Spliced pole comprising joint part for joining upper pipe and lower pipe

Abstract

A spliced pole 100 according to the present disclosure functions as an electric pole by joining an upper pipe 10 and a lower pipe 11, and includes a joint part for fixing the upper pipe 10 to the lower pipe 11 by rotating the upper pipe 10 around a cylindrical center axis with respect to the lower pipe 11.

Description

A joint column with a joint that joins the upper pipe and the lower pipe

[0001] The present disclosure relates to a joint column having a joint portion that joins an upper pipe and a lower pipe with a simple structure.

[0002] Conventionally, a junction pole has been known in which an upper pipe and a lower pipe are joined together to be treated like a single utility pole. As typical methods for joining the upper pipe and the lower pipe of such a junction pole, a fitting-type joining method (see Non-Patent Document 1) and a flange-type joining method (see Non-Patent Document 2) are known.

[0003] In the interlocking method, the upper and lower pipes are joined by fitting the upper pipe into the lower pipe. In the flange method, the upper and lower pipes are joined by fastening a disk part that protrudes to the side from a cylindrical member with a bolt.

[0004] Nippon Steel Construction Materials Corporation, website [online], [searched May 31, 2024], Internet <URL: https: / / www.ns-kenzai.co.jp / hltubular-c.html>; Nippon Concrete Industries Co., Ltd., Flange Joint Pole Bolted Joint Work Instructions, [online], November 2018, [searched May 31, 2024], Internet <URL: https: / / www.ncic.co.jp / products / pole / pdf / FCP_FHP_spec.pdf>

[0005] However, with the interlocking type joint column connection method, there is a possibility that the upper pipe and the lower pipe may separate when the joined joint column is removed using a crane, etc. Also, with the flange type joint column connection method, as mentioned above, a bolting process is required.

[0006] Therefore, an object of the present disclosure is to provide a connecting pillar that can be easily joined and removed as a whole without separation.

[0007] In order to achieve the above object, the extension column of the present disclosure employs a technique in which the upper tube and the lower tube are fixed by rotating them relative to each other.

[0008] Specifically, the connecting pole of the present disclosure is a connecting pole that functions as a utility pole by joining an upper pipe and a lower pipe, and has a joint that fixes either the upper pipe or the lower pipe to the other by rotating either the upper pipe or the lower pipe relative to the other about a cylindrical axis.

[0009] The joint may comprise an upper pipe joint provided at one end of the upper pipe, and a lower pipe joint provided at one end of the lower pipe, and the joint may be configured to fix either the upper pipe or the lower pipe to the other of the upper pipe or the lower pipe by rotating either the upper pipe or the lower pipe about a cylindrical axis relative to the other of the upper pipe or the lower pipe, with either the upper pipe joint or the lower pipe joint fitted into the other of the upper pipe joint or the lower pipe joint.

[0010] In addition, each of the upper pipe joint portion and the lower pipe joint portion may be provided with a notch that engages with each other, and the joint portion may prevent the upper pipe and the lower pipe from separating by engaging the notch.

[0011] In addition, the joint may be configured to bring one end of the upper pipe and one end of the lower pipe close together while rotating either the upper pipe or the lower pipe relative to the other, and to fit either the upper pipe joint or the lower pipe joint into the other of the upper pipe joint or the lower pipe joint.

[0012] Furthermore, threads may be formed at the upper pipe joint portion and the lower pipe joint portion, and the joint portion may prevent the upper pipe and the lower pipe from separating by threading the threads together.

[0013] In addition, a hole may be provided in either the upper pipe joint or the lower pipe joint, and a button that engages with the hole may be provided in the other of the upper pipe joint or the lower pipe joint, and the joint may prevent the upper pipe and the lower pipe from separating by the button engaging with the hole.

[0014] The above disclosures can be combined as much as possible.

[0015] The extension columns of the present disclosure can be easily joined and removed as a unit without separation.

[0016] 1 is a diagram illustrating the configuration of a rotary extension pole according to an embodiment of the present disclosure; FIG. 2 is a diagram illustrating a structure in which an upper pipe can be fitted into a lower pipe while being rotated relative to the lower pipe; FIG. 3 is a diagram illustrating a structure in which an upper pipe is fixed to a lower pipe by rotating the upper pipe relative to the lower pipe by a certain angle; FIG. 4 is a diagram illustrating that a extension pole in which the upper pipe and the lower pipe are joined can be pulled out in the same way as a single utility pole; FIG. 5 is a flowchart illustrating the construction flow of a rotary extension pole according to an embodiment of the present disclosure; FIG. 6 is a diagram illustrating an example in which a notch is provided in a joint; FIG. 7 is a diagram illustrating an example in which a notch is provided in a joint; FIG. 8 is a diagram illustrating an example in which a screw is provided in a joint; FIG. 9 is a diagram illustrating an interlocking extension pole; FIG. 10 is a diagram illustrating a flange-type extension pole; FIG. 11 is a table illustrating the effects of a rotary extension pole according to an embodiment of the present disclosure.

[0017] 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.

[0018] (Configuration of the Extension Pole) The configuration of the extension pole 100 according to the embodiment will be described with reference to FIG. 1 . The extension pole 100 includes a substantially cylindrical upper pipe 10 and a substantially cylindrical lower pipe 11. In the extension pole 100, the upper pipe 10 is fitted into the lower pipe 11, and the upper pipe 10 and the lower pipe 11 are fixed (locked) to each other by rotating them relative to each other. In this manner, with the upper pipe 10 fixed to the lower pipe 11, the extension pole 10 functions similarly to a single utility pole. In other words, the extension pole 100 functions as a utility pole by joining the upper pipe 10 and the lower pipe 11. Note that the following description will be given on the assumption that the upper pipe 10 and the lower pipe 11 are arranged so that the up-down direction in the figure coincides with the extension direction of the upper pipe 10 and the lower pipe 11.

[0019] Specifically, the upper pipe 10 is tapered and has an upper pipe joint 10A at its lower end. The lower pipe 11 is tapered and has a lower pipe joint 11A at its upper end. That is, the upper pipe joint 10A is provided at one end of the upper pipe 10, and the lower pipe joint 11A is provided at one end of the lower pipe 11.

[0020] When fitting the upper pipe 10 into the lower pipe 11, the upper pipe 10 is rotated relative to the lower pipe 11 using a predetermined method such as a crane, while being moved toward the lower pipe 11 from above, so that the upper pipe joint 10A and the lower pipe joint 11A butt against each other. After fitting the upper pipe 10 into the lower pipe 11 in this manner, the upper pipe 10 is rotated relative to the lower pipe 11 about its cylindrical axis, thereby joining the upper pipe joint 10A and the lower pipe joint 11A and fixing the upper pipe 10 to the lower pipe 11. In other words, the upper pipe joint 10A and the lower pipe joint 11A function as a joint for fixing the upper pipe 10 to the lower pipe 11. In this embodiment, the joint fixes the upper pipe 10 to the lower pipe 11 by rotating the upper pipe 10 relative to the lower pipe 11 about its cylindrical axis.

[0021] In this manner, the joint fixes the upper pipe 10 to the lower pipe 11 by rotating the upper pipe 10 around the cylindrical axis relative to the lower pipe 11 with the upper pipe joint 10A fitted into the lower pipe joint 11A.

[0022] In addition, the joint is configured so that one end of the upper pipe 10 and one end of the lower pipe 11 are brought close together while the upper pipe 10 is rotated relative to the lower pipe 11, and the upper pipe joint 10A is fitted into the lower pipe joint 11A.

[0023] Although the above description is directed to a case in which the upper pipe 10 is rotated relative to the lower pipe 11, it is sufficient that the upper pipe 10 and the lower pipe 11 are rotated relative to each other, and the lower pipe 11 may be configured to rotate relative to the upper pipe 10. In other words, the joint may be fixed to the lower pipe 11 by rotating the upper pipe 10 about the cylindrical axis relative to the lower pipe 11. Furthermore, the above description is directed to a case in which the upper pipe 10 (upper pipe joint 10A) is fitted into the lower pipe 11 (lower pipe joint 11A). Conversely, the lower pipe 11 (lower pipe joint 11A) may be fitted into the upper pipe 10 (upper pipe joint 10A). Furthermore, the above description is directed to a case in which the upper pipe joint 10A and the lower pipe joint 11A are fitted together while being rotated relative to each other. However, the upper pipe 10 may start rotating relative to the lower pipe 11 after the upper pipe joint 10A is fitted into the lower pipe joint 11A.

[0024] (Various structures and functions of the extension pole) Next, various structures and functions of the extension pole 100 according to the embodiment will be described with reference to Figures 2 to 4. Figures 2 to 4 are diagrams illustrating various structures and functions of the rotary extension pole 100 according to the embodiment of the present disclosure. The joint of the extension pole 100 has a rotary locking structure consisting of an upper pipe joint 10A and a lower pipe joint 11A. As a result, the extension pole 100 in a state in which the upper pipe 10 is fixed to the lower pipe 11 has the same structural performance and lifting performance as a single utility pole. Note that the material and size of the extension pole 100 (utility pole) after joining are the same as those of a conventional utility pole.

[0025] 2 is a diagram illustrating a structure in which the upper pipe 10 can be fitted into the lower pipe 11 while being rotated. In this embodiment, the upper pipe joint 10A can be fitted into the lower pipe joint 11A while rotating the upper pipe 10 relative to the lower pipe 11. Note that, as described above, the rotation of the upper pipe 10 relative to the lower pipe 11 may be started after the upper pipe joint 10A is fitted into the lower pipe joint 11A.

[0026] 3 is a diagram illustrating a structure in which the upper tube 10 is fixed to the lower tube 11 by rotating the upper tube 10 by a certain angle relative to the lower tube 11. By rotating the upper tube 10 by a certain degree about the cylindrical axis relative to the lower tube 11, the upper tube 10 and the lower tube 11 are fixed so as not to move relative to each other.

[0027] FIG. 4 is a diagram illustrating that the extension pole 100, in which the upper pipe 10 (upper pipe joint 10A) and the lower pipe 11 (lower pipe joint 11A) are joined, can be pulled out in the same way as a single utility pole. Here, an example of removing the extension pole 100 using a crane 200 will be described. As described above, the upper pipe 10 and the lower pipe 11 are fixed so that they cannot move relative to each other, so the extension pole 100 can be pulled out and removed in the same way as a single utility pole without separation. In this way, with the extension pole 100 of this embodiment, separation is suppressed even when scaffolding bolts are installed on the upper pipe 10 and it is lifted, and removal can be performed suitably.

[0028] (Construction flow of the extension column) Next, a construction flow of the extension column 100 according to the embodiment will be described with reference to FIG.

[0029] In step S1, a worker installs the down pipe 11 on the ground in a predetermined manner. For example, the worker may install the down pipe 11 on the ground using heavy machinery.

[0030] In step S2, the worker uses a predetermined means such as a crane to transport the upper pipe 10 to the top of the lower pipe 11. Specifically, the worker moves the upper pipe 10 so that the upper pipe joint 10A at the bottom of the upper pipe 10 and the lower pipe joint 11A at the top of the lower pipe 11 are close to each other.

[0031] In step S3, the worker rotates the upper pipe 10 while fitting the upper pipe 10 into the lower pipe 11. Specifically, while rotating the upper pipe 10 relative to the lower pipe 11, the upper pipe joint 10A and the lower pipe joint 11A are butted together, and the upper pipe joint 10A is fitted into the lower pipe joint 11A. Note that, as described above, the upper pipe joint 10A and the lower pipe joint 11A may be butted together in advance, and then the upper pipe joint 10A may be rotated relative to the lower pipe joint 11A.

[0032] In step S4, the worker uses a crane or the like to rotate the upper pipe 10 by a certain angle around the cylindrical axis relative to the lower pipe 11, thereby fixing the upper pipe 10 to the lower pipe 11.

[0033] 6 to 9, various aspects of the joints (upper pipe joint 10A and lower pipe joint 11A) of the connecting column 100 according to the embodiment will be described. The connecting column 100 in this embodiment employs the following method, assuming that the connecting column 100 is a rotation type in which the upper pipe joint 10A and the lower pipe joint 11A are joined by rotating the upper pipe 10 and the lower pipe 11 relative to each other.

[0034] A slide-type joint is shown in Figure 6. Specifically, the upper pipe joint 10A and the lower pipe joint 11A each have a notch that engages with each other. In the slide-type joint, when the upper pipe joint 10A and the lower pipe joint 11A are joined, the notches come into close contact with each other, restricting the relative vertical movement of the upper pipe with respect to the lower pipe. In other words, the close contact of the notches prevents the upper pipe 10 from being accidentally pulled out of the lower pipe 11.

[0035] When joining the upper pipe joint 10A and the lower pipe joint 11A using the sliding method, as shown in Figure 7, first, the upper pipe joint 10A and the lower pipe joint 11A are butted together, and the upper pipe 10 is slid downward relative to the lower pipe 11. Then, the upper pipe 10 is rotated (slid) around the cylindrical axis to align the notch positions and completely join the upper pipe joint 10A and the lower pipe joint 11A.

[0036] In the slide-type joint, the notches are formed with a small diameter so that the right side of the upper pipe 10 fits inside the right side of the lower pipe 11, and the left side of the lower pipe 11 fits inside the left side of the upper pipe 10. Specifically, as shown in FIG. 7 , the engagement portion 10B provided on the upper pipe joint 10A fits into the groove 11C of the lower pipe joint 11A, and the engagement portion 11B provided on the lower pipe joint 11A fits into the groove 10C of the upper pipe joint 10A. The engagement of the notches restricts the relative movement of the upper pipe 10 with respect to the lower pipe 11, and the engagement of the upper pipe 10 and the lower pipe 11 completely fixes their positions relative to each other. In other words, the engagement of the notches restricts the upper pipe 10 and the lower pipe 11 from separating from each other. Here, the engaging portions 10B and 11B may be press-fitted into the grooves 10C and 11C.

[0037] A modified example of the sliding structure is shown in Fig. 8. As shown in Fig. 8, the diameter of the upper pipe 10 may be smaller than the diameter of the lower pipe 11, and a protrusion 10D provided on the upper pipe joint 10A may be fitted into a groove 11D on the lower pipe joint 11A. Alternatively, a protrusion may be provided on the lower pipe joint 11A, and a groove into which the protrusion fits may be provided on the upper pipe joint 10A.

[0038] FIG. 9 shows a threaded joint. Specifically, the upper pipe joint 10A has a male thread, and the lower pipe joint 11A has a female thread. That is, both the upper pipe joint 10A and the lower pipe joint 11A are threaded. When joining the upper pipe joint 10A and the lower pipe joint 11A using the threaded joint, the upper pipe 10A and the lower pipe joint 11A are butted together while rotating the upper pipe 10, and the upper pipe joint 10A is fitted into the lower pipe joint 11A. When the upper pipe 10 is further rotated, the threads engage. This joins the upper pipe joint 10A and the lower pipe joint 11A, and fixes the upper pipe 10 to the lower pipe 11. This prevents the upper pipe 10 from being accidentally pulled out of the lower pipe 11. In this way, the threaded joint prevents the upper pipe 10 and the lower pipe 11 from separating from each other by engaging the threads. Conversely, a male thread may be provided on the lower pipe joint portion 11A and a female thread may be provided on the upper pipe joint portion 11B.

[0039] FIG. 10 shows a button-type joint. Specifically, a push-button is provided at the lower pipe joint 11A, and a hole corresponding to the button is formed in the upper pipe joint 10A. In the button-type joint, the button is inserted into the hole, and the upper pipe joint 10A and the lower pipe joint 11A are joined together so that the button engages with the hole, thereby fixing the upper pipe 10 to the lower pipe 11. In this way, the joint prevents the upper pipe 10 and the lower pipe 11 from separating by engaging the button with the hole. Note that the opposite may be true, where a push-button is provided at the upper pipe joint 10A, and a hole corresponding to the button is formed in the lower pipe joint 11A.

[0040] When joining the upper pipe joint 10A and the lower pipe joint 11A using the button, the upper pipe 10 is rotated while fitting it into the lower pipe 11, aligning the position of the button with the position of the hole. Then, by shifting the upper pipe 10 downward relative to the lower pipe 11, the button fits into the hole, joining the upper pipe joint 10A and the lower pipe joint 11A and fixing the upper pipe 10 to the lower pipe 11.

[0041] (Comparison with Related Joint Columns) Next, the effects of the structure and joining method of the joint column 100 according to the embodiment will be described while comparing it with the structures and joining methods of related joint columns based on Figures 11 to 13. The table in Figure 13 shows the workability of various joining methods.

[0042] A related interlocking type extension column is shown in Figure 11. In the interlocking type, the upper tube is fitted into the lower tube and crimped. In other words, in the interlocking type, the upper tube and the lower tube are not completely fixed in the vertical direction, so there is a possibility that the upper tube and the lower tube may separate when removed, as shown in Figure 13.

[0043] A related flange-type joint column is shown in Figure 12. In the flange type, a disk portion is provided on each of the upper pipe 10 and the lower pipe 11 so as to protrude laterally from a cylindrically formed member. In the flange type, the upper pipe 10 and the lower pipe 11 are joined by fastening the disk portions together with bolts. In other words, the flange type requires a bolting process, which increases the construction time as shown in Figure 13.

[0044] In contrast to the interlocking type, the rotary joining method according to the present disclosure completely fixes the upper pipe 10 and the lower pipe 11 as shown in FIG. 13, so that the pole can be removed in the same way as a single utility pole.

[0045] In contrast to the flange type, the rotary joining method according to the present disclosure allows the upper and lower pipes to be joined by rotation, as shown in Figure 13, thereby reducing construction time. In addition, external materials such as disks and bolts for fastening the upper and lower pipes are not required, making it more economical.

[0046] In this way, the connecting pole according to the present disclosure can be easily joined with less construction time, and can be removed in one piece without separation, just like a single utility pole.

[0047] 10: Upper pipe 10A: Upper pipe joint 11: Lower pipe 11A: Lower pipe joint 10B, 11B: Engagement portion 10C, 11C: Groove 10D: Protrusion 11D: Groove 100: Extension column 200: Crane

Claims

1. A connecting pole that functions as a utility pole by joining an upper pipe and a lower pipe, comprising a joint that fixes either the upper pipe or the lower pipe to the other by rotating either one of the upper pipe or the lower pipe relative to the other around a cylindrical axis.

2. A joint column as described in claim 1, wherein the joint comprises an upper pipe joint provided at one end of the upper pipe and a lower pipe joint provided at one end of the lower pipe, and the joint fixes either the upper pipe or the lower pipe to either the upper pipe or the lower pipe by rotating either the upper pipe or the lower pipe about a cylindrical axis relative to either the upper pipe or the lower pipe with either the upper pipe joint or the lower pipe joint fitted into the other of the upper pipe joint or the lower pipe joint.

3. A joint column as described in claim 2, wherein the upper pipe joint and the lower pipe joint are each provided with a notch that engages with each other, and the joint prevents the upper pipe and the lower pipe from separating by engaging the notches.

4. The joint column described in claim 2, wherein the joint is configured to bring one end of the upper pipe and one end of the lower pipe close together while rotating either the upper pipe or the lower pipe relative to the other, and to fit either the upper pipe joint or the lower pipe joint into the other of the upper pipe joint or the lower pipe joint.

5. A joint column as described in claim 4, wherein threads are formed at the upper pipe joint and the lower pipe joint, and the joint prevents the upper pipe and the lower pipe from separating by threading the threads together.

6. A joint column as described in claim 4, wherein a hole is provided in either the upper pipe joint or the lower pipe joint, and a button that engages with the hole is provided in the other of the upper pipe joint or the lower pipe joint, and the joint restricts the upper pipe and the lower pipe from separating by the button engaging with the hole.

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