JP2761231B2 - Fluid ejection side hole drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fluid pipe such as a gas pipe or a water pipe buried underground, or a pipe for accommodating a power line, an optical or electric signal line, a power line, or the like. In a horizontal hole drilling device that excavates a relatively small diameter horizontal hole such as a horizontal hole for constructing a hole or a horizontal hole for discharging water, a fluid ejection type horizontal hole drilling device that excavates while ejecting a fluid such as water from the tip of an auger. .

(Prior Art) The present inventors have developed a side-hole excavator capable of excavating the above-described underground pipe horizontal hole without excavating a groove in a road or the like. This side-hole excavator reciprocates a rotary drive having a rotary chuck device for gripping an auger on a guide frame, and performs excavation while extending an auger having a screw blade in a screw type with reciprocation. It is.

When digging with such a side-hole drilling device, if the geology to be excavated is clayey or hard earthen clay with a high viscosity, the excavation resistance will be large and the direction of the hole will bend or In some cases, the situation becomes impossible. In order to overcome such a situation, the present inventor has already developed a water injection type lateral hole excavator for excavating while extruding water from the tip of the auger to soften excavated soil. In this water supply device, a water passage hole is provided at the center of the auger, a seal ring is interposed between the auger of the auger and the mounting tube of the auger and the rotary chuck device, and a drill bit of the auger at the tip is provided. The rotary drive device and the rotary chuck device are provided with a water ejection port and a passage for supplying water from a water supply source into the auger.

(Problems to be Solved by the Invention) However, in the device developed earlier, if the leading auger is removed from the rotary chuck device at the time of auger augmentation, even if the water supply pump is stopped, the rotary drive device reaches from the ground. Water remaining in the water supply hose etc. leaks from the connection port (water supply port) with the auger provided in the rotary chuck device, and the bottom of the vertical hole or groove where the horizontal hole drilling device is installed will be drained, deteriorating the work environment. There was a problem.

The present invention has been made in consideration of the above-described problems, and does not prevent fluid remaining in a fluid hose or the like from leaking into a vertical hole or a bottom of a groove when an auger is added, and that a horizontal hole is disturbed by ejected fluid. It is an object of the present invention to provide a fluid ejection type side hole excavator without any fluid.

(Means for Solving the Problems) In order to achieve this object, the present invention grasps an extended auger by a rotary chuck device provided in a rotary drive device of an auger, and places the rotary drive device on a guide frame. An apparatus for reciprocating and excavating a lateral hole while adding an auger, wherein the rotary chuck device is accommodated in the rotary drive device so as to be moved forward and backward by an actuator, and is rotated by a motor. A rotating block and a plurality of chuck claws which are radially slidably mounted on the rotating block, and which are opened and closed as the sliding block advances and retreats.
The rotary block is provided with a hole for passing a fluid to be passed through the auger and ejected from the tip of the auger. The slide valve is configured to close and open the on-off valves in conjunction with the movement of the chuck jaws in the opening and closing directions of the sliding block, respectively.

Example An example of the present invention will be described below with reference to the drawings. 2 and 3 show the overall configuration of one embodiment of the lateral hole drilling system according to the present invention, and FIG. 4 is a plan sectional view of the lateral hole drilling device. 2 to 4, reference numeral 1 denotes an underground pipe, 2 denotes a vertical hole excavated to a depth reaching the underground pipe 1, 3 denotes a casing fitted into the vertical hole 2, and 4 denotes a vertically movable inside the casing 3. Side drilling equipment to be installed, 5 is casing 3
The operation device 6 installed above is a water supply device installed above the ground. Two guide rails 7 are provided on the casing 3 and the frame 8 of the operating device 5 so as to be opposed to each other. A guide roller 10 for rolling along the rail 7 is mounted. A guide frame 11 is attached to a lower portion of the portal frame 9.

The guide frame 11 has an opening 12 provided in the casing 3.
A parallel guide rail 13 is fixed so as to face the guide rail, and the rotation driving device 15 of the auger 14 has two guide rollers 16 attached to the left and right sides thereof in a freely rotatable manner along the guide rail 13. By being combined, it is movably installed on the guide frame 11. The rotary drive device 15 has a rotary chuck device 17 for gripping the tail end 14a of the auger 14 at the front, and a rotary hydraulic motor 18 for rotating the auger 14.

FIG. 1 is a cross-sectional view showing the internal configuration of the rotary drive device 15. A drive gear 30 attached to an output shaft of the auger rotation hydraulic motor 18 meshes with a receiving gear 32 rotatably attached to a case 31, The receiving gear 32 is rotatably fitted via a bearing 75 to a cylindrical body 35 in which a flange 35 a is fixed to a case 31 with a bolt 74. Reference numeral 33 denotes a chuck pawl opening / closing hydraulic cylinder attached to the flange 35a by bolts 76. A piston rod 34 of the hydraulic cylinder 33 slidably penetrates the cylindrical body 35, and a bearing is provided at a tip of the piston rod 34. A sliding block 40 is rotatably mounted via 36. The receiving gear 32 has a rear rotating block 38 for holding a chuck pawl 39 with a bolt 37.
And the front rotation block 54 (the front and rear rotation blocks 5
4 and 38 may be configured as an integral block. ), And three chuck claws 39 are radially slidably mounted on the front and rear rotating blocks 54 and 38, as shown in FIG. The rear rotation block 38 accommodates the slide block 40 slidably in the axial direction of the piston rod 34. As shown in FIGS. Of the chuck claws 39 are slidably engaged with the inverted T-shaped inclined sliding legs 39a. The rotation of the hydraulic motor 18 causes the gears 30, 31 and the post-rotation. The rotary chuck device 17 including the block 38, the chuck pawl 39 and the sliding block 40 rotates, and the sliding block
40 is configured to move, and the chuck claws 39 are opened and closed. In the present example, the chuck jaws 39 are configured to be opened by advancing the piston rod 34.On the contrary, the direction of the inclined surface of the sliding block 40 is reversed so that the piston rod 34 Chuck claw 39 due to advance
Can be closed.

Further, as shown in FIGS. 3 and 4, a traverse hydraulic motor 19 for reciprocating the rotary drive device 15 is provided on a side portion of the rotary drive device 15. The pinion 20 attached to the output shaft is engaged with a rack 21 provided in parallel with the guide rail 13, and the rotation drive device 15 is reciprocated by forward and reverse rotation of the hydraulic motor 19.

In FIG. 4, reference numeral 22 denotes a fixed chuck device mounted on the front portion of the guide frame 11, which is partially buried in the ground when the auger 14 is removed and, if necessary, when the auger is added. The tail end 14a of the preceding auger 14 is gripped. The fixed chuck device 22 is a tail end of the auger 14.
A pair of claws 23, 24, which are openably and closably mounted so as to be able to grip and release 14a, and left and right hydraulic cylinders 25, 26 for opening and closing.
And link mechanisms 27 and 28 for transmitting the movements of the respective piston rods to the claws 23 and 24, respectively.

As shown in FIGS. 2 and 3, the operating device 5 includes switches for operating the auger rotating hydraulic motor 18, the chuck pawl opening / closing hydraulic cylinder 33, and the hydraulic cylinders 25 and 26 of the fixed chuck device 22. An operation panel 42, an operation lever 43 for operating the traversing hydraulic motor 19, a winch 44 for raising and lowering the side hole drilling device 4, a hydraulic hose 45 connected to each actuator of the side hole drilling device 4, a lighting lamp, a limit switch, and the like. Reels 46 and 4 for winding cables
And a control device 48 containing a switching valve and the like inserted between a power supply or a hydraulic power source mounted on a work vehicle or the like (not shown) and an actuator of the horizontal hole drilling device 4.

Next, a water supply system for ejecting water from the tip of the auger 14 will be described. As shown in FIG. 1 and FIG.
14 has a tail end 14a formed into a female screw, and a tip 14b formed into a male screw that is screwed into the female screw.
A water hole 50 is provided at the center of the water passage. In a state where the seal ring 51 made of rubber or the like is fitted to the extension portion of the auger 14 and the auger is extended, the leading auger 14A (in the illustrated example, the excavation bit 14A at the tip is shown,
Similarly, the seal ring 51 is sandwiched between the subsequent auger 14 and the subsequent auger 14 to exhibit a sealing effect.

As shown in FIGS. 1 and 5, at the center of the front rotation block 54, there is integrally provided a cylindrical mounting cylinder 55 into which the female screw hole at the tail end of the auger 14 is fitted. A seal ring 56 made of rubber or the like is fitted around the root portion, and the seal ring 56 is sandwiched between the tail end of the auger 14 held by the rotary chuck device 17 and the mounting cylinder 55. A sealing effect is exerted.

The case 31 of the rotary drive device 15 and the rotating body therein include:
A passage for supplying water to the auger 14 is provided.
The passage is provided in the case 31, and is connected to a water supply hole 59 connected to a water supply hose 57 through a connection fitting 58, and slides between the water reception hole 32 and the receiving gear 32 on the inner surface of the case 31. A groove 60 provided in the surface in the circumferential direction, a water hole 61 provided in the radial direction on the receiving gear 32 so as to communicate with the groove 60, and a receiving gear 32 so as to communicate with the water hole 61, A water hole 62 provided in the block 38 and the front rotation block 54 in the axial direction, and the water hole 62 and the mounting cylinder
A water passage hole 63 provided in the front rotation block 54 in the radial direction so as to communicate with the water passage hole 50C at the center of the hole 55.

Reference numeral 77 denotes an on-off valve constituted by the mounting cylinder 55 and a rod-shaped valve element 78 fixed to the tip of the piston rod 34 by screwing or the like, and as shown by a solid line, a sliding block together with the piston rod 34. When the chuck 40 is retracted and the chuck 39 is closed, that is, when the tail end 14a of the auger 14 is
9, the water passage hole 50C of the mounting cylinder 55 is opened, and in a state where the piston rod 34 is advanced and the chuck pawl 39 is opened, the valve body 78 is mounted as shown by a two-dot chain line. The configuration is such that the water hole 50c of the 55 is closed, that is, the on-off valve 77 is opened and closed in conjunction with the sliding block 40.

Reference numeral 53 denotes a rubber check valve attached to the back of the female screw hole at the tail end 14a of the auger 14.

As shown in FIG. 2, the water supply device 6 includes an electric or hydraulic motor 66 installed on a base 65, a water supply pump 67 such as a screw pump driven by the motor, and a water supply pump depending on the quality of excavated soil. Equipment for dissolving stable liquids such as bentonite that changes viscosity etc.
68 (69 is a stirring blade, 70 is a stirring motor), and a water supply hose 71 connected to a discharge side of a water supply pump 67 has a stop valve 72, and the water supply hose 71 is Operation device 5
The water supply hose 57 is wound around the reel 73, and is connected to a stationary shaft side of a reel 73 installed on the frame 8 of
The reel 73 is provided with a tension applying device (not shown) such as a mainspring spring.

In this apparatus, when the auger is added, the side hole excavator 4 is pulled up by the winch 44, and the screw hole of the tail end 14a of the next auger 14 is fitted into the mounting cylinder 55 in a state where the rotary drive unit 15 is retracted. Then, by closing the rotary chuck device 17, the auger 14 is gripped, and the side hole drilling device 4 is lowered until it is locked by a stopper (not shown) in the casing 3, and is partially buried in the ground. Leading auger 14
In response, the traversing hydraulic motor 19 is operated to
By moving the auger 14 forward by driving the auger rotation hydraulic motor 18 while moving the auger 15 forward,
The male screw of the 14 tip 14b is screwed into the female screw of the tail end 14a of the preceding auger 14. Subsequently, by opening the stop valve 72 and operating the water supply pump 67, the drill bit 14 at the tip of the auger 14 is
Water is flowed out from the jet port 50B of A by the feedwater pressure against the elasticity of the check valve 53, and excavation is performed while softening the soil facing the tip of the auger 14. Therefore, even when excavating clay, excavation can be performed by advancing the auger 14 straight. At this time, by adjusting the mixing amount of the stabilizing solution in the stabilizing solution dissolving device 68, water (stabilizing solution) having a viscosity corresponding to the earth and sand is supplied, and stable excavation becomes possible.

When the auger 14 is extended as described above, the gripping of the tail end 14a of the preceding auger 14 by the rotary chuck device 17 is released, and the tail end 14a is removed from the mounting cylinder 55.
When opening the piston rod 34 and sliding block 40
The valve 78 is attached to the mounting cylinder
Since the blockage 55 is closed, the water remaining in the water supply hose 57 and the like does not leak from the water passage hole 50c to the bottom of the vertical hole 2, and the bottom of the vertical hole is prevented from being drained.

Further, in this embodiment, since the check valve 53 is provided at the tail end of the auger, there is no possibility that the water in the auger 14 flows backward and leaks to the bottom of the vertical hole 2 when the water supply is stopped. In addition, since a seal ring 51 is provided at the extension of each auger 14,
There is no leakage of supply water from the joint between the 14 and the seal ring 56 is also provided at the root of the mounting cylinder 55 of the rotary chuck device 17.
Is provided, leakage from the portion of the rotary chuck device 17 is also prevented, and water can be effectively supplied from the drill bit 14A.

Although the present invention has been described above with reference to the embodiments, the present invention is also applicable to a case where the excavation is performed by automatically extending an auger and installing an auger automatically or vertically in a vertical hole or a groove such as an existing manhole. Applicable. Further, the mechanism for opening and closing the on-off valve 77 in conjunction with the sliding block 40 does not directly attach the valve body 78 to the sliding block 40 or the piston rod 34, but utilizes the inclined surface of the sliding block 40. Sliding block, such as moving a valve body biased by a spring against the force of the spring.
A configuration in which a valve body provided separately from 40 or the like is moved may be adopted. Further, a configuration is also adopted in which water is not jetted from the tip of the auger 14 but is jetted with compressed air.
In addition, the present invention may use a gas such as air or the like as water to be jetted out of the water, in this case, it is possible to prevent disturbance of the horizontal hole due to fluid jets during excavation interruption,
By activating and stopping the fluid supply driving device in conjunction with the on-off valve, power loss is reduced.
Various changes and additions can be made to the structure, combination, and the like of the constituent members other than the above-described embodiment without departing from the gist of the present invention.

(Effects of the Invention) As described above, in the present invention, the rotary block is provided with a hole for supplying fluid to be passed through the auger and ejected from the auger tip, and an opening / closing valve is provided in a part of the hole. The on-off valve is linked with the sliding block, the chuck pawl is opened,
The on-off valve is closed and opened in conjunction with the closing, so if a liquid such as water is used as the fluid ejected from the auger, when the auger is added to the bottom of a vertical hole or groove for excavating a horizontal hole The liquid does not accumulate due to liquid leakage from the fluid supply hose or the like, thereby avoiding deterioration of the working environment. In addition, when a gas such as air is used as the ejection fluid, it is possible to prevent disturbance of the horizontal hole due to ejection of the fluid during excavation interruption, and to operate the fluid supply driving device in conjunction with the on-off valve. By causing the stop, power loss is reduced. In addition, since the on-off valve is automatically opened and closed with the opening and closing of the chuck jaws, there is no need for an operator to operate the on-off valve, and there is no increase in labor required for work, which is very useful in practice. It is.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a rotary drive unit which is a main part of a fluid ejection type side hole drilling apparatus according to the present invention, and FIG. 2 shows a side hole drilling system provided with the rotary drive unit of the embodiment. Side sectional view, FIG. 3 is a front sectional view of a main part of the system, FIG. 4 is a plan sectional view of a rotary driving device of the embodiment,
FIG. 5 is a front view of the rotary chuck device of the embodiment, and FIG. 6 is a cross-sectional view showing an engagement structure between the sliding block and the chuck pawl of the embodiment.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takenori Uchida 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Toshiyuki Nakanishi 5-1-1 Hiranocho, Higashi-ku, Osaka, Osaka, Osaka Within Gas Co., Ltd. 56) References JP-A-1-39490 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21B 7/04 E21B 17/02 E21B 7/18

Claims (1)

(57) [Claims] 1. An apparatus for gripping an extended auger by a rotary chuck device provided on a rotary drive of an auger, reciprocating the rotary drive on a guide frame, and excavating a lateral hole while extending the auger. The rotary chuck device includes a sliding block accommodated in the rotary driving device so as to be advanced and retracted by an actuator, a rotary block rotated by a motor, and a radially slidable slide on the rotary block. And a plurality of chuck claws which are opened and closed as the sliding block advances and retreats, wherein the rotating block is provided with a fluid to be passed through the auger and ejected from the auger tip. A hole is provided for passage, an opening / closing valve is provided in a part of the hole, and a valve body of the opening / closing valve is attached to the sliding block. A fluid ejection type side hole excavator, wherein the valve body is closed and opened in conjunction with movement of the valve body by movement and movement in a closing direction.