary post is characterized in that a converging section whose outer shape gradually becomes smaller toward the tip is formed at a predetermined position of the leg body, and the length of the post can be shortened by cutting the leg body along the converging section.

2. 2. The boundary post according to claim 1, wherein the legs are made of resin and a reinforcing rib is formed at the converging portion, so that the post is easily broken only in a specific direction.

3. 3. The boundary post according to claim 1 or 2, which can be cut by grasping both sides of the converging portion with hands and bending them.

4. 4. The boundary post according to claim 3, wherein a groove is formed in the leg body to prevent it from slipping out of the buried soil.

5. The boundary post described in claim 4, characterized in that the leg has the outer shape of a rectangular pillar, has a cylindrical surface with a groove formed therein and a flat cylindrical surface, and the inner and outer surfaces in the bending direction are flat cylindrical surfaces.

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