JPH04228781A - Erecting structure of self-standing electric light pole and its erecting method - Google Patents

Abstract

PURPOSE:To improve working efficiency for regulating the perpendicularity of a self-standing electric light pole to avoid waste by fixedly installing a collar on the periphery of a foundation pipe fitted in a steel pipe pole, and threadedly engaging a bolt in a tapped hole drilled on an outer periphery at the lower end of the steel pipe pole. CONSTITUTION:The periphery of part somewhat lower than the upper edge of a foundation pipe 1 is fixedly provided with a collar 2, and the lower edge of the pipe 1 is protrusively provided with an excavating edge 6. A locking section is then fixedly provided inside the pipe 1, and an earth auger is coupled with the locking section to rotate the pipe 1. On the other hand, the lower end of a steel pipe pole 3 is inserted into the pipe 1 and locked by the collar 2, and then a bolt 4 is threadedly engaged in the tapped hole of the pole 3 to connect the pipe 1 with the pole 3. Thus the vertical self-standing ability of the pole 3 can be simply and accurately regulated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a self-supporting system that is used to make a self-supporting state robust when a utility pole is made to stand on its own without relying on branch lines or supports. Concerning the pole erection structure of utility poles and the pole erection method.

[Prior art] In recent years, branch lines or supports of utility poles have been installed in urban areas to beautify the environment or to eliminate hindrances to traffic, and in agricultural areas to effectively utilize land and eliminate hindrances to farming due to mechanization. A construction method has been adopted in which the poles are erected on their own to eliminate the problem.

Fig. 4 shows a well-known self-standing construction method for jointed utility poles. A vertical hole is excavated in advance at the construction site using an earth auger, and the screw tip of the earth auger is inserted into the locking part 25a fixed in the inner cavity of the foundation pipe. The foundation pipe 25 is twisted and pushed into the vertical hole by engaging and rotating the earth auger while pushing it down.Then, the utility pole 22 of the first section is loosely fitted into the buried foundation pipe 25, and then The area below the locking part 25a of the foundation pipe 1 is filled with backfilling earth or gravel 26, and the gap between the utility pole 22 and the foundation pipe 25 is filled with gravel 24, the ground surface is hardened with concrete 23, and then the first section The utility pole 21 of the second section is fitted onto the utility pole 22 of the second section.

[Problems to be Solved by the Invention] However, in such a self-supporting pole construction method, the verticality of the utility pole 22 inserted into the foundation pipe 25 is determined by the sand 24 filled in the gap between the utility pole 22 and the foundation pipe 25. There was no choice but to make adjustments depending on the amount, and the work to do so was complicated and labor-intensive.

Furthermore, in the conventional self-supporting pole construction method, it was necessary to bury the utility pole 22 considerably deeply within the foundation pipe 25, resulting in wasted material.

The present invention was made in view of the above circumstances, and provides an improved pole construction structure for free-standing utility poles that increases work efficiency for adjusting the verticality of free-standing utility poles and eliminates wasted material costs. The purpose is to provide a method for constructing pillars.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the pole construction structure of the free-standing utility pole of the present invention is such that the structure of the free-standing utility pole of the present invention is such that the pole is slightly lowered from the upper end of the foundation pipe that is loosely fitted into the steel pipe pole to be erected. At the same time, a collar is fixed to the outer circumference of the steel pipe pole, and bolts are screwed into each of screw holes drilled at at least three equal points on the circumference at a slight interval vertically on the outer circumference near the lower end of the steel pipe pole. It is characterized by the following.

In addition, in the method of constructing a free-standing utility pole of the present invention, a steel pipe pole is loosely fitted from above a foundation pipe buried in the soil, and is latched to a collar fixed on the outer periphery of the foundation pipe, which is slightly lowered from the upper end of the foundation pipe. At the same time, bolts are screwed into each of screw holes drilled at least at three equal points on the circumference with slight intervals vertically on the outer periphery near the bottom of the steel pipe pole, thereby increasing the vertical independence of the steel pipe pole. The present invention is characterized in that each bolt is tightened while being adjusted, and then concrete is filled under the ground surface around the joint between the steel pipe pole and the foundation pipe and fixed.

[Function] With the above configuration, the connection between the steel pipe pole and the foundation pipe is such that the steel pipe pole is connected to the foundation pipe until it is locked to the collar fixed on the outer periphery, which is slightly lowered from the upper end of the foundation pipe buried in the soil. This is done by fitting loosely into the steel pipe pole and bolting it to the outer periphery of the foundation pipe through a screw hole provided on the outer periphery of the steel pipe pole.

Furthermore, by adjusting the tightening of at least three or more bolts on the upper and lower sides from the outer periphery of the loosely fitted portion of the steel pipe pole, the verticality of the steel pipe pole that can stand on the brim of the foundation pipe can be ensured.

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

FIG. 1 is an elevational view showing how a jointed utility pole is erected using the free-standing utility pole erecting structure of the present invention. FIG. 2 is a diagram showing the construction structure of the free-standing utility pole of the present invention. FIG. 2(a) is a partial side view showing the lower end of the steel pipe pole, and FIG. ), FIG. 2(c) is a side view of the foundation pipe, and FIG. 2(d) is a sectional view along line B-B of FIG. 2(c). FIGS. 3(a) to 3(e) are process diagrams showing the pillar erection method of the present invention.

In Figures 1 and 2, reference numeral 1 denotes a foundation pipe, which is formed with a diameter slightly larger than the diameter of the screw blade of the earth auger 9 (see Figure 3 (c)), and is slightly lowered from its upper edge. A collar 2 is fixedly attached to the outer periphery of the collar 2, and a loose fitting part 1a with a steel pipe pole 3, which will be described later, is provided above the collar 2, while a plurality of digging blades 6 are provided downwardly protruding from the lower edge. In addition, a locking part 5 is fixedly provided in the lower part of the inside of the foundation pipe 1, and the locking part 5 is provided with a hole part 5a in the center into which the tip protrusion of the earth auger 9 is inserted.
The tip of the screw digging blade of the earth auger 9 can engage with the locking part 5, and the foundation pipe 1
This is the rotation of the

On the other hand, since the steel pipe pole 3 is formed to have an inner diameter slightly larger than the outer circumference of the base pipe 1, as shown in FIG.
When the lower end of the steel pipe pole 3 (indicated by the two-dot chain line) is inserted from above the foundation pipe 1 as shown in the arrow in FIG. Although it is loosely fitted with a gap around the circumference, the steel pipe pole 3
The lower edge of the steel pipe pole 3 is secured by a collar 2, and bolts 4 are screwed into each of the screw holes 4a that are drilled at three equal points on the circumference at a slight interval vertically on the outer periphery near the bottom of the steel pipe pole 3. By inserting and tightening, the steel pipe pole 3 is connected to the foundation pipe 1.

Therefore, depending on the tightening condition of each bolt 4, the steel pipe pole 3
The perpendicularity of the steel pipe pole 3 to the foundation pipe 1 can be adjusted, and thus the steel pipe pole 3 can be connected to the foundation pipe 1 and the steel pipe pole 3 can be made vertically independent by simple bolt tightening.

Fig. 1 shows a steel pipe pole that is self-erected using the above-mentioned foundation pipe, and the steel pipe pole used as a utility pole is used as a joint utility pole to join two divided steel pipe poles 3 and 6, as shown in the figure. Alternatively, it may be formed from a single steel pipe pole.

Next, the process leading to the completion of the pillar erection in Figure 1 is shown in Figures 3 (a) to 3.
This will be explained with reference to (e).

First, after drilling a mortar-shaped recess 7 in the ground, a vertical hole is formed, which is a long hole slightly longer than the length from the brim 2 to the lower end of the foundation pipe 1, and whose inner diameter is slightly smaller than the outside diameter of the foundation pipe 1. 8 with an earth auger, and then the perforated part 5a of the foundation pipe 1.
Insert the protrusion at the tip of the earth auger 9, engage the screw tip of the earth auger 9 with the locking part 5, and rotate the earth auger 9 while pushing it down to twist the foundation pipe 1 into the vertical hole 8. When the foundation pipe 1 is pushed in twice, the cutting blade 6 of the foundation pipe 1 enters the vertical hole 8 while scraping the peripheral wall thereof, and the contact surface between the foundation pipe 1 and the vertical hole 8 is brought into close contact with the pressure in the soil, and the solid construction of the foundation pipe 1 is strengthened. A pillar is made.

Next, bolts 4 are temporarily fastened to each of the screw holes 4a near the lower end of the steel pipe pole 3, and the steel pipe pole 3 is inserted into the upper loose fitting part 1a of the foundation pipe 1 until it is locked by the collar 2. , While measuring the verticality of the steel pipe pole 3, each bolt 4 is firmly tightened.Finally, a formwork 10 for a mountain stop is provided on the inner wall of the recess 7, and the inner gap is filled with concrete 7a. The joint between the steel pipe pole 3 and the foundation pipe 1 is hardened.

In the above embodiment, the foundation pipe 1 has a structure in which the locking part 5 and the excavation blade 6 are provided so as to be suitable for burying with an earth auger, but the present invention is not limited to this, and the foundation pipe 1 is A foundation pipe may be used in which the head is directly driven into a pre-excavated vertical hole without providing the above-mentioned locking portion 5 and excavation blade 6.

[Effects of the Invention] As described above, according to the pole construction structure and the pole construction method for a free-standing utility pole of the present invention, the connection between the steel pipe pole and the foundation pipe is provided near the lower end of the steel pipe pole, that is, near the ground surface. Since this can be done by tightening bolts, the vertical independence of the steel pipe pole can be easily and accurately adjusted without the need for complicated work such as adjusting the amount of sand packed in the conventional method.

Further, since the steel pipe pole and the foundation pipe are connected only to the loose fitting portion provided above the foundation pipe, this is advantageous in saving materials for the steel pipe pole.

Furthermore, the foundation pipe used as the foundation for erecting the free-standing utility pole is not of the type in which the steel pipe pole is inserted into the inner cavity as in the past, but is of the type in which the steel pipe pole is inserted into the outer periphery of the pipe. The outer diameter of the pipe can be made smaller, making it much easier to screw in the foundation pipe, and the surplus material from the smaller diameter can be used to lengthen the length, but the deeper the ground, the harder the ground becomes. Therefore, sufficient robustness can be ensured without making the pipe so long that it uses all of the excess material, which is beneficial for saving the material of the foundation pipe.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing how a jointed utility pole is erected using the foundation for erecting a self-supporting utility pole of the present invention. FIG. 2 is a diagram showing the construction structure of the free-standing utility pole of the present invention,
Figure 2(a) is a partial view showing the lower end of the steel pipe pole;
Figure (b) is a sectional view taken along the line A-A in Figure 2 (a), and Figure 2 (c).
) is a side view of the foundation pipe, Figure 2 (d) is Figure 2 (c)
FIG. FIGS. 3(a) to 3(e) are process diagrams showing the pillar erection method of the present invention. FIG. 4 is a diagram showing the conventional self-supporting pillar construction method. 1...Foundation pipe, 2...Brim, 3...First section steel pipe, 3
a... Second section steel pipe pole, 4... Bolt, 5... Locking part, 6...
Drilling blade, 7... recess, 7a... concrete, 8... vertical hole, 9
...Earth Ogre.

Claims (2)

[Claims] Claim 1: A collar is fixed on the outer periphery of the foundation pipe that is slightly lowered from the upper end of the foundation pipe that is loosely fitted into the steel pipe pole to be erected, and a collar is fixed on the outer periphery near the lower end of the steel pipe pole slightly vertically. A pole construction structure for a self-supporting utility pole, characterized in that bolts can be screwed into each of screw holes drilled at at least three equal points on the circumference at intervals. Claim 2: A steel pipe pole is loosely fitted from above the foundation pipe buried in the ground and is locked to a collar fixed to the outer periphery of the foundation pipe, which is slightly lowered from the upper end of the foundation pipe, and the steel pipe pole is attached to the bottom of the steel pipe pole. Screw a bolt into each of the screw holes drilled at at least three equal points on the circumference with a slight interval vertically on the nearby outer circumference, and tighten each bolt while adjusting the vertical independence of the steel pipe pole. 1. A method for constructing a self-supporting utility pole, characterized in that, after the steel pipe pole is attached to the base pipe, concrete is filled and fixed under the ground surface around the joint between the steel pipe pole and the foundation pipe.