JPH033670Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for press-fitting and pulling out a casing tube to prevent collapse of a hole wall during underground drilling.

[Conventional technology]

Conventionally, a lower guide ring for guiding the casing tube up and down is provided on the grounding frame attached to a vehicle equipped with an underground drilling device, and a vertical guide frame installed in the grounding frame rotates the clamp unit of the casing tube. A casing tube press-fitting/extracting device has a casing tube press-fitting/extracting device in which a driving device and an upper guide ring of a casing tube attached to the upper part of the casing tube are attached so as to be freely raised and lowered, and the driving device and a grounding frame are connected by a driving device lifting cylinder. Kosho 42−
It is disclosed in Publication No. 7948.

[Problem that the invention attempts to solve]

In order to reduce the weight and size of this conventional device, the upper and lower guide rings of the casing tube and the drive device that rotates and swings the clamp unit of the casing tube, which is disposed between them, are directly attached to the grounding frame. Connecting the clamp unit and the grounding frame with a clamp unit lifting cylinder prevents vibration when transporting the casing tube press-in/extraction device to the construction site or moving it to the drilling position within the construction site. Therefore, since the clamp unit moves eccentrically with respect to the lower guide ring on which it is placed, a problem arises in that a large number of man-hours are required to align the two. In order to avoid this, the clamp unit and the lower guide ring are connected by multiple vertical pins that can be freely inserted and removed during transportation of the device, but when press-fitting or pulling out the casing tube, the vertical pins often By forgetting to remove the clamp unit and rotating it,
There is a risk that the pin connection portion may be damaged.

[Means for solving problems]

The present invention deals with this problem, and when the casing tube is held and tightened by the clamp unit 1, the arcuate plate-shaped protrusion 2 that forms a ring concentric with the casing tube is moved from each segment of the clamp unit. A truncated conical recess 3 that protrudes downward and opens upward into which all the protrusions 2 fit is provided at the top of the lower guide ring 4, and when the clamp unit 1 is expanded, all the protrusions 2 are inserted into the truncated conical recess. The inner diameter of the lower end of the truncated conical recess 3 is set so as to be substantially inscribed in the lower end of the inner wall of the truncated conical recess 3.

[Effect]

According to the above configuration, when the casing tube press-fitting and pulling device is to be transported or moved, the fully arcuate plate-shaped protrusion 2 of the expanded clamp unit 1 is provided at the top of the lower guide ring 4. Since the clamp unit is substantially inscribed in the lower end of the inner wall of the truncated conical recess 3 which is open at the top, the clamp unit is supported concentrically on the lower guide ring 4, and the clamping unit is supported concentrically on the lower guide ring 4, so that the clamping unit can be secured between the two parts before the casing tube is press-fitted or pulled out. There is no need for alignment work or vertical pin insertion/removal work.

Furthermore, when the casing tube is held and tightened by the clamp unit 1, the clamp unit is approximately centered by the casing tube guided by the upper and lower guide rings, so that the entire arcuate plate-like projection 2 and the inner wall of the recess 3 A gap C (Fig. 4) is created between the
The clamp unit 1 can be rotated and oscillated.

〔Example〕

The figure shows an embodiment of the present invention that allows both vertical drilling and inclined drilling.The upper and lower guide rings 5, 4 are connected by a frame-like support 6 at the center of the rear and supports 7, 7 on both sides of the front for rigidity. The lower guide rings 4 of the guide frames 5, 4 are connected and fixed to the upper and lower guide rings, and the lower ends of the piston rods of the clamp unit elevating cylinders 9 whose upper ends are pivotally connected 8 to both sides of the clamp unit 1 between the upper and lower guide rings are connected to the upper and lower guide rings. The guide ring 4 is pivotally mounted on a support member 12 fixed to a grounding frame 11 by a shaft 10 provided on the diameter line. 13 is the guide frame 5, 4
A hydraulic cylinder connects both sides of the front end of the guide frame with abutments 14 provided on both sides of the front part of the grounding frame 11, and by adjusting the expansion and contraction of the hydraulic cylinder 13, the guide frame can be rotated around the shaft 10 as a fulcrum. It can be tilted rearward from the vertical position shown in Figure 2.

As shown in FIG. 3, the clamp unit 1 has side segments 1b integral with a cover 15 of a clamp unit lifting cylinder 9, and both ends of a hydraulic cylinder 16 at both ends of a rear segment 1a that connects a drive device to be described later. Front segment 1 connected to each other
c are sequentially connected with pins in a chain, and the clamp unit is expanded and contracted by expanding and contracting the hydraulic cylinder 16.
The structure is similar to the conventional one, and each front and rear segment 1a, 1c has a casing tube 17.
The center portions of the arcuate shoes 18, which can be replaced depending on the size of the outer diameter of the shoes, are fixed to each other by pressure contact with bolts 19 (FIG. 4).

The drive device of the clamp unit 1 is a grounding frame 11.
The ends of the piston rods 22 of the two rod-type hydraulic cylinders 21 are respectively fixed on the rear end of the cylindrical arm 20 that protrudes further rearward, and one end 23 is pivotally attached to the cylinder of the two-rod type hydraulic cylinder 21. The other end of the telescopic arm 24 is configured as a fork portion 24a, and the fork portion is connected to the clamp unit 1.
When both rod-type hydraulic cylinders 21 are repeatedly extended and contracted, the telescopic arm 24 extends and contracts, and the casing tube 17 held and tightened by the clamp unit 1 is At the same time, the clamp unit elevating cylinder 9 is allowed to expand or contract.

The upper guide ring 5 includes four arcuate segments 5a, 5b, 5c, and 5d connected in sequence with pins in a chain in a continuous groove provided inside a C-shaped planar guide housing 26.
(Fig. 1), and the arcuate segments 5a and 5d at both ends are connected by a hydraulic cylinder 50, and the hydraulic cylinder 50 is extended to connect all the arcuate segments to the inner circumferential wall of the guide housing 26. When inscribed in the casing tube 1, the arcuate segment is inscribed in the casing tube 1.
7 can be raised and lowered freely. Also, when the hydraulic cylinder 50 is contracted and the entire arcuate segment is used to hold and tighten the lower end of the casing tube 17 extracted from the ground, the second casing tube connected to the lower end of the casing tube is clamped. After clamping and tightening with the unit 1, the upper and lower casing tubes can be easily disassembled by contracting the clamp unit lifting cylinder 9. Needless to say, each arcuate segment has an arcuate shoe attached therein, which is replaceable depending on the outer diameter of the casing tube.

In the underground drilling device shown in FIG. 5, the base end of a mast 30 that can be raised and lowered by a derrick cylinder 29 is mounted on a swivel base 28 that is mounted on a crawler traveling device 27 so as to be able to rotate around an axis 0-0. An earth auger drilling machine is attached to a leader 30a fixed to the front surface of the mast so as to be movable up and down. The earth auger drilling machine includes a telescopic Kelly bar 33 suspended from a winch cable 31 via a pulley at the upper end of the mast via a swivel joint 32, an auger bit 34 fixed to the lower end of the Kelly bar, and a leader 30.
It includes a rotary 35 for driving a kelly bar which is attached to the shaft 30 so as to be able to rise and fall freely, and a hydraulic cylinder 36 which is attached between the mast 30 and the rotary 35 so as to give a drilling thrust to the augerbit 34. 37 is leader 3
A support arm 38 is attached to the upper end of the Kelly bar so that it can be raised and lowered to 0a, and 38 is a support arm for a hammer grab hanging wire used when drilling a hammer grab instead of an earth auger. It is pivotably mounted.

The grounding frame 11 is attached to the crawler traveling device 27 by using a telescopic arm 39 (FIG. 2) inserted telescopically into the cylindrical arm 20 at the rear of the grounding frame.
The rear end rising portion 39a and the crawler traveling device 2
A bracket 40a fixed to the crawler support frame 40 of No. 7 is connected with a removable pin 41, and of the front and rear outriggers 42 and 43 on both sides attached to the crawler support frame 40, the front outriggers 42 on both sides are respectively run. Directional telescopic horizontal beam 44
A vertical hydraulic telescoping support leg 45 is attached to the front end of the hydraulic telescoping support leg 45, and both front outriggers 42 are arranged so that the grounding plate 45a of the hydraulic telescoping support leg holds down both rear sides of the grounding frame 11 as shown by chain lines in FIG. , 42 intervals are set.

Therefore, the mast 30 and the guide frames 5, 4
When drilling holes in the inclined position shown in FIG.
When extending to the position shown by the chain line W in the figure and drilling with the mast and guide frame in the vertical position, both the telescopic horizontal beam 44 and the telescopic arm 39 are retracted.

The fact that the lower guide ring 4 has a plurality of arcuate shoes 46 attached thereto with bolts 47, which are replaced depending on the size of the outer diameter of the casing tube, as shown in FIG. Ring 5
Similarly, the entire arcuate shoe 46 cooperates with the lower guide ring 4 to form the bottom surface of the frusto-conical recess 3. A plurality of notches 2a are provided in each of the arcuate plate-like protrusions 2 on the side of the clamp unit 1 that is supported in contact with the bottom surface of the truncated conical recess during transportation, and the casing tube 17 held and tightened by the clamp unit is provided with a plurality of notches 2a. When press-fitting into the ground by reducing the lifting cylinder 9,
Earth and sand pushed into the truncated conical recess 3 on the outer periphery of the full-arc plate-shaped projection 2 is discharged downward from the notch 2a through the gap between the casing tube 17 and the lower guide ring 4. .

[Effect of idea]

According to the invention, in order to move the casing tube press-in and pull-out device, the clamp unit 1
When the clamp unit is expanded with the hydraulic cylinder 16, the clamp unit is automatically supported substantially concentrically on the lower guide ring 4, so there is no need to align the two as in the conventional case, and it is possible to remove the vertical pin. There is no fear of forgetting to insert or remove it.

[Brief explanation of drawings]

Figure 1 is a vertical front view (X-X sectional view in Figure 2),
Fig. 2 is a side view, Fig. 3 is a Y-Y sectional view of Fig. 2, Fig. 4 is an enlarged Z-Z sectional view of Fig. 3, and Fig. 5 is a side view showing the drilling state. be. 17...Casing tube, 27...Crawler traveling device, 28...Swivel base, 30...Mast,
33...Kelly bar, 34...Orgabit, 3
5...Rotary.

Claims (1)

[Scope of utility model registration request] A drive that rotates and swings the upper and lower guide rings that guide the casing tube so that it can move up and down, and the clamp unit of the casing tube that is disposed between the upper and lower guide rings, on a grounding frame that is attached to a vehicle equipped with an underground drilling device. In the casing tube press-in and pull-out device in which the clamp unit and the earthing frame are connected by a clamp unit lifting cylinder, when the casing tube is held and tightened by the clamp unit 1, the casing tube concentric with the casing tube is The arcuate plate-shaped protrusions 2 to form a circular ring are made to protrude downward from each segment of the clamp unit, and the upper-opening truncated conical recesses 3 into which all the protrusions 2 fit are inserted into the lower guide ring 4. Provided at the top,
Press-fitting of a casing tube characterized in that the inner diameter of the lower end of the truncated conical recess 3 is set so that the entire protrusion 2 is substantially inscribed in the lower end of the inner wall of the truncated conical recess 3 when the clamp unit 1 is expanded. and extraction equipment.