JP3054108U - Electric pole hole collapse prevention tool - Google Patents

Abstract

(57) [Summary] [Problem] To prevent collapse of a drilled telephone pole hole,
Prevents pedestrians from falling into telephone pole holes. SOLUTION: The collapse prevention device 10 is formed in a bag shape by a rubber sheet or a resin film, and is capable of expanding and contracting freely. The collapse prevention device 10 expands into a columnar shape when air is injected from the supply / discharge port 18, and is disposed inside the telephone pole hole 20 in an expanded state, and prevents sediment collapse on the wall surface of the telephone pole hole 20. .

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 TECHNICAL FIELD The present invention relates to a utility pole hole collapsing prevention device to be placed inside a utility pole hole excavated to build a utility pole.

[0002]

[Prior art]

 When rebuilding more than one utility pole at a time with power and communication cables, multiple utility poles were excavated along the cable instead of building a new utility pole each time one utility pole was drilled Later, new utility poles will be built in each utility pole hole. In particular, in the case of a so-called common pole where cables from multiple companies are strung, the diameter of the pole hole to be drilled is 50 cm or more and the depth is about 3 m because the pole is thick, so it is difficult to dig by hand. From this point, utility poles are drilled using an auger attached to the work vehicle, and in order to carry out the work of rebuilding the utility poles efficiently, utility poles are drilled near each utility pole to be rebuilt. A simple telephone pole is being built.

[0003]

[Problems to be solved by the invention]

 However, it is difficult to build a utility pole in each utility pole hole immediately after excavating multiple utility pole holes, and it takes a certain number of days from drilling a utility pole hole to building a utility pole. Especially in rocky areas, it is not easy to drill power pole holes, so it takes a lot of time to drill all the power pole holes for rebuilding. For this reason, the excavated utility pole hole is often left untouched for a while, and the earth and sand on the hole wall collapses and fills the hole before the utility pole is built, and the specified depth cannot be secured. In such a case, the hole has to be re-drilled again, which requires wasteful labor and cost. In addition, if the construction period is delayed, pedestrians may fall into the hole if the excavated telephone pole hole is left for a long period of time. It prevents falling into holes, making safety measures and safety management difficult.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and aims to prevent collapse of an excavated telephone pole hole and prevent a pedestrian or the like from falling into the telephone pole hole. I have.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the utility pole hole prevention device according to the present invention is configured by an expandable and contractible hollow body disposed in a utility pole hole excavated for building a pole.

[0006]

[Action]

 In the present invention configured as described above, a hollow body made of, for example, rubber or plastic, which is expandable and contractible, is expanded and arranged inside a pole hole excavated. Prevent it from collapsing. Therefore, it is possible to prevent the utility pole hole from being filled by the collapse of the soil on the wall, eliminate the work of excavating to the specified depth again, reduce unnecessary power and labor, and reduce the cost of rebuilding the utility pole. be able to. In addition, since the inflated hollow body is arranged in the telephone pole hole, even if the construction time is delayed and the telephone pole hole is left for a long time, accidents such as pedestrians falling into the telephone pole hole may occur. This can improve safety and reduce security measures and safety management.

[0007]

[Embodiment of the invention]

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a utility pole collapse prevention device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of an expanded state of a utility pole collapse prevention device according to an embodiment of the present invention, FIG. 2 is a front view of a contracted state, and FIG. 3 is a longitudinal view of a contracted state. It is the side view seen from the direction. In these figures, the collapse prevention device 10 is formed in a hollow bag shape, and becomes substantially cylindrical when air is injected thereinto and inflated. It is placed inside the telephone pole hole 20 excavated.

[0008] The collapse prevention device 10 is formed by, for example, cutting and bonding two rubber sheets into a predetermined shape. That is, as shown in FIG. 4, the collapse prevention device 10 is configured such that the two rubber sheets are overlapped, the peripheral portion of the main body 12 is turned back, and the welded portion is peeled off when air is injected. To prevent this, two portions of the edge 14 are sewn 16 by a sewing machine. Further, as shown in FIG. 2, the rubber sheet has both ends in the longitudinal direction cut into a trapezoidal shape, and when the collapse prevention device 10 is expanded, both ends of the collapse prevention device 10 are tapered. It is in a state. The collapse preventing device 10 has a cylindrical supply / discharge port 18 for injecting or discharging air at one end. A stopper 22 is removably inserted into the supply / drain port 18.

As shown in FIG. 5, the stopper 22 is formed in a columnar shape, and has a tapered portion 24 at the tip end for facilitating insertion into the supply / discharge port 18. The stopper 22 has a through hole 26 at the rear end thereof. As shown in FIG. 1, the string 27 is passed through the through hole 26 to move the stopper 22 from the supply / drain port 18. It is designed to be easily pulled out.

The collapsing prevention device 10 configured as described above inflates by injecting air into the inside from the supply / discharge port 18 at the site where the utility pole hole 20 is excavated, and then inserts the stopper plug 22 into the supply / discharge port 18. So that the injected air does not leak. Thereafter, as shown in FIG. 1, the collapse prevention device 10 is arranged inside the telephone pole hole 20 with the supply / discharge port 18 side up.

As a result, since the collapse prevention device 10 blocks the inside of the utility pole hole 20, it is possible to prevent the soil on the wall from collapsing. For this reason, it is possible to avoid a situation in which the utility pole hole 20 is buried with earth and sand and excavate again, and it is possible to reduce the construction cost of the utility pole. In addition, since the collapse prevention device 10 exists inside the telephone pole hole 20, it is possible to prevent a pedestrian from falling into the telephone pole hole 20. In the embodiment, since the lower end of the main body 12 is tapered in the expanded state, the collapse preventing device 10 can be easily inserted and arranged in the utility pole hole 20. In addition, since the collapse prevention device 10 is formed of a deformable rubber sheet, it can be easily inserted even if the inner surface of the utility pole hole 20 has irregularities. Also, when storing, a large storage place is not required because the inside air is deflated and rolled or folded.

When building a telephone pole, the string 27 is pulled and the stopper plug 22 is pulled out from the supply / drain opening 18. As a result, the collapsing prevention device 10 can easily be taken out from the telephone pole hole 20 because the internal air escapes from the supply / discharge port 18 and collapses. Then, the lower part of the utility pole is inserted into the utility pole hole 20 from which the collapse prevention tool 10 is taken out, and the surroundings are filled with earth and sand and hardened. When the collapse prevention device 10 is arranged in the telephone pole hole 20, a fence may be arranged around the portion exposed from the ground surface so that a pedestrian does not trip.

In the above embodiment, the case where the collapse preventing device 10 is formed of rubber has been described, but it may be formed of a plastic film such as polyethylene, polypropylene, and nylon. Further, in the above-described embodiment, a case has been described in which the collapse prevention device 10 is disposed in the pole hole 20 where excavation is completed to prevent the collapse of the pole hole 20. When the work is to be completed, a collapse prevention tool can be placed in the pole during excavation to prevent the pole from collapsing by the next day's work. In the above-described embodiment, the case where the supply / discharge port 18 is disposed in the utility pole hole 20 with the supply / discharge port 18 protruding from the main body 12 has been described. The power supply / discharge port 18 may be arranged in the power pole hole 20 with the supply / discharge port 18 pushed into the main body 12.

[0014]

[Effect of the invention]

 As described above, according to the present invention, an expandable and contractible hollow body made of, for example, rubber or plastic is expanded and arranged inside a telephone pole hole excavated, and the wall of the telephone pole hole is formed by the hollow body. By preventing the collapse of the wall sediment by holding down, the utility pole hole can be prevented from being filled with earth and sand, and the work of excavating to the specified depth again can be eliminated, eliminating unnecessary labor and cost. In addition, the cost of rebuilding telephone poles can be reduced. In addition, by disposing the expanded hollow body in the telephone pole hole, accidents such as pedestrians falling into the telephone pole hole can be prevented even when the construction time is delayed and the telephone pole hole is left for a long time. Safety measures can be improved, and safety measures and safety management can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a utility pole hole prevention device according to an embodiment of the present invention is expanded.

FIG. 2 is a front view showing a state in which the utility pole hole prevention device according to the embodiment of the present invention is contracted.

FIG. 3 is a side view of the electric pole hole collapsing prevention device according to the embodiment of the present invention, viewed from the longitudinal direction in a contracted state.

FIG. 4 is a detailed explanatory view of a peripheral portion of the utility pole hole preventing device according to the embodiment of the present invention.

FIG. 5 is a front view of the stopper according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Collapse prevention tool 12 Main body part 18 Supply / drain port 22 Stopcock 26 Through-hole 27 String

Claims (1)

[Utility model registration claims] 1. A utility pole hole collapse prevention device comprising an expandable and contractible hollow body disposed in a utility pole hole excavated for building a pole.