JP2807312B2 - Side hole drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a telephone line buried underground, a signal line, a power line, or other accommodation pipe, or a gas pipe, a water pipe, etc. The present invention relates to a side hole excavator using a screw extension type excavator for excavating a relatively small diameter side hole.

(Prior Art) A conventional horizontal hole drilling device using a screw extension type drilling tool inserts a casing into a vertical hole, mounts a lifting frame on the inner surface of the casing, and drives the drilling tool provided on the lifting frame to rotate. The device and a traversing device of the rotary drive device perform the excavation with the drilling tool, and a rotary chuck device for gripping a rear end provided on the rotary drive device, and a rear end of a preceding drilling tool provided at a front end of the lifting frame. The opening and closing operation of the fixed chuck device for gripping allows the excavation tool to be extended and excavation to proceed.In addition, in order to efficiently attach and detach the excavation tool while the elevating frame is lowered, the An excavating tool elevating device that raises and lowers the excavating tool holder between the vicinity of the ground and the elevating frame; and an excavating tool gripping tool. (See Japanese Patent Application No. 1-31108).

(Problems to be Solved by the Invention) When excavating a horizontal hole for burying a new pipe extending from a main pipe buried in a road to a residence premises, for example, by using such a side hole excavating apparatus, a depth reaching the main pipe is required. From the excavated vertical hole, a horizontal hole leading to the vertical hole provided on the site is excavated.However, in order to make the vertical hole provided on the site shallow and achieve labor saving, it is necessary to excavate upward with the horizontal hole inclined. is there. To this end, it is conceivable to divide the elevating frame into a support frame mounted in the casing and a guide frame tiltably mounted on the support frame, and mount the various devices on the guide frame. However, in such a configuration, the excavating device elevating device including, for example, a hydraulic cylinder or the like for transporting the excavating device between the ground and the horizontal hole excavating device main body at the bottom of the vertical hole hits the casing when the guide frame is inclined. Since the guide frame is in contact with the guide frame and cannot be further tilted, the amount of tilt becomes small, and the intended purpose cannot be achieved.

In view of the above problems, the present invention provides a horizontal hole drilling device that includes a drilling device lifting device and allows the drilling device to be extended and collected while the main body portion of the horizontal hole drilling device is lowered to the bottom of the vertical hole. It is an object of the present invention to provide a structure capable of excavating a formed side hole.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a horizontal hole drilling device using a screw extension type drilling tool, wherein a casing inserted into a vertical hole, and mounted in the casing. A support frame, a guide frame that is tiltably attached to the support frame, a rotary driving device for an excavator mounted on the guide frame, a traversing device that moves the rotary drive forward and backward, and the rotary drive. A rotary chuck device attached to the device for detachably gripping the rear end of the drilling tool; and a rotary chuck device mounted to the front portion of the guide frame and holding the rear end of the preceding drilling tool when the drilling tool is extended or detached. A fixed chuck device which is held on an axis, and which is installed on the support frame, and in a state where the support frame is lowered, the excavator receiver is placed near the ground and the casing. An excavating tool elevating device for elevating the excavating device between the excavating device, an excavating device attaching / detaching device for moving an excavating device gripper between the excavating device receiver and the excavating device mounting position on the rotary chuck device, and the guide frame. And a drive device for tilting the support frame with respect to the support frame.

(Operation) Since the present invention has the above-described structure, the guide frame is kept horizontal by a driving device provided between the guide frame and the support frame when the rotary chuck device holds the excavator, The gripper of the drilling tool attachment / detachment device is turned upward, and the gripping tool is opened, and the drilling tool held and lowered by the holder of the drilling tool lifting / lowering device is gripped by the gripping tool. By doing so, the drilling tool gripped by the gripper is positioned concentrically in front of the rotary chuck device, the rotation drive device is advanced by the operation of the traversing device, and the rear end of the gripper is gripped by the rotary chuck device. . Thereafter, the digging tool attaching / detaching device is returned to its original position and retracted, and the guide frame is tilted by the operation of the driving device, and the following digging tool held by the rotary chuck device is rotated with respect to the preceding digging tool. Excavation is performed by connecting the drive unit to the rotary chuck device and moving forward. After excavation corresponding to one excavator is performed, the excavator is released from the rotary chuck device, the rotary drive device is retracted, and the guide frame is leveled to prepare for the above-described excavator extension operation.

After digging the inclined horizontal hole, even when performing digging tool collection, the work of transferring the digging tool held by the rotary chuck device to the digging tool attaching / detaching device and the work of transferring the digging tool from the digging tool attaching / detaching device to the digging tool elevating device are performed. If so, make the guide frame horizontal.

(Embodiment) Hereinafter, an embodiment of a lateral hole excavator of the present invention will be described with reference to the drawings. 1 is a side sectional view showing a side hole excavator in a working state, FIG. 2 is a front sectional view of the same, and FIG. 3 is A in FIG.
FIG. 4 is a cross-sectional view of FIG. 4A, and FIG.

In FIGS. 1 and 2, A is a vertical hole excavated from the ground to a predetermined depth, 1a and 1b are casings pushed into the vertical hole A, and have an appropriate length according to the depth of the vertical hole A. One or more objects are combined, and the uppermost casing 1a is supported on a circular base 1c placed on the ground to prevent immersion. Each casing 1a, 1b has a 90
As shown in FIG. 3, four guide rails 5A to 5D are vertically fixed at locations separated from each other by welding or the like. Each of the guide rails 5A to 5D has a right angle at the tip of the horizontal section, and the guide rails 5A to 5D are adjacent to each other but parallel to each other. Also, the center between the guide rails 5A and 5B at the lower end of the lower casing 1b, the center between the guide rails 5B and 5C, and the guide rail 5A
At the center between 5D, notch-shaped excavating tool insertion openings 9A, 9B, and 9C are provided, respectively.

Reference numeral 2 denotes an elevating frame including a gate-shaped support frame 3 and a guide frame 4 attached thereto. The support frame 3 has left and right foot portions 3c and 3d, and left and right pillar portions 3a and 3b each having an L-shaped cross section are integrally connected to each rear portion thereof. As shown in FIG. 3, the width W in the front-rear direction (excavation direction) of the bottoms 3c and 3d of the support frame 3 is set slightly smaller than the interval X between the opposing surfaces of the guide rails 5A to 5D. Foot 3 between rails 5A-5D
c and 3d can be inserted, and at the time of insertion, the front ends of the feet 3c and 3d and the back surfaces of the pillars 3a and 3b are configured to be in sliding contact with the opposing surfaces of the guide rails 5A to 5D.

Between the left and right feet 3c and 3d of the support frame 3, the guide frame 4 on which the rotary drive device 7 of the excavating tool 8 such as a screw auger is mounted so as to be able to run freely is connected at the center by a connecting tool 6. As a result, the guide frame 4 is pivotally attached to the feet 3c and 3d. Reference numeral 15 denotes a hydraulic cylinder provided as a driving device for setting the posture of the guide frame 4 to either horizontal or inclined. The hydraulic cylinders 15 are provided as a pair of left and right sides, and upper ends thereof are pinned to the support frames 3a and 3b. Then, the lower end is attached to the guide frame 4 by pinning.

As shown in FIG. 2 and FIG.
A pair of guide rails 10, 10 are fixed in the longitudinal direction, and grooves formed on the outer periphery of a guide roller 11 attached to four corners on the lower surface of the rotary drive device 7 are fitted to the guide rail 10. The rotary drive 7 is positioned and movable by the guide rail 10.

A traverse hydraulic motor 12 for traversing the rotary drive device 7 is attached to the frame of the rotary drive device 7, and a pinion 13 rotated by the hydraulic motor 12 meshes with a rack 14 fixed to the guide frame 4. Let me.

The rotary drive device 7 has a hydraulic motor 7a for rotating the excavating tool and a rotary chuck device 7b rotated by the rotary motor 7a, and has a built-in mechanism (not shown) for opening and closing the rotary chuck device 7b. In other words, the rotary chuck device 7b slidably fits a plurality of chucking claws into a plurality of radially-extended bottom grooves formed on the rotating body rotated by the hydraulic motor 7a. The claw is moved in the radial direction by a cylinder (not shown) to grip and release the grip 8a (see FIG. 4) of the excavator 8.

As shown in FIG. 3, a fixed chuck device 16 for extending a drilling tool is attached to an end of the guide frame 4. The fixed chuck device 16 includes a guide frame 4
A pair of left and right hydraulic cylinders 1 with the body side pinned to
7, 18 and the gripper 8a at the rear end of the digging tool held at the front end of the guide frame 4 so as to be able to approach and separate from each other.
And links 21 and 22 for converting the expansion and contraction of the hydraulic cylinders 17 and 18 into opening and closing operations of the gripping claws 19 and 20.

1 and 2, reference numeral 24 denotes a frame installed on the casing 1a. The frame 24 includes an elevating winch 25 of the elevating frame 2, an operation switch device 26, and a traverse and rotation operation lever 27. And an electrical control device 28A. The support frame 3 is equipped with a hydraulic system and a control device 28B for excavating air (spouted from the tip of the excavating tool 8). A hydraulic power source, a power supply and a compressor are provided in the work vehicle, but none of them is shown.

The wire rope 31 to be wound and fed to the winding drum of the elevating winch 25 is hung on a sheave 32 attached to the center of the upper frame 3 e of the support frame 3, and the end is connected to the frame 24.

In FIGS. 1 and 2, reference numeral 40 denotes an excavator attachment / detachment device. The device 40 includes an excavator receiver 60 (61) attached to the upper end of an excavator elevating hydraulic cylinder 56 provided on the foot 3d. Is a telescopic rod which is arranged in parallel with the hydraulic cylinder 56 and expands and contracts at the same time. The telescopic rod 61 holds the horizontal attitude of the receiving member 60) and excavates between the rotary chuck device 7b of the rotary drive device 7. It is for attaching and removing tools.

As shown in FIG. 1 and FIG.
Is a bracket bolted onto the guide frame 4
41 and a hydraulic rotary cylinder mounted on the bracket 41
42, and a pair of rotating arms 44 attached to a rotating shaft 43 protruding from both ends of the rotating cylinder 42.
At the tip of 44, a pair of grippers 46, 47 having an arc-shaped cross section
Are mounted so as to be opened and closed by a hydraulic cylinder 50 around pins 48 and 49 at both ends. As shown in FIG. 1, the rotating arm 44 is moved from a position indicated by a solid line receiving the excavating tool 8 held by the receiving tool 60 to a position indicated by a two-dot chain line which is a concentric position in front of the rotary chuck 7b. It is configured to be rotatable in a range of about 180 degrees.

As shown in FIG. 1, FIG. 2 and FIG. 4, the excavating tool receiver 60 includes a male screw portion 8b at the front end of the excavating tool 8 and a female screw tube portion at the rear end (a gripping tool by the rotary chuck device 7b). 8a is fitted with a support arm 60 having a semicircular recess formed therein.
a, 60b.

When excavating a horizontal hole from vertical hole A using this device,
The casings 1b and 1a are inserted into the vertical hole A so that the opening 9A faces the target point. In addition, lift frame 2
In the state of being pulled up into the inside 24, the rotary chuck device 7b grips the drilling tool 8A with a bit (see FIG. 1), and turns the winch 25 in the lowering direction to fix the stopper 57 fixed on the inner surface of the casing 1b.
The support frame 3 is lowered until it is locked, and the hydraulic cylinder 15 for tilting is extended to move the guide frame 4 to the position shown in FIG.
It is inclined as shown by the dashed line d. Then, the traversing hydraulic motor 12 is operated in the forward direction to advance the rotary drive 7 until it reaches the front end position of the guide frame 4, and at the same time, the hydraulic motor 7a of the rotary drive 7 is rotated forward to perform excavation.

After that, open the rotary chuck device 7b and open the drilling tool with bit.
8A is released, the traversing hydraulic motor 12 is operated in the backward direction, and the rotary drive unit 7 is retracted to the rear end position of the guide frame 4. Then, the tilt hydraulic cylinder 15 is contracted to level the guide frame 4 as shown by the solid line in FIG.

On the other hand, the hydraulic cylinder 56 is extended to raise the digging tool receiver 60 to the ground position, and a worker on the ground places the digging tool 8 on the digging tool receiver 60 and contracts the hydraulic cylinder 56,
The drilling tool 8 is lowered. At this time, as shown by the solid line in FIG. 2, the turning arm 44 of the excavating tool attaching / detaching device 40 is tilted to the casing 1b side, and the gripping tools 46, 47 are kept open as shown by the two-dot chain line b. Then, the excavating tool 8 is lowered into the holding tools 46 and 47.

Next, after the hydraulic cylinder 50 is extended and the drilling tool 8 is gripped by the grippers 46 and 47, the rotary cylinder 42 is first operated to rotate the rotary arm 44 as shown by a two-dot chain line a in FIG. The drilling tool 8 is thereby moved to the rotary chuck device 7b.
In front of each other with their axes aligned. Next, the rotary driving device 7 is slightly advanced, and the rotary chuck device 7b is closed, so that the gripping portion 8a of the drilling tool 8 is gripped by the rotary chuck device 7b.

Next, the hydraulic cylinder 50 is contracted to release the gripping of the excavating tool 8 by the gripping tools 46 and 47, and the rotating cylinder 42 is operated to retract the gripping tools 46 and 47 toward the casing 1b. Then, the tilt hydraulic cylinder 15 is extended to tilt the guide frame 4 as shown by a two-dot chain line d in FIG.

Next, the rear end of the drilling tool with bit 8A is gripped by the fixed chuck device 16, the rotary driving device 7 is moved forward, and the drilling tool 8 with bit is rotated forward to thereby rotate the drilling tool with bit 8A. The front-end male screw portion 8b of the following excavation tool 8 is screwed into the grip portion 8a which is the rear-end female screw cylinder portion, and the following excavation tool 8 is connected. Excavation of the side hole is performed by the forward rotation of 8.

By repeating such operations, the excavation is performed up to the vertical hole or the groove (not shown) excavated at the end point of the horizontal hole excavation. In the case where the excavation ground is hard, for example, the preceding excavation tool is securely held on the ground, so that the fixed chuck device 16 does not necessarily need to grip the rear end of the preceding excavation tool.

The excavation tools 8A and 8 are made hollow depending on the geology and the like, and excavation is performed while squeezing compressed air or water from the tip of the excavation tool 8A.

Next, the operation of collecting the excavating tool 8 will be described. First, remove the drilling tool with bit 8A and connect the end of a buried pipe (not shown) to be inserted into a lateral hole drilled at the front end of the drilling tool 8,
Alternatively, the drilling bit at the tip of the drilling tool with bit 8A is removed, the end of the buried pipe is connected, and the rotary drive device 7 holding the rear end of the last drilling tool 8 by the rotary chuck device 7b,
The traversing hydraulic motor 12 is moved backward by operating it in the backward direction.

Next, the preceding drilling tool 8 is fixed by the fixed chuck device 16.
Rotation drive 7 until the rear end grip 8a can be gripped.
Is stopped when it is retracted, the rear end of the preceding drilling tool 8 is gripped by the fixed chuck device 16, and the hydraulic motor 7a
Is rotated in the reverse direction to reverse the excavating tool 8 held by the rotary chuck device 7b, and the rotary driving device 7 is retracted so that the excavating tool 8 gripped by the rotary chuck device 7b is buried in the ground. From the drilling rig. And
The inclination hydraulic cylinder 15 is contracted to level the guide frame 4.

Next, the rotary cylinder 42 in the state of the solid line in FIG. 2 is rotated to set the posture of the rotary arm 44 to the state of the two-dot chain line, and the gripper 4 is held by the drilling tool 8 gripped by the rotary chuck device 7b.
6 and 47, and extend the hydraulic cylinder 50 to
Is gripped by the grippers 46 and 47. Subsequently, the rotary chuck device 7b is opened, and the rotary drive device 7 is retracted. Then, by operating the rotary cylinder 42 and changing the posture of the rotary arm 44 to the state shown by the solid line in FIG. 2, the grippers 46 and 47 holding the drilling tool 8 are moved to the position of the drilling tool receiver 60. The gripping tools 46 and 47 are opened by contracting the hydraulic cylinder 50.

Next, by extending the hydraulic cylinder 56, the digging tool 8 is pushed up to the ground together with the digging tool receiver 60, and the worker collects the digging tool 8 on the ground. Then, by contracting the hydraulic cylinder 56 again, the digging tool receiver 60 is
Lower to positions 46 and 47.

Next, the tilt hydraulic cylinder 15 is extended again to tilt the guide frame 4, and the rotary drive device 7 is advanced by the operation of the traverse hydraulic motor 12, and the rear end 8 a of the excavating tool 8 exposed in the vertical hole A Is held by the rotary chuck device 7b, and the drilling tool 8 is recovered by the same operation as described above. Such an operation is performed until the tip of the buried pipe is exposed in the vertical hole A.

When excavating a horizontal hole in the direction perpendicular to the existing horizontal hole after excavating the horizontal hole in this manner, the casings 1a and 1b are left inserted in the vertical hole A, and the elevating frame With 2 pulled into frame 24,
The frame 24 is lifted together with the lifting frame 2 by a lifting device provided in the work vehicle, and rotated by 90 degrees while being lifted, and the legs 3d and 3c of the support frame 3 are respectively connected between the guide frames 5A and 5B and between 5C and 5D. (Or 3c, 3d), and set the frame 24 on the casing 1a.
(Or 9C), the digging tool 8 is taken in and out, and the same digging and digging tool collection work as described above are performed.

In this way, it is possible to switch excavation work in different directions without pulling out the casings 1a and 1b.

In the above embodiment, the inclination angle of the guide frame 4 is fixed. However, the inclination angle may be adjusted by providing an adjustable stopper or the like that can regulate the operating range of the hydraulic cylinder or the like. .

(Effects of the Invention) According to the present invention, a guide frame is mounted on a support frame mounted in a casing so that a horizontal position and an inclined position can be selected by a driving device, and an excavator lifting device is installed on the support frame. Then, an excavating tool attachment / detachment device is attached to the guide frame, and when the excavating tool is transferred between the rotary chuck device and the receiving device of the excavating tool elevating device, the guide frame is made horizontal, and the driving device guides the excavating tool during excavation. Since the frame is inclined, the excavator raising / lowering device always takes a vertical position. The inclination angle can be freely selected.

Also, regardless of the depth of the vertical hole and the inner diameter of the casing, there is no danger that the excavator raising and lowering device will come into contact with the casing, and the diameter and depth of the vertical hole or the casing can be freely selected, and economically under optimal conditions. Side hole excavation can be performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a lateral hole excavator according to the present invention in a working state, FIG. 2 is a front sectional view of the same, and FIG.
FIG. 4 is a cross-sectional view taken along the line AA of FIG. 2, and FIG.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Susumu Adachi 4-1-2, Hiranocho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Sadao Kono 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nippon Telegraph and Telephone Corporation (72) Inventor Takenori Uchida 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Shinya Okumura 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi, Ltd. (72) Inventor Takeo Iida 650, Kandachi-cho, Tsuchiura-shi, Ibaraki Pref. Hitachi Construction Machinery Engineering Co., Ltd. (56) References JP-A-2-213583 (JP, A) Japanese Utility Model Application Sho 61-26786 (JP) , U) (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/06 311

Claims (1)

(57) [Claims] In a horizontal hole drilling apparatus using a screw extension type drilling tool, a casing inserted into a vertical hole, a support frame mounted in the casing, and a guide tiltably attached to the support frame. A frame, a rotary driving device for the drilling tool installed on the guide frame, a traversing device for moving the rotary drive forward and backward, and a detachable grip for the rear end of the drilling tool attached to the rotary driving device. A rotating chuck device, a fixed chuck device attached to a front portion of the guide frame, and holding the rear end of the preceding drilling tool on the axis of the rotating chuck device when the drilling tool is extended or detached, and on the support frame. An excavator lifting device that is installed and that raises and lowers the excavator receiver between near the ground and the inside of the casing when the support frame is lowered; A digging tool attachment / detachment device for moving the digging tool receiver between the digging tool receiver and the digging tool mounting position on the rotary chuck device, and a drive device for tilting the guide frame with respect to the support frame. Characteristic side hole drilling equipment.