JPH0748957A - Reinforced steel pipe pole comprising steel pipe connected column with different diameters - Google Patents

Abstract

PURPOSE:To provide a reinforced steel pipe pole comprising a steel pipe- connected column with different diameters which has desirable external appearance, in shape, and in which, when a worker climbs or descends the pole to construct the pole, work efficiency and safety is improved, and connecting work of steel pipes can be performed safely and correctly. CONSTITUTION:Flanges 4, 5 having outer diameter equal to the outer diameter of a large-diameter steel pipe 2 are fixedly attached to the joint ends of the pipe 2 and a small-diameter steel pipe 3 respectively, and a plurality of threaded holes 6 are formed in the flange 4 of the pipe 2 so as to be inclined toward the center of the pipe 2, while a plurality of through holes 7 are formed in the peripheral edge of the flange 5 of the pipe 3 so as to communicate with the holes 6 and to be inclined in a manner similar to the holes 6. By clamping both the flanges 4, 5 by bolts, the upper end of the pipe 2 is connected to the pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to connect a large-diameter and a small-diameter steel pipe for utility poles with different diameters so that an operator can safely and smoothly perform lifting and lowering operations on the utility pole, joining work and other work. The present invention relates to a reinforced steel pipe utility pole composed of different diameter steel pipe joint columns.

[0002]

2. Description of the Related Art Conventionally, concrete poles have been widely used as utility poles for distribution lines, but these concrete poles are heavy and require a great deal of labor for the construction poles, and in transportation and construction. Since it also entails a great deal of danger, in recent years, electric poles made of reinforced steel pipes having high strength and light weight have been used.

By the way, in order to carry a long utility pole on a general road, a permission procedure of the competent government agency is required, and this procedure is very complicated, and a large vehicle is required for the transportation, or a building pole. Because of the need for large equipment,
Since it was impossible to work on the building poles in a narrow space, recently, a pillar-type building column method has been developed, in which the vertical length of the utility pole is divided and these are connected at the site.

FIG. 6 shows the joint structure of the reinforced steel pipe utility pole in such a joint pole. As shown in FIG.
1, the upper side of which is not required to have higher strength is a small-diameter steel pipe 22, a flange 23 having a diameter larger than its outer diameter is fixed to the upper end of the large-diameter steel pipe 21 through a plurality of ribs 224, and the lower end of the small-diameter steel pipe 22 is fixed. A flange 25 having the same diameter as the flange 23 on the large-diameter steel pipe 21 side is fixedly secured to the large-diameter steel pipe 21 via a rib 26. At such a joint end portion of the large-diameter steel pipe 21 and the small-diameter steel pipe 22, the flanges 23 and 25 of the two are fitted. Let me bolt 27
And the nut 28.

[0005]

In such a conventional joint pipe of different diameter steel pipes, the flanges 23 and 25 at the joint ends of the large diameter steel pipe 21 and the small diameter steel pipe 22 are large, and the ribs 24 and 26 are provided. Since it is used as a reinforcing material, a stable connection structure is formed. However, since the flanges 23 and 25 and the ribs 24 and 26 are projected to the outside, this projecting portion is required during overhead wire work. Was a hindrance, hindering the worker from going up and down, making various overhead line work extremely dangerous.

Further, in the electric pole having such a connection structure, the flanges 23 and 25 and the ribs 24 and 26 projecting on the outer periphery have a strange appearance in appearance.
It gave a bad impression on the landscape.

Furthermore, the large-diameter steel pipe side flange 2 described above
3 and the flange 25 on the small diameter steel pipe side are bolted to each other, bolt holes 27a are formed in both flanges 23 and 25. At the time of joining, the two flanges 23 and 25 are aligned with each other. Since the work of aligning 27a is added, the positioning work for the flanges, which is required for the work 27a, must be dependent solely on the judgment of the operator, which is an inefficient element.

The present invention has been made in view of the above circumstances, and an operator is required to construct a reinforced steel pipe utility pole composed of a joint pipe of different diameter steel pipes in which a small diameter steel pipe is joined to a large diameter steel pipe. Reinforced steel pipe utility poles made up of different diameter steel pipe joint poles that improve workability and safety when going up and down to a utility pole, enable safe and appropriate joining work of both steel pipes, and give a favorable appearance in terms of shape Is provided.

[0009]

In order to solve the above-mentioned problems, a reinforced steel pipe electric pole composed of steel pipes with different diameters is constructed by connecting the large diameter steel pipes 2 and the small diameter steel pipes 3 to the large diameter steel pipes. Flanges 4 and 5 having an outer diameter equal to the outer diameter of 2 are fixed, and a plurality of screw holes 6 inclined toward the center of the large diameter steel pipe 2 are formed in the flange 4 of the large diameter steel pipe 2, while the small diameter A plurality of through holes 7 that communicate with the screw holes 6 and are inclined similarly to the screw holes 6 are formed on the periphery of the flange 5 of the steel pipe 3, and both the flanges 4 of the large diameter steel pipe 2 and the small diameter steel pipe 3 are formed. The small-diameter steel pipe 3 is connected to the upper end of the large-diameter steel pipe 2 by bolting 5 to each other.

Further, in the above construction, the large diameter steel pipe 2
On the flange 4 of the large-diameter steel pipe 2, a guide bolt 8 that can be screwed into one of the screw holes 6 formed in the flange 4 is provided, and the guide bolt 8 is screwed into one of the screw holes 6. One of the through holes 7 of the flange 5 of the small-diameter steel pipe 3 is inserted into the head of the guide bolt 8 protruding in the direction of the guide bolt 8 so that the flanges 4 and 5 are aligned with each other and the through holes 7 and the screw holes are aligned with each other. The flanges 4 and 5 may be connected to each other by fastening a bolt 9 to 6 and fastening the bolt 9 instead of the guide bolt 8 at the guide position of the guide bolt 8.

[0011]

According to the above-described structure of the present invention, at the joint end portion of the large diameter steel pipe 2 and the small diameter steel pipe 3, the upper end of the large diameter steel pipe 2 has a flange having an outer diameter equal to the outer diameter of the large diameter steel pipe 2. 4 is fixed, and a flange 5 having the same diameter as the flange 4 is fixed to the lower end of the small diameter steel pipe 3.

In order to connect the small diameter steel pipe 3 to the large diameter steel pipe 2, the flanges 4 and 5 fixed to the steel pipes 2 and 3 are aligned with each other, and at the same time, the through holes 7 and the screw holes 6 are formed. The bolts 9 are communicated with each other, and the bolts 9 are inserted into the respective through holes 7 and screwed into the respective screw holes 6, so that accurate bolt fastening can be performed.

In such bolt fastening, the bolt 9 can be screwed into the screw hole 6 itself formed in the flange 4 of the large-diameter steel pipe 2. It becomes unnecessary, and the work of connecting both flanges 4 and 5 can be completed only by the work of tightening the bolt 9.

Further, in the work of connecting both the flanges 4 and 5, one of the plurality of screw holes 6 formed in the flange 4 of the large diameter steel pipe 2 is arbitrarily selected and the guide bolt 8 is screwed into the guide hole 8 to guide it. The head of the bolt 8 is projected onto the flange 4 of the large-diameter steel pipe 2, and one of the through holes 7 of the flange 5 of the small-diameter steel pipe 3 is inserted into the head of the guide bolt 8 so that the guide bolt 8 serves as a fulcrum. The flange 5 of the small-diameter steel pipe 3 can be matched with the flange 5 of the large-diameter steel pipe 2, whereby at the same time when the alignment of both the flanges 4 and 5 is completed, the corresponding through holes 7 and screw holes 6 are fitted with bolts 9. By performing a quick fastening operation and then fastening the bolt 9 in place of the guide bolt 8 described above, it is possible to perform an accurate coupling.

At the joint of the large-diameter steel pipe 2 and the small-diameter steel pipe 3 in the present invention, all the members such as the flanges 4 and 5 and the small-diameter steel pipe 3 are accommodated within the outer diameter of the large-diameter steel pipe 2. Nothing protrudes outward from the outer periphery of the large diameter steel pipe 2, and it can have a shape with an excellent appearance.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial side view showing a joint end portion of a reinforced steel pipe electric pole composed of different diameter steel pipe joint columns according to the present invention. Figure 2
FIG. 2 is a vertical cross-sectional view of the screw hole and the through hole of FIG. FIG. 3 is a side view of the guide bolt used in the present invention. FIG. 4 is a side view showing the connecting action of a large diameter steel pipe and a small diameter steel pipe using the guide bolt of FIG. FIG. 5 is a side view showing a state of a building pole of a reinforced steel pipe utility pole composed of a steel pipe splice column of different diameter according to the present invention.

FIG. 1 shows a state in which a small-diameter steel pipe 3 is connected to the upper end of a large-diameter steel pipe 2 on the side to be buried in soil.
As shown in FIG. 2, a flange 4 having an outer diameter equal to the outer diameter of the large diameter steel pipe 2 is welded to the upper end of the large diameter steel pipe 2, and the outer diameter of the flange 4 of the large diameter steel pipe 2 is the same as the outer diameter of the flange 4 of the small diameter steel pipe 3. The flange 5 having the above is welded and joined.

However, as shown in FIG. 2, the two flanges 4 and 5 take into consideration the joint strength to the steel pipes 2 and 3,
The flange 4 has a protruding pipe portion 4 that fits within the inner diameter of the large diameter steel pipe 2.
a is integrally formed, and the flange 5 is integrally formed with a protruding pipe portion 5a that fits into the inner diameter of the small-diameter steel pipe 3, and when the flanges 4 and 5 are fixed to the steel pipes 2 and 3, respectively. In this case, the respective projecting pipe portions 4a and 5a are fitted into the inner circumferences of the steel pipes 2 and 3 and welded as described above.

As shown in FIG. 2, the flange 4 of the large diameter steel pipe 2 is formed with a plurality of screw holes 6 inclined toward the center of the large diameter steel pipe 2, and the bolt 9 and the bolt 9 shown in FIG. Figure 3
While the guide bolt 8 shown in FIG. 4 can be screwed, the flange 5 of the small-diameter steel pipe 3 is communicated with the screw hole 6 on the large-diameter steel pipe 2 side when the both flanges 4 and 5 are aligned with each other. A plurality of through holes 7 having the same inclination as is formed.

This through hole 7 is formed by the bolt 9 of FIG.
The guide bolt 8 has an inner diameter that allows the guide bolt 8 to be inserted with a slight clearance.

The flange 5 of the small-diameter steel pipe 3 is provided with an inclined surface 5b at its upper edge so that the upper end of the above-mentioned through hole 7 penetrates the inclined surface 5b. When tightening, the lower end surface of the head of the bolt 9 evenly contacts the inclined surface 5b, and the inclined surface 5b.
By forming the above, the connection strength between the projecting pipe portion 5a and the flange 5 is maintained, and it is possible to retain the strength against the side surface of the small diameter steel pipe 3 against wind pressure or rolling during vibration.

Similarly, an inclined surface 4b is also formed on the inner lower edge of the flange 4 of the large-diameter steel pipe 2 to retain the connecting strength between the protruding pipe portion 4a and the flange 4.

The guide bolt 8 shown in FIG. 3 is provided with a male screw portion 8a having a thread groove formed on the outer periphery and a guide portion 8b having a non-threaded portion on the upper side and having a diameter that is tapered from one end thereof. Further, a square head portion 8c that allows a spanner to be hung is formed at the tip thereof. The male screw portion 8a can be screwed into the screw hole 6 provided in the flange 4 of the large diameter steel pipe 2, and is inserted into the through hole 7 of the flange 5 of the small diameter steel pipe 3 with a minute gap. Is done.

In order to join the different-diameter steel pipe joint columns composed of the large-diameter steel pipe 2 and the small-diameter steel pipe 3 as described above, the flange 4 is fixed to the upper end of the large-diameter steel pipe 2 in advance and the lower end of the small-diameter steel pipe 3 is joined. The one to which the flange 5 is fixed is transported to the site, and the lower end of the large diameter steel pipe 2 is first buried in the soil to make it stand by itself.

Then, as shown in FIG. 4, one of the plurality of screw holes 6 formed in the flange 4 of the large-diameter steel pipe 2 is arbitrarily selected, and the male screw portion 8a of the guide bolt 8 is screwed to guide it. The portion 8b is projected on the flange 4.

Next, the flange 5 of the small-diameter steel pipe 3 is made to face downward, and one of the through holes 7 of the flange 5 is inserted into the upper part of the guide bolt 8, and at this time, the guide portion 8 of the guide bolt 8 is inserted.
The small-diameter shape of b facilitates insertion into the through hole 7 and makes the end surfaces of both flanges 4 and 5 coincide with each other, and at the same time, other screw holes 6 and through holes 7 except the screwing position of the guide bolt 8 are formed. The bolts 9 are screwed into the positions where they match.

However, at this time, the guide bolt 8 is left in a state in which a part of the guide portion 8b is projected from one through hole 7 of the flange 5, and the corner head portion 8c is rotated by a spanner or the like so that the guide bolt 8 can be rotated. 8 is removed and then bolts 9 similar to those used elsewhere are tightened to complete the connection of the flanges 4 and 5.

As shown in FIG. 5, the different-diameter steel pipe joint column which has completed such a connection has no flanges or ribs protruding from the outer periphery of the large-diameter steel pipe 2 on the soil side, and has an overall shape. Thus, a reinforced steel pipe utility pole having no protruding portion on the outer periphery can be obtained.

[0030]

As described above, the reinforced steel pipe utility poles of the different diameter steel pipe joint columns of the present invention have the flanges 4 and 5 fixed to the steel pipes 2 and 3 respectively without using the conventional ribbed flanges. Both steel pipes can be joined together by bolt fastening, and the bolt joining work only requires screwing the bolts without using nuts, and there is nothing externally protruding outside the outer circumference of the large diameter steel pipe 2. Therefore, the work of raising and lowering the worker is not hindered, the connecting work is facilitated, the workability of the overhead wire is extremely efficient, and the life risk to the worker can be drastically reduced.

When aligning the flanges 4 and 5,
By using the guide bolt 8 screwed into one of the screw holes 6 formed in the flange 4 of the large-diameter steel pipe 2 as the guide means, it is possible to easily align the flanges 4 and 5. At the same time, each through hole 7 and screw hole 6
Therefore, a smooth bolt fastening work can be performed.

Further, in the reinforced steel pipe utility pole composed of the different diameter steel pipe joint columns of the present invention, the outer diameters of both flanges 4 and 5 are equal to the outer diameter of the large diameter steel pipe 2, and the small diameter steel pipe 3 is connected to the upper end thereof. Therefore, the entire outer shape is a cylindrical shape with no protrusions, and the appearance of the utility pole is excellent in appearance.

[Brief description of drawings]

FIG. 1 is a partial side view showing a joint end portion of a reinforced steel pipe electric pole made of a steel pipe joint pipe of different diameter according to the present invention.

FIG. 2 is a vertical cross-sectional view of the screw hole and the through hole of FIG.

FIG. 3 is a side view of a guide bolt used in the present invention.

FIG. 4 is a side view showing a connecting action between a large diameter steel pipe and a small diameter steel pipe using the guide bolt of FIG.

FIG. 5 is a side view showing a state of a building pole of a reinforced steel pipe electric pole composed of a steel pipe joint column with different diameter steel pipes according to the present invention.

FIG. 6 is a partial side view showing a joint end portion of a conventional different diameter steel pipe joint column.

[Explanation of sign]

2 ... Large diameter steel pipe, 3 ... Small diameter steel pipe, 4 ... Large diameter steel pipe side flange, 4a ... Large diameter steel pipe side protruding pipe portion, 4b ... Large diameter steel pipe side flange inclined portion, 5 ... Small diameter steel pipe side flange 5a ...
Small-diameter steel pipe-side protruding pipe portion, 5b ... Inclined portion of small-diameter steel pipe-side flange, 6 ... Screw hole, 7 ... Through hole, 8 ... Guide bolt,
8a ... Male screw part, 8b ... Guide part, 8c ... Square head part, 9 ... Bolt, 10 ... Nut.

Claims (2)

[Claims] 1. A flange 4 having an outer diameter equal to the outer diameter of the large-diameter steel pipe 2, at each of the joint ends of the large-diameter steel pipe 2 and the small-diameter steel pipe 3.
5 are fixed, and a plurality of screw holes 6 are formed in the flange 4 of the large diameter steel pipe 2 so as to be inclined toward the center of the large diameter steel pipe 2, while the screw holes are formed in the periphery of the flange 5 of the small diameter steel pipe 3. 6 and a plurality of through holes 7 that are inclined similarly to the screw holes 6 are formed, and both flanges 4 and 5 of the large diameter steel pipe 2 and the small diameter steel pipe 3 are bolted to each other so that the large diameter steel pipe 2 A reinforced steel pipe utility pole comprising a different diameter steel pipe joint pole, characterized in that the small diameter steel pipe 3 is connected to the upper end of the. 2. The different diameter steel pipe joint column according to claim 1, further comprising a guide bolt 8 which is screwed into one of screw holes 6 formed in the flange 4 of the large diameter steel pipe 2. Reinforced steel pipe utility pole.