JPS6156751B2 - - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to drilling equipment.

Conventionally, drilling equipment used to drill holes with large diameters and depths in the ground for driving large-diameter foundation piles, etc., is a rotary drive system in which a long pipe with a drilling bit at the lower end is installed in the ground. Some machines are inserted into the ground under their own weight while rotating, but with these conventional drilling equipment, the digging speed is slow, it is difficult to cut long pipes, and it is difficult to adjust the direction and angle of the hole. The drawback is that the accuracy is not good.

The present invention was made in view of these points,
When drilling a hole with a large diameter and depth in the ground, the purpose is to speed up the drilling speed, make it easier to add long pipes, and improve the accuracy of the direction and angle of the hole.

Next, one embodiment of the present invention will be described based on the drawings.

Sprocket wheels 3 and 4 are rotatably supported on the upper and lower ends of a leader 2 which is erected by a base machine 1 consisting of a main body such as a power shovel. A chain 5 is endlessly wound around the foils 3 and 4, and a hydraulic motor 6 for rotating the chain 5 is provided at the bottom of the leader 2.

In addition, the two guide rod portions 11 of the leader 2
The slide base 12 is guided and supported so as to be movable up and down. This slide base 12 rotatably supports rollers 13 having semicircular grooves on both left and right sides at the upper and lower parts, and the inner side of each roller 13 is fitted into the outer side of the guide rod section 11. .

Further, a connecting protrusion 16 integrally protruding from a part of the chain 5 is fitted into the center hole 15 of the slide base 12, and a pin is inserted into the slide base 12 and the connecting protrusion 16. They are integrally connected by 17.

In addition, the recesses 21 and 22 of the slide base 12
The upper and lower convex portions 24 and 25 of the mounting base 23 are fitted into the upper and lower convex portions 24 and 25 of the mounting base 23, and
By inserting pins 26 and 27 into 25, respectively, the slide base 12 and the mounting base 23 are integrated. A cylinder mounting portion 29 that fits into the hole 28 of the slide base 12 is integrally provided at the intermediate portion of the mounting base 23 .

Further, bearing protrusions 31 are provided protruding from the upper and lower parts of one side of the mounting base 23, and the upper and lower bearing protrusions 31
The bearing convex portion 34 protruding from the upper and lower parts of the opening/closing portion 33 integrated with the rotary drive portion main body 32 is connected to the support shaft 3.
It is rotatably supported via 5. In this way, the rotary drive unit main body 32 is provided with respect to the slide base 12 so as to be horizontally openable and closable about the support shaft 35 on one side. In addition, a hydraulic cylinder actuator 37 for opening and closing the rotary drive unit main body 32 with respect to the slide base 12 is connected to the cylinder mounting portion 29 of the mounting base 23 and the mounting plate 3 of the rotary drive unit main body 32.
8. That is, the tip of the piston rod 40 of the hydraulic cylinder actuator 37 is rotatably connected to the cylinder mounting portion 29 via a shaft 39 or the like, and the shaft 4 is connected to the mounting plate 38.
1, etc., the base end of the main body of the hydraulic cylinder actuator 37 is rotatably connected. In addition, on the other side of the mounting base 23 and the opening/closing movement part 33, a pin 43 is provided on the opening/closing movement part 33 via the mounting part 42, and a plate part 44 that fits with this pin 43 is provided on the mounting base 23. When the portion 33 is closed to the mounting base 23, the pin 43 is fitted into the hole in the plate portion 44.

Further, a driving part drain pipe 51 having an open upper end and a lower end is vertically fitted into the rotary driving part main body 32 and is rotatably supported via bearings 52 and 53. A hydraulic motor 54 is provided on the upper surface of the rotary drive unit main body 32.
A pinion 56 is fitted and fixed to the rotating shaft 55 of the hydraulic motor 54, and a gear 57 that meshes with the pinion 56 is fitted and fixed to the outer peripheral surface of the drive section drain pipe 51. Note that these pinions 56 and gears 57
are engaged in oil stored inside the rotary drive unit main body 32, and for this purpose oil seals 58, 59 and a bottom plate 60 which also serves as a bearing holder are provided.

In addition, a drainage swivel joint 64 and a bend pipe 65 are provided at the upper end opening 63 of the drive unit drainage pipe 51.
A drain hose 66 is connected via the drain hose 66. The drainage swivel joint 64 has a joint main body 68 fixed to the upper surface of the rotary drive unit main body 32, and a gasket 69, an O-ring 70, etc. provided between the joint main body 68 and the drive unit drain pipe 51, and A connecting flange body 71 is fixed to the upper end of a joint body 68. Further, a vacuum hose 72 is connected to the bend pipe 65.

Further, the upper end opening of a long drain pipe 77 is integrally connected to the lower end opening 75 of the drive section drain pipe 51 via the inner tube for drainage of the air supply swivel joint 76, and this long drain pipe The upper end opening of an excavation part drain pipe 79 having an excavation bit 78 at its lower end is integrally connected to the lower end opening of the excavation part drain pipe 77 by a flange. Note that an opening is provided at the bottom of the excavation section drain pipe 79.

Further, the guide rod portion 11 of the leader 2 is provided with a steady guide body 81 that rotatably supports the long drain pipe 77. A rotary holder 82 is rotatably fitted into the steadying guide 81, a guide portion 83 that directly fits into the long drain pipe 77 is fitted into the rotary holder 82, and The flange 84 of the guide portion 83 is fixed to the rotation holder 82.

Further, two air supply pipes 87 are integrally provided along the long drain pipe 77, and an air supply hose 88 is connected to the upper end opening of the air supply pipe 87 via the air supply swivel joint 76. The above long drain pipe 77
A plurality of air blowing holes 89 are radially bored diagonally upward from the outer surface to the inner surface in the lower part of the air blowing hole 89. The lower end opening of the trachea 87 is connected. The air supply pipe 87 fits into the guide portion 83.

The hydraulic motors 6 and 54 and the hydraulic cylinder actuator 37 are driven by operating various switching valves of a hydraulic power source provided in the base machine 1 within the operator's cab 91.

Then, the chain 5 is rotated by the hydraulic motor 6, and the rotary drive unit main body 32 is pushed up via the slide base 12 etc., and each drain pipe 51, 77,
79, etc., and at the same time, the hydraulic motor 54 rotates the drive unit drain pipe 51, and the excavation bit 78 is rotated via the drain pipes 77, 79, etc., Drilling work with the drilling bit 78 is performed while the long drain pipe 77 is vertically supported by the guide plate 81.

At the same time, water 96 is poured into a hole 94 drilled in the ground using a water supply hose 95.
6 facilitates excavation, and this water 9
6, the excavated soil is thawed, and the excavated soil and stones are sucked together with water 96 from the lower opening of the excavation section drain pipe 79 by the suction force of a suction pump (not shown) connected to the drain hose 66, and the drain pipes 79 are drained.
9, 77, the air is sucked up through the drainage inner cylinder part of the air supply swivel joint 76 and the drainage pipe 51, and is discharged to the outside through the drainage hose 66.

Furthermore, the suction power of the suction pump has its limits, and if it becomes unable to suck up stones or the like, compressed air can be supplied to the air supply pipe 87 using a compressor (not shown) connected to the air supply hose 88. , a plurality of air blow holes 8 arranged radially.
9 blows air into the water in the long drain pipe 77 from below to above in an overall conical shape, and this air jet flow increases the suction power of water, and even heavy stones etc. It is sucked up along with water and discharged outside.

In addition, when adding the long drain pipe 77, the flange connection between the long drain pipe 77 and the excavation part drain pipe 79 is removed, and the rotating holder 82 and the guide part 83 in the steady guide body 81 are connected. Remove the flange connection between the
2 and the long drain pipe 77 are pulled upward together, and at this time, the long drain pipe 77 and the guide portion 83 engaged with the lower end flange of the long drain pipe 77 are pulled out from the rotating holder 82, and then the opening/closing Piston rod 4 of hydraulic cylinder actuator 37
0, rotate the rotary drive unit main body 32 approximately 90 degrees about the support shaft 35 with respect to the slide base 12 and the mounting base 23, and align the rotary drive unit main body 32 and the long drain pipe 77 with the central axis of the excavation bit 78. Release from above. And the winding drum 98 of the base machine 1
The drilling bit 78 is wrapped around the top of the leader 2
A second long drainage pipe (not shown) is suspended and supported by a hook 100 at the end of a wire rope 99 suspended on the central axis of the excavation section drainage pipe 79. The hydraulic cylinder actuator 3 is connected to the upper end flange, and the rotary drive unit main body 32 and the first long drain pipe 77 are connected to the hydraulic cylinder actuator 3 directly above the second long drain pipe.
7, and the upper end flange of the second long drain pipe and the lower end flange of the first long drain pipe 77 are connected.

Similarly, the third long drainage pipe is interposed between the first long drainage pipe 77 and the second long drainage pipe, and in this way, a plurality of long drainage pipes are arranged according to the excavation depth. Connect sequentially.

In the above embodiment, the air blow hole 89 is provided in the first elongated drain pipe 77, but the air blow hole 89 may be provided in the second elongated drain pipe and thereafter. In that case, by sequentially connecting the air supply pipe provided on each long drain pipe through the connecting flange of each long drain pipe, compressed air can be supplied to the air blowing holes of the second and subsequent long drain pipes. do.

As described above, according to the present invention, since the drilling bit is forcibly pushed down by the endless chain, the drilling speed can be increased. In addition, the main body of the rotary drive unit is provided so that it can be opened and closed horizontally around a support shaft on one side of the slide base, and this is opened and closed by an actuator, so when adding a long drainage pipe, for example, Only the rotary drive unit main body and the first long drain pipe connected to it can escape from the center axis of the drilling bit, and the second long drain pipe can be connected to the excavation part drain pipe, thereby allowing the base There is no need to move the entire machine to remove the rotary drive unit body from the center axis of the drilling bit, and there is no need to move the base machine, which eliminates the trouble and confusion of center alignment with the drilling hole. Further, since the excavation bit is rotated through various drainage pipes, the excavated soil and stones excavated by the excavation bit can be efficiently discharged together with water through various drainage pipes. In addition, since the long drain pipe is rotatably supported by the steady guide, the long drain pipe is supported at two points by the rotary drive unit and the steady guide, and is accurately aligned with the leader. , so that if the leader is erected vertically, a precisely perpendicular drilling will be obtained.

In addition, an air blow hole is drilled diagonally upward from the outer side to the inner side of the long drain pipe, and compressed air is supplied to the outer end of the air blow hole, so that the inside of the long drain pipe is An air jet flow is generated from the bottom to the top, and this air jet flow increases the ability to suck up water in the drain pipe, making it possible to suck up heavy stones and other objects along with the water.

[Brief explanation of the drawing]

The drawings show an embodiment of the excavation device of the present invention, in which Fig. 1 is a front view of the whole, Fig. 2 is a plan view of the rotation drive section, and Fig. 3 is a sectional view of the opening/closing part of the rotation drive main body. FIG. 4 is a cross-sectional view taken along the line -- in FIG. 2, FIG. 5 is a perspective view of the steady guide portion, and FIG. 6 is a cross-sectional view of the air blow hole portion. 1... Base machine, 2... Leader, 3, 4...
... Sprocket wheel, 5 ... Chain, 6 ... Hydraulic motor, 12 ... Slide base, 32 ... Rotation drive unit main body, 35 ... Support shaft, 37 ... Actuator, 51 ... Drive section drain pipe, 54 ... Hydraulic motor, 63 ... Upper end opening, 64 ... Drainage swivel joint, 66 ... Drainage hose, 75 ... Lower end opening, 77 ... Long drainage pipe, 78 ... Excavation bit, 79 ... Excavation Part drainage pipe, 81... Steady guide, 87... Air supply pipe, 76... Air supply swivel joint, 88... Air supply hose, 89... Air blow hole.

Claims (1)

[Claims] 1 Sprocket wheels are rotatably supported on the upper and lower ends of a leader erected by a base machine, and a chain is attached to the sprocket wheels at the upper and lower ends. The chain is wound endlessly, and a hydraulic motor is provided on the leader to rotate the chain.
The slide base is guided and supported by this leader so as to be movable up and down, and the chain is connected to this slide base, and the rotary drive unit main body can be freely opened and closed horizontally about a support shaft on one side with respect to the slide base. and an actuator for opening and closing the rotary drive unit main body relative to the slide base, and a drive unit drain pipe having an open upper end and a lower end is vertically fitted to the rotary drive unit main body to rotatably support the rotary drive unit main body. A hydraulic motor for rotating the drive section drain pipe is installed in the rotary drive section main body, and a drain hose is connected to the upper end opening of the drive section drain pipe via a drainage swivel joint to rotate the drive section drain pipe. The upper end opening of at least one long drainage pipe is integrally connected to the lower end opening, and the upper end opening of an excavation part drainage pipe having an excavation bit provided at the lower end is integrally connected to the lower end opening of this long drainage pipe. An excavation device characterized in that the leader is provided with a steady guide body that rotatably supports the long drain pipe. 2 A sprocket wheel is rotatably supported on the upper and lower ends of a leader erected by a base machine, and a chain is endlessly wound around the sprocket foils at the upper and lower ends. A hydraulic motor for rotating this chain is installed in the leader,
The slide base is guided and supported by this leader so as to be movable up and down, and the chain is connected to this slide base, and the rotary drive unit main body can be freely opened and closed horizontally about a support shaft on one side with respect to the slide base. and an actuator for opening and closing the rotary drive unit main body relative to the slide base, and a drive unit drain pipe having an open upper end and a lower end is vertically fitted to the rotary drive unit main body to rotatably support the rotary drive unit main body. A hydraulic motor for rotating the drive section drain pipe is installed in the rotary drive section main body, and a drain hose is connected to the upper end opening of the drive section drain pipe via a drainage swivel joint to rotate the drive section drain pipe. The upper end opening of at least one long drainage pipe is integrally connected to the lower end opening, and the upper end opening of an excavation part drainage pipe having an excavation bit provided at the lower end is integrally connected to the lower end opening of this long drainage pipe. The leader is provided with a steadying guide for rotatably supporting the long drain pipe, an air supply pipe is integrally provided with the long drain pipe, and an air supply pipe is provided at the upper end opening of the air supply pipe. Connect the air supply hose via a swivel joint, and drill an air blow hole diagonally upward from the outside surface to the inside surface of the long drain pipe, and connect the air supply hose to the outside end of the air blow hole. A drilling device characterized by connecting the lower end opening of the trachea.