JPS6239135Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an earth removal device for an underground boring machine used in a pile driving device or the like.

FIG. 1 shows a pile driving device, in which a leader 2 supported by a main body 1, an auger machine 3, a reaction force receiver 4,
Monkey 5 and earth removal device 6 are engaged to be able to move up and down, respectively. The auger machine 3 is suspended and supported by a wire 7. The upper end of the hollow pile 8 is brought into contact with the lower end of the earth removal device 6, and the hollow pile 8 is press-fitted into the ground through the earth removal device 6. 9 is a hydraulic cylinder for press-fitting that connects the auger machine 3 and the earth removal device 6. A drilling rod 10 connected to the auger machine 3 is inserted into the hollow pile 8 through the earth removal device 6, and a cutter 11 installed at the tip of the rod 10 excavates below the tip of the hollow pile 8. According to this, the hollow pile 8 is press-fitted. The excavated soil at this time is transported inside the hollow pile 8 by compressed air ejected from the tip of the rod 10, and is discharged from the discharge port provided on the side wall of the soil removal device 6, but the discharged soil is directed upward. Since it is discharged at a considerable speed, it may collide with the discharge port and be scattered around.

As a countermeasure against this problem, as shown in Fig. 1, a means is taken to attach a downward facing cover 12 to the discharge port of the discharge device 6, but this cover 12 prevents soil from scattering diagonally downward. The drawback was that I couldn't do it.

The present invention was developed in consideration of the above-mentioned problems, and by temporarily storing the earth and sand during drilling in an earth removal device and discharging it all at once to an appropriate location after drilling is completed, it is possible to An underground drilling machine that completely prevents earth and sand from scattering around the underground drilling machine, eliminates secondary pollution caused by flying earth and sand, and also allows for easy disposal of discharged earth and sand. The aim is to provide a soil removal device for machines.

Hereinafter, embodiments of the present invention will be described based on FIG. 2 and subsequent figures.

In the figure, reference numeral 15 denotes an earth removal device according to the present invention, and this earth removal device 15 is supported by a hydraulic cylinder 9 for press-fitting into the reaction force receiver 4. This soil removal device 1
5 has a double structure consisting of an outer cylinder 16 and an inner cylinder 17, and the excavation rod 10 passes through the inner cylinder 17. The upper end of the inner cylinder 17 is open inside the upper part of the outer cylinder 16. 18 is a stay that fixes this inner cylinder 17 to the outer cylinder 16. The bottom of the donut-shaped space made up of the outer cylinder 16 and the inner cylinder 17 of the earth removal device 15 is open, and two pile caps 19a and 19b are attached to this open end so that they can be opened and closed. . Reference numerals 20a and 20b are cylinder devices that open and close the respective pile caps 19a and 19b. Further, an auxiliary opening/closing window 22 that can be opened and closed by a cylinder device 21 is provided on the lower side surface of the outer cylinder 16 of the earth removal device 15.

In the above configuration, when driving the hollow pile 8, the upper end of the hollow pile 8 is held down by the closed pile caps 19a and 19b, and together with this, the earth removal device 15
Then, the rod 10 that has penetrated the hollow pile 8 is rotated, the cutter 11 attached to the tip of the rod 10 is used to excavate the lower side of the tip of the hollow pile 8, and a hydraulic cylinder 9 for press-fitting is used to excavate the earth using a soil removal device. 15 will be lowered. The excavated earth and sand at this time rises inside the hollow pile 8,
The soil further rises inside the inner cylinder 17 of the earth removal device 15, enters the donut-shaped space between the inner cylinder 17 and the outer cylinder 16 from the upper end of the inner cylinder 17, and is stored there. At this time, along with the earth and sand,
Compressed air is flown in to transport the earth and sand, but this air is discharged from an air vent hole 23 provided at the upper end of the earth removal device 15.

When the prescribed pile driving work is completed, the pile driving device is rotated to position the earth removal device 15 at an appropriate location, for example, above the vessel of a dump truck, and the pile caps 19a and 19b are opened. The accumulated earth and sand is dropped onto the Bethel.

The earth removal device of the underground boring machine according to the present invention is as described in detail above, and the hollow pile 8 is located at the lower end of the earth removal device 15.
The cutter 11 provided at the tip of the rod 10 that penetrates the earth removal device 15 and the hollow pile 8 is used to excavate the lower side of the hollow pile 8, press-fit the hollow pile 8, and remove the excavated soil. In this underground drilling machine, the soil removal device 15 is configured to discharge soil through the hollow pile 8 into the earth removal device 15.
The inner cylinder 17 has a double pipe structure, and the upper end of the inner cylinder 17 is open at the upper part of the outer cylinder 16, and the bottom of the donut-shaped space between the outer cylinder 16 and the inner cylinder 17 is formed at the lower end of the outer cylinder 16. Since the pile caps 19a and 19b are configured to be openable and closable, the earth and sand discharged into the earth removal device 15 is temporarily stored in the doughnut-shaped space between the outer cylinder 16 and the inner cylinder 17 of the earth removal device 15. However, after drilling is completed, the pile caps 19a and 19b can be opened and discharged to an appropriate location, completely preventing dirt from scattering around the underground drilling machine during drilling. Secondary pollution can be prevented. Further, since the discharged earth and sand can be dropped all at once into a vessel such as a dump truck, the disposal of the discharged earth and sand becomes easy.

[Brief explanation of the drawing]

Figure 1 is a schematic external view of the pile driving device, Figure 2
The figure is a sectional view showing an example of the earth removal device according to the present invention.
FIG. 3 is a bottom view, and FIG. 4 is a side view. 8 is a hollow pile, 10 is a rod, 11 is a cutter, 1
5 is an earth removal device, 16 is an outer cylinder, 17 is an inner cylinder, 19
a, 19b are stake caps.

Claims (1)

[Scope of utility model registration request] A rod 10 presses the hollow pile 8 at the lower end of the earth removal device 15 and penetrates the earth removal device 15 and the hollow pile.
The lower side of the hollow pile 8 is excavated with a cutter 11 provided at the tip of the hollow pile 8, and the hollow pile 8 is press-fitted, and the excavated soil is discharged through the hollow pile 8 into the earth removal device 15. In the underground drilling machine, the earth removal device 15 has a double pipe structure consisting of an outer cylinder 16 and an inner cylinder 17, and the upper end of the inner cylinder 17 is open at the upper part of the outer cylinder 16. This earth removal device for an underground boring machine is characterized in that pile caps 19a and 19b forming the bottom of the donut-shaped space between the outer cylinder 16 and the inner cylinder 17 are provided at the lower end so as to be openable and closable.