JP3235704U - Underground drilling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground drilling device capable of burying a water pipe by omitting work for cutting a pavement and removing a part of a gutter.
SOLUTION: A leading portion 12 is provided with an excavation portion 26 provided with a screw whose outer diameter is sequentially reduced toward the tip portion 20 in the vicinity of a tip portion 20 at one end of the drive shaft 16, and the excavation portion 26 of the drive shaft 16 is provided. A transport portion 24 provided with screws having the same outer diameter and a constant pitch (larger than the tip portion) is provided in a portion extending from the portion to the connection portion 18. As the excavation progresses, a plurality of extension portions 13 which are sequentially added to the leading portion 12 via the male screw portion 38 or the female screw portion 40 are provided, and excavation across the road is also possible.
[Selection diagram] FIG. 5

Description

The present invention relates to an underground drilling device for digging a hole in the ground for burying a water pipe or the like.

For example, when branching a water pipe buried in a road and pulling the water pipe into a building along the road, a part of the road and a part of the building site are excavated in a split shape for branching. Buried water pipes. In this case, the pavement of the road is cut off, a part of the gutter on the side of the road is removed, and the pavement of the building site is cut off. Various tools are used for this.

Japanese Unexamined Patent Publication No. 2002-146716 Utility model registration No. 3169927

The known conventional techniques have the following problems to be solved.
Waterworks block a part of the road, which hinders road traffic. Therefore, I want to finish the work in the shortest possible time. The same applies to the premises of the building. However, cutting out the pavement and removing and restoring a part of the gutter requires a considerable amount of work and time, and it is not easy to shorten the time. Although complicated excavation tools are also introduced, it is not possible to secure a work space on narrow roads. In addition, if a gutter (U-shaped groove) is partially removed and dug up, restoration work is required to compact the ground after backfilling, which increases the workload. In particular, cutting the road surface of a paved road has a large effect on road traffic. The present invention has been made by paying attention to the above points, and an object of the present invention is to provide an underground drilling device capable of crossing an underground road on a paved road.

The following configuration is a means for solving the above problems.

<Structure 1>
The rotating shaft 15 of the rotary machine 14 is provided with a leading portion 12 for excavating the ground and a plurality of extending portions 13 which are sequentially added as excavation progresses in order to transmit the rotation of the rotating shaft 15 to the leading portion 12. ,
The leading part 12 is
A male screw portion 38 or a female screw portion 40 for connecting the rotary shaft 15 of the rotary machine 14 is provided at one end of the drive shaft 16, a tip portion 20 is provided at the other end, and the maximum is in the vicinity of the tip portion 20 of the drive shaft 16. An excavation portion 26 having an outer diameter of R1 and provided with a screw having a pitch L2 that gradually reduces the outer diameter toward the tip portion 20 is provided, and the outer diameter extends from the excavation portion 26 of the drive shaft 16 to the connection portion 18. It is provided with a transport unit 24 provided with a screw having a constant pitch L1 (L1> L2) at R1.
The extension portion 13 is
The entire length of the drive shaft 16 is provided with a transport portion 24 provided with screws of the constant pitch, and one end thereof is a male screw portion 38 or a female screw portion 40 provided on the rotary shaft 15 of the rotary machine 14 or another extension portion 13. An underground excavator comprising a male screw portion 38 or a female screw portion 40 for connecting, and a male screw portion 38 or a female screw portion 40 for connecting another extension portion 13 at the other end.

<Structure 2>
The underground excavation device according to claim 1, wherein a spanner portion hanging portion is provided on the outer peripheral surface on the male screw portion 38 side and the female screw portion 40 side of the connection portion 18.

<Structure 3>
The underground excavation device according to claim 1 or 2, wherein the rotary machine 14 is provided with a leg that prevents the rotary machine from rotating due to a reaction during excavation.

The tip portion 20 and the excavation portion 26 provided in the leading portion 12 excavate the ground 30 with a screw having a maximum outer diameter of R1 and a pitch L2 that gradually reduces the outer diameter toward the tip portion 20. Since the pitch is small and the taper shape as a whole, the soil can be crushed into small pieces for excavation. The transport unit 24 discharges the earth and sand excavated by the screw of a large pitch to the rear.
As excavation progresses, a plurality of extension portions 13 can be sequentially added to the leading portion 12 for excavating the ground on the rotating shaft 15 of the rotary machine 14, so that the underground can be laid underground without damaging the pavement surface 43. It can be excavated to cross.

1 (a) is a side view showing an embodiment of an underground excavation device, (b) is a side view rotated 90 degrees around a drive shaft 16 of a tip portion 20, and (c) is a side view of an excavation portion 26 during excavation. It is a side view explaining the action. It is a vertical sectional view of the ground which shows the usage of the underground drilling apparatus. FIG. 3A is a cross-sectional view of the ground in a state where excavation has progressed, and FIG. 3B is a vertical cross-sectional view. A state in which the protective tube 32 is inserted into the hole made in the ground 30 is shown, (a) is a cross-sectional view of the ground, and (b) is a vertical cross-sectional view of the ground. It is sectional drawing of the ground in the state which the leading part 12 and the extension part 13 are connected and excavated.

Hereinafter, embodiments of the present invention will be described in detail for each example.

1 (a) is a side view showing an embodiment of an underground excavation device, (b) is a side view rotated 90 degrees around a drive shaft 16 of the tip portion 20, and (c) is an excavation portion 26 at the time of excavation. It is a side view explaining the action of.
In this underground excavation device, as will be described later with reference to FIG. 5, the leading portion 12 and the extension portion 13 are connected to perform excavation. In FIG. 1, the structure of the rotating machine 14 for driving the apparatus and the preceding portion 12 will be described.

The leading portion 12 shown in the figure can be made of, for example, a steel having a total length of about 1 m. The outer diameter of the drive shaft 16 is, for example, about 2 cm, and the outer diameter R1 of the screw in the middle portion is, for example, about 5 cm. One end of the drive shaft 16 of the leading portion 12 includes a connecting portion for connecting the rotating machine 14. Further, the other end of the drive shaft 16 is provided with a tip portion 20 for piercing the ground.

The leading portion 12 is provided with a female screw portion 40 for connecting to a male screw portion 38 provided on the rotating shaft 15 of the rotary machine 14 at one end. The female screw portion 40 may be provided on the rotating shaft 15 and the male screw portion 38 may be provided on the side of the leading portion 12.

In the vicinity of the tip portion 20 of the drive shaft 16 of the leading portion 12, a screw having a maximum outer diameter of R1 and a pitch L2 whose outer diameter is gradually reduced toward the tip portion 20 is provided. This part has a function of excavating the ground and is called an excavation part 26. On the other hand, a screw having a constant pitch L1 (L1> L2) with an outer diameter R1 is provided in a portion of the drive shaft 16 from the excavated portion 26 to the connecting portion 18. This portion has a function of sending excavated earth and sand to the rear and adjusting the hole diameter, and is referred to as a transport portion 24.

As shown in (b) of the figure, the tip portion 20 has a tip shape that breaks through the earth and sand in the ground 30. The excavation section 26 serves to crush the soil on the ground sufficiently. The finely crushed soil is sent backward (in the direction of the connecting portion 18) by the rotation of the transport portion 24. When the screw pitch of the transport portion 24 is equal to the screw pitch of the excavation portion 26, the leading portion 12 is screwed into the soil just like a screw nail, and the rotation stops. If the screw pitch of the excavated section 26 is larger than that of the transport section 24, the excavated earth and sand will not be sufficiently fine and cannot be transported by the transport section 24. Therefore, a configuration in which the screw pitch of the excavation portion 26 is narrow is suitable. The preceding portion 12 is a tool suitable for laying pipes having an outer diameter of about several centimeters, such as electric wire pipes and gas pipes.

FIG. 2 is a vertical sectional view of the ground showing how to use the leading portion 12.
As shown in the figure, the connecting portion 18 of the leading portion 12 is mounted on the rotating shaft 15 of the rotary machine 14 by using the male screw portion 38 and the female screw portion 40 as described above. The rotary machine 14 is an electric motor or the like, and rotationally drives the drive shaft 16 of the preceding portion 12. The tip portion 20 of the leading portion 12 advances while excavating the ground as described above. The excavation section 26 expands the hole diameter to R1 while finely crushing the earth and sand. Since the excavation portion 26 has a small pitch and is tapered as a whole, excavation can be performed with a relatively small force.

FIG. 3A is a cross-sectional view of the ground in a state where excavation has progressed, and FIG. 3B is a vertical cross-sectional view.
The transport unit 24 is a screw with a large pitch L1 and discharges the excavated earth and sand to the rear. A U-shaped groove 28 is installed on the ground 30. The excavation hole 36 can be formed under the U-shaped groove 28 by rotationally driving the drive shaft 16 by the rotary machine 14 and manually pushing the rotary machine 14 in the direction of the arrow A. It is not necessary to move the U-shaped groove 28.

4A and 4B show a state in which the protective tube 32 is inserted into the hole made in the ground 30 as shown in FIG. 3, where FIG. 4A is a cross-sectional view of the ground and FIG. 4B is a vertical cross-sectional view of the ground.
The protective tube 32 having the screw outer diameter R1 of the transport portion 24 is inserted into the hole excavated in FIG. The water pipe 21 is inserted inside the protection pipe 32. The protection pipe 32 serves as a protection to prevent an external pressure from being directly applied to the water pipe 21.

As described above, as shown in FIG. 4B, the water pipe 32 can be buried from the left side of the figure to the right side of the figure without removing the U-shaped groove 28. If the screw whose outer diameter of the leading portion 12 is substantially equal to the outer diameter of the protective pipe 32 is used, the construction is completed without excavating the ground 30 other than the place where the protective pipe 32 is buried. Therefore, the work of compacting and backfilling the surrounding soil can be minimized. Further, since the leading portion 12 can have a sufficiently short overall length, it is small and lightweight, and is suitable for excavating under a paved road or a U-shaped groove.

FIG. 5A shows a cross-sectional view of the road. The leading portion 12 is shown on the right side of FIG. 5B, and the extension portion 13 is shown on the left side in a side view.

The device in this figure is digging a hole under the pavement 43 so as to cross the road. The structure of the preceding portion 12 is as already described with reference to FIG. 1 (a).

A plurality of extension portions 13 are prepared to be added after the leading portion 12 to extend the length thereof. The same transport section 24 as the leading section 12 is provided on the entire length of the drive shaft 16 of the extension section 13. The transport portion 24 has a screw having an outer diameter R1 and a constant pitch L1 similar to that of the main body portion.

At one end (right end) of the extension portion 13, a male screw portion 38 for connecting to the female screw portion 40 of the leading portion 12 is provided. At the other end (left end) of the extension portion 13, a female for connecting to a male screw portion 38 provided on the rotating shaft 15 of the rotary machine 14 and a male screw portion 38 provided on another extension portion 13 to be added. A screw portion 40 is provided.

That is, a male screw portion 38 and a female screw portion 40 are used for the connection between the rotary shaft 15 of the rotary machine 14, the leading portion 12, and the extension portion 13. It suffices that one of them has a male screw portion 38 and the other has a female screw portion 40.

For example, contrary to the examples of FIGS. 1 (a) and 5 (a), when the female screw portion 40 is provided on the rotating shaft 15 of the rotary machine 14, the male screw portion 38 is provided on the leading portion 12. A female screw portion 40 is provided on the leading portion 12 side of the extension portion 13. A male screw portion 38 is provided on the rotating machine 14 side of the extension portion 13. A hexagonal outer peripheral surface spanner hooking portion may be provided on both the male screw portion 38 side and the female screw portion 40 side so that the spanner can be used when attaching / detaching the connection portion 18.

At the beginning of the excavation work, the ground 30 on the side where the excavation is started is dug down to a length enough to accommodate the leading portion 12 and the rotating machine 14. After that, as shown in the example of FIG. 5A, a plurality of extension portions 13 are added. In this way, it can be extended from 2 meters to 4 meters in length. This allows you to cross a 4 meter wide road.

Even longer excavation is possible by using the rotating machine 14 having a strong horsepower. Since both connection portions are connected by tightening screws, there is no rattling in the case of this length, and it can be extended linearly while maintaining sufficient strength.

After completing the necessary excavation, the extension portions 13 may be removed one by one while pulling out the whole. If the drive shaft is not rotated in the reverse direction, there is no concern that the screw will loosen and come off when it is pulled out. Since the whole is pulled out little by little as it is, the shape of the hole can be maintained, and the protective tube 32 can be immediately inserted to prevent the hole from collapsing thereafter.

As described above, it is possible to lay water pipes without damaging the pavement surface of the road. Further, since the protective pipe 32 is embedded, not only the water pipe but also the electric cable and the communication cable can be installed in the protective pipe 32.

12 Leading part 13 Extension part 14 Rotating machine 15 Rotating shaft 16 Drive shaft 18 Connection part 20 Tip part 21 Water pipe 24 Transport part 26 Excavation part 28 U-shaped groove 30 Ground 32 Protective pipe 36 Excavation hole 38 Male thread part 40 Female thread part 43 Pavement surface

Claims (2)

The rotating shaft 15 of the rotary machine 14 is provided with a leading portion 12 for excavating the ground and a plurality of extending portions 13 which are sequentially added as excavation progresses in order to transmit the rotation of the rotating shaft 15 to the leading portion 12. ,
The leading part 12 is
A male screw portion 38 or a female screw portion 40 for connecting the rotary shaft 15 of the rotary machine 14 is provided at one end of the drive shaft 16, a tip portion 20 is provided at the other end, and the maximum is in the vicinity of the tip portion 20 of the drive shaft 16. An excavation portion 26 having an outer diameter of R1 and provided with a screw having a pitch L2 that gradually reduces the outer diameter toward the tip portion 20 is provided, and the outer diameter extends from the excavation portion 26 of the drive shaft 16 to the connection portion 18. It is provided with a transport unit 24 provided with a screw having a constant pitch L1 (L1> L2) at R1.
The extension portion 13 is
The entire length of the drive shaft 16 is provided with a transport portion 24 provided with screws of the constant pitch, and one end thereof is a male screw portion 38 or a female screw portion 40 provided on the rotary shaft 15 of the rotary machine 14 or another extension portion 13. An underground excavator comprising a male screw portion 38 or a female screw portion 40 for connecting, and a male screw portion 38 or a female screw portion 40 for connecting another extension portion 13 at the other end. The underground excavation device according to claim 1, wherein a spanner portion hanging portion is provided on the outer peripheral surface on the male screw portion 38 side and the female screw portion 40 side of the connection portion 18.

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