JPS5936080B2 - underground hole drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underground hole drilling device used for boring a long underground hole under a river or road in order to bury a humid pipe or the like.

There are many types of devices that have been used in the past as this type of device, but as shown in FIG. A rotary inner cylinder 3 is rotatably supported, and an annular (b) rotary member 4 fixed to the tip of the rotary inner cylinder 3 protrudes from the tip of the outer cylinder and also extends the outer diameter of the rotary blade 4. It is formed to have an outer diameter equal to or greater than the outer diameter of the outer cylinder 1.

Then, a rotational force is applied to the rotating inner cylinder 3, and the rotating annular rotary blade 4 excavates earth and sand underground, and then applies a pressing force to the outer cylinder 2, thereby moving the entire device forward. However, especially when digging through rocky areas or encountering hard rocks, the annular rotary blade 4 may be damaged and the blade 4 must be replaced and repaired. Situations may arise in which excavation work is forced to be interrupted for a long period of time, or a considerable amount of time is required to cut and excavate the rock in question. There are many cases where people are treated poorly.

In addition, encounters with rocks such as those described above not only stop the excavation, but also cause defects such as an involuntary change in the direction of excavation, resulting in a hole that is far off from the intended end of the excavation. there were.

As a result of studies in view of these difficulties, the present invention aims to provide a system that can guarantee shortening of the construction period and that can easily make appropriate corrections in the direction of excavation. In other words, although the configuration described in the conventional example is exactly the same, in FIG. An end plate 7 is fixed on the front end side of the cylinder 6 in the radial direction of the outer cylinder 1, and an earth and sand discharge port 8 is provided in the center of the plate 7, and a rock crushing port is provided on the left and right sides of the end plate 7. A mounting opening 10.10 for attaching and detaching the machine 9 is open.

Further, a fixed inner cylinder 11 fixed to the front end side of the end plate 7 is fitted into the rotary inner cylinder 3 and extends inside the opening of the same cylinder 3, to which the fixed inner cylinder 11 is fixed. A power source 12.1 such as a hydraulic motor is provided on the front end side of the base end 11'.
2... is fixedly installed, and the power is transmitted to the rotating inner cylinder 3 through a transmission mechanism 13 such as a gear or chain.
It is transmitted to the proximal end of.

As the rock crusher 9, it is preferable to use a hydraulic type crushing machine known under the trade name Stenic Hammer, in which a bit rod 15 fitted inside the main cylinder 14 is inserted into the main cylinder 14 in a longitudinal direction. The tip bit 16 is configured to vibrate in the longitudinal direction at high speed using hydraulic pressure, and the vibration of the tip bit 16 can crush rocks and the like.

Further, it is preferable that the illustrated crushing hammer is equipped with a mounting frame 17 as shown in FIG. 3 in advance. main frame 18 for
Interior frame 2 pivoted to be able to rotate left and right by 9'
0 and shaft pins 22 and 22' provided on the vertical frame pieces 21 and 21' of the surrounding frame 20, by which the main cylinder 14 of the crushing hammer is pivotally supported so as to be rotatable in the earthwork direction. Therefore, the same hammer ended up with a bit of 16 at its tip.
23 in the figure shows a mounting hole drilled in the main frame 18.

Next, in the present invention, an excavation direction adjustment ring body 24 is separately provided, and this includes a fitting ring part 25 protruding in the excavation direction, a connecting part 26 protruding in the opposite direction, and a connecting part 26 in the fitting ring part 25. It consists of fixed hydraulic jacks 27, 27, .

The fitting ring portion 25 is connected to the tail opening 5 of the outer cylinder 1.
As shown in FIG. 1, the illustrated connecting portion 26 is formed into a groove with a U-shaped cross section, and the connecting portion 26 is fitted into the groove 26' so as to be slidable therein. The fitted top buried pipe body 28 such as a hume pipe is fitted,
Moreover, the aforementioned hydraulic jack 27.27...
By operating the actuating rod 27', the actuating rod 27' comes into contact with the abutting portion 6 of the outer cylinder 1.

Therefore, in order to excavate an underground hole using the above-mentioned device, the annular rotary blade 4 is rotated by applying rotational force to the rotary inner cylinder 3 by the operation of the power source 12, 12, and the outer cylinder is rotated. By applying an external force to the buried pipe body 28 from the outside, the external force is transmitted to the cylinder 1 via the excavation direction adjustment ring 24, thereby moving the outer cylinder 1 forward. Excavated underground earth and sand are taken into the fixed inner cylinder 3, and the earth and sand are discharged to the outside from the earth and sand discharge port 8 via the buried pipe body 28 by a desired means.

When drilling a hole as described above, if it is confirmed visually or from the operating state of the annular rotary blade 4 that rocks are exposed at the face to be excavated by the annular rotary blade 4, the operation of drilling is stopped. The rock crusher 9 is stopped, the mounting frame 17 of the rock crusher 9 is attached to the mounting opening 10.10 of the end plate 7, the tip bit 16 is directed toward the face, and the rock crusher 9 is operated in the usual manner. Then, the bit rod 15 is extended until it is pressed against the rock, and the rock is crushed by high-speed imaging of the tip bit 16.

When the crushing work is completed in this way, the crusher 9 is removed and the original forward drilling of the hole by the annular rotary blade 4 is resumed.

During such drilling, if the direction of drilling of the outer cylinder 1 changes with respect to the target direction, the drilling is stopped and the hydraulic jack 27° 27... By operating the upper hydraulic jack, the operating rod 27' is pressed against the abutment part 6 of the outer cylinder 1, and thus, for example, the outer cylinder 1, which has been turned upward, is pressed against the operating rod 27' by operating the upper hydraulic jack. What is necessary is to correct the direction of excavation toward the target direction, such as by changing the direction downward by extending ``, and restart the excavation operation after adjusting the direction.

As embodied in the above embodiment, the present invention rotatably supports a rotary inner cylinder 3 in an outer cylinder 1, and a hydraulic motor or the like fixed to the outer cylinder 1 is mounted on the base end side of the rotary inner cylinder 3. Power source 12
At the same time, a rotational force is applied through the transmission mechanism 13, and the annular rotary blade 4 fixed to the tip of the inner tube 3 is made to protrude from the tip of the outer tube 1, and the outer diameter of the rotary blade 4 is adjusted to the outer diameter of the outer tube. An end plate 7 formed to have an outer diameter equal to or larger than the outer diameter of the outer cylinder 1 and fixed in the radial direction on the proximal end side of the outer cylinder 1 has a mounting hole for detachably mounting an earth and sand discharge port 8 and a rock crusher 9. 10 is opened, and the outer cylinder 1 has a pressing part 6 protruding from the inner wall near the tail opening 5, and the fitting ring part 25 of the excavation direction adjusting ring 24 is attached to the tail opening 5. A connection part 26 is removably fitted into the adjustment ring body 24 and is fitted into the leading buried pipe body 28 such as a hume pipe.
Since the operating rod 27' is provided with a plurality of hydraulic jacks 27 that can be freely pressed against the pressing portion 6, it is possible to remove the rock crusher 9 if rocks or the like are encountered during drilling. Therefore, after crushing the rock without excavating it with the annular rotary blade 4, drilling can be resumed, which of course improves work efficiency. This eliminates the possibility of the annular rotary blade 4 being worn or damaged by rocks and requiring long-term interruptions in construction for replacement or repair, and from this point of view, it is possible to guarantee a significant reduction in the construction period. It becomes possible.

Furthermore, due to encounters with the above rocks and other causes, the outer cylinder 1
Even when the excavation direction of the buried pipe 2 changes unexpectedly, the excavation direction adjustment ring 24 equipped with a plurality of hydraulic jacks 2γ
8 and the outer cylinder 1, it is possible to correct the direction change in an extremely short time by operating the desired hydraulic jack. Fine adjustments can be made with simple operations to avoid drilling holes that are far off-center, improving the accuracy of construction work.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing the use of the underground hole drilling equipment according to the present invention, Fig. 2 is a vertical cross-sectional rear view of the end plate portion of the equipment, and Fig. 3 is a vertically sectional view showing how the equipment can be attached to the end plate. FIG. 3 is a front view showing the mounting frame of the rock crusher. 1... Outer cylinder, Meter... Rotating inner cylinder, 4... Annular rotating blade,
5... Tail opening, 6... Pushing part, 7... End plate, 8... Sediment discharge port, 9... Rock crusher, 10...
・Mounting port, 24... Excavation direction adjusting ring, 25... Fitting ring, 26... Connecting part, 27... Hydraulic jack,
27'... Operating rod, 28... Buried pipe body.

Claims (1)

[Claims] 1. A rotating inner cylinder is rotatably transmitted inside the outer cylinder, and rotational force is applied to the proximal end of the rotating inner cylinder via a transmission mechanism from a power source such as a hydraulic motor fixed to the outer cylinder. , an annular rotary blade fixed to the tip of the inner tube is made to protrude from the tip edge of the outer tube, and the outer diameter of the rotary blade is equal to or larger than the outer diameter of the outer tube, and The end plate fixed in the radial direction has a sand discharge port and a mounting port for removably attaching the rock crusher, and the outer cylinder has a holding part near the tail opening and a pressing part from the inner wall. A fitting ring part of an excavation direction adjusting ring body is removably fitted into the tail opening, and a connecting part to be fitted to a buried pipe body such as a leading hume pipe is fitted into the tail opening. An underground hole excavation device characterized in that a plurality of hydraulic jacks are provided, the operating rods of which can press freely against the abutting portion.