JPH051359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underground drilling apparatus to which a device for press-fitting and pulling out a casing tube during drilling can be attached.

[Conventional technology]

A hoist vehicle is constructed by mounting a swivel platform equipped with a hoist that can raise and lower a conventional underground drilling tool on a crawler support frame of a crawler traveling device with outriggers attached to both rear sides, and the front part of the crawler support frame. A guide frame for guiding the casing tube in a vertically movable manner, a drive device for rotating the clamp unit of the casing tube alternately left and right, and a clamp unit lifting cylinder are attached to the ground frame, the rear end of which is connected with a pin so that it can move up and down. The underground drilling equipment including the attached attachment is
This is shown in Japanese Patent Publication No. 42-7948.

[Problem that the invention seeks to solve]

However, when the diameter of the hole, that is, the inner diameter of the casing tube, becomes larger than about 1.2 m, the weight of the attachment cannot suppress the press-in reaction force of the casing tube that acts on the grounding frame, and many weights are placed on the grounding frame. This requires a large amount of man-hours to move and install the attachments. In order to avoid this, it is possible to connect the crawler support frame and the attachment with a hydraulic cylinder that can receive the press-fitting reaction force of the casing tube and lift the grounded attachment. The moment arm length of the hydraulic cylinder's central expansion and contraction force is reduced due to the structure of the crawler support frame, which not only causes an increase in the capacity of the hydraulic cylinder, but also causes the hoist car with the attachment removed to move the front outrigger. Therefore, the hoist car cannot be used for ready-made pile driving methods such as vibrating sheet pile driving methods, other foundation construction methods, etc.

[Means for solving problems]

The present invention deals with this problem, and provides a vertical hydraulic extension whose lower end can be connected to the middle part of the earthing frame between the clamp unit lifting cylinder connection part of the earthing frame and the pin connection part of the rear end of the earthing frame. Front outriggers each having supporting legs are attached to both sides of the front part of the crawler support frame, and the front outriggers are configured to transmit the casing tube press-fit reaction force acting on the grounding frame to the crawler support frame, and the hydraulic pressure The hydraulic pressure is adjusted such that the telescopic support legs can be freely adjusted to expand and contract between an extended position in which the front part of the hoist car is stably supported on the ground when the attachment is removed, and a contracted position in which the attachment connected to the hoist car is lifted off the ground. The feature is that the stroke of the telescopic supporting legs is set.

[Effect]

When drilling with an underground drilling tool, tightening or releasing a casing tube for preventing collapse of the hole wall using a clamp unit, and rotating or stopping the clamp unit alternately left and right using a drive device;
Combining the operation of raising or lowering the clamp unit with its lifting cylinder in the same manner as before,
When press-fitting or pulling out the casing tube, connect the rear end of the grounding frame to the front part of the crawler support frame with a pin, connect the lower end of the hydraulic telescopic support leg of the front outrigger to the middle part of the grounding frame, and attach the grounding frame to the ground. The hoist car is horizontally supported on the ground by the hydraulic telescoping support legs supported via the rear outrigger and the rear outrigger.

Therefore, even if the press-fit reaction force R of the casing tube acts on the clamp unit lifting cylinder connection part of the grounding frame as shown in Fig. 6, the reaction force R is transmitted to the crawler support frame via the front outriggers on both sides. Ru. That is, the downward force Q acting on the pin connection at the rear end of the grounding frame is received by the ground via the crawler support frame and outriggers, and the larger upward force P acting on the hydraulic telescoping legs on both sides.
is suppressed by the weight of the entire hoist, which is centered around the ground contact part of the rear outrigger.

In this case, the hydraulic telescopic support leg connection to the grounding frame can be located closer to the clamp unit lifting cylinder connection than the pin connection at the rear end of the grounding frame within a range that does not interfere with drilling. Despite the low ground height of the top end, the force P
By increasing the moment arm length L, the grounding frame support rigidity of the crawler support frame can be made sufficiently large.

In addition, when the underground drilling equipment is moved to the next drilling location by itself, the hydraulic telescoping support legs of the front outriggers on both sides are retracted to the retracted position, and the grounding frame is moved using the pin connection part at the rear end of the grounding frame as a fulcrum. When lifting the equipment off the ground and transporting it on the road,
The connection between the both-side hydraulic telescopic support legs and the grounding frame is released, and the rear end of the grounding frame is uncoupled from the crawler support frame, and the hoist car is disassembled and transported, and the attachments removed therefrom are transported separately. Furthermore, if the hoist car is to be used for other foundation construction methods, it is only necessary to remove the attachment from the hoist car.

〔Example〕

The figure shows an embodiment of the present invention that allows both vertical drilling and inclined drilling. A lower guide member 2 of the guide frames 1 and 2 is provided, and a piston rod of a clamp unit elevating cylinder 7 whose upper end is pivotally attached 6 to both sides of the clamp unit 5 between the upper and lower guide members. The lower end and
Each of the lower guide members 2 is pivotally mounted on a bracket 10 fixed to a grounding frame 9 by a shaft 8 provided on the diameter line thereof. Reference numeral 11 denotes a hydraulic cylinder that connects both sides of the front ends of the guide frames 1 and 2 and abutments 12 provided on both sides of the front part of the grounding frame 9. By adjusting the hydraulic cylinder 11 to extend or contract, the guide frame can be tilted rearward from the vertical position shown in FIG. 2 using the shaft 8 as a fulcrum.

As shown in FIG. 3, the clamp unit 5 has side segments 5b integrated with a cover 13 of a clamp unit lifting cylinder 7, and both ends of a hydraulic cylinder 14, respectively, at both ends of a rear segment 5a that connects a drive device to be described later. The front segments 5c which are connected to each other are sequentially connected with pins in a chain shape, and the clamp unit is expanded and contracted by the expansion and contraction of the hydraulic cylinder 14, similar to the conventional structure. Each front and rear segment 5a, 5c has an arcuate shoe 16 that can be replaced depending on the outer diameter of the casing tube 15.
The upper and lower guide members 1 and 2 are respectively provided with similar arcuate shoes.

The drive device of the clamp unit 5 includes a piston rod 1 of a double-rod type hydraulic cylinder 18 mounted on the rear end of a cylindrical arm 17 that projects rearward from the grounding frame 9.
9 terminals are fixed respectively, and the other end of the telescopic arm 21 with one end pivotally connected 20 to the cylinder of both rod-type hydraulic cylinders 18 is configured as a fork portion 22, and the fork portion is attached to the rear of the clamp unit 5. It has the same structure as before, with a pivot 23 attached to the segment 5a, and when both rod-type hydraulic cylinders 18 are repeatedly extended and contracted, the telescoping arm 21 is extended and contracted.
The casing tube 15 held and tightened by the clamp unit 5 is alternately rotated left and right, and at the same time, the clamp unit elevating cylinder 7 is allowed to expand or contract.

The upper guide member 1 consists of four arc-shaped segments 1a, 1b, 1c, 1 that are sequentially connected with pins in a chain in a continuous groove provided inside a guide case 24 that is C-shaped in plan.
d (Fig. 4), and the arc-shaped segments 1a and 1d at both ends are connected by a hydraulic cylinder 25, and the hydraulic cylinder 25 is extended to move the entire arc-shaped segment into the guide housing 24. When inscribed in the peripheral wall, the arcuate segment is connected to the casing tube 1.
5 can be raised and lowered freely. Also, when the hydraulic cylinder 25 is contracted and the entire arcuate segment is used to hold and tighten the lower end of the casing tube 15 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 5, the upper and lower casing tubes can be easily disassembled by contracting the clamp unit lifting cylinder 7.

In the underground drilling device shown in FIG. 1, the base end of a mast 29 that can be raised and lowered by a derrick cylinder 28 is mounted on a swivel base 27 that is mounted on a crawler traveling device 26 so as to be able to rotate around an axis 0-0. An earth auger drilling machine is attached to a leader 29a 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 32 suspended via a swivel joint 31 from a winch cable 30 via a pulley at the upper end of the mast, an auger bit 33 fixed to the lower end of the Kelly bar, and a leader 29.
It includes a rotary 34 for driving a kelly bar, which is attached to the shaft 33 so as to be able to rise and fall freely, and a hydraulic cylinder 35, which is attached between the mast 29 and the rotary 34 so as to give a drilling thrust to the augerbit 33. 36 is leader 2
9a is a support arm at the upper end of the Kelly bar that is attached to the upper end of the Kelly bar so that it can be raised and lowered; 37 is a support arm for a hammer grab hanging wire used when drilling a hammer grab instead of earth auger drilling; the support arm 37 is attached to one side of the front of the mast 29 It is pivotably mounted.

The grounding frame 9 is attached to the crawler traveling device 26 by attaching the rear end rising portion 38a of the telescopic arm 38 (FIG. 2) inserted into the cylindrical arm 17 at the rear of the grounding frame and the crawler traveling device 26.
Of the front and rear outriggers 42 and 43 on both sides, the front outrigger 42 is connected to a bracket 40 fixed to the crawler support frame 39 by a detachable pin 41, and is attached to the crawler support frame 39.
A telescopic horizontal beam 44 parallel to the crawler running direction
A vertical hydraulic telescoping support leg 45 is attached to the front end of the hydraulic telescoping support leg 45.
The distance between the telescopic horizontal beams 44, 44 on both sides is set so that both rear sides of the grounding frame 9 can be suppressed as shown by the chain lines in FIG. 3 or as shown in FIG.

Therefore, the mast 29 and the guide frames 1, 2
In order to drill holes in the inclined position shown in FIG. 1, extend the telescopic horizontal beam 44 as shown in the figure, and extend the telescopic arm 38 with respect to the grounding frame 9 as shown by the chain line W in FIG. 3. If drilling is to be performed with the mast and guide frame in the vertical position, the telescoping horizontal beam 44 and the telescoping arm 38 may be retracted as shown in FIG. 5 or 6.

The connection mechanism of the lower end of the hydraulic telescopic support leg to the grounding frame 9 includes a pair of front and rear hooks 46a on the grounding plate 46.
(Fig. 5) is attached, and link rings 47 which can be freely engaged and disengaged are connected to the front and rear hooks 46a of the ground plate placed on the ground frame, respectively, to the connecting fittings 48 on the ground frame side.
Therefore, when each link ring 47 is engaged with the corresponding hook 46a as shown in FIG.
5, the grounding frame 9 or the attachment is lifted from the ground, allowing movement of the underground drilling device.

If the pin hole of the pin 41 that connects the rear end of the grounding frame to the bracket 40 of the crawler support frame is made into a vertical elongated hole 40a, the center of gravity of the attachment will be located in front of the connecting part of the grounding plate of the grounding frame 9. When lifting the grounding frame, the pin 41 is inserted into the elongated hole 4.
By engaging with the upper end of the frame 0a, the grounding frame 9 can be lifted to a substantially horizontal state, making it easy to move.

Further, the rear outrigger 43 has a telescopic horizontal beam 50 that can be extended on both sides attached to the rear end of the frame 49 (FIG. 6) that extends rearward from the crawler support frame 39 in parallel with the crawler running direction. It is preferable to attach vertical hydraulic telescoping support legs 51 to the tips of the two.

In addition, a separable pipe joint is provided in the middle of the hydraulic hose that connects the hydraulic source on the hoist car and the hydraulic cylinders 7, 14, 18, etc. attached to the attachment, so that the hoist car and the attachment can be separated. Of course, it is possible.

〔Effect of the invention〕

According to the present invention, although the casing tube press-fitting and pulling device mounted on the grounding frame is configured to be removably attached to the hoist vehicle as an attachment, the front outrigger attached to the crawler traveling device side is used to The weight of the hoist vehicle, which uses the rear outrigger as a fulcrum, prevents the grounding frame from lifting when the casing tube is pressed in, making it possible to press in and pull out large-diameter casing tubes, and also allowing the hoist vehicle to be used for other construction methods. be.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a side view of its attachment, FIGS. 3 and 4 are XX and YY sectional views of FIG. 2, respectively, and FIG. The figure is a side view of the grounding frame attachment portion to the crawler support frame, and FIG. 6 is a longitudinal sectional side view of the main parts showing the effect of the present invention. 1, 2... Guide frame, 5... Clamp unit, 7... Clamp unit lifting cylinder,
9... Grounding frame, 26... Crawler traveling device, 27
... Swivel base, 29 ... Mast, 32 ... Kelly bar, 34 ... Rotary, 39 ... Crawler support frame, 41 ... Pin, 42, 43 ... Front and rear outriggers, 45 ... Hydraulic telescopic support leg, 46 ... Ground plate, 47...link ring.

Claims (1)

[Claims] 1. A hoisting machine, which is constructed by mounting a swivel platform equipped with a hoist capable of raising and lowering an underground boring tool on a crawler support frame of a crawler traveling device with outriggers attached to both rear sides, and the front part of the crawler support frame. A guide frame that guides the casing tube so that it can move up and down, a drive device that alternately rotates the clamp unit of the casing tube left and right, and a lift cylinder of the clamp unit are connected to a ground frame whose rear end is connected with a pin so that it can move up and down. In an underground drilling device, the lower end can be connected to an intermediate portion of the earthing frame between the clamp unit elevating cylinder connecting portion of the earthing frame and the pin connecting portion at the rear end of the earthing frame. Front outriggers each having a vertical hydraulic telescoping support leg are attached to each of the front sides of the crawler support frame, and the front outriggers are configured to transmit a casing tube press-in reaction force acting on the grounding frame to the crawler support frame. , and the hydraulic telescopic support leg can be freely adjusted to expand and contract between an extended position in which the front part of the hoist car is stably supported on the ground when the attachment is removed, and a contracted position in which the attachment connected to the hoist car is lifted from the ground. An underground drilling device characterized in that the stroke of the hydraulic telescopic support leg is set as follows.