JP2962637B2 - Drilling work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is constructed so that a drilling device is suspended vertically from the end of a boom which is freely mounted on a vehicle body, and the ground is excavated vertically by the drilling device. Related to drilling work vehicles.

[0002]

2. Description of the Related Art In such a drilling work vehicle, a drilling means is suspended vertically from a tip end of a boom, and the ground is vertically drilled by a drill bit, a drill, an auger or the like provided at a lower end of the drilling means. It is composed of In addition, a hoisting device is attached to the vehicle body, and the excavating means is suspended from the end of the boom by a wire fed from the hoisting device. The excavating means can be moved up and down, for example, by lowering.

However, since the excavating means is a long one extending vertically, it is difficult to move the excavating means up and down accurately only by hanging it with a wire. And is suspended from the end of the boom. Therefore, these excavating means and the guide device are collectively referred to as a drilling device. As described above, the drilling machine is hung from the tip of the boom. When the drilling work is not performed, the boom and the drilling machine are stored on the vehicle body so that the drilling work vehicle can travel. There is a need.

[0004]

As a method of storing the drilling device, there is a method of removing the drilling device from the end of the boom and placing the drilling device on a vehicle body for storage, but the drilling device itself requires a considerable weight. There is a problem that a large number of man-hours are required for attaching and detaching the well, and also a large number of man-hours are required for loading and unloading the removed drilling device on the vehicle body. A method is also conceivable in which a hydraulic cylinder or the like for storing the drilling device is provided between the drilling device and the boom, and the drilling device is stored using the hydraulic cylinder. However, the mechanism for disposing the hydraulic cylinder is complicated,
There is a problem that the cost and weight of the entire apparatus increase.

The present invention has been made in view of such a problem.
An object of the present invention is to provide a drilling work vehicle capable of storing a drilling device with a relatively simple device.

[0006]

In order to achieve the above object, a drilling work vehicle according to the present invention cuts from the tip of a boom which is freely undulated on a support frame mounted on a vehicle body. The well device is configured to be suspended vertically. A storage sheave is rotatably attached to the lower end of this well drilling device, and a wire fed from a hoisting device provided on the vehicle body is connected to a rotating sheave rotatably attached to the end of the boom and a storage sheave. It is configured such that it can be hung around a sheave and its tip can be locked to a support frame.

[0007]

In the drilling work vehicle having the above-mentioned structure, the wire fed from the hoisting device in a state where the drilling device is suspended vertically from the end of the boom is transferred to the rotary sheave and the storage sheave at the end of the boom in this order. When the wire is wound by a hoisting device after the tip is locked to the support frame, the lower end of the drilling device is drawn toward the support frame while the upper end is locked to the boom. In this way, by turning the drilling device sideways and simultaneously lowering the boom, the drilling device can be stored horizontally on the vehicle body. When the stored drilling device is used, the reverse operation may be performed.

[0008]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a drilling work vehicle according to the present invention. In this drilling work vehicle, a horizontally rotatable swivel 2 (support frame) is mounted on a vehicle body 1b having a cabin 1a, and an extensible boom 3 is mounted on the swivel 2 so as to be able to move up and down. The drilling device D is suspended from the tip.

The telescopic boom 3 includes a base boom 3a mounted on the swivel base 2 so as to be able to move up and down, and a distal boom 3b mounted telescopically and telescopically with respect to the base boom 3a.
The up / down operation is performed by the up / down cylinder 4, and the expansion / contraction operation is performed by the built-in expansion / contraction cylinder (not shown). Outriggers 8 that support the vehicle body 1b at the time of work are attached to four front, rear, left and right portions of the vehicle body 1b. An operator's seat 6 is provided on the rear side of the cabin 1a, and an operation lever 7 is provided to face the seat 6. The operator operates the operation lever 7 while sitting on the seat 6 to perform various operations. For example, a turning operation of the swivel base 2, an up / down operation of the telescopic boom 3, and an expanding / contracting operation, a winch operation operation described later, and the like are performed.

A main winch 10 and a sub winch 15 are connected to the upper surface of the base end boom 3a. The main and sub-wires 12, 17 fed from these drums 11, 16 are wound around sheaves 5a to 5d rotatably attached to a boom head 5 fixed to the tip of a tip boom 3b as shown in the figure. Droop.

The main wire 12 is wrapped around a dynamic sheave 32 a at the upper end of the well drilling device D, and its tip is locked by a suspension head 21 attached to the boom head 5.
For this reason, if the drive of the main winch 10 is controlled to control the feeding of the main wire 12 from the main drum 11, it is possible to perform the raising and lowering control of the excavator 30 constituting the drilling machine D. The tension detecting mechanism 60 for detecting the tension of the main wire 12 is provided on the base end boom 3a.
Are provided, but the explanation for this will be omitted.
The sub-wire 17 has a hook 18 at its tip and is hung down from the boom head 5 and is used for lifting various equipment.

The well drilling device D includes the drilling device 30 vertically suspended and supported by the main wire 12 as described above, and the leader frame 20 for guiding the drilling device 30. FIG. 4 is an enlarged view of the upper part of the well drilling device D suspended from the tip of the boom 3 and will be described with reference to FIG. FIG. 1 is a view from the front, while FIG. 4 is a rear view.

The leader frame 20 includes a boom head 5.
A suspension head 21 pivotally supported by a pin 21a, a frame head 22 having a connection portion 22a pivotally connected to the suspension head 21, and a suspension head 21 integrally connected to the suspension head 21. It comprises a first frame 23 extending vertically downward, a second frame 25 detachably connected to the first frame 23, and a third frame 26 detachably connected to the second frame 25. The connecting portion 22a is formed hollow, and the main wire 12 extends downward through the hollow space 22b of the connecting portion 22a, extends around the moving sheave 32a, extends upward, and again passes through the hollow space. Locked to the suspension head 21.

As described above, the frame head 22 is horizontally rotatable with respect to the suspension head 21, but the frame head 22 is provided with a rotation positioning mechanism 70 for positioning and holding the frame head 22 at an arbitrary rotation position. As shown in FIG. 5, the turning positioning mechanism 70 includes a lever 71 having one end 71a pivotally supported by the frame head 22.
A lock pin 72 provided in the middle of the lever 71 and protruding upward, a tension spring 74 that pulls the lever 71 upward, and a lock release rope 73 that is connected to the other end 71 b of the lever 71 and hangs downward. Is done. Note that a handle 73 is provided at the lower end of the unlocking rope 73.
a is attached, and a guide 75 for guiding the rope 73 is provided on the way.

On the other hand, the suspension head 21 includes an upper head pivotally supported by the boom head 5 and a lower head 21a pivotally supported by the upper head. , A plurality of positioning holes 21b are formed. The lock pin 72 of the turning positioning mechanism 70 faces the positioning hole 21b, and when the tension spring 74 raises the lever 71, the lock pin 72 protrudes into the positioning hole 21b. As a result, the frame head 22 is prevented from turning with respect to the suspension head 21 and is locked and held.

Here, when the lock release rope 73 is pulled down with the handle 73a, the lever 71 is pulled down, and the lock pin 72 comes out of the positioning hole 21b. In this state, the frame head 22 (and the first to third frames 23, 25, 26 connected thereto) can freely pivot with respect to the suspension head 21, and can pivot to any position. Then, after turning to the desired position, when the pull-down of the lock release rope 73 is released, the lever 71 is pulled up by the tension spring 74, and the lock pin 72 protrudes into the corresponding positioning hole 21b at this turning position. In this turning position, the frame head 2
2 is locked.

As shown in FIG. 2, the first to third frames 23, 25 and 26 are respectively provided on both side edges of one side surface (side surface facing the excavator 30) of a hollow columnar main body having a rectangular cross section.
A guide rail 23a made of a vertically extending hollow pipe,
25a and 26a are joined. These main body and guide rail have the same cross-sectional shape, respectively.
One vertically extending guide frame is formed in a state where the first to third frames 23, 25, 26 are connected.

In the leader frame 20, the suspension head 21, the frame head 22, and the first frame 23
Are connected as shown and used while attached to the boom head 5, and are stored on the vehicle body 1b. However, the second and third frames 25 and 26 are assembled and used as shown in the work. For this reason, as shown in FIG. 2, for example, a connection hole 23b is formed in a lower portion of the first frame 23, and a connection protrusion 25b having a connection hole 25c is provided in an upper portion of the second frame 25.
A connection protrusion 25d is also provided above the guide rail 25a of the second frame 25. In FIG. 2, a storage sheave 24 is attached to a lower part of the first frame 23.

When connecting the second frame 25 to the first frame 23, the connecting projection 25b is connected to the first frame 23.
And the connecting projection 25d is fitted into the guide rail 23a of the first frame 23. In this state, the connecting bolt 28 is inserted through the connecting holes 23b and 25c, and the nut is fastened with the nut 29. . When the second frame 25 is connected to the first frame 23 in this manner, the boom 3 is raised and extended to lift them, and then the third frame is similarly placed on the lower portion of the second frame 25.
The frame 26 is connected. After being connected in this manner, the lower portion of the third frame 26 is used by grounding, so that a ground plate 26b is attached to the lower end of the third frame 26.

The excavator 30 includes guide rails 23a, 2
The first to third support guides 31a, 31b, 31c are movably supported up and down along the leader frame 20 by first to third support guides 31a, 31b, 31c movably mounted up and down with respect to 5a, 26a. For example, as shown in FIG. 2B, the first support guide 31a is attached so as to sandwich the guide rail 23a, and is movable on the guide rail 23a.

A power swivel 33 is mounted on the first support guide 31a by being pivotally supported by a pin 33a, and a support member 32 connected to the power swivel 33 so as to be horizontally pivotable is mounted thereon. The moving sheave 32a is rotatably attached to the support member 32. For this reason, together with the frame head 22, the first
When the frame 23 is turned, the first support guide 31 a is also turned around the vertical center axis of the power swivel 33 together with them. At this time, the first support guide 3
Although the power swivel 33 is turned together with 1a, the support member 32 is held as it is.

The power swivel 33 is composed of a hydraulic motor and a speed reducer. Hydraulic hoses and tubes 57a, 57b, 57c for supplying drive hydraulic pressure to the hydraulic motor are provided.
Are connected to the power swivel 33 as shown. The hydraulic pressure is supplied from a hydraulic power unit (not shown) provided in the vehicle body 1b.

An air swivel 35 is connected below the power swivel 33 via a connecting tube 34. The air swivel 35 is supported by the leader frame 20 via the second support guide 31b. The air swivel 35 is rotatably supported by the second support guide 31b. Therefore, when the second frame 25 is turned together with the frame head 22, the second support guide 31 b is turned together with these around the vertical center axis of the air swivel 35.

The air swivel 35 is connected to the lubricator 5 via air hoses and tubes 54a, 54b, 54c.
2 and further from the lubricator 52 to the air compressor 50 via the air hose 51. For this reason, the compressed air supplied from the air compressor 50 is sent to the lubricator 52, where lubricating oil is mixed in a mist state, and then supplied to the air swivel 35. The lubricator 52 is provided with an on / off valve for controlling on / off of the supply of the compressed air, and an operating device 53 for remotely controlling the operation of the on / off valve is provided with the lubricator 52.
It is arranged above.

A lower portion of the air swivel 35 has a discharge port 36 for discharging slime (a mixture of earth and sand and oil) generated by excavation to the outside, and a pipe P is attached to a lower end of the air swivel 35 by screw connection with a taper screw or the like. I have. The pipe P is rotatably supported at an intermediate portion by a third support guide 31c.

A connecting rod 38 extends downward from the inside of the air swivel 35 through the inside of the pipe P. At the lower end of the connecting rod 38, as shown in FIG. . The connecting rod 38 has a passage for guiding the compressed air supplied to the air swivel 35 to the air hammer excavator B, and the compressed air drives the air hammer excavator B. Further, a drive shaft of the power swivel 33 extends in the connection tube 34 and is connected to the connection rod, and the power swivel 33 rotates the entire air hammer excavator B via the connection rod.

As shown in FIG. 3, the air hammer excavator B includes an air hammer mechanism 40, a hammer rod 41 vertically moved by the air hammer mechanism 40, and a drill bit 42 connected to a lower end of the hammer rod 41. Be composed. The air hammer mechanism 40 continuously vibrates the drill bit 42 up and down via the hammer rod 41 by compressed air. A plurality of protrusions 42 a are provided on the lower surface of the drill bit 42, and the protrusion 42
a continuously collides with the ground, and gives a striking vibration to crush the ground. At this time, the power swivel 33 simultaneously rotates the entire air hammer device B gently.
The collision position of a changes according to this rotation, and the ground is gradually excavated into a cylindrical shape.

The air supplied to the air hammer mechanism 40 to move the excavation bit 42 up and down is blown to the lower surface of the excavation bit 42, and the recess 42b on the side surface of the excavation bit 42 is provided.
Flows upward through the space surrounded by the outer peripheral surface of the air hammer mechanism 40 and the connecting rod 38 and the inner peripheral surface of the pipe P, and flows out of the discharge port 36 to the outside. At this time, the lubricating oil mixed into the compressed air performs a lubricating action on the collision portion between the projection 42a and the ground, and mixes with the excavated earth and sand to form slime, thereby preventing the crushed earth and sand from scattering as dust. I do. The slime is discharged to the outside through the discharge port 36 together with the compressed air.

The excavating bit 42 is configured so as to be able to expand and contract (fold) in the radial direction. When the excavating bit 42 is rotated in the excavating direction by the power swivel 33, the excavating bit 42 expands to the state shown in FIG. Drill a hole slightly larger than the outer diameter of P. When the excavation is completed, when the excavation bit 42 is rotated in the reverse direction by the power swivel 33, it is folded and reduced in the radial direction, and the outer diameter of the pipe P
Smaller than the inner diameter of Therefore, after removing the screw connection between the pipe P and the air swivel 35, the entire excavator 30 is pulled up, leaving only the pipe P in the ground and excavating the excavator 30.
Can be removed. As a result, the well can be excavated in a form in which the pipe P is buried vertically.

After the well is excavated in this way, the boom 3 and the well drilling device D are stored on the vehicle body. This will be described with reference to FIGS. 6 and 7. 6 shows a state at the start of storage, and FIG. 7 shows a storage state (a state in which the vehicle can travel).

To store the drilling device D, first, the second and third frames 25,
26 is removed, and the main wire 12 is wound up by the main winch 10 to raise the excavator 30 to a position near the suspension head 21. Before or after this, the tip boom 3b is reduced to the end. Next, the sub-winch 15 is driven to draw out the sub-wire 17 wound on the drum 16, and the sub-wire 17 hanging from the sheave 5c of the boom head 5 is stored in the lower end of the first boom 23 as shown in FIG. The hook 18 of the sub-wire 17 is hooked on the locking member 2 a of the swivel 2 while being hung around the sheave 24.

Then, when the sub-wire 17 is wound around the drum 16 by driving the sub-winch 15 (arrow B), the entire drilling machine D moves toward the swivel 2 around the pivot pin 21 a with the boom head 5. (In the direction of arrow C). In parallel with the winding by the sub winch 15, the telescopic boom 3 is caused to fall (operation in the direction of arrow A). By performing such an operation, finally, as shown in FIG. 7, the well drilling device D is placed on the vehicle body 1 b with the drilling device D laid down, and the telescopic boom 3 is stored in a state where it is laid down. Can be. Thereafter, if the outrigger 8 is pulled up, the drilling work vehicle is in a state where it can travel. In addition, if the operation | movement reverse to the above is performed from the state stored as shown in FIG.

[0033]

As described above, according to the present invention,
A wire fed from a hoisting device provided on the vehicle body is wrapped around a rotating sheave and a storage sheave at the end of the boom, and the end can be locked to a support frame that supports the boom so that the boom can be raised and lowered. With the drilling device suspended vertically from the end of the boom, the wire fed from the hoisting device is wrapped around the rotating sheave and the storage sheave at the end of the boom, and the tip is engaged with the support frame. When the wire is wound by the hoisting device after stopping, the lower end of the drilling device is drawn toward the support frame while the upper end is locked by the boom. In this way, by turning the drilling device sideways and simultaneously lowering the boom, the drilling device can be stored horizontally on the vehicle body. When the stored drilling device is used, the reverse operation may be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a drilling work vehicle provided with a guide device according to the present invention.

FIG. 2 is a perspective view and a cross-sectional view showing a leader frame used in the drilling work vehicle.

FIG. 3 is a partial sectional view showing the air hammer excavator attached to a lower end of a pipe.

FIG. 4 is a rear view showing the periphery of a boom tip of the well drilling vehicle.

FIG. 5 is a perspective view showing a turning positioning mechanism.

FIG. 6 is a front view showing a state when the storage of the well device is started in the well working vehicle.

FIG. 7 is a front view showing a state where the storage of the well drilling device is completed in the well drilling work vehicle.

[Explanation of symbols]

 2 swivel base 3 telescopic boom 10 main winch 12 main wire 15 sub winch 17 sub wire 20 leader frame 24 storage sheave 30 excavator 33 power swivel 35 air swivel 40 air hammer mechanism 50 compressor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 62-176284 (JP, U) JP-A 62-94184 (JP, U) JP-A 35-27401 (JP, U) JP 2 29988 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21B 7/02

Claims (1)

(57) [Claims] 1. A boom disposed at least on a support frame mounted on a vehicle body so as to be able to move up and down, a drilling device suspended at the tip of the boom and suspended vertically. A storage sheave rotatably attached to the lower end, a hoisting device disposed on the vehicle body, a rotating sheave unreeled from the hoisting device and rotatably attached to the end of the boom, and the storage A wire that is hung around a sheave for use and has a wire whose front end can be locked to the support frame.