JPH03194094A - Lateral hole excavating device - Google Patents

Abstract

PURPOSE:To improve excavation efficiency by forming opening parts at an interval of a given angle in the lower part of a vertical casing incorporating a small lateral hole excavating device for a cable pipe and mounting the excavating device such that the direction of the device is variable in a given angle arc at a time. CONSTITUTION:Two or more opening parts 9A and 9B are formed at an interval of 90 deg. in the lower part of a casing 1b inserted in a vertical hole excavated in a road. A lateral hole excavating tool 8 and a rotation drive device 7 are mounted on an elevating frame 2 mounted in the casing 1b. Further, the frame 2 is mounted such that its direction is variable in a 90 deg. arc at a time. Lateral holes different in the direction are excavated without pulling off the casing 1b inserted in the vertical hole. This constitution improves the efficiency of excavation of the lateral hole.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applicable to pipes for storing telephone lines, signal lines, power lines, etc. buried underground, or horizontal holes for constructing gas pipes, water pipes, etc. This invention relates to a horizontal hole drilling device using a threaded drilling tool for digging a relatively small diameter horizontal hole.

(Conventional technology) A horizontal hole drilling device using a conventional screw-type drilling tool is
Insert the casing of the horizontal hole drilling device into the vertical hole, and install guide rails at two 180 degree intervals Th on the inner surface of the casing,
The lifting frame is raised and lowered along the guide rail, and the rotation driving device for the excavating tool provided on the lifting frame L and the traversing device of the rotating driving device operate to perform excavation with the digging tool, and the rotation driving device By opening and closing the rotary chuck device for gripping the tail end provided at the front end of the lifting frame and the fixed chuck device for gripping the tail end of the preceding excavation tool provided at the front end of the lifting frame.
The structure was such that excavation progress was made by adding excavating tools. (Japanese Unexamined Patent Publication No. 17692/1983).

(Problem to be Solved by the Invention) However, in the above conventional horizontal hole drilling equipment, guide rails are provided at 180 degree intervals Th on the inner surface of the casing inserted into the vertical hole, and the lifting frame is raised and lowered along the pair of guide rails. Therefore, once the casing is inserted into the vertical hole, it is not possible to change the direction of the lifting frame to the right angle direction to perform excavation.
As shown in the figure, there is a horizontal hole for the main pipe buried in road a.

When excavating a horizontal hole d for a branch pipe branching from the main pipe into a premises C such as a residence, a vertical hole A is excavated.

Insert the casing (not shown), insert the main body part (elevating frame) of the horizontal hole drilling device into the casing, and excavate the horizontal hole B for the wood pipe (or the horizontal hole D for the branch pipe) to open the main pipe (or branch pipe). After burying, it is necessary to change the orientation of the lifting frame by pulling out the casing, changing the orientation of the casing by 90 degrees, and inserting it into the vertical hole A again.
There was a problem with poor work efficiency.

In view of the above problems, an object of the present invention is to provide a horizontal hole drilling device capable of excavating a horizontal hole in two directions while the casing remains inserted into the vertical hole when the excavation directions are perpendicular to each other.

Means for Solving Problem C8) In order to achieve the above object, the present invention provides a horizontal hole drilling device using a screw-type drilling tool, which is inserted into a vertical hole and has 90 mm A casing with openings for inserting excavators at intervals, four guide rails installed vertically at 90 degrees apart on the inner surface of the casing, and can be moved up and down along the four guide rails. attached to.

and a lifting frame that can be mounted by changing the direction by 90 degrees, a rotational drive device for an excavation tool installed on the lifting frame, a traversing device that moves the rotational drive device forward and backward, and a traverse device that is attached to the rotational drive device. a rotary chuck device that removably grips the rear end of the preceding excavating tool; and a rotary chuck device that is attached to the front part of the lifting frame and that grips the rear end of the preceding digging tool on the axis of the rotary chuck device when adding or detaching the excavating tool. The present invention is characterized by comprising a fixed chuck device for gripping, and a device for raising and lowering the elevating frame.

(Function) Since the present invention has the above-described structure, one of the openings at the lower end of the casing in the vertical hole faces in the direction of one horizontal hole to be excavated, and the other one faces in the direction of excavating the other horizontal hole. Insert the lifting frame, which is the main body of the horizontal hole drilling equipment, into the casing.

Insert the excavator so that the # part (tip side of the excavator) faces one opening, add the excavator, and perform excavation by operating the rotary drive device and traversing device. After recovering the excavator, pull up the elevating frame. The orientation of the lifting frame is changed 90 degrees, and it is placed into the lifting frame casing again along the guide rail, and another horizontal hole is excavated.

(Embodiment) An embodiment of the horizontal hole drilling apparatus of the present invention will be described below with reference to the drawings. Figure 1 is a cross-sectional view showing the horizontal hole drilling equipment (A-A cross-sectional view in Figure 3), Figure 2 is a cross-sectional view showing the state in which the orientation of the lifting frame has been changed from the state in Figure 1, and Figure 3 is a cross-sectional view showing the horizontal hole drilling equipment. The figure is a front sectional view showing the working state of the embodiment, and FIG. 4 is a side sectional view thereof.

In Figure 1, A is a vertical hole excavated to a predetermined depth from the ground, la and lb are casings pushed into the vertical hole A, and one of the appropriate lengths is used depending on the depth of the vertical hole A. Or multiple pieces are combined. Each casing la, lb
, four guide rails 5A to 5D are vertically fixed by welding or the like at locations 90 degrees apart in the circumferential direction. Each of the guide rails 5A to 5D has a right-angled tip in its horizontal cross section, and opposing surfaces of adjacent guide rails are parallel to each other.
Cutout-shaped excavator insertion openings 9A and 9B are provided at the center between the guide rails 5A and 5B and between the guide rails 5B and 5C at the lower end of the lower casing lb, respectively.

Reference numeral 2 denotes an elevating frame consisting of a circular support frame 3 and a guide frame 4 to which q is attached. The support frame 3 has left and right foot portions 3c and 3d, and left and right column portions 3a and 3 each having an L-shaped cross section at the rear thereof.
b are joined together. Bottom part 3c of support frame 3
, 3d in the longitudinal direction (excavation direction) is set slightly smaller than the interval X between the facing surfaces of the guide rails 5A to 5D.

The foot portion 3 is located between any of the guide rails 5A and 5B.
c, 3d can be inserted, and when inserted.

The front ends of the foot portions 3c and 3d and the back surfaces of the pillar portions 3a and 3b are configured to come into sliding contact with opposing surfaces of the guide rails 5A to 5D.

Between the left and right legs Fff13c and 3d of the support frame 3 is a rotation drive device for an excavating tool 8 such as a screw auger! i7
The guide frame 4 on which the foot parts 3c and 3
The guide frame 4 is attached so that its inclination angle can be changed with respect to d.

The guide frame 4 includes a pair of guide rails 10.
．． 10 is fixed in the longitudinal direction, and the rotation drive device 7
It is positioned and movable by the guide rail lO.

The frame of the rotary drive device 7 includes a frame of the rotary drive device 7.
A hydraulic motor 12 for traversing is installed to traverse the
A pinion 13 rotated by the hydraulic motor 12 is meshed with a rack 14 fixed to the guide frame 4.

The rotary drive device M7 has a hydraulic motor 7a for rotating the excavating tool and a rotary chuck device gt'yb, and has a built-in mechanism (not shown) for operating the rotary chuck device fb. The chuck device fi7b is connected to the hydraulic motor a.
The claws for chafing are slidably fitted into a plurality of wide-bottomed grooves formed radially in the rotating body rotated by the excavator 8, and the claws are moved in the radial direction by a hydraulic cylinder (not shown). The grip portion 8a is gripped and released.

A fixed chuck device ts for adding an excavator is attached to the end of the guide frame 4. The fixed chuck device 16 includes a pair of left and right hydraulic cylinders 17 and 18 having tubes attached to the guide frame 4, and a grip at the tail end of the excavator held at the front end of the guide frame 4 so as to be able to approach and separate from each other 1q. Part 8d consists of a gripping pawl 19.20 and a link 21.22 that converts the expansion and contraction of the hydraulic cylinder 17.18 into an opening/closing operation of the gripping pawl 19.2o.

In FIG. 3, 24 is a frame installed in the casing laJ:, and the frame 24 includes a winch 25 for lifting and lowering the lifting frame 2, an operation switch device 26, an operation lever 27 for traverse and rotation, and hydraulic, electric, A control device 2!28 for excavating air (injected from the tip of the excavation tool 8), a reel 2 for winding hydraulic and pneumatic hoses connected to equipment mounted on the lifting frame 2, and electric signal and power cables.
Equipped with 9. Hydraulic power sources, power supplies, and compressors are not shown in the figure, although they may be provided in the work vehicle.

The wire lobes 31 that are wound up and let out on the winding drum of the lifting winch 25 are attached to the upper frame 3e of the support frame 3.
It is hung on a sheave 32 attached to the center of the frame 24, and the end is connected to the frame 24.

40 is an excavation A attachment/detachment device;

As shown in FIG. 3, the excavating tool holder attached to the hydraulic cylinder 56 for lifting and lowering the excavating tool provided on the support frame 3 attaches and detaches the excavating tool between the table 60 and the rotary chuck device fi7b of the rotary drive device 7. The configuration is also shown in the f-plane view in FIG. 5 and the side view in FIG. 6. Excavation tool attachment/detachment device i
40, as shown in FIGS. 1 and 3, a bracket 41 bolted onto the guide frame 4, a hydraulic rotary cylinder 42 mounted on the bracket 41, and a rotating shaft 43 of the rotary cylinder 42. The rotating arm 44 is attached to the rotating arm 44.

As shown in FIGS. 5 and 6, a pair of gripping tools 46 and 47 each having an arcuate cross section are provided at the tip of the rotating arm 44.
is attached so as to be opened and closed by a hydraulic cylinder 50 around pins 48 and 49 at both ends.

Further, as shown in FIG. 6, a stopper 51 is welded to the rotating arm 44, and the stopper 51 comes into contact with the guide frame 4 when the rotating arm 44 rotates from the state shown in FIG. The excavating tool 8 is held by the gripping tools 46 and 47.
The axis of the rotary chuck device 17b is configured to coincide with the axis of the rotary chuck device 17b.

As shown in FIGS. 3 to 5, the excavator lifting device is equipped with a two-stage telescoping hydraulic cylinder 56 to which a support frame 3 is attached, and an excavator holder is mounted on a platform 60 at the tip of the piston rod of the hydraulic cylinder 56. is installed. The excavating tool holder has a semicircular recess f formed in the base 60, into which a male threaded part 8b at the front end of the excavating tool 8 and a female threaded cylinder part (grip part) 8a at the rear end are respectively fitted.

When using this device to excavate a horizontal hole from vertical hole A to site C as shown in Fig. 7, for example, a casing lb.
, la so that the opening 9A faces the site C side 2. In addition, with the lifting frame 2 pulled up into the frame 24, the bit-equipped excavator 8A (
A stopper 57 fixed to the inner surface of the casing lb by gripping the winch 25 (see 4th UA) and rotating the winch 25 in the lowering direction.
lower the support frame 3 until it is locked, operate the traverse hydraulic motor 12 in the forward direction, move the rotary drive device 7 forward until it reaches the front end position of the guide frame 4, and at the same time reduce the hydraulic pressure of the rotary drive device 7. Excavation is performed by rotating the motor 7a in the normal direction.

Thereafter, the one-turn chuck device (7b) is opened to release the bit-equipped excavator A8A, the traverse hydraulic motor 12 is operated in the backward direction, and the rotary drive device 7 is retreated to the rear end position of the guide frame 4.

Next, the hydraulic cylinder 56 is extended to raise the excavating tool holder 60 to the ground position, and the worker on the ground
0, the hydraulic cylinder 56 is contracted, and the excavating tool 8 is placed on the open gripping tool 46 of the excavating tool attaching/detaching device 40.
．． 47.

Next, the hydraulic cylinder 50 is extended and the excavator 8 is gripped by the grippers 46, 47, and then the rotary cylinder 42 is rotated until it comes into contact with the stopper 51 or the upper surface of the guide frame 4, and the two points shown in FIG. As shown by the chain line, the excavating tool 8 is positioned in front of the rotary chuck device 7b with their axes aligned with each other. The grip part 8a is equipped with a rotating chuck! 17b.

Next, the hydraulic cylinder 50 is contracted and the gripping tools 46, 47 are
The excavator 8 is released from its grip, and the cylinder 42 is operated once, and the gripper 46, 47 is rotated to the position of the excavator support stand 60 and retracted.

Next, attach the rear end of the drilling tool 8A with the bit to the fixed chuck mounting J.
By gripping it with illB, moving the rotational drive device M7 forward, and rotating the trailing excavator 8 in the forward direction, the trailing excavator 8A is gripped by the gripping part 8a, which is a female threaded cylindrical part at the rear end of the bit-equipped excavator 8A. The front end male threaded portion 8b of the excavator 8 is screwed in to connect the trailing excavator 8, and then the rotary drive device 7 moves forward and the excavator 8 rotates forward to perform horizontal hole excavation.

By repeating such operations, the vertical hole or groove (not shown) excavated at the end of the horizontal hole excavation is excavated. In addition, in cases where the excavation ground is hard, etc., the preceding excavation tool should be jI! ! The rear end of the leading excavator is gripped by the fixed chunk device i16 so that it is securely held on the board.
Holding is not always necessary.

Note that, depending on the geology, the excavating tools 8A, 8 are made hollow, and excavation is performed while blowing out compressed air or water from the tip of the excavating tools 8A.

Next, the recovery work of the excavating tool 8 will be explained. First, remove the drilling tool 8A with a bit and connect the end of a buried pipe (not shown) to be inserted into the horizontal hole drilled at the front end of the drilling tool 8, or
Alternatively, remove the excavation bit at the tip of the excavation tool 8A with a bin, connect the end of the buried pipe, and move the rotary drive device 7, which grips the rear end of the rearmost excavation J4B with the rotary chuck device 7b, horizontally. The vehicle is moved backward by operating the hydraulic motor 12 in the backward direction.

Next, when the rotary drive device 7 is retreated to a position where the grip portion 8a at the rear end of the preceding excavating tool 8 can be grasped by the fixed chuck device 916, the retraction is stopped, and the rear end of the preceding excavating tool 8 is stopped. The drilling tool 8 held by the fixed chuck device 16 is gripped by the fixed chuck device 16, and the hydraulic motor 7a is reversed to reverse the excavation tool 8 gripped by the rotary chuck device @1b. !
7 is moved backward to separate the excavating tool 8 held by the rotary chuck device 7b from the preceding excavating tool buried underground.

Next, the rotating cylinder 42 is actuated to hold the gripping tools 46, 47.
is placed on the excavating tool 8 held by the rotary chuck device 7b, the hydraulic cylinder 50 is extended, and the excavating tool 8 is held by the gripping tools 46 and 47. Subsequently, the rotary chuck device 17b is opened, the rotary drive device 7 is moved back, and the one-rotation cylinder 42 is activated to remove the gripping tool 46 that grips the excavating tool 8.
, 47 are rotated to the position of the excavating tool holder 60, the hydraulic cylinder 50 is contracted, and the gripping tools 46, 47 are opened.

Next, by extending the hydraulic cylinder 56, the excavating tool 8 is pushed up to the ground together with the excavating tool holder 60, and the worker retrieves the excavating tool 8 on the ground and contracts the hydraulic cylinder 56 again to start digging. The tool holder grips the stand 60 Mc4
6. Lower to position 47.

Next, the rotary drive device 7 is moved around by the operation of the traversing hydraulic motor 12, the rear end of the excavating tool 8 exposed in the vertical hole A is gripped by the rotary chuck device a17b, and the excavating tool 8 is moved by the same operation as described above. Collect.

This operation is continued until the tip of the buried pipe is exposed inside the vertical hole A.

After this, when excavating a horizontal hole along road a shown in No. 71A, leave the casings la and lb inserted in the vertical hole A, and move the lifting frame 2 to the frame 24.
With the frame 24 pulled up inside, the frame 24 is lifted together with the lifting frame 2 using a lifting device installed in the work vehicle 1.
2, insert the legs 13d and 3c of the support frame 3 between the guide frames 5A and 5B and between the guide frames 5C and 5D, respectively, and set the frame 24 on the casing la. Next, the excavating tool 8 is taken in and taken out from the opening 9B, and the same excavation and digging tool recovery work as described above is performed.

By doing this, the casing la.

It is possible to switch between excavation operations in different directions without having to pull out the lb.

In the above embodiment, the openings are provided at two locations, 9A and 9B, but they may be provided at three or four locations with an interval of 90 degrees in the circumferential direction at π. Further, guide rollers attached to the support frame 3 may be engaged with each of the guide rails 5A to 5B.

(Effects of the Invention) According to the present invention, the openings for inserting an excavator provided in the casing are provided at two or more locations spaced apart by 90 degrees in the circumferential direction, and the guide rails provided on the inner surface of the casing are also spaced apart by 90 degrees in the circumferential direction. Since it is installed in four locations, the lifting frame can be set inside the casing by changing its direction by 90 degrees, and it is possible to switch between excavation operations in different directions without having to pull out the casing inserted into the vertical hole. Excavation efficiency can be increased when performing horizontal hole excavation and horizontal hole excavation for the site. Furthermore, by increasing the number of openings, it is also possible to perform excavation in the opposite direction.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view (A-A cross-sectional view in FIG. 3) showing an embodiment of a horizontal hole drilling apparatus according to the present invention, and FIG. 2 is a cross-sectional view showing a state in which the orientation of the elevating frame has been changed. FIG. 3 is a front sectional view of the horizontal hole drilling device of this embodiment, FIG. 4 is a side sectional view thereof, FIG. FIG. 5 is a side view of the excavator attaching/detaching device, and FIG. 7 is a plan view showing horizontal hole excavation on a road and site.

Claims (1)

[Claims] A horizontal hole drilling device that uses a screw-type drilling tool includes a casing that is inserted into a vertical hole and has at least two openings at its lower end separated by 90 degrees for the insertion of the drilling tool, and an inner surface of the casing. 4 guide rails provided vertically at 90 degrees apart, a lifting frame that can be mounted so as to be raised and lowered along the 4 guide rails, and that can be mounted by changing the direction in 90° increments; a rotational drive device for the excavation tool installed on the frame; a traverse device for advancing and retracting the rotational drive device; a rotation chuck device attached to the rotational drive device and detachably gripping the rear end of the excavation tool;
a fixed chuck device that is attached to the front part of the lifting frame and grips the rear end of the preceding digging tool on the axis of the rotary chuck device when adding or removing the digging tool; and a device that lifts and lowers the lifting frame. A horizontal hole drilling device characterized by: