JPH02213583A - Fluid spray type horizontal hole drilling device - Google Patents

Abstract

PURPOSE:To eliminate fluid leakage and prevent the deterioration of the working environment and the loss of power by providing holes on rotary blocks and closing or opening an opening/closing valve provided on part of them interlockingly with a sliding block when chuck claws are opened or closed. CONSTITUTION:A rotary chuck device is constituted of a sliding block 40 reciprocated by an actuator, rotary blocks 38 and 54 rotated by a motor, and multiple chuck claws 39 and 39. holes 50c, 59, 60-63 through which the fluid sprayed from the tip of an auger 14 passes when the rotary blocks 38 and 54 pass through the auger 14 are provided. An opening/closing valve 77 is provided on part of them, and it is closed or opened interlockingly with the sliding block 40 when the chuck claws 39 and 39 are opened or closed. The leakage of the remaining fluid when the auger 14 is extended can be avoided.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to fluid pipes such as gas pipes and water pipes buried underground, power lines, and optical and electric signal lines.

In horizontal hole drilling equipment that excavates relatively small diameter horizontal holes, such as horizontal holes for constructing pipes to accommodate power lines, etc., or horizontal holes for discharging water, fluid that performs excavation while spouting fluid such as water from the tip of the auger. Regarding a blowout type horizontal hole drilling device.

(Prior Art) The present inventors have developed a horizontal hole drilling device capable of excavating the above-mentioned horizontal hole for underground pipes without excavating a trench in a road or the like. This horizontal hole drilling device reciprocates a rotary drive device having a rotary chuck device for gripping an auger on a guide frame, and excavates while screwing an auger having screw blades along with the reciprocating movement. It is.

When drilling with such a horizontal hole drilling device, if the geology to be drilled is clayey or hard soil with a high degree of cohesiveness, such as the Dotan layer, the drilling resistance will be large and the direction of the hole may curve or bend.
A situation may occur in which excavation becomes impossible. In order to overcome this situation, the present inventor has already developed a water-injection type horizontal hole excavation device that ejects water from the tip of an auger to soften excavated soil while excavating. This water supply device is
A water hole is installed in the center of the auger, and the joint part of the auger and
The auger and the rotary chuck device are installed by interposing a seal ring between the cylinder and providing a water spout at the cutting bit of the auger at the tip, and a passage for supplying water from a water supply source into the auger. , which is provided in the rotary drive device and the rotary chuck device.

(Invention or problem to be solved) However, what was developed later was that when adding an auger,
When the leading auger is removed from the rotary chuck device, even if the water supply pump is stopped, the water remaining in the water supply hose, etc. that runs from the ground to the rotary drive device will drain into the connection port (water supply port) with the auger provided on the rotary chuck device. There was a problem in that the water leaked out and flooded the bottom of the vertical hole or trench where the horizontal hole drilling equipment was installed, worsening the working environment.

In view of the problem described in (a), the present invention prevents the fluid remaining in the fluid hose etc. from leaking to the bottom of the vertical hole or groove when the auger is added, and the horizontal hole is not disturbed by the ejected fluid. The object of the present invention is to provide a fluid jetting type horizontal hole drilling device that will never cause problems.

(Means for Solving the Problem) In order to achieve this object, the present invention grips the second auger by a rotary chuck device provided on the rotary drive device of the auger, and holds the second auger on the guide frame of the rotary drive device. While reciprocating, a horizontal hole is excavated while adding an auger. The device includes a sliding block housed in the rotary chuck device or the rotary drive device so as to be moved forward and backward by an actuator, a rotary block rotated by a motor, and a sliding block radially slidable on the rotary block. A plurality of chuck claws are movably mounted and are opened and closed as the sliding block advances and retreats,
The rotary block is provided with a hole through which fluid passes through the auger and is ejected from the auger tip, an on-off valve is provided in a part of the chain hole, and the on-off valve is interlocked with the sliding block.

It is characterized in that the opening/closing valve is configured to close and open when the chuck jaw opens and closes, respectively.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 2, 3, and 3 show the overall configuration of an embodiment of the horizontal hole drilling system according to the present invention, and FIG. 4 is a plan sectional view of the horizontal hole drilling apparatus. In Figures 2 to 4, l is an underground pipe, 2 is a vertical hole excavated to a depth that reaches the underground pipe l, and 3
4 is a casing fitted into the vertical hole 2, 4 is a horizontal hole drilling device installed in the casing 3 so as to be able to move up and down, 5 is an operating device installed on the casing 3, and 6 is a water supply device installed on the ground. Two guide rails 7 are provided on the casing 3 and the frame 8 of the operating device 5 so as to face each other, and the guide rails 7 are provided above and below the left and right columns of the circular frame 9 that constitutes the horizontal hole drilling equipment M4. A guide roller 10 is installed to roll along the line 7. Further, a guide frame 11 is attached to the lower part of the portal frame 9.

The guide frame 11 has an opening 1 provided in the casing 3.
A parallel guide rail 13 is fixedly installed so as to face the auger 14, and the rotary drive device 15 of the auger 14 has two parallel guide rails 13 on the left and right.
The individually attached guide rollers 16 are movably installed on the guide frame 11 by being engaged along the guide rail 13 so as to be movable. The rotational drive device δ
15 has a rotary chuck device 17 at the front portion that grips the tail end 14a of the auger 14, and a rotation hydraulic motor 18 that rotates the auger 14.

FIG. 1 is a cross-sectional view showing the internal structure of the rotary drive device i15, in which a drive gear 30 attached to the output shaft of the auger rotation hydraulic motor 18 meshes with a receiving gear 32 rotatably attached to the case 31. The receiving gear 32 has a flange 3 on the case 31.
5a is rotatably fitted onto the cylindrical body 35 fixed to a bolt 74 via a bearing 75. Reference numeral 33 denotes a hydraulic cylinder for opening and closing the chuck claw attached to the collar 35a with bolts 76. A piston rod 34 of the hydraulic cylinder 33 slidably penetrates the cylinder 35, and the piston rod 3
A sliding block 40 is rotatably attached to the tip of 4 via a bearing 36. A bolt 37 is attached to the receiving gear 32.
A rear rotation block 38 and a front rotation block 54 that hold the chuck jaws 39 (these front and rear rotation blocks 54 and 38 may be constructed as an integrated block).
As shown in FIG. 5, three chuck claws 39 are attached to the front and rear rotating blocks 54, 38 so as to be slidable radially. Said rear rotation block 3
8, the sliding block 40 is housed so as to be slidable in the axial direction of the piston rod 34, and as shown in FIG.
As shown in FIG. 6, the slope %@40a provided around the sliding block 40 is slidably engaged with the inverted T-shaped sloped sliding leg 39a of each of the chuck claws 39. Rotation of the hydraulic motor 18 causes the gears 30, 31 to
The rotary chuck device 17 consisting of a rear rotation block 38, a chuck claw 39, a sliding block 40, etc. rotates, and the sliding block 40 moves due to the expansion and contraction of the hydraulic cylinder 33, so that the chuck claw 39 opens and closes. There is. In this example, the chuck claws 39 are configured to open as the piston rod 34 moves forward; however, by reversing the direction of the inclined surface of the sliding block 40, the piston rod 34 opens. It is also possible to have a configuration in which the chuck claws 39 are closed by forward movement.

Further, as shown in FIGS. 3 and 4, a traverse hydraulic motor 19 for reciprocating the rotary drive device 15 is provided on the side of the rotary drive device 15. The binion 20 attached to the output shaft is connected to the guide rail 13.
The hydraulic motor 1 is engaged with a rack 21 provided parallel to the
The rotary drive device 15 is configured to reciprocate by the forward and reverse rotation of the rotary shaft 9.

In Fig. 4, 22 is a fixed chuck device attached to the front part of the guide frame 11, and this is partially buried in the ground when the auger J4 is removed and, if necessary, when the auger is added. This is to hold the tail end 14a of the leading auger 14 that is being held. The fixed chuck device 22 includes a pair of claws 23 and 24 that are attached to open and close the tail end 14a of the auger 14 so as to be able to grip and release it, left and right hydraulic cylinders 25 and 26 for opening and closing, and their respective Vislon rods. a link mechanism 2 that transmits the movement of
7.28.

As shown in FIGS. 2 and 3, the operating device 5 includes the auger rotation hydraulic motor 18, the chuck claw opening/closing hydraulic cylinder 33, and the hydraulic cylinder 25 of the fixed chuck device 22.
．． 26, an operating lever 43 for operating the traverse hydraulic motor 19, a winch 44 for raising and lowering the horizontal hole drilling device 4, and a hydraulic hose 45 connected to each actuator of the horizontal hole drilling device 4. A switch inserted between reels 46 and 47 for winding cables connected to lighting lights, limit switches, etc., the power source or hydraulic power source mounted on a work vehicle, etc. (not shown), and the actuator of the horizontal hole drilling device 4. Control device 48 containing valves etc.
and has.

Next, a water supply system for spouting water from the tip of the auger 14 will be described. As shown in FIGS. 1 and 2, each auger 14 has a tail end 14a formed with a female thread, and a tip 14b.
is formed on a male thread that is screwed into the female thread, and a water passage hole 50 is provided in the center of each auger 14. In addition, a seal ring 51 made of rubber or the like is fitted to the connecting part of the auger 14, and when the auger is connected, the leading auger 14A (the illustrated example shows the cutting bit 14A at the tip, but the relay auger 14A is shown). The seal ring 51 is held between the rear auger 14 and the rear auger 14, and the sealing action is exerted.

As shown in FIGS. 1 and 5, the center of the front rotation block 54 has a cylindrical mounting tube 55 that fits into the female screw hole at the tail end of the auger 14, and the electric material is connected to the tube. A seal ring 56 made of rubber or the like is fitted around the root portion of the auger 1 held by the rotary chuck device alt17.
4 and the mounting tube 55.
The sealing effect is exerted by being pinched.

A passage for supplying water to the auger 14 is provided in the case 31 of the rotary drive device 115 and the rotating body therein. The passage includes a water hole 59 provided in the case 31 and connected to the water supply hose 57 via a connecting fitting 58;
The receiving gear 32 on the inner surface of the case 31 communicates with the water passage hole 59.
A groove 60 provided in the circumferential direction on the sliding surface of the receiving gear 32, a water passage hole 61 provided in the radial direction in the receiving gear 32 so as to communicate with the groove 60, and a water passage hole 61 provided in the receiving gear 32 in the radial direction so as to communicate with the water passage hole 61. 32° A water passage hole 62 provided in the axial direction in the rear rotation block 38 and the front rotation block 54, and a water passage hole 62 provided in the front rotation block 54 in the front so as to communicate between the water passage hole 62 and the water passage hole 50C in the center of the cylinder 55. It consists of water holes 63 provided in the rotation block 54 in the radial direction.

Reference numeral 77 designates an on-off valve that is constructed of the cylinder 55 and a loft-shaped valve body 78 that is fixed to the tip of the piston rod 34 by screwing or the like, and as shown by the solid line, it slides together with the piston rod 34. When the block 40 is retracted and the chuck claw 39 is closed, that is, the tail end 1 of the auger 14
4a is gripped by the chuck claw 39, the water passage hole 50C of the cylinder 55 is opened, and when the piston port 34 is moved forward and the chuck claw 39 is opened,
As shown by the two-dot chain line, the valve body 78 is mounted so as to close the water passage hole 50c of the cylinder 55, that is, the on-off valve 77 is opened and closed in conjunction with the sliding block 40.

53 is a rubber check valve attached to the inner part of the female screw hole of 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 table 65, a water supply pump 67 such as a screw pump driven by the electric or hydraulic motor 66, and water supply depending on the quality of the excavated soil. The water supply hose 71 connected to the discharge side of the water supply pump 67 has a stop valve. 72, the water supply hose 71
is connected to the stationary shaft side of a reel 73 installed on the frame 8 of the operating device 5, the water supply hose 57 is wound around the reel 73, and the reel 73 is equipped with a tensioning device such as a spring spring. (not shown).

In this device, when adding an auger, the horizontal hole drilling device 4 is pulled up by the winch 44, and with the rotary drive device 15 retracted, the screw hole in the tail end 14a of the primary auger 14 is inserted into the tube 55. , and by closing the rotary chuck device 17, the auger 14 is gripped and the horizontal hole drilling device 4 is lowered until it is stopped by a stopper (not shown) in the casing 3. With respect to the leading auger 14, the traverse hydraulic motor 19 is operated to advance the rotary drive device 15, and the auger rotation hydraulic motor 18 is operated to rotate the auger 14 in the forward direction. The male thread at the tip 14b is screwed into the female thread at the tail end 14a of the leading auger 14. Next, by opening the stop valve 72 and operating the water supply pump 67, the water supply pressure causes water to flow out from the spout 50B of the drilling bit 14A at the tip of the auger 14 against the elasticity of the check valve 53. , excavation is performed while softening the earth and sand facing the tip of the auger 14. Therefore, even when excavating clay, it is possible to excavate by moving the auger 14 straight forward. At this time, by adjusting the mixing amount of the stabilizing liquid in the stabilizing liquid dissolving device 68,
Water (stabilizing liquid) with a viscosity depending on the soil and sand is supplied, allowing stable excavation or turning.

When adding the auger 14 as described above, the grip of the tail end 14a of the leading auger 14 by the rotary chuck device 17 is released, and the tail end 14a is removed from the cylinder 55 for installation, but when opening the chuck claw 29, , since the piston rod 34 and the sliding block 40 are moved forward, in conjunction with this,
The valve body 78 is installed to close the cylinder 55, so the water supply hose 5
The wood remaining in the vertical hole 2 will not leak from the water hole 50c to the bottom of the vertical hole 2, and the bottom of the vertical hole will be prevented from becoming soaked with water.6 In addition, in this embodiment, the check valve 53 is Since it is provided at the tail end, there is no risk that the water in the auger 14 will flow backwards and leak into the bottom of the vertical hole 2 when the water supply is stopped. In addition, since a seal ring 51 is provided at the joint part of each auger 14,
There is no leakage of water supply from the joint between the augers 14, and since a seal ring 56 is also provided at the base of the tube 55 for mounting the rotary chuck device 17, leakage from the rotary chuck device 17 is also prevented. Therefore, water can be effectively supplied from the drilling bit 14A.

Although the present invention has been described above with reference to embodiments, the present invention can also be applied to equipment that is installed in a vertical hole or trench such as an existing manhole in a stationary or elevating manner, or when excavation is performed by automatically adding an auger. Applicable. Furthermore, the mechanism for opening and closing the on-off valve 77 in conjunction with the sliding block 40 utilizes the inclined surface of the sliding block 40, rather than attaching the valve body 78 directly to the sliding block 40 or the piston rod 34, etc. It is also possible to use a configuration in which a valve body provided separately from the sliding block 40 or the like is moved, such as by moving a valve body urged by a spring against the force of the spring. Furthermore, instead of ejecting water from the tip of the auger 14, a configuration is also adopted in which water is ejected together with compressed air. Furthermore, in the present invention, a gas such as air may be used in addition to water as the jetting fluid, and in this case, it is possible to prevent disturbances in the side hole due to fluid jetting during interruption of excavation, and the on-off valve and the By interlocking the operation and stopping of the fluid supply drive device, loss of power is reduced. In addition, various changes and additions can be made to the structure, combination, etc. of each component other than the above-described embodiments without departing from the gist of the present invention.

(Effects of the Invention) As described above, in one aspect of the present invention, a hole is provided in the five-rotation block for supplying fluid to be passed through the auger and ejected from the tip of the auger, and an on-off valve is provided in a part of the chain hole. The opening/closing valve is linked to the sliding block, and the opening/closing valve is closed and opened in conjunction with the opening and closing of the chuck jaw, respectively, so that a liquid such as water can be used as the fluid ejected from the auger. In this case, liquid does not accumulate at the bottom of a vertical hole or groove for horizontal hole drilling due to liquid leakage from a fluid supply hose or the like when replenishing the auger, and deterioration of the working environment can be avoided. Also,
When a gas such as air is used as the ejected fluid, it is possible to prevent disturbances in the side hole due to the ejected fluid during excavation interruptions, and it is also possible to operate and stop the fluid supply drive device in conjunction with the on-off valve. By doing so, power loss is reduced. In addition, since the on-off valve opens and closes automatically as the chuck jaw opens and closes, there is no need for the worker to operate the on-off valve, which does not increase the labor involved in the work, which is extremely useful in practice. It is.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of a rotary drive device which is a main part of a fluid jet type horizontal hole drilling device according to the present invention, and FIG. 2 shows a side hole drilling system equipped with the rotary drive device of the embodiment. 3 is a front sectional view of the main parts of the system; FIG. 4 is a plan sectional view of the rotary drive device of the embodiment;
FIG. 5 is a front view of the rotary chuck device of this embodiment, and FIG. 6 is a sectional view showing the engagement structure of the sliding block and chuck claw of this embodiment. Patent applicant: Nippon Telegraph and Telephone Corporation and two other agents Patent attorney: Masami Akimoto and one other person Figure 3: Water hole 4: Lateral hole drilling device 11 Guide frame 17: Rotary chuck device 9m 40: Sliding block

Claims (1)

[Claims] An apparatus for excavating a horizontal hole while reciprocating the auger by gripping a replenishing auger by a rotary chuck device provided on a rotary drive device of the auger, reciprocating the rotary drive device on a guide frame, and excavating a horizontal hole while replenishing the auger. A chuck device includes a sliding block housed in the rotary drive device so as to be moved forward and backward by an actuator, a rotating block rotated by a motor, and a chuck device mounted on the rotating block so as to be slidable radially. , consisting of a plurality of chuck claws that are opened and closed as the sliding block advances and retreats, wherein the rotary block is provided with a hole through which fluid passes through the auger and is ejected from the auger tip. , a fluid jetting device characterized in that an on-off valve is provided in a part of the hole, and the on-off valve is interlocked with the sliding block so that the on-off valve closes and opens when the chuck jaw opens and closes, respectively. Type horizontal hole drilling equipment.