JPH03260224A - Pole supporter - Google Patents

Abstract

PURPOSE:To permit a pole to be constructed even in narrow or small spaces without use of stay or support column by strongly supporting the pole by using a supporter having a hole to be fitted with the lower part of a pole and expanded parts on its peripheral side. CONSTITUTION:The ground is excavated to form a pole-setting place, and an anchor part 4 integrated with expanded parts 4a of spiral fins which are formed on the peripheral side of a fiber-reinforced concrete body is hung down and buried vertically in the pole-setting place. A supporter 2 having a pole-fitting hole 2a and expanded parts 2c similar to those of the anchor part 4, which are made of the same material as the anchor part 4, is hung down to the anchor part 4. The fitting part 2e of the supporter 2 is fitted on the upper part of the anchor part 4, and cement mortar 8 is injected to the fitting part 2e and embedded with soil. The lower part of a steel tubular pole 3 is inserted into the hole 2a to the upside of the bottom 2g to construct the pole.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a support device for firmly erecting utility poles on the ground.

(Prior Art) For example, when constructing a utility pole that receives a large lateral load from electric wires, such as a utility pole for holding down electric wires, supports and branch wires are used to counteract the lateral load.

However, in recent years, in urban areas and suburban agricultural areas where effective use of land and aesthetics are a priority, it has become necessary to reduce the installation space for utility poles as much as possible, making it difficult to install these poles and branch lines.

When attempting to erect a utility pole firmly in a small space under the environment described in 2 above, it is necessary to increase the depth of embedding the utility pole, or as shown in Figure 7 (a) and (b), By inserting a root repellent board B and a root retaining board C at the lower end of the pole, an attempt is made to increase the supporting force of the ground against the lateral load acting on the utility pole A.

(Problem to be solved by the invention) However, when constructing utility poles using these root-repelling boards B and root-clamping boards C, a large surface pressure acts on the ground immediately adjacent to the utility pole A, so this surface pressure It is necessary to carefully backfill in order to counteract this, and this work in particular has a large effect on the supporting capacity of utility pole A, depending on the skill of the worker.

Even if these root repellent boards B and root latching boards C are used, the inclination of utility pole A (angle α in Fig. 7(a)) and the displacement around the axis of overhead wire arm E (Fig. 7(b)) It is quite difficult to prevent the occurrence of angle β).

This invention was made based on this background, and although the installation space for the utility pole is small, the installation work of the utility pole is relatively simple and the influence of the worker's skill is small, and at the same time, the installation of the utility pole is easy. The purpose is to improve supporting capacity.

(Means for Solving the Problems) In order to achieve this object, the present invention consists of a molded body having a hole into which the lower part of a telephone pole is fitted, and a molded body having an outer peripheral surface in a radial direction of the hole. A projecting portion extending outward is formed.

(Function) According to this invention, a hole into which the lower part of the telephone pole fits is formed in the molded body, so that the pole is firmly supported by the molded body by inserting the lower part into the molded body, and a large surface pressure is applied to the pole. Since it is possible to avoid backfilling the area immediately adjacent to the utility pole, the work is relatively simple and the influence of the worker's skill on the supporting capacity can be reduced.

Since an overhang extending outward in the radial direction of the hole is formed on the outer circumferential surface of this molded body, the lateral load of the utility pole is counteracted by a wide area of the ground due to this overhang, and the surface acting on this area is Since the pressure is reduced, the molded body is firmly supported on the ground.

Therefore, the utility pole can be firmly supported without using branch wires or supports, so the utility pole can be erected in a small space.

(Example) This invention will be explained below with reference to an example shown in the drawings.
First, a first embodiment will be described with reference to FIGS. 1 to 4.

In FIG. 1, 1 is the ground, 2 is a support device, and 3 is a utility pole.

The support device 2 is buried underground, and the lower part of the steel pipe utility pole 3 is inserted into a utility pole mounting hole 2a (corresponding to the hole of the present invention) formed vertically in the center of the support device 2. A utility pole 3 is erected, and a reel member 4 is buried directly under the support device 2, and the support device 2 is integrally fixed to the anchor member 4.

The support device 2 is made of a molded body of fiber-reinforced concrete, and as shown in FIG.
A main body part 2b is formed into a substantially bottomed shape to have a substantially cylindrical shape, and a main body part 2b is formed into a substantially cylindrical shape with a bottom, and on the outer circumferential surface of the main body part 2b, a main body part 2b extends in a radial direction from the center of the vertical axis of the utility pole mounting hole 2a. The portion 2c is extended and integrally molded.

Note that the overhanging portion 2C in the support device 2 of this embodiment
consists of four spiral fins wound in the right-handed direction.

In the upper part of the utility pole mounting hole 2a of this support device 2,
A keyway 2d is formed, and a key 3a welded to the lower part of the steel pipe utility pole 3 is located in this keyway 2d.

Further, a fitting portion 2e (corresponding to the connecting means of the present invention) is formed as a downwardly opening recess on the lower surface of the support device 2, and the fitting portion 2e is provided with an anchor as described later. The upper part of the member 4 can be inserted, and a bottom part 2g having a communication hole 2f is formed between the utility pole mounting hole 2a and this fitting part 2e.

The anchor member 4 is molded from fiber-reinforced concrete similarly to the support device 2, and has an integrally formed projecting portion 4a extending laterally on its circumferential surface, and this projecting portion 4a has a spiral shape. The point that it is formed as a shaped fin is similar to the overhanging part 2C of the support device 2, but
The winding direction is reversed, and four fins are formed in the left-hand thread direction.The lower part of the anchor member 4 has a tapered tapered end portion for convenience in vertically correcting its posture when buried underground. 4b, the upper end of the anchor member 4 is formed to a diameter that allows it to be inserted into the fitting portion 2e of the support device 2, and a groove 4C is formed in the upper end surface.

The work of erecting a utility pole 3 using such a support device 2 and anchor member 4 will be explained mainly with reference to FIGS. 4(a) to 4(d).

First, a hole is dug in a predetermined shape at the position of the utility pole 3 using an excavator 5 or the like (FIG. 4(a)).

Next, the reed force member 4 is lowered by a crane 6 or the like,
Backfilling is performed while correcting the posture of the anchor member 4 so that it is as vertical as possible (Fig. 4(b)).
At this time, if the reed force member 4 is rotated to the right while applying a downward force, the reed force member 4 is stabilized and backfilling is performed efficiently.

After that, the support device 2 is similarly lowered by a crane 6 or the like, in this case, the fitting part 2e formed on the lower surface of the support device 2 fits into the upper part of the anchor member 4, and is in a vertical position. (Figure 4 (C))
In this case, as in the case of the anchor member 4, backfilling can be efficiently performed by rotating the support device 2 counterclockwise while applying a downward force to the support device 2.

When the support device 2 is fitted into a predetermined vertical position, the area around the support device 2 is backfilled.

In this way, the anchor member 4 and the support device 2 are separated and backfilled one after another, so the backfilling work is relatively easy.

Thereafter, after inserting a key (not shown) between the anchor member 4 and the support device 2, mortar 8 is injected into the fitting part 2e through the communication hole 2f using a funnel 7 or the like ( Figure 4(d)).

This mortar 8 fills the fitting portion 2e and also enters the groove 4c of the anchor member 4.

By hardening this mortar 8, the anchor member 4
is integrated with the support device 2, and the supporting force of the utility pole 3 supported by the support device 2 is increased.

The lower part of the steel pipe utility pole 3 is inserted into the utility pole attachment hole 2a of the support device 2 embedded in the ground up to the top surface of the bottom 2g. At this time, the key fixed to the utility pole 3 is inserted. Insert the key into the key groove to complete the installation of the utility pole (see Figure 1).

In addition, in the figure, 9 is an overhead wire arm, and 11 is an electric wire.

In the second embodiment, the anchor member 4 is attached to the support device 2.
Since the supporting device 2 is formed separately from the utility pole 3 and integrated at the site where the utility pole 3 is erected, the supporting device 2 itself is lightweight and easy to handle, and can generate a high supporting force.

Furthermore, since the projecting portions 2c and 4a of the support device 2 and the anchor member 4 of this embodiment are formed as spiral fins with opposite screw directions, the rotational displacement around the axis of the utility pole 3 after the mortar 8 has hardened This has the advantage of increasing the force that resists the rotational moment that occurs.

In order to erect the utility pole 3 according to this embodiment, it is sufficient to insert the utility pole 3 into the utility pole attachment hole 2a formed integrally with the support device 2 which is a molded body as described above. Since the careful work that requires skill to backfill areas with high surface pressure can be avoided, the work is relatively simple, and variations in the support capacity of utility poles among workers can be reduced.

Furthermore, since the utility pole 3 is supported on the ground 1 via the support device 2, the load of the utility pole 3 is shared over a wide range of the ground 1,
Since the surface pressure is reduced, the utility pole 3 is firmly supported by the ground 1.

Moreover, since the lower part of the utility pole 3 is located within the support device 2, it is protected from abrasion damage caused by rocks and corrosion damage caused by soil moisture.

In addition, in the support device 2 of this embodiment, if the utility pole to be erected does not require a very large support force, the utility pole 3 may be erected using only the support device 2 without using the reed force member 4. .

Next, a second embodiment shown in FIG. 5 and FIGS. 6(a) and 6(b) will be described.

This second embodiment is different from the previously described first embodiment in that the anchor portion 14 is formed integrally with the support device 12, and the projecting portion 12c is formed in a shape extending in the radial direction. They differ only in one point, and are similar in other respects.

In the following, only these different points will be explained, and the explanations of the common points with the first embodiment will not be repeated.

That is, in this embodiment, overhanging parts 12c extending in the radial direction are integrally formed on the upper part of the main body part 2b of the support device 12 in which the utility pole mounting holes 2a are formed, and the lower parts of these overhanging parts 12c are integrally formed. The main body portion 2b remains in the cylindrical shape, and this portion is used as the anchor portion 14.

In this embodiment, the six overhanging parts 12c extending in the radial direction create a resistance force against displacement around the axis of the telephone pole 3 to which it is attached, and the six overhanging parts 12c
c and the anchor portion 14 generate a supporting force that prevents the utility pole 3 from tilting.

In this embodiment, since the support device 12 is formed of a single member, unlike the previous first embodiment, the support device 12
Although the length and weight of the water overhang are large, it has the advantage of reducing the number of man-hours required.

(Effects of the Invention) As explained above, according to the present invention, the hole into which the lower part of the utility pole is fitted is formed in the molded body, so that the utility pole can be firmly made of the molded body by inserting the lower part into the molded body. Since it is possible to avoid backfilling in the vicinity of the telephone pole where it is supported and subjected to large surface pressure, the work is relatively simple and the influence of the worker's skill on the supporting force can be reduced.

Since an overhang extending outward in the radial direction of the hole is formed on the outer circumferential surface of this molded body, the lateral load of the utility pole is counteracted by a wide area of the ground due to this overhang, and the surface acting on this area is Since the pressure is reduced, the molded body is firmly supported on the ground.

Therefore, the utility pole can be firmly supported without using branch wires or supports, so the utility pole can be erected in a small space.

[Brief explanation of drawings]

1 to 4 relate to a first embodiment of the present invention.
The figure is a cross-sectional view of the utility pole in an erected state, Figure 2 (a) is a side view of the support device, (b) is a top view, Figure 3 (a) is a side view of the anchor member, and (b) is a top view. , Figures 4(a) to (d)
) is an explanatory diagram of the pole erection work, FIGS. 5 and 6 relate to the second embodiment, FIG. 5 is a sectional view of the utility pole in the upright state, FIG. 6(a) is a side view of the support device, ( b) is a top view, No. 7 @
1A and 1B relate to a conventional example, in which (a) is a side view and (b) is a top view. FIG. 1 Utility pole support device, a: hole (utility pole attachment hole), c, 4a; overhanging portion, e: connecting means (fitting portion), anchor member.

Claims (4)

[Claims] (1) A utility pole support device comprising a molded body having a hole into which the lower part of a utility pole is fitted, and an overhanging portion extending radially outward of the hole on the outer peripheral surface of the molded body. . (2) The utility pole support device according to claim 1, wherein the projecting portion is formed as a spiral fin. (3) The utility pole support device according to claim 1, wherein a connection means for connecting to a separate anchor member is formed at a lower portion of the wire support device. (4) In the utility pole support device according to claim 3, the projecting portion is formed as a spiral fin, and an anchor member is disposed below the connecting means, and the outer peripheral surface of the anchor member is provided with a support for the utility pole. A utility pole support device characterized in that a spiral fin is formed in a direction opposite to that of the fin on the projecting portion of the device.