Marking post

Abstract

To provide a sign post capable of attaching a sign member to a post member without using an attachment member such as a screw and also capable of reducing time and labor for construction.SOLUTION: A sign post 1 includes: a post member 10 whose lower end is embedded underground; and a sign member 20 attached to an upper end surface or a side surface of the post member 10. A magnetic part 22 is provided in the sign member 20. A non-magnetic part 13 is arranged in the post member 10. The magnetic part 22 and the non-magnetic part 13 are magnetically attached each other so as to allow the sign member 20 to be attached to the post member 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a marking stake comprising a stake member and a marking member. [Background technology]

[0002] Stakes are driven into the ground and are used as markers to indicate land boundaries, surveying reference points, and so on. Such stakes are marked with information necessary for managing them, such as their identification number. These types of stakes may also be marked with directional symbols such as arrows or cross marks. These directional symbols allow the more precise location of land boundaries, surveying reference points, and so on to be ascertained. Stakes marked with information such as identification numbers and directional symbols (pile-related information) are generally called marker stakes.

[0003] There is a type of marking pile in which a marking member on which pile-related information is marked is attached to a pile member. For example, Patent Document 1 describes this type of marking pile. The marking pile of Patent Document 1 has a structure in which a marking member (display plate 20 in the same document) is attached to a pile member (pile body 1 and cap 12 in the same document) using a screw or the like (fastening member 15 in FIG. 2 in the same document). Specifically, the marking member is attached to the pile member by threading a screw or the like through screw holes (insertion hole 21 and insertion hole 13 in the same document) provided in the marking member and the pile member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-249508 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the marking pile of Patent Document 1, in order to attach the marking member to the pile member, it was necessary to push a screw or the like into the screw hole. This required a lot of work to attach the marking member. There was also a risk of losing the screws or the like necessary to attach the marking member. Furthermore, it was necessary to layout the marking in consideration of the positions of the screws or the like and the screw holes through which they were inserted. In addition, if metal such as iron was used for the screws or the like, there was a risk that the rust (corrosion) would spread to the outer surface of the marking member, making the marking difficult to see.

[0006] The present invention has been made to solve the above problems, and provides a marking stake that can attach a marking member to a stake member without using an attachment member such as a screw, thereby reducing the labor required for construction. Another object of the present invention is to provide a marking stake that can prevent the attachment member from being lost. Another object of the present invention is to provide a marking stake that allows a high degree of freedom in the layout of the markings. In addition, another object of the present invention is to provide a marking stake that is less likely to reduce the visibility of the markings. [Means for solving the problem]

[0007] The above issues are: A pile member having at least a lower end buried in the ground; A marking member attached to the top end surface or side surface of the stake member; A marking stake comprising: The marking member is provided with a magnetic portion, while the stake member is provided with a magnetically attracted portion, The magnetically attached portion and the magnetically attached portion are magnetically attached to each other, thereby attaching the marking member to the stake member. A marking pile characterized by This is solved by providing

[0008] In the marking pile of the present invention, the marking member is attached to the pile member by magnetically attaching the magnetically attached portion of the marking member to the magnetically attached portion of the pile member. Therefore, the marking member can be attached to the pile member without using mounting members such as screws. This reduces the labor required for constructing the marking pile. It is also possible to prevent the mounting members from being lost. Furthermore, it is no longer necessary to layout the markings while taking the mounting members, etc. into consideration. In addition, it is also possible to prevent a decrease in visibility of the markings due to corrosion of the mounting members, etc.

[0009] However, if the marking member and the stake member are merely magnetically attached, there is a risk that the marking member may be removed by tampering. For this reason, in the marking stake of the present invention, it is preferable that the marking member is fitted into a recess provided in the stake member. This makes it impossible to easily remove the marking member. It is also possible to prevent the marking member from shifting from its mounting position after mounting.

[0010] In the marking stake of the present invention, it is preferable that the outer surface of the marking member fitted into the recess and the outer surface of the stake member around the recess are substantially flush with each other. This makes it difficult to grasp the marking member, and makes it even more difficult to remove the marking member.

[0011] In the marking post of the present invention, it is preferable that the outer peripheral shape of the marking member is substantially the same as the inner wall shape of the recessed portion, so that there is almost no gap between the side surface of the marking member and the inner wall of the recessed portion, making it even more difficult to remove the marking member.

[0012] In recent years, the functionality of piles has been improved, and piles equipped with various electronic devices have been developed. When providing such an electronic device in the marking pile of the present invention, it is preferable to adopt the following configuration. That is, The pile member, A pile body, A cap is placed on the top of the pile body. The following shall be provided: The cap is provided with the magnetized portion, An electronic device is housed in the pile body; A member made of a magnetically-preventing material is disposed between the magnetically-adhered portion and the electronic device to magnetically protect the electronic device. Since electronic devices are prone to malfunction due to magnetism (magnetic fields or magnetic fields), the electronic device can be magnetically protected by disposing a member made of antimagnetic material between the magnetized part and the electronic device. Effect of the Invention

[0013] As described above, the present invention makes it possible to provide a marking stake that can attach a marking member to a stake member without using an attachment member, thereby reducing the labor required for construction. It also makes it possible to provide a marking stake that can prevent the attachment member from being lost. It also makes it possible to provide a marking stake that allows for a high degree of freedom in the layout of the marking. In addition, it makes it possible to provide a marking stake that is less likely to reduce the visibility of the marking. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view showing the construction of the marker pile of the first embodiment. [Diagram 2] 1 is an enlarged cross-sectional view showing the vicinity of the upper part of the marker pile of the first embodiment. FIG. [Diagram 3] FIG. 11 is a perspective view showing the construction of a marker pile according to a second embodiment. [Figure 4] FIG. 11 is a perspective view showing the construction of a marker pile according to a third embodiment. [Diagram 5] FIG. 11 is a perspective view showing a state in which a marker pile of the fourth embodiment is being constructed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The marking pile of the present invention will be described in more detail with reference to the drawings. However, the configuration described below is merely a preferred embodiment, and the technical scope of the marking pile of the present invention is not limited to the configuration described below. The marking pile of the present invention can be appropriately modified within the scope that does not impair the gist of the invention.

[0016] 1. First embodiment 1-1. How to use the marking posts Fig. 1 is a perspective view showing a state in which a marker stake 1 in a first embodiment is used. The marker stake 1 is driven into the ground and used as a mark for indicating land boundaries, reference points during surveying, and the like. This marker stake 1 mainly comprises a stake member 10 and a marker member 20. In addition, the marker stake 1 is provided with an electronic device 30 for enhancing the functionality of the marker stake 1.

[0017] The marking member 20 is for marking pile-related information such as an identification number, an indication symbol, etc. The marking member 20 includes a marking portion 21 on which pile-related information (not shown) is marked, and a magnetic portion 22 (here, a permanent magnet).

[0018] The pile member 10 is used with at least its lower end embedded in the ground. A recess 12a for fitting (accommodating) the marking member 20 is provided on the upper surface of the pile member 10, and a magnetized portion 13 is provided inside the recess 12a.

[0019] In the marking pile 1 of the first embodiment, the magnetically attached portion 22 is magnetically attached to the magnetized portion 13, so that the marking member 20 can be attached to the pile member 10 without using any attachment members such as screws. This reduces the effort required to attach the marking member 20. It also makes it possible to prevent the loss of attachment members such as screws. Furthermore, since attachment members are no longer necessary, the degree of freedom in the layout of the markings can be improved. In addition, the markings will not become difficult to see due to corrosion of the attachment members, etc.

[0020] The structure of the marker pile 1 will be explained in more detail below.

[0021] 1-2. Structure of marker posts 2 is an enlarged cross-sectional view showing the marking stake 1 with the marking member 20 attached to the stake member 10. In the marking stake 1 of the first embodiment, the stake member 10 is composed of a stake body 11 and a cap 12 placed thereon. In addition, a storage section 11a for storing an electronic device 30 is provided on the upper surface of the stake body 11, and a recess 12a for fitting the marking member 20 is provided on the upper surface of the cap 12.

[0022] A magnetized portion 13 is disposed inside the recess 12a. In the marker pile 1 of the first embodiment, the magnetized portion 13 is fixed to the bottom of the recess 12a. This magnetized portion 13 can also be provided at a location other than the bottom of the recess 12a (for example, the inner wall of the recess 12a). Furthermore, the method of fixing the magnetized portion 13 to the cap 12 is not particularly limited. For example, the magnetized portion 13 can be fixed to the cap 12 using a bolt, an adhesive, or the like. In the marker pile 1 of the first embodiment, the magnetized portion 13 is fixed with a bolt (not shown).

[0023] The thickness of the magnetized part 13 is not particularly limited. However, if the magnetized part 13 is too thin, the force of magnetization with the magnetized part 22 may be weakened. For this reason, it is preferable that the thickness of the magnetized part 13 is not too thin, and is preferably 0.5 mm or more, for example. It is more preferable that the thickness of the magnetized part 13 is 1 mm or more, and even more preferable that the thickness is 1.5 mm or more. On the other hand, if the magnetized part 13 is too thick, the cost becomes unnecessarily high. For this reason, it is preferable that the thickness of the magnetized part 13 is not too thick, and is preferably 5 mm or less, for example. It is more preferable that the thickness of the magnetized part 13 is 4 mm or less, and even more preferable that the thickness is 3 mm or less.

[0024] The magnetized portion 13 and the magnetized portion 22 are formed of materials that are magnetically attracted to each other. A typical member used for magnetization is a permanent magnet. By forming both the magnetized portion 13 and the magnetized portion 22 from a permanent magnet, they can be strongly magnetized. Also, one of the magnetized portion 13 and the magnetized portion 22 can be a permanent magnet, and the other can be a member that easily sticks to a permanent magnet (hereinafter, sometimes referred to as a "magnetic attracting member"). In particular, it is preferable that the magnetized portion 13 is a magnetic attracting member rather than a permanent magnet. This is because, if the magnetized portion 13 is a permanent magnet, there is a concern that a foreign object other than the marking member 20, such as an iron piece, may enter the recess 12a and be magnetically attracted to the magnetized portion 13. If the magnetized portion 13 is a magnetic attracting member, it is possible to magnetically attract the magnetized portion 22 (permanent magnet) while preventing it from being magnetically attracted to a foreign object (limited to those that are not magnetized).

[0025] The permanent magnet is not particularly limited as long as it generates magnetism, and for example, an alnico magnet, a ferrite magnet, a neodymium magnet, etc. can be used. In the marking stake 1 of the first embodiment, the magnetically attached portion 22 is a ferrite magnet. The magnetization direction of the magnetically attached portion 22 (permanent magnet) is not particularly limited, and it may be magnetized in the thickness direction (for example, the N pole may appear at the interface with the marking portion 21 and the S pole may appear on the opposite surface), or it may be magnetized in the surface direction (for example, the N pole may appear on the left side of FIG. 2 and the S pole may appear on the right side).

[0026] The magnetic attraction member may be, for example, a material with a mass magnetic susceptibility of 30×10 -6 ~300×10 9 cm 3 / g can be used. Specifically, chromium (approximately 3.5 × 10 -6 cm 3 / g) and manganese (approximately 9.2 × 10 -6 cm 3 / g) are examples of materials that are more preferable as the magnetic attraction member. Materials with a higher mass magnetic susceptibility are, for example, iron (approximately 220×10 9 cm 3 / g) can be used. In addition to iron, other suitable materials include ferromagnetic materials (alloys containing these materials) such as nickel and cobalt. In the marking stake 1 of the first embodiment, the magnetized portion 13 is made of iron.

[0027] In addition, it is preferable that the magnetically attracted portion 22 and the magnetically attracted portion 13 contact each other over a larger area. This allows the marking member 20 and the stake member 10 (cap 12) to be magnetically attracted more strongly. For this reason, it is preferable that the magnetically attracted portion 22 is provided entirely on one surface of the marking member 20 (marking portion 21). In addition, it is preferable that the magnetically attracted portion 13 is formed to have the same size as the magnetically attracted portion 22. In the marking stake 1 of the first embodiment, the magnetically attracted portion 22 is provided entirely on one surface of the marking member 20, and the magnetically attracted portion 13 is formed to have a size that covers the entire bottom portion of the recess 12a and is slightly larger than the magnetically attracted portion 22.

[0028] While the magnetically attracted portion 22 and the magnetized portion 13 are formed of mutually magnetically attracted materials, it is preferable to form the marking portion 21 of a material that does not easily stick to them (hereinafter, sometimes referred to as a "non-magnetically attracted material"). This is because, if the marking portion 21 is formed of a magnetically attracted material, the marking portion 21 is magnetized by the magnetically attracted portion 22 (permanent magnet) and magnetically attracted to the magnetized portion 13 (the marking member 20 turns over and fits into the recess 12a). Examples of non-magnetically attracted materials that can be suitably used for the marking portion 21 include plastics and metals that are not easily attracted to permanent magnets, such as aluminum and copper. In the marking pile 1 of the first embodiment, the marking portion 21 is formed of aluminum that has been subjected to a rust-proofing treatment.

[0029] Similarly, it is preferable that the pile member 10 (pile body 11 and cap 12) is also made of a non-magnetically attractive material. This is because if the pile member 10 is made of a magnetically attractive material, the marking member 20 (magnetically attracted portion 22) will be magnetically attracted to unintended locations (locations other than the recess 12a). Examples of non-magnetically attractive materials that can be suitably used for the pile member 10 include plastic, wood, concrete, etc. In the marking pile 1 of the first embodiment, the pile member 10 is made of plastic (resin material).

[0030] In this way, in the marking pile 1 of the first embodiment, the magnetically attached portion 22 and the magnetically attached portion 13 are magnetically attached to the marking member 20, so that the marking member 20 may be removed by tampering if it is only magnetically attached. To prevent this, in the marking pile 1 of the first embodiment, the outer peripheral shape of the marking member 20 is made substantially the same as the inner wall shape of the recess 12a, so that there is almost no gap between the side of the marking member 20 and the inner wall of the recess 12a. This makes it difficult for a person to grasp the marking member 20 by hand, and makes it difficult to remove the marking member 20 by tampering. In addition, the range of positional deviation of the marking member 20 after attachment can be reduced. Furthermore, it is also possible to prevent rainwater, sand, dust, etc. from entering the gap and corroding or damaging various members.

[0031] However, if the gap between the side surface of the marking member 20 and the inner wall of the recess 12a is too small, it becomes difficult for the marking member 20 to fit into the recess 12a. For this reason, the width of the gap (the minimum value if not constant around the entire circumference) is preferably 0.1 mm or more. The width of the gap is more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. On the other hand, if the gap between the side surface of the marking member 20 and the inner wall of the recess 12a is too large, there is a risk that the marking member 20 may be removed using the gap as a clue. For this reason, the width of the gap (the maximum value if not constant around the entire circumference) is preferably 3 mm or less. The width of the gap is more preferably 2 mm or less, and even more preferably 1 mm or less.

[0032] Furthermore, if the marking member 20 protrudes from the cap 12 (recess 12a) to a certain extent, there is a risk that the marking member 20 may be removed by grabbing the protruding portion. For this reason, it is preferable that the amount of protrusion of the marking member 20 from the cap 12 (recess 12a) is 3 mm or less. It is more preferable that the amount of protrusion is 1 mm or less, and even more preferable that the amount of protrusion is 0.5 mm or less. In the marking pile 1 of the first embodiment, the thickness of the marking member 20 (the total thickness of the marking portion 21 and the magnetic portion 22) is approximately the same as the depth of the recess 12a (the height difference from the top surface of the magnetically attracted portion 13 to the top surface of the cap 12) (protrusion amount 0 mm).

[0033] It is also assumed that the marking member 20 will be replaced for maintenance or the like. For this reason, it is preferable to prepare a tool for removing the marking member 20. This allows a maintenance worker using the tool to easily remove the marking member 20, while making it difficult for a person who does not have the tool to easily remove the marking member 20. Examples of such a tool include a tool that enters the gap between the side surface of the marking member 20 and the inner wall of the recess 12a to scrape out the marking member 20, and a tool that applies a magnetic force (attractive force) to the magnetically attached portion 22 from the outside to pull out the marking member 20.

[0034] The outer peripheral shape of the marking member 20 (marking portion 21 and magnetic portion 22) is not particularly limited, but is preferably a shape with high rotational symmetry, such as a square (four-fold symmetry) or a circle (infinite symmetry). This allows the marking member 20 to be fitted into the recess 12a even if the orientation of the marking member 20 changes. In addition, the marking member 20 is preferably plate-shaped. This allows the marking member 20 to be easy to handle and compact while ensuring a larger marking area. In the marking pile 1 of the first embodiment, the marking member 20 is disk-shaped (see FIG. 1). This allows the marking member 20 to be fitted into the recess 12a regardless of the direction of the surface direction, and also allows the marking member 20 to be easy to handle and compact. Note that the marking member 20 can also be shaped such that the surface area (lower surface) of the magnetic portion 22 is smaller than the surface area (upper surface) of the marking portion 21. This allows the marking member 20 to be easily introduced into the recess 12a.

[0035] The size of the marking member 20 is not particularly limited and can be appropriately determined depending on the application. 2 (The diameter is about 2 to 12 cm) and the thickness (the total thickness of the marking portion 21 and the magnetic portion 22) is 0.5 to 3 cm.

[0036] In the marking member 20, the method of integrating the marking portion 21 and the magnetically attached portion 22 is not particularly limited. In the marking pile 1 of the first embodiment, the marking portion 21 and the magnetically attached portion 22 are bonded to each other using an adhesive. In addition to this, the marking portion 21 and the magnetically attached portion 22 can be engaged with each other to combine them more firmly. This makes it difficult for the marking portion 21 to peel off from the magnetically attached portion 22, and prevents only the marking portion 21 from being taken out when, for example, the marking member 20 is removed from the recess 12a.

[0037] The overall shape of the pile member 10 is not particularly limited, and may be, for example, columnar or rod-like. The lower end (tip) of the pile member 10 may be tapered to make it easier to drive into the ground. In the marker pile of the first embodiment, the vicinity of the lower end (tip) of the pile member 10 is a quadrangular pyramid, and the vicinity of the upper end (base end) of the pile member 10 is a quadrangular column (see FIG. 1). The size of the pile member 10 is also not particularly limited, and typically the length of the pile member 10 is within a range of 30 to 100 cm, and the cross-sectional area of ​​the upper end side of the pile member 10 is 25 to 400 cm. 2 (approximately 5 to 20 cm square).

[0038] The electronic device 30 is for enhancing the functionality of the marker stake 1 and is composed of various IC chips including electronic circuits. The functions and performance of the electronic device 30 are not particularly limited and can be appropriately determined according to the installation location and use of the marker stake 1. For example, when the marker stake 1 is installed on a mountainside or a cliff, a GPS (Global Positioning System) transmitter (location identification means) or an acceleration sensor (tilt measurement means) can be adopted as the electronic device 30. This makes it possible to detect changes in the driving position and driving angle of the marker stake 1. In addition, when these changes are detected, an alarm can be issued to the surroundings. As a result, it becomes possible to grasp the signs or occurrence of a landslide or cliff collapse.

[0039] Furthermore, when the marker stake 1 is installed on the bank of a river, a water detection sensor can be used as the electronic device 30. This makes it possible to detect when the water level of the river rises and the marker stake 1 becomes submerged. Furthermore, when submersion of the marker stake 1 is detected, an alarm can be issued to the surrounding area. As a result, it becomes possible to grasp the signs or occurrence of a flood.

[0040] Examples of the means for issuing an alarm include a light emitting means (such as a light emitting diode) and a sound generating means (such as a speaker). In addition, a transmitter can be incorporated in the marker stake 1 to transmit an alarm signal to, for example, a remote computer terminal (such as a cloud server).

[0041] The electronic device 30 may malfunction due to magnetism. Since the marking post 1 has a source of magnetism (magnetic part 22), it is preferable to protect the electronic device 30 from this magnetism. Specifically, it is preferable to place a member made of a material that attenuates (or blocks) magnetism (hereinafter referred to as antimagnetic material) between the magnetized part 13 and the electronic device 30. In the marking post 1 of the first embodiment, the cap 12 is a resin member mixed with antimagnetic material. However, it is also possible to place a member made of antimagnetic material between the magnetized part 13 and the electronic device 30 separately from the cap 12. For example, a resin sheet mixed with antimagnetic material (generally called antimagnetic sheet) may be attached to the entire back surface of the cap 12. Alternatively, the antimagnetic sheet may be inserted between the bottom of the recess 12a and the magnetized part 13. Examples of antimagnetic materials include permalloy, ferrite, and aluminum.

[0042] Furthermore, in order to reduce the effect of magnetism on the operation of the electronic device 30, it is preferable to place the electronic device 30 at a certain distance from the magnetized portion 13. Specifically, the distance between the electronic device 30 and the magnetized portion 13 is preferably 3 cm or more. On the other hand, when placing the electronic device 30 away from the magnetized portion 22, the storage portion 11a needs to be made deeper, and it takes time and effort to create a deep storage portion 11a. For this reason, it is preferable that the distance between the electronic device 30 and the magnetized portion 13 is not too large, for example, 30 cm or less.

[0043] 2. Second embodiment 3 is a perspective view showing the marker pile 1 of the second embodiment. The marker pile 1 of the second embodiment has substantially the same structure as that of the first embodiment, except for the structure of the marker member 20. For configurations (pile member 10, etc.) not specifically mentioned in the description of the second embodiment, substantially the same configuration as in the first embodiment can be adopted.

[0044] In the marking pile 1 of the first embodiment (FIGS. 1 and 2), the marking portion 21 of the marking member 20 is flat. In contrast, in the marking pile 1 of the second embodiment (FIG. 3), the marking portion 21 of the marking member 20 is flag-shaped (having a support portion 21a and a marking flag portion 21b). Specifically, the support portion 21a is erected on the flat magnetic portion 22, and the marking flag portion 21b is attached to the support portion 21a. By constructing the marking member 20 in this way, the location where the marking pile 1 is driven into the ground can be easily found even from a distance. In addition, when the marking flag portion 21b displays the pile-related information, the content can be understood even from a distance. The marking portion 21 can also be made to have only the support portion 21a (generally called a surveying pole) without the marking flag portion 21b.

[0045] 3. Third embodiment 4 is a perspective view showing the marker pile 1 of the third embodiment. The marker pile 1 of the third embodiment has substantially the same structure as that of the first embodiment, except for the attachment position of the marker member 20. For configurations not specifically mentioned in the description of the third embodiment, substantially the same configurations as those of the first embodiment can be adopted.

[0046] In the marking pile 1 of the first embodiment, the marking member 20 is attached to the top surface of the pile member 10. In contrast, in the marking pile 1 of the third embodiment, the marking member 20 is attached to the side surface of the pile member 10. Specifically, a recess 12a is provided on the side surface of the cap 12, and the marking member 20 is fitted into the recess 12a. The magnetically attached portion 22 of the marking member 20 is magnetically attached to the magnetically attached portion 13 (see FIG. 2) inside the recess 12a, so that the marking member 20 does not easily come off (fall off) from the recess 12a. The marking member 20 may be attached to the side surface of the pile body 11 instead of the side surface of the cap 12.

[0047] The attachment position of the marker member 20 can be appropriately determined depending on the application, etc. For example, when the marker pile 1 is used with only the top surface exposed above the ground, the attachment position of the marker member 20 may be the top surface of the pile member 10. Also, when the marker pile 1 is used as a signpost (when most of the top of the marker pile 1 is used with the top surface exposed above the ground), the attachment position of the marker member 20 can be the side surface of the pile member 10.

[0048] 4. Fourth embodiment 5 is a perspective view showing the marker pile 1 of the fourth embodiment. The marker pile 1 of the fourth embodiment has substantially the same structure as that of the first embodiment, except for the structure of the pile member 10. For configurations (particularly the marker member 20) not specifically mentioned in the description of the fourth embodiment, it is assumed that substantially the same configuration as that of the first embodiment can be adopted.

[0049] In the marker pile 1 of the first embodiment, the pile member 10 is thick and columnar, whereas in the marker pile 1 of the fourth embodiment, the pile member 10 is elongated. Also, in the marker pile 1 of the first embodiment, the pile member 10 is composed of a pile body 11 and a cap 12, whereas in the marker pile 1 of the fourth embodiment, the pile member 10 is composed of a single driving member 15.

[0050] The driving member 15 has a body 15a to be buried in the ground and a head 15b shaped to be easily struck with a hammer or the like. The length of the body 15a is not particularly limited, but is usually in the range of 5 cm to 20 cm. The shape of the head 15b is also not particularly limited, but is usually a disk shape with a diameter of about 3 cm. A recess 12a for fitting the marking member 20 is provided on the upper surface of the head 15b.

[0051] The driving member 15 is made of a material that is attracted to the magnetically attracted portion 22 (permanent magnet). In the marking pile 1 of the fourth embodiment, the driving member 15 is made of steel. The driving member 15 made of steel has high rigidity and is not easily deformed, so it can be relatively easily installed (driven into) ground paved with concrete, asphalt, or the like. The driving member 15 may be made of a material that is not easily attracted to the magnetically attracted portion 22 (permanent magnet). In this case, it is necessary to provide a separate magnetically attracted portion 13 (see FIG. 2). [Explanation of symbols]

[0052] 1 Marking post 10 Pile members 11 Pile body 11a Storage section 12 Cap 12a Recess 13 Magnetized part 15 Drive-in parts 15a Torso 15b (concave) head 20 Signing materials 21 Sign (flat type) 21a Support part (flag type) 21b Indicator flag section (flag type) 22 Magnetized part 30 Electronic Devices

Claims

1. A pile member having at least a lower end buried in the ground; A marking member attached to the top end surface or side surface of the stake member; A marking stake comprising: The marking member is provided with a magnetic portion, while the stake member is provided with a magnetically attracted portion, The magnetically attached portion and the magnetically attached portion are magnetically attached to each other, so that the marking member can be attached to the stake member. The pile member is A pile body, A cap is placed on the top of the pile body. Equipped with The magnetically attracted portion is provided on the cap, The pile body houses an electronic device; A member made of a magnetically-preventing material is disposed between the magnetically-adhered portion and the electronic device to magnetically protect the electronic device. A marking post characterized by:

2. The magnetized portion is disposed in a recess provided in the pile member, The marking member is fitted into the recess. The marker stake according to claim 1.

3. 3. The marker stake according to claim 2, wherein an outer surface of the marker member fitted in the recess is substantially flush with an outer surface of the stake member around the recess.

4. 4. The marker post according to claim 2 or 3, wherein the outer peripheral shape of the marker member is substantially the same as the inner wall shape of the recess.

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