Support column, lightning suppression device using the same, and method for disassembling the same

Abstract

To make a support column of a structure lightweight and easily assemblable and disassemblable.SOLUTION: A support column X includes a plurality of cylindrical main body portions 1 into which a linear member L can be inserted. The main body portion 1 has an enlarged end portion 11 at one end and a narrowed end portion 12 having a diameter shorter than that of the enlarged end portion 11 at the other end. A diameter of an inner peripheral surface side of one enlarged end portion 11 of the main body portion 1 is larger than that of an outer peripheral surface side of the narrowed end portion 12 of the other main body portion 1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a support pole that is lightweight, can be easily assembled and disassembled, and is applicable to outdoor facilities, and a lightning suppression device that uses the support pole. [Background technology]

[0002] With the development of IT, preventing infrastructure damage caused by lightning strikes is becoming increasingly important. As a result, the electrical equipment that needs to be protected from lightning strikes is becoming more diverse, both movable and immovable. Examples include aircraft parked in parking lots, alarm systems installed outdoors at dams, and easily installed bases at disaster sites. For this reason, methods have been devised that can be installed anywhere outdoors, not just on the roofs of buildings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7405348 Summary of the Invention [Problem to be solved by the invention]

[0004] The mobile lightning suppression device described in Patent Document 1 supports the lightning suppression device body at a predetermined height using support poles. It also uses a mobile trailer-mounted base to allow the device to be moved to outdoor locations such as parking lots and installed at desired locations. However, the support poles supporting the lightning suppression device body are made of metal to maintain electrical connection with the ground, making them heavy. On-site installation requires a considerable amount of equipment and personnel, which significantly limits their implementation and operation. Furthermore, for structures with such support poles, depending on the installation location, it may not be possible to install large-scale equipment such as heavy machinery. In such locations, it is preferable to use support poles that can be easily assembled by hand. Furthermore, from the perspectives of ensuring worker safety and cost, on-site installation work must be simple and quick.

[0005] In view of the above problems, an object of the present invention is to provide a support pole that is lightweight and can be easily assembled and disassembled. [Means for solving the problem]

[0006] The present invention, which solves the above-mentioned problems, is a support pillar having multiple cylindrical main body portions through which linear members can be inserted, wherein the main body portions have an enlarged end portion at one end and a narrowed end portion at the other end which has a smaller diameter than the enlarged end portion, and the diameter of the inner surface side of the enlarged end portion of one of the main body portions is larger than the diameter of the outer surface side of the narrowed end portion of the other of the main body portions. This configuration allows the support columns of the structure to be lightweight and easy to assemble and disassemble.

[0007] In a preferred embodiment of the present invention, the diameter of the enlarged end of the inserted-side main body portion is smaller than the diameter of the enlarged end of the inserted-side main body portion, in which the narrowed end portion is inserted and the inserted-side main body portion is inserted into the enlarged end portion of the inserted-side main body portion. This configuration allows one side of the support column to be thicker and more stable.

[0008] In a preferred embodiment of the present invention, the rate of decrease in diameter of the plurality of body portions from the enlarged end to the narrowed end in the axial direction is substantially constant. With this configuration, the plurality of main body portions can be easily connected by friction caused by insertion.

[0009] In a preferred form of the invention, the body portion has a groove along its side at the overlapping portion where the narrowed end is inserted into the other enlarged end. Such a configuration allows for the introduction of fluids to make disassembly of the support column easier.

[0010] In a preferred embodiment of the present invention, the groove is provided in a spiral shape. This configuration allows for a larger area into which fluid can be introduced and makes it easier to disassemble the support column.

[0011] In a preferred form of the present invention, the lightning suppression device comprises a support pillar, a lightning suppression device main body supported by the support pillar, and a base on which the support pillar can be erected, and the linear member is made of a conductive material and is inserted into the inside of the support pillar to enable the lightning suppression device main body to be grounded. Such a configuration makes it possible to easily install and dismantle the lightning suppression device.

[0012] The present invention, which solves the above-mentioned problems, is a method for disassembling a support column which has a plurality of cylindrical main body portions through which linear members can be inserted, the main body portions having an enlarged end portion at one end and a narrowed end portion at the other end which has a diameter shorter than that of the enlarged end portion, and the diameter of the inner surface of the enlarged end portion of one of the main body portions is larger than the diameter of the outer surface of the narrowed end portion of the other of the main body portions, and includes a liquid injection step of pouring a fluid into the inside of the support column and pulling out the plurality of connected main body portions from one another. This configuration reduces the load on the main body and allows the support column to be easily disassembled. [Effects of the Invention]

[0013] The present invention, which solves the above problems, makes support columns for structures lightweight and easy to assemble and disassemble. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an explanatory diagram showing a basic configuration of a support column according to an embodiment of the present invention. FIG. [Figure 2] 10A and 10B are explanatory diagrams showing a more preferable configuration of the support column according to an embodiment of the present invention. [Figure 3] 1 is an explanatory diagram showing an example of a support column according to an embodiment of the present invention. FIG. [Figure 4] 1 is an explanatory diagram showing the configuration of a lightning suppression device main body supported by a support pole according to an embodiment of the present invention. FIG. [Figure 5] 1 is an explanatory diagram showing the configuration of a lightning suppression device incorporating a support pillar according to an embodiment of the present invention. [Figure 6]1 is an explanatory diagram showing a state in the middle of installation or dismantling of a lightning suppression device incorporating a support pole according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, a support pole X and a lightning strike suppression device Y according to an embodiment of the present invention will be described with reference to the drawings. The description will be made in detail in the order of the configuration of the embodiment, the method of implementation, and other examples. It should be noted that the following embodiments are merely examples of the present invention, and the present invention is not limited to the following embodiments.

[0016] <Embodiment> As shown in Figures 1(a), 1(b), and 1(c), the support pole X according to this embodiment is configured by connecting multiple cylindrical main bodies 1. As shown in Figure 5(a), the lightning suppression device Y according to this embodiment includes a support pole X, a lightning suppression device main body 2 supported by the support pole X, and a base 3 on which the support pole X can be erected. In the following description, the direction of the central axis A and the length direction of the support pole X will be referred to as the axial direction, and any direction on a plane perpendicular to the axial direction will be referred to as the cross-sectional direction.

[0017] As shown in Figures 1(a), 1(b), and 1(c), the main body 1 is a tubular member that is waterproof and has sufficient strength. The cross-sectional diameter at one end in the axial direction is longer than that at the other end. The end with the longer cross-sectional diameter (one end) is designated as the expanded end 11, and the end with the shorter cross-sectional diameter (the other end) is designated as the narrowed end 12. The cross-sectional diameter of the main body 1 decreases at a constant rate in the axial direction from the expanded end 11 to the narrowed end 12 on both the outer and inner sides. Furthermore, the wall thickness of the tubular shape is approximately constant. Furthermore, the inner diameter of the expanded end 11 is larger than the outer diameter of the narrowed end 12, and this also applies to the relationship between multiple main bodies 1. With this configuration, multiple main bodies 1 can be easily connected concentrically by inserting the narrowed end 12 of one main body 1 into the expanded end 11 of another main body 1.

[0018] The material forming the main body 1 is preferably a resin that can be hardened at room temperature by drying or chemical reaction, for example. The resin is also preferably a material that is resistant to deterioration by light, ultraviolet rays, etc. With the above-described configuration, the support column X can be used outdoors for a long period of time.

[0019] When the material forming the main body 1 is the aforementioned resin, it is preferable that the resin contains at least one of the group consisting of isocyanate, polyamine, and polyol. In this case, the resin is particularly preferably a polyurea resin produced by a chemical reaction between isocyanate and polyamine, and even more preferably a polyol is mixed in addition to this. This configuration provides sufficient performance for the support column X used outdoors in terms of waterproofing, weather resistance, and tensile strength.

[0020] FIG. 1(c) is a cross-sectional view of FIG. 1(b) showing the state in which two main bodies 1 are connected, taken along a plane including the central axis A. In FIG. 1(c), the narrowed end 12 of the lower main body 1 is inserted into the expanded end 11 of the upper main body 1, creating a double wall. In the following description, this double wall will be referred to as the overlapping portion D. At one overlapping portion D, the main body 1 into which the narrowed end 12 is inserted will be referred to as the inserting-side main body, and the main body 1 into which the inserting-side main body is inserted into the expanded end 11 will be referred to as the inserted-side main body. At this overlapping portion D, the outer peripheral surface of the inserting-side main body and the inner peripheral surface of the inserted-side main body are in surface contact around the central axis A. This makes the contact area three-dimensional, and furthermore, a stable connection state is maintained by friction. In addition, when the support column X is set up vertically and an object to be supported is attached (or placed) on top of it, the weight of the outer object and the weight of the main body 1 itself can make the surface contact stronger at the overlapping part D, thereby stabilizing the entire support column X.

[0021] The axial length of the overlapping portion D is preferably 15% to 35% of the axial length of the main body portion 1 (particularly the inserted main body portion), and more preferably 20% to 30%. With this configuration, a stable connection between the main body portions 1 is maintained, and by appropriately limiting the length of the overlapping portion D and increasing the effective length per main body portion 1 (the axial length of the portion that does not become the overlapping portion D), the length of the support column X can be secured.

[0022] In the multiple main bodies 1 constituting the support column X, the rate of decrease in diameter (both for the outer and inner surfaces) from the expanded end 11 to the narrowed end 12 in the axial direction is approximately constant. Here, "approximately constant rate of decrease" includes cases where the rate of decrease from the diameter at the outer surface of the expanded end 11 to the diameter at the outer surface of the narrowed end 12 is completely constant, cases where the rate of decrease in the inserting main body is slightly greater than the rate of decrease in the receiving main body, or vice versa. This slight difference in rate of decrease is preferably determined by actual size. For example, the rate of decrease in the inserting main body is 0 to 2 mm greater than the axial length of the main body 1. This rate of decrease is similarly determined for the diameter from the inner surface of the expanded end 11 to the inner surface of the narrowed end 12.

[0023] 2(a) and 2(b) are explanatory diagrams showing a more preferred embodiment (or modified example) of the main body 1. In this embodiment, the main body 1 has a groove 13 extending from the narrowed end 12 along the side surface (outer circumferential surface). The groove 13 is provided from the narrowed end 12 along the side surface, and is slightly longer in the axial direction than the overlapping portion D, thereby enabling fluid to be introduced into the overlapping portion D. With this configuration, when the connected main bodies 1 are disassembled, a fluid (such as soapy water) can be poured from the groove 13 into the overlapping portion D, making the inserting main body part and the inserted main body part slippery, facilitating removal of the two.

[0024] The groove 13 is preferably configured to be spirally formed along the side surface of the main body 1, circling around the central axis A and axially moving away from the narrowed end 12. This configuration increases the amount of fluid that can be introduced into the overlapping portion D, easily reducing the contact resistance between the inserting main body portion and the inserted main body portion, and facilitating removal of both. The groove 13 may also be configured to have multiple overlapping spirals (such as a double spiral).

[0025] 3(a) and 3(b) show a more preferred embodiment (or a modified example) of the main body 1 constituting the support column X according to this embodiment. FIG. 3(a) illustrates the dimensional relationship between the main body 1, and FIG. 3(b) illustrates the state in which the five main body 1 shown in FIG. 3(a) are connected to form a single long support column X. In this embodiment, as shown in FIG. 3(b), it is preferable that the main body 1 be thinner in the cross-sectional direction as it approaches the vertically upper side. Therefore, in each pair of main body 1 connected at each overlapping portion D, the diameter of the outer surface side of the expanded end portion 11 of the inserted-side main body is smaller than the diameter of the outer surface side of the expanded end portion 11 of the inserted-side main body (the same applies to the diameters of the inner surfaces). This configuration allows the center of gravity to be low and stable even when the support column X is made long and erected vertically.

[0026] Fig. 4 is a cross-sectional view showing the configuration of a lightning suppression device main body 2 connectable to a support pole X. This device constitutes the main part of a lightning suppression device Y, and as shown in Fig. 4, includes an inner electrode 21 formed of a conductive material in a substantially spherical or spherical shell shape, an outer electrode 22 (which may be separated into two, a first outer electrode and a second outer electrode, or may be integrally molded) formed in a substantially concentric spherical shell shape with a predetermined gap between the inner electrode 21, a connecting pole 23 made of a conductive material that supports the inner electrode 21 and enables connection to the ground surface G, and a spacer 24 made of an insulating material that maintains the gap between the inner electrode 21 and the outer electrode 22 and supports the outer electrode 22.

[0027] The lightning suppression device main body 2 is connected to the support pole X through the connecting pole 23 and the connecting member C. At this time, the linear member L is inserted throughout the inside of the support pole X, and the inner electrode 21, the connecting pole 23, the linear member L, and the base part 3 are all made of conductive materials and are assembled in an electrically connected configuration, so that the inner electrode 21 is grounded and the lightning suppression device main body 2 acts as a capacitor, suppressing the occurrence of lightning strikes.

[0028] As shown in Fig. 4, the connection member C has a pair of flanges C1 and a reinforcing tube C2, and enables connection between the lightning suppression device main body 2 and the support pole X. The flange C1 is a flat plate-like member that is fixed by a surface-direction fixing connection (by adhesive bonding, bolting, etc.), and the reinforcing tube C2 is a thin-walled tubular member that stands upright from the flange C1 on the support pole X side. The connection member C has the reinforcing tube C2 inserted into the inside from the end of the support pole X, and the lightning suppression device main body 2 is fixedly connected at the flange C1. With this configuration, it is possible to reinforce the upper end of the support pole X and stabilize the connection with the lightning suppression device main body 2.

[0029] As shown in Figures 5(a) and 5(b), the lightning suppression device Y comprises a support pole X, a lightning suppression device main body 2 that is supported by the support pole X and forms the core of lightning suppression, and a base 3 on which the support pole X can be erected, and can be installed and dismantled at a desired location as needed. A connecting member C is provided at the connection between the lightning suppression device main body 2 and the support pole X, and as shown in Figure 5(b), a linear member L is inserted inside the support pole X. The lightning suppression device Y also comprises a support wire W as needed.

[0030] 5(b), the linear member L is a conductive member that can be inserted into the support pole X, and in the lightning suppression device Y, it is inserted vertically through the entire support pole X, electrically connecting the lightning suppression device main body 2 and the base part 3. With this configuration, the lightning suppression device main body 2 is grounded in a manner that is not visible from the outside, improving the lightning protection effect of the lightning suppression device Y and also improving the design of the entire device.

[0031] As shown in Fig. 5(a), the base 3 is a structure made of a conductive material and has a frame 31, a support pole mounting portion 32, and a protrusion 33. It is placed on the ground surface G and allows the support pole X to be erected on top of it. This allows the lightning suppression device main body 2 to be grounded via the support pole X, particularly the linear member L inserted inside the support pole X. Fig. 5(b) is a cross-sectional view showing the inside of the support pole X in Fig. 5(a) and an enlarged view showing the configuration of the support pole mounting portion 32 and another form.

[0032] The frame 31 is a structure that determines the basic shape of the foundation 3, and is made up of a rectangular outer frame made up of columnar frame materials, particularly H-shaped steel beams, with a bottom plate attached to its bottom, and is placed on and grounded to the ground surface G. The frame 31 has a sufficient horizontal area and is weighted by H-shaped steel beams or the like, so that even if no work is done to fix the frame 31 to the ground surface G, it can adequately support the support column X and the lightning suppression device main body 2, and also has stable contact with the ground surface G, allowing the lightning suppression device main body 2 to be stably grounded.

[0033] The support pole mounting part 32 is provided in the horizontal center of the frame body 31 and is a structure having an insertion part 321, a movable bottom plate 322, and an upright joint part 323, and allows the support pole X to be attached and raised or lowered. With this configuration, the horizontal width of the frame body 31 can be effectively used to support the lightning suppression device main body 2 and the support pole X.

[0034] As shown in FIG. 5( b), the insertion section 321 is a columnar member that can be inserted into the expanded end 11 of the support column X to support it in an upright position. The insertion section 321 has ribs or rounded corners to reinforce the connection with the movable bottom plate 322. The movable bottom plate 322 is a flat plate-like member that closes the bottom of the insertion section 321 and expands further. It is rotatably connected to the frame body 31 via the erection joint 323. The movable bottom plate 322 can abut the upper surface of the frame body 31. With this configuration, when the support column X connected to the lightning suppression device main body 2 is raised and erected, the movable bottom plate 322 stops the rotation of the erection joint 323, preventing the support column X from being raised too far and tipping over to the other side. This allows for safe installation of the lightning suppression device Y. Furthermore, when dismantling and removing the lightning suppression device Y, the support column X only tip in one direction, making it easier to ensure safety during the work.

[0035] The protruding portion 33 is a columnar member that protrudes vertically upward from the frame body 31, and the protruding height is higher than the highest point of the support column mounting portion 32. With this configuration, when multiple frame bodies 31 are stacked when not in use, the protruding portion 33 of the lower frame body 31 receives the bottom surface of the upper frame body 31, so that it does not come into contact with the support column mounting portion 32, and the frame bodies 31 can be easily lifted and moved using a forklift or by human power.

[0036] As shown in Figure 3(a), the guy wire W is a wire stretched in multiple directions between any position on the support pole X incorporated in the lightning suppression device Y and the vicinity of the periphery of the frame body 31, and its tension suppresses the horizontal swaying of the support pole X. Furthermore, the guy wire W is not particularly limited in its connection with the support pole X as long as it has the strength to prevent it from falling off, but an example is a configuration in which the guy wire W is sandwiched between the two main bodies 1 at the overlapping part D, and a mounting fixture (an extension such as a ring or flange) is provided to mount the guy wire W to one of the main bodies 1, and the guy wire W is locked, fastened, etc. to this.

[0037] As a modification of the above-described foundation part 3, as shown in Fig. 5(b), the support pole mounting part 32 may be configured to be fixed directly to the ground surface G without any other components of the foundation part 3. In this case, the support pole X and the lightning suppression device main body 2 are installed in a predetermined location. In this case, the guy wire W is fixed to the ground surface G or the like by driving a fastener 34 (anchor bolt, stake, etc.) into the ground surface G or the like.

[0038] In addition to the above configuration, the foundation 3 further has fasteners 34 that stop the rotation of the movable bottom plate 322. The fasteners 34 are columnar members that penetrate the movable bottom plate 322 and are fixed to a member vertically below or below the ground surface G (such as underground) to stop the rotation of the movable bottom plate 322, and are made of piles, anchor bolts, or the like, as in the case of fixing the guy wires W described above.

[0039] An embodiment of the present invention having the above configuration will be described below. However, the following configuration is merely an example, and various numerical values ​​etc. can be changed as desired within a range that does not pose a safety problem.

[0040] Example The dimensions of each of the five main bodies 1 shown in Figures 3(a) and 3(b) are that the axial length of all five is 400 cm, and the overlapping portions D are 100 cm at all locations. Examples of the diameters of the five main bodies 1 in the cross-sectional direction are shown below. However, the order of the main bodies 1 is from the bottom as shown in Figure 3(a), and the diameters of the expanded end portions 11 are all on the inner circumferential surface side, and the diameters of the narrowed end portions 12 are all on the outer circumferential surface side. In this example, the first is 30.0 cm at the enlarged end 11 and 26.0 cm at the narrowed end 12, the second is 27.0 cm at the enlarged end 11 and 23.4 cm at the narrowed end 12, the third is 24.3 cm at the enlarged end 11 and 21.1 cm at the narrowed end 12, the fourth is 20.3 cm at the enlarged end 11 and 17.6 cm at the narrowed end 12, and the fifth is 15.6 cm at the enlarged end 11 and 13.5 cm at the narrowed end 12.

[0041] The present invention may have the following configurations. However, the configurations shown below are merely examples, and unless otherwise specified, the presence or absence of the configurations can be determined arbitrarily.

[0042] <Example of change> As described above, the main body 1 may have a laminated structure with a concentric axis of a central axis A, as long as the surface is made of a waterproof material with sufficient strength. For example, the structure may be such that, starting from the layer closest to the central axis A, the layers are resin, paper or wood, and resin. This structure allows for the use of sufficient material within the thickness of the main body 1 to maintain its shape, improving the safety and durability of the main body 1.

[0043] Regarding the configuration of the main body 1 as described above, including the drawings, a circular cross-sectional shape is primarily assumed. However, the cross-sectional shape of the main body 1 may be any other shape as long as the sides of the larger and smaller areas do not intersect when assuming similar shapes with the same center or center of gravity. For example, an ellipse, a polygon (particularly a convex polygon, or even a regular polygon), etc. Furthermore, the diameter in this case refers to a straight line (major axis, minor axis, diagonal, etc.) passing through the interior of the shape, and the configuration of the main body 1 can be determined by interpreting it in this way.

[0044] Hereinafter, a method for carrying out the present invention will be described in detail with reference to the drawings. The ...

[0045] <<Implementation Method>> First, the user assembles the support column X. In this process, as shown in Figures 1(a), 1(b), 1(c), 2(a), and 2(b), the narrowed end 12 of one main body 1 is inserted into the expanded end 11 of another main body 1, and the side surfaces of the two main bodies 1 are brought into surface contact at the overlapping portion D. Furthermore, in the case of a configuration in which the diameter of the main body 1 tapers overall, as shown in Figures 3(a) and 3(b), the main body 1 is assembled in descending order of cross-sectional diameter, with the largest diameter at the bottom vertically.

[0046] Next, the user inserts a linear member L made of a conductive material into the assembled long support pole X. Next, the user electrically connects one end of the linear member L drawn out from the narrowed end of the support pole X to the inner electrode 21 of the lightning suppression device main body 2, and further connects the lightning suppression device main body 2 to the narrowed end of the support pole X via the connecting member C. However, the linear member L may be inserted before connecting the multiple main bodies 1, and then the main bodies 1 may be connected to each other.

[0047] Next, the user attaches the enlarged end of the support pole X to the support pole mounting portion 32 of the base 3. At this time, the base 3 is placed at the location where the lightning suppression device Y will be installed, or is fixed to the ground surface G only by the support pole mounting portion 32. At this time, the user electrically connects the linear member L directly to the base 3 or the ground surface G, and then connects the support pole X by placing it over the insertion portion 321. At this time, the insertion portion 321 is lying with its axial direction approximately parallel to the ground surface G, and from there, the support pole X to which the lightning suppression device main body 2 is attached is raised, as shown in Figure 6(a).

[0048] Fig. 6(a) shows the state of the lightning suppression device Y during installation or dismantling. When raising the support pole X, the user attaches one end of the branch wire W via a mounting flange F attached to one of the main body parts 1, and while pulling the branch wire W, pushes up the support pole X with the auxiliary tool R until the support pole X stands up vertically, as shown in Fig. 5(a). Then, the other end of the branch wire W is fixed to the frame body 31 or the ground surface G, etc., and the lightning suppression device Y is installed.

[0049] When dismantling the lightning suppression device Y, the user first tilts the support pole X to which the lightning suppression device main body 2 is attached, in the reverse order of the installation method described above, and lays it down to an appropriate angle, as shown in Figure 6(a). Then, as shown in Figure 6(b), the user removes the lightning suppression device main body 2 (and connecting member C) from the support pole X.

[0050] Furthermore, the user injects a fluid into the support pole X from the boundary portion connecting the main body portions 1 to reduce the contact resistance at the overlapping portion D, and then pulls the connected main body portions 1 from each other and from the support pole mounting portion 32, thereby disassembling the support pole X (injection process). In this injection process, a fluid injection device P is used, and the fluid preferably contains an oily material (such as soapy water). This allows for easy disassembly of the main body portions 1 and the support pole mounting portion 32, which are firmly connected by friction due to surface contact. In this injection process, if the main body portions 1 have grooves 13, the fluid is injected into the grooves 13 in each portion. If no grooves 13 are provided, the fluid is injected from the end of the support pole X from which the lightning suppression device main body 2 was removed. This disassembly method reduces the load required to pull the main body portions 1 from each other, making it easy to disassemble the support pole X. [Explanation of symbols]

[0051] X support column Y Lightning Suppression Device 1 Main body 11 Enlarged end 12 Stenotic end 13 Groove 2. Lightning suppression device body 21 Inner electrode 22 Outer electrode 23 Connecting pillar 24 spacer 3 Foundation part 31 Frame 32 Support column mounting part 321 Insertion part 322 Movable bottom plate 323 Vertical joint 33 Protrusion 34 Fasteners A center axis C Connection member D Overlapping part F Mounting flange G ground plane P Liquid injection device R Auxiliary equipment W branch line

Claims

1. A support column having a plurality of cylindrical main bodies through which linear members can be inserted, The body portion has an enlarged end portion at one end and a narrowed end portion at the other end, the narrowed end portion having a diameter smaller than that of the enlarged end portion; A support pillar, wherein the diameter of the inner peripheral surface side of the expanded end of one of the main body portions is larger than the diameter of the outer peripheral surface side of the narrowed end of the other of the main body portions.

2. an insertion-side main body portion into which the narrowed end portion is inserted and an insertion-side main body portion into which the insertion-side main body portion is inserted into the expanded end portion, the diameter of the expanded end portion of the insertion-side main body portion being smaller than the diameter of the expanded end portion of the insertion-side main body portion; The support column of claim 1 .

3. a rate at which the diameter of the plurality of body portions decreases from the enlarged end portion to the narrowed end portion in the axial direction is substantially constant; The support column of claim 1 .

4. The main body portion has a groove formed along a side surface at an overlapping portion formed by inserting the narrowed end portion into the other enlarged end portion. The support column of claim 1 .

5. The groove is provided in a spiral shape. The support column of claim 4.

6. A lightning suppression device comprising: a support pole according to any one of claims 1 to 5; a lightning suppression device main body supported by the support pole; and a base portion on which the support pole can be erected, The lightning suppression device, wherein the linear member is made of a conductive material and is inserted into the inside of the support pole to enable the lightning suppression device main body to be grounded.

7. A method for disassembling a support column, comprising: a plurality of cylindrical main body portions through which a linear member can be inserted; the main body portions each having an enlarged end portion at one end and a narrowed end portion at the other end, the narrowed end portion having a diameter smaller than that of the enlarged end portion; and a diameter of an inner peripheral surface of the enlarged end portion of one of the main body portions being larger than a diameter of an outer peripheral surface of the narrowed end portion of another of the main body portions, A disassembly method including a liquid injection step of injecting a fluid into the inside of the support column and pulling out the connected main body portions from each other.

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