Construction method for interlocking-type extension mast

Abstract

A mounting member 10 according to the present disclosure can be mounted on a first cylindrical part 21 of each segment pipe 20 of an interlocking-type extension mast 100 consisting of a plurality of segment pipes 20 having a cylindrical shape. A guide taper part 12 having an outer diameter which is reduced in a predetermined direction, and that can be housed in a second cylindrical part 22 of each segment pipe 20, is formed.

Description

How to install interlocking extension columns

[0001] The present disclosure relates to an interlocking type joint column that can improve construction efficiency.

[0002] In recent years, a lineup of extension poles has emerged that function similarly to a single utility pole by joining multiple divided steel or concrete pipes. Regarding such extension poles, a mating joining method is known as a typical method for joining cylindrical pipes (see Non-Patent Document 1).

[0003] In the case of the interlocking joining method, it is necessary to align and sequentially interlock the other pipes with the lower pipe installed on the ground, but such alignment takes time and requires skill.

[0004] Nippon Steel Construction Materials Corporation, website [online], [searched August 16, 2024], Internet <URL: https: / / www.ns-kenzai.co.jp / hltubular-c.html>

[0005] Therefore, an object of the present disclosure is to provide an attachment member, a connecting post, and a method for installing the connecting post that allow for easy alignment when mating.

[0006] In order to achieve the above-mentioned objective, the mounting member of the present disclosure employs a technique in which a guide taper portion is formed on the mounting member that can be attached to each pipe that constitutes the connecting column, the guide taper portion having a diameter that narrows in a predetermined direction and an outer diameter that can be accommodated in the other end of each pipe.

[0007] Specifically, the mounting member can be attached to one end of each tube of a connecting column made up of multiple tubes formed in a cylindrical shape, and is formed with a guide taper portion that narrows in diameter in a predetermined direction and has an outer diameter that can be accommodated in the other end of each of the tubes.

[0008] More specifically, the connecting column of the present disclosure is a connecting column formed by fitting together a plurality of pipes each having the above-mentioned mounting member attached to at least one of them, and at one end of each of the pipes, a contact tapered portion is formed in a portion other than the portion where the mounting member is attached, which contacts the other end of another pipe.

[0009] The taper rate of the guide tapered portion may be greater than the taper rate of the contact tapered portion.

[0010] More specifically, the construction method of the extension column disclosed herein comprises attaching an attachment member to at least one end of each of the tubes of the extension column, which is composed of a plurality of tubes formed in a cylindrical shape, and which has a guide taper portion that reduces in diameter in a predetermined direction and has an outer diameter that can be accommodated in the other end of each of the tubes, and fitting the tubes together to accommodate the attachment member.

[0011] The above disclosures can be combined as much as possible.

[0012] According to the present disclosure, alignment during mating can be easily performed.

[0013] FIG. 1 is a diagram showing a connecting post according to an embodiment of the present disclosure. FIG. 2 is a diagram showing the configuration of an attachment member according to an embodiment of the present disclosure. FIG. 3 is a diagram showing the configuration of a split pipe according to an embodiment of the present disclosure. FIG. 4 is a diagram showing how the attachment member is attached to the split pipe. FIG. 5 is a diagram explaining the construction of a connecting post. FIG. 6 is a diagram explaining the construction of a connecting post. FIG. 7 is a diagram showing a modified example of the attachment member and split pipe according to an embodiment of the present disclosure. FIG. 8 is a diagram explaining a structure for fitting the attachment member into the split pipe. FIG. 9 is a flowchart explaining the construction flow for fitting the attachment member into the split pipe. FIG. 10 is a diagram showing an example in which a notch is provided in the attachment portion. FIG. 11 is a diagram showing an example in which a notch is provided in the attachment portion. FIG. 12 is a diagram showing an example in which a screw is provided in the attachment portion. FIG. 13 is a diagram showing an example in which a button is provided in the attachment portion.

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below. These implementation examples are merely illustrative, and the present disclosure can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art. Note that components with the same reference numerals in this specification and drawings indicate the same components.

[0015] (Configuration of Interlocking Type Extension Column) The configuration of the interlocking type extension column 100 according to an embodiment of the present disclosure will be described with reference to Figures 1 to 4. In the following description, unless otherwise specified, the interlocking type extension column 100 and the pipes that make up the interlocking type extension column 100 will be described based on a situation in which they extend in the vertical direction.

[0016] As shown in Figure 1, the interlocking type extension pole 100 is configured to function similarly to a single utility pole by stacking multiple split pipes 20 (a lower pipe 20L, two intermediate pipes 20M, and an upper pipe 20U) in order from the bottom up. Mounting members 10 are attached to the upper ends of the lower pipe 20L, the two intermediate pipes 20M, and the upper pipe 20U. Note that the mounting member 10 may be provided on at least one of the split pipes 20.

[0017] The interlocking type extension column 100 is formed by interlocking one end of each of a plurality of cylindrically formed split pipes 20, where the mounting member 10 is provided, with the other end of the other pipe. Note that the number of divisions of the interlocking type extension column to which the technology of the present disclosure is applied is not limited to the case shown in Figure 1, and the technology of the present disclosure is applicable regardless of the number of divisions of the interlocking type extension column. The technology of the present disclosure is also applicable to traffic lights, street lights, etc., constructed using multiple pipes.

[0018] The mounting member 10 can be attached to one end of each split pipe 20 of an interlocking extension column 100, which is composed of multiple split pipes 20 formed in a cylindrical shape. Specifically, the mounting member 10 has a cap shape that can be attached to the upper end of the split pipe 20. As shown in FIG. 2 , the mounting member 10 is generally hollow and cylindrical, and includes a cylindrical portion 11 and a guide tapered portion 12. However, the mounting member 10 does not necessarily have to be hollow and may have a hat-like shape with a closed upper end. The cylindrical portion 11 has a cylindrical shape extending vertically. The guide tapered portion 12 has a tapered shape that tapers upward from the upper end of the cylindrical portion 11 at a predetermined taper rate. In other words, the guide tapered portion 12 has a tapered shape in which the outer diameter and inner diameter decrease as it extends upward. In other words, the guide tapered portion 12 decreases in diameter as it approaches the upper end of the mounting member 10. The upper side in FIG. 2 is an example of a "predetermined direction."

[0019] The taper ratio is calculated using the following formula: Taper ratio = (diameter of large diameter portion - diameter of small diameter portion) / 100. In this embodiment, the taper ratio of the guide tapered portion 12 is designed to be 1 / 15 or less. This simplifies the alignment of the mounting member 10 and the split pipe 20.

[0020] The mounting members 10 can be applied regardless of the number of divisions of the interlocking joint 100. The material of the mounting members 10 is arbitrary. The material of the mounting members 10 may be an elastic material or metal. The material of the mounting members 10 may be, for example, metal, silicon, rubber, plastic, etc. Furthermore, the material of each mounting member 10 may be different.

[0021] As shown in FIG. 3 , the split pipe 20 has an overall hollow cylindrical shape (see dotted line) and includes a first cylindrical portion 21, a second cylindrical portion 22, and a contact tapered portion 23. The first cylindrical portion 21 and the second cylindrical portion 22 are cylindrical and extend in the vertical direction. The inner diameter of the first cylindrical portion 21 is larger than the outer diameter of the guide tapered portion 12 of the mounting member 10. The outer diameter of the second cylindrical portion 22 is smaller than the outer diameter of the first cylindrical portion 21. As a result, the first cylindrical portion 21 can accommodate the second cylindrical portion 22 of another split pipe 20 to which the mounting member 10 is attached. In other words, the guide tapered portion 12 can be accommodated in the first cylindrical portion 21 of the split pipe 20. The first cylindrical portion 21 is an example of a "one end portion." The second cylindrical portion 22 is an example of a "other end portion."

[0022] The abutting tapered portion 23 is provided to connect the upper end of the first cylindrical portion 21 and the lower end of the second cylindrical portion 22. Specifically, the abutting tapered portion 23 is provided to abut against the second cylindrical portion 22 of another split pipe 20 at a portion of the first cylindrical portion 21 of each pipe other than the portion where the mounting member 10 is attached. The abutting tapered portion 23 has a tapered shape that tapers upward. In other words, the abutting tapered portion 23 has a tapered shape in which the outer diameter and inner diameter become smaller as it extends upward. In other words, the diameter of the abutting tapered portion 23 decreases as it extends upward. The taper rate of the guide tapered portion 12 may be configured to be greater than the taper rate of the abutting tapered portion 23.

[0023] 1, the upper pipe 20U, which is located at the top of the split pipes 20, has only the first cylindrical portion 21. However, the scope of the present disclosure is not limited to this, and the upper pipe 20U may also be provided with the second cylindrical portion 22 and the contact tapered portion 23. This allows for appropriate response when it becomes necessary to suddenly fit another pipe from above the upper pipe 20U.

[0024] Each split pipe 20 may be any type of columnar structure that can be fitted together, such as a steel pipe pole, a concrete pole, a traffic light, or a street lamp. However, the material of each split pipe 20 is not limited. For example, each split pipe 20 can be designed using various materials depending on the situation or the occasion. Furthermore, each split pipe 20 may be made of a different material.

[0025] The lengths of the first cylindrical portion 21, the second cylindrical portion 22, and the contact tapered portion 23 may be different between the lower pipe, the intermediate pipe, and the upper pipe.

[0026] As shown in Figure 4, the mounting member 10 is mounted on the second cylindrical portion 22 of the split pipe 20. Here, the mounting member 10 can be mounted on the second cylindrical portion 22 by any method. If the mounting member 10 is made of an elastic material (e.g., rubber), it may be mounted directly on the second cylindrical portion 22. On the other hand, if the mounting member 10 is made of metal or the like, it may be fixed by tightening. Specific methods for mounting the mounting member 10 on the second cylindrical portion 22 will be described later.

[0027] 1, the outer diameters of the guide taper portion 12 of each mounting member 10 and the second cylindrical portion 22 of each split pipe 20 are smaller than the inner diameter of the first cylindrical portion 21 of each split pipe 20. In particular, because the guide taper portion 12 has a tapered shape that narrows toward the top, it is spaced apart from the inner circumferential surface of the first cylindrical portion 21 when the split pipes 20 are fitted together. Furthermore, when the split pipes 20 are fitted together, the distance by which the guide taper portion 12 is spaced apart from the inner circumferential surface of the first cylindrical portion 21 increases upward.

[0028] With this configuration, when the split pipes 20 are fitted together by bringing the first cylindrical portion 21 close to the guide tapered portion 12 from above (in other words, by inserting the guide tapered portion 12 from below onto the inner circumferential surface of the first cylindrical portion 21), a gap is created between the guide tapered portion 12 and the inner circumferential surface of the first cylindrical portion 21, making it easy to align the split pipes 20. In other words, the split pipes 20 can be fitted together so that the first cylindrical portion 21, which has a larger inner diameter, covers the guide tapered portion 12, which has a smaller diameter, from above, making it easy to align the split pipes 20.

[0029] Furthermore, since the guide tapered portion 12 is tapered upward, it is possible to suppress axial misalignment of each split pipe 20.

[0030] Furthermore, when the split pipes 20 are interlocked, the lower end of the first cylindrical portion 21 of each split pipe 20 abuts against the contact tapered portion 23 of the split pipe 20. Because the contact tapered portion 23 is tapered upward, the pressure between the first cylindrical portion 21 and the contact tapered portion 23 increases, allowing the split pipes 20 to be interlocked properly. Even if each split pipe 20 is made of concrete, the contact tapered portion 23 may be made of steel. However, there are no restrictions on the combination of materials for all parts of each split pipe 20, and the combination of materials for each split pipe 20 is arbitrary. For example, each split pipe 20 can be designed using a combination of materials freely depending on the situation or application.

[0031] (Construction of interlocking type joint column) Next, construction of the interlocking type joint column 100 will be described with reference to Figures 5 and 6. Figures 5 and 6 show a case where a heavy machine 300 is used to engage an intermediate pipe 20M with a lower pipe 20L whose lower part is buried in the ground G.

[0032] The heavy equipment 300 is a gripping-type pole erection vehicle that grips and installs each split pipe 20 of the interlocking type extension pole 100. The worker operates the heavy equipment 300 to grip the intermediate pipe 20M with the mounting member 10 attached. The worker operates the heavy equipment 300 to bring the first cylindrical portion 21 of the intermediate pipe 20M close to the guide taper portion 12 of the mounting member 10 attached to the lower pipe 20L from above, and inserts the guide taper portion 12 into the inner circumferential surface of the first cylindrical portion 21 from below. While this embodiment describes a case in which the heavy equipment 300 is operated to grip each split pipe 20, the scope of the present disclosure is not limited thereto. The interlocking type extension pole 100 can be installed using any heavy equipment or device. For example, the interlocking type extension pole 100 can also be installed using a hole-digging pole erection vehicle or a bucket vehicle.

[0033] 6, a gap is generated between the guide tapered portion 12 of the mounting member 10 attached to the lower pipe 20L and the first cylindrical portion 21 of the intermediate pipe 20M. In this way, the split pipes 20 can be easily aligned with each other by fitting the split pipes 20 together so that the first cylindrical portion 21, which has a larger inner diameter, covers the guide tapered portion 12, which has a smaller diameter, from above.

[0034] Thereafter, the lower end of the first cylindrical portion 21 of the intermediate pipe 20M comes into contact with the contact tapered portion 23 of the lower pipe 20L. Because the contact tapered portion 23 is tapered upward, the pressure between the first cylindrical portion 21 and the contact tapered portion 23 increases, allowing the split pipes 20 to be properly fitted together.

[0035] (Modification) Next, the configuration of a mounting member 10A and a split pipe 20A according to a modification will be described with reference to FIG.

[0036] The mounting member 10A has a hollow cylindrical shape as a whole. The mounting member 10A includes a tapered portion 11A and a guide tapered portion 12A. The tapered portion 11A and the guide tapered portion 12A each have a tapered shape that tapers upward at a predetermined taper rate.

[0037] In this modification, the taper ratio of the tapered portion 11A is designed to be approximately 1 / 75, and the taper ratio of the guide tapered portion 12 is designed to be approximately 1 / 15 to 1 / 20. In this way, by designing the taper ratio of the guide tapered portion 12 to be larger than the taper ratios of the other portions, it is possible to easily align the respective split pipes with each other.

[0038] The split pipe 20A includes a first cylindrical portion 21A similar to the first cylindrical portion 21 in the first embodiment, a tapered portion 22A, and an abutting tapered portion 23A. The taper ratio of the tapered portion 22A is designed to be approximately 1 / 75. In other words, the taper ratio of the tapered portion 11A of the mounting member 10A and the taper ratio of the tapered portion 22A of the split pipe 20A are designed to be approximately the same. When the mounting member 10A is mounted on the split pipe 20A, the pressure at the contact surface between the tapered portion 11A and the tapered portion 22A can be increased, allowing the mounting member 10A to be mounted suitably on the split pipe 20A.

[0039] The inner diameter of tapered portion 11A is configured to be larger than the outer diameter of tapered portion 22A. This allows mounting member 10A to be mounted on split pipe 20A so that tapered portion 11A, which has a larger inner diameter, covers tapered portion 22A, which has a smaller diameter, from above, making it easy to align mounting member 10A and mount it on split pipe 20A.

[0040] The taper ratio of the contact tapered portion 23A is designed to be approximately 1 / 25. In other words, the taper ratio of the contact tapered portion 23A is designed to be greater than the taper ratio of the tapered portion 11A (tapered portion 22A). Note that the taper ratios may be any value as long as the taper ratio of the contact tapered portion 23A is designed to be greater than the taper ratio of the tapered portion 11A (tapered portion 22A). By providing multiple types of tapers in this way, different types of split pipes can be fitted to the split pipe 20A with the mounting member 10A attached, depending on the situation.

[0041] Specifically, when a split pipe having an inner circumferential surface with a relatively large diameter at its lower end is fitted to the split pipe 20A, the fitting may be performed using the abutting tapered portion 23A, and when a split pipe having an inner circumferential surface with a relatively small diameter at its lower end is fitted to the split pipe 20A, the fitting may be performed using the tapered portion 11A. However, the scope of the present disclosure is not limited to this, and only either the tapered portion 11A (tapered portion 22A) or the abutting tapered portion 23A may be tapered.

[0042] The split pipe 20A includes a tapered section 24A and a third cylindrical section 25A. The tapered section 24A is tapered upward. The upper end of the tapered section 24A is connected to the lower end of the first cylindrical section 21A, and the lower end of the tapered section 24A is connected to the upper end of the third cylindrical section 25A.

[0043] The taper ratio of the tapered portion 24A is designed to be approximately 1 / 80. In other words, the taper ratio of the tapered portion 24A is smaller than the taper ratios of the other tapered portions. Because the tapered portion 24A has such a tapered shape, even if axial misalignment occurs when another split pipe is mated with the lower end (third cylindrical portion 25A) of the split pipe 20A, the guide tapered portion of the mounting member attached to the split pipe is guided by the inner circumferential surface of the tapered portion 24A. This prevents axial misalignment. The taper ratio of the tapered portion 24A may be any value as long as it is smaller than the taper ratio of the tapered portion formed on the mounting member attached to the split pipe mated with the lower end of the split pipe 20A.

[0044] (Attaching the Attachment Member to the Split Pipe) Next, with reference to Figure 8, the attachment of the attachment member 10 to the split pipe 20 will be described. The attachment member 10 has an attachment portion 13 at its lower end, and the split pipe 20 has an attachment receiving portion 26 at its upper end.

[0045] If the mounting member 10 is made of a stretchable material (e.g., rubber), the mounting member 10 is attached to the split pipe 20 by placing the mounting portion 13 (cylindrical portion 11) of the mounting member 10 over the mounting receiving portion 26 (second cylindrical portion 22) of the split pipe 20, as shown by arrow A in Figure 8. However, the scope of the present disclosure is not limited to this, and the mounting portion 13 may be configured to fit into the inner circumferential surface of the mounting receiving portion 26.

[0046] On the other hand, when the mounting member 10 is made of metal or the like, the mounting member 10 is attached to the split pipe 20 by tightening the mounting portion 13 to the mounting receiving portion 26. Various methods for tightening the mounting portion 13 to the mounting receiving portion 26 are included. In this embodiment, the mounting member 10 is brought close to the split pipe 20 while rotating it relative to the split pipe 20, and the mounting portion 13 and the mounting receiving portion 26 are butted together and fitted together by using a predetermined method such as manual labor or a crane. Then, the mounting member 10 is rotated relative to the split pipe 20 about its cylindrical axis, thereby joining the mounting portion 13 and the mounting receiving portion 26 and securing the mounting member 10 to the split pipe 20.

[0047] Although the above describes the case where the mounting member 10 is rotated relative to the split pipe 20, it is sufficient to rotate the mounting member 10 and the split pipe 20 relative to each other, and it is also possible to rotate the split pipe 20 relative to the mounting member 10.

[0048] In addition, in the above, we have described the case where the mounting member 10 and the split pipe 20 are butted together and fitted together while rotating, but it is also possible to butt the mounting member 10 against the split pipe 20 and then rotate the mounting member 10 and the split pipe 20 relative to each other.

[0049] (Installation Flow) Next, with reference to Figure 9, a construction flow for installing the installation member 10 to the split pipe 20 will be described. Here, the installation member 10 will be described as being made of metal or the like. More specifically, the installation will be described as being of a rotational type in which the installation portion 13 and the installed portion 26 are joined by rotating the installation member 10 and the split pipe 20 relative to each other.

[0050] In step S1, the worker installs the split pipe 20 using a predetermined method. For example, if the split pipe 20 is a lower pipe 20L, the worker installs the lower pipe 20L on the ground using a predetermined method. On the other hand, if the split pipe 20 is an intermediate pipe 20M, the worker connects the intermediate pipe 20M to the lower pipe 20L or another intermediate pipe 20M using a predetermined method. For example, the worker may install the split pipe 20 using heavy machinery.

[0051] In step S2, the worker uses a predetermined means such as a crane to transport the mounting member 10 to the top of the installed split pipe 20. Specifically, the worker moves the mounting member 10 so that the mounting portion 13 of the mounting member 10 and the mounted portion 26 of the split pipe 20 are close to each other.

[0052] In step S3, the worker uses a crane or other appropriate means to rotate the mounting member 10 and butt it onto the split pipe 20. Alternatively, as described above, the mounting member 10 may be butted against the split pipe 20 in advance, and then the mounting member 10 may be rotated relative to the split pipe 20.

[0053] In step S4, the worker uses a crane or the like to rotate the mounting member 10 by a certain angle around the cylindrical axis relative to the split pipe 20, thereby fixing the mounting member 10 to the split pipe 20.

[0054] (Various Aspects of the Attachment Mechanism) Next, various aspects of the attachment mechanism (attachment portion 13 and attached portion 26) according to the embodiment will be described with reference to Figures 10 to 14. Here, the description will be given on the assumption that the attachment member 10 is made of metal or the like. More specifically, the description will be given on the assumption that the attachment member 10 and the split pipe 20 are rotated relative to each other to join the attachment portion 13 and the attached portion 26.

[0055] 10 shows a sliding type mounting mechanism (mounting portion 13 and mounted portion 26). Specifically, the mounting portion 13 and the mounted portion 26 each have a notch that engages with each other. In the sliding type, when the mounting portion 13 and the mounted portion 26 are joined, the notches come into close contact with each other, restricting vertical movement of the mounting member 10 relative to the split pipe 20. In other words, the close contact of the notches prevents the mounting member 10 from being accidentally pulled out of the split pipe 20.

[0056] When joining the mounting part 13 and the mounted part 26 using the sliding method, as shown in Figure 11, first, the mounting part 13 and the mounted part 26 are joined together, and then the mounting member 10 is slid downward relative to the split pipe 20. The mounting member 10 is then rotated (slid) around the cylindrical axis to align the notches and completely join the mounting part 13 and the mounted part 26.

[0057] In the sliding type, the right side of the mounting portion 13 is formed with a small diameter at the cutout portion so that it fits inside the right side of the split pipe 20, and the left side of the split pipe 20 is formed with a small diameter so that it fits inside the left side of the mounting member 10. Specifically, as shown in FIG. 11 , the engaging portion 13A of the mounting portion 13 fits into the groove 26B of the mount receiving portion 26, and the engaging portion 26A of the mount receiving portion 26 fits into the groove 13B of the mounting portion 13. The engagement of the cutouts restricts vertical movement of the mounting portion 13 relative to the split pipe 20, and the fit of the mounting portion 13 and the mount receiving portion 26 completely fixes their positions relative to each other. In other words, the engagement of the cutouts in the mounting mechanism restricts the mounting member 10 and the split pipe 20 from separating. Here, the engaging portions 13A and 26A may be press-fitted into the grooves 13B and 26B.

[0058] A modified example of the sliding structure is shown in Figure 12. As shown in Figure 12, the diameter of the mounting portion 13 may be smaller than the diameter of the split pipe 20, and a protrusion 13D provided on the mounting portion 13 may fit into a groove 26D of the mounted portion 26. Alternatively, a protrusion may be provided on the mounted portion 26, and a groove into which the protrusion fits may be provided on the mounting portion 13.

[0059] FIG. 13 shows a screw-type attachment mechanism. Specifically, the attachment portion 13 has a male thread, and the attached portion 26 has a female thread. That is, both the attachment portion 13 and the attached portion 26 are threaded. To join the attachment portion 13 and the attached portion 26 using the screw-type attachment, the attachment portion 13 is rotated while the attachment portion 13 and the attached portion 26 are butted together, and the attachment portion 13 is fitted into the attached portion 26. Further rotation of the attachment member 10 causes the threads to thread together. This joins the attachment portion 13 and the attached portion 26, and secures the attachment member 10 to the split pipe 20. This prevents the attachment member 10 from being accidentally pulled out of the split pipe 20. In this way, the attachment mechanism prevents the attachment member 10 and the split pipe 20 from separating by threading together the threads. Note that, conversely, the attachment portion 26 may have a male thread and the attachment portion 13 has a female thread.

[0060] 14 shows a button-type attachment mechanism. Specifically, a push-button is provided on the attachment receiving portion 26, and a hole corresponding to the button is formed in the attachment portion 13. In the button-type attachment, the button is inserted into the hole, and the attachment portion 13 and attachment receiving portion 26 are joined so that the button engages with the hole, thereby fixing the attachment member 10 to the split pipe 20. In this manner, the attachment mechanism prevents the attachment member 10 and the split pipe 20 from separating by engaging the button with the hole. Note that the opposite arrangement may be adopted, in which a push-button is provided on the attachment receiving portion 13, and a hole corresponding to the button is formed in the attachment receiving portion 26.

[0061] When joining the attachment part 13 and the attached part 26 using the button, the attachment member 10 is rotated while fitting it into the split pipe 20, aligning the position of the button with the position of the hole. Then, by shifting the attachment member 10 downward relative to the split pipe 20, the button enters the hole, joining the attachment part 13 and the attached part 26 and fixing the attachment member 10 to the split pipe 20.

[0062] The disclosed junction poles can be applied to the communications industry.

[0063] 10: Mounting member 11: Cylindrical portion 11A: Tapered portion 12, 12A: Guide tapered portion 13: Mounting portion 13A: Engaging portion 13B: Groove 13D: Protrusion 20: Split pipe 20U: Upper pipe 20M: Intermediate pipe 20L: Lower pipe 21, 21A: First cylindrical portion 22: Second cylindrical portion 22A: Tapered portion 23, 23A: Abutting tapered portion 24A: Tapered portion 25A: Third cylindrical portion 26: Mounted portion 26A: Engaging portion 26B, 23D: Groove 100: Interlocking extension column 300: Heavy machinery

Claims

1. An attachment member that can be attached to one end of each tube of a connecting column made up of multiple tubes formed in a cylindrical shape, and that has a guide tapered portion that reduces in diameter in a predetermined direction and has an outer diameter that can be accommodated in the other end of each of the tubes.

2. A connecting column formed by fitting together a plurality of pipes each having a cylindrical shape and at least one of which is fitted with the mounting member described in claim 1, wherein a contact tapered section is formed at one end of each of the pipes, separate from the section where the mounting member is fitted, to come into contact with the other end of another pipe.

3. A joint column as described in claim 2, wherein the taper rate of the guide taper portion is configured to be greater than the taper rate of the abutment taper portion.

4. A method for constructing a connecting column, comprising: attaching an attachment member to at least one end of each of the pipes of a connecting column consisting of a plurality of pipes formed into a cylindrical shape, the attachment member having a guide tapered portion that reduces in diameter in a predetermined direction and has an outer diameter that can be accommodated in the other end of each of the pipes; and engaging the pipes together to accommodate the attachment member.

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