JPH0135155B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to the construction of fluid pipes such as gas pipes and water pipes buried underground, or pipes accommodating power lines, light and electric signal lines, etc. This invention relates to a horizontal hole drilling device that excavates a relatively small diameter side hole, such as a side hole for draining water or a side hole for discharging water.

(Prior Art) As shown in Fig. 15, when performing construction work to connect a new pipe 2 for supplying gas to a residence, etc. to an existing gas pipe 1 buried along a road, etc.,
First, the location where the existing pipe 1 is buried is detected using a trial excavator and a metal detector, and the length from the road surface (3 is the surface layer made of asphalt pavement, etc., and 4 is the crushed stone layer) to the location where the existing pipe 1 is buried is 1 m. A worker excavates a vertical hole 5 of about 100 degrees, excavates a horizontal groove 6 from the vertical hole 5 to a residential site, etc., and a worker enters the vertical hole 5 and connects the new pipe 2 to the existing pipe 1 via the elbow pipe 7 and the joint 8, etc. After completing the connection work, the vertical hole 5 and the horizontal groove 6 are filled with sand, and temporary restoration is carried out using asphalt paving etc. to avoid any hindrance to traffic. After a few days, road maintenance is carried out. Currently, main restoration works such as paving work to ensure long-term use are being carried out under the direction of the staff in charge.

According to this prior art, since the road excavation area for the vertical holes 5 and horizontal grooves 6 is wide, there is a problem that excavation, earth filling work, and paving work take time, labor, and construction cost. In addition, because the road excavation area is wide, in order to ensure road traffic and road maintenance, we have no choice but to carry out the restoration work twice: provisional restoration work and main restoration work as mentioned above. Furthermore, there is a problem that it requires labor, construction cost, and construction period. Specifically, the civil engineering work cost for the new pipe facility accounts for 80% of the total cost, and the construction period from the start of work to the completion of the main restoration is 7.
It takes ~10 days.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention can reduce the labor, construction cost, and construction period required for burying pipes, and can eliminate the possibility of excavation being impossible due to other underground objects. It is an object of the present invention to provide a horizontal hole drilling device configured to avoid such a situation.

(Means for Solving the Problems) A horizontal hole drilling device of the present invention has an elevating frame installed in a casing that is fitted into a vertical hole excavated from the ground surface, and the elevating frame has a guide provided in the casing. It consists of a support frame that moves up and down guided by a means, and a guide frame on which a chuck device for an excavation tool, a rotational drive device for the excavation tool, and a traverse device for the rotational drive device are mounted, and the guide frame is connected to the support frame. In contrast, the present invention is characterized in that the rotary drive device is mounted so that the inclination angle can be adjusted so that the inclination of the travel path of the rotary drive device can be changed.

(Example) The details of the present invention will be explained below with reference to Examples. FIGS. 2 and 3 show an example of a working vehicle for raising and lowering a horizontal hole drilling device according to the present invention, and a rotating body 12 is installed on a traveling vehicle 9 having an outrigger 10 via a rotating wheel 11. On the revolving body 12 is a support frame 1 having a horizontal cylindrical body 14 at its tip.
5 is attached, and a horizontal arm 16 is slidably fitted into the cylindrical body 14.
is a bracket 19 fixed to its tip and a cylinder 1
A hydraulic cylinder 1 has a piston rod and a tube connected to each other by pins 23 and 24, respectively.
7, it is configured to be slid in the direction of arrow 18.

A cylindrical body 22 having a rectangular cross section is attached to the upper end of the bracket 19 so as to be tiltable about a pin 20 as shown by an arrow 21 so that it can take at least a posture from perpendicular to the ground to parallel to the ground; The inclination of the cylindrical body 22 can be set by a hydraulic cylinder 27 attached to the lower end of the cylindrical body 22 and the bracket 19 with both ends connected by pins 25 and 26. An outer cylinder 28 having a rectangular cross section is fitted into the cylinder 22 so as to be slid by a hydraulic cylinder 31 attached to the outer cylinder 28 and the cylinder 22 by pins 29 and 30, respectively. 28 includes an inner cylinder 32 having a rectangular cross section.
2 and the upper end of the outer cylinder 28, respectively, a pin 33,
It is inserted so as to be expanded and contracted by a hydraulic cylinder 35 which is attached with both ends connected by 34. A mounting flange 36 is provided at the lower end of the inner cylinder 32 for mounting any working tool, and the mounting flange 36 can be used not only for a horizontal hole drilling device 57 but also for a hole saw or a vertical hole drilling device for drilling the surface layer 3, etc. A bucket for excavation (none of which is shown) can be attached.

Before using the horizontal hole drilling device 57 in this embodiment, the following operations are performed. A hole saw (not shown) is attached to the mounting flange 36 at the lower end of the inner cylinder 32, and the surface layer 3 is cut into a circular shape with a diameter of, for example, about 50 cm, and the crushed stone layer 4 is excavated. Note that the area to be cut is detected in advance by the trial excavator and metal detector, and
The operator in 3 operates the hydraulic cylinders 17, 2.
7, 31, and 35, the position of the hole saw is adjusted to the road surface above the existing pipe 1. In this case, by adjusting the angle of the inner cylinder 32 by operating the hydraulic cylinder 27, even if the road is sloped, the entire surface of the cutter of the hole saw can be in contact with the road surface for cutting. .

A circular casing 46 was pushed into the cut hole, a bucket (not shown) having an opening/closing hydraulic cylinder was attached to the mounting flange 36 of the inner cylinder 32, and the earth and sand inside the casing 46 was excavated and placed near the excavated location. Store the excavated earth and sand in a box (not shown). After excavating to a certain extent, the casing 46 is covered with a lid (not shown) and the hydraulic cylinder 31 is extended to push the casing 46 through the bucket, and the casing 47 to be added is placed on the existing casing 46. Fourth
As shown in the drawings and FIG. 5, the bolts 52 are inserted into the connectors 51 fixed to the upper casing 47 and are screwed into the bolt holes 38 of the lower casing 46 to connect them. In addition, the casing 46,
On the inner wall of the casing 47, two guide rails 53 for guiding the horizontal hole drilling device 57 are vertically provided at opposing positions. A boss is provided and a hole provided on the lower side of the upper side is configured to fit into the boss, but illustration thereof is omitted.

After the vertical hole 54 is excavated to the depth where the existing pipe 1 appears, the existing pipe 1 is dug a little using a manual digging machine so as not to damage the existing pipe 1 and to expose at least the upper surface of the existing pipe 1.

In the example shown in FIGS. 4 and 5, the vertical hole 54 is formed by burying two casings 46 and 47, but one or three casings may be formed depending on the depth of the vertical hole 54. In some cases, the above casings may be added. In actual manufacturing, casings of equal length may be manufactured, but casings of various lengths may be prepared, and by combining the casings, the overall length may be found to be just right. By fitting the casings into the vertical holes 54, casings of just the right length can be fitted with a small number of casings.

After fitting the casings 46 and 47, the fifth
As shown in the figure, the casings 46 and 47 are fixed by means such as driving a wedge 56 between the uppermost casing 47 and the ground surface.

Next, an example of the horizontal hole drilling device 57 will be explained with reference to FIGS. 1 and 6 to 10. Figures 1 and 6
As shown in FIGS. 7 and 7, the lifting frame 58 of the horizontal hole drilling device 57 includes a support frame 59 having a substantially gate shape, and a guide frame 6 attached to the support frame 59.
3, and the support frame 59 includes a universal joint 6.
A guide roller 61 is attached to the support frame 59 so as to be suspended from the inner cylinder 32 through the support frame 59 and roll along the pair of guide rails 53 in the vertical direction of the support frame 59.

The guide frame 63 is connected to the support frame 59
It is installed as follows. A mounting piece 63b is provided on one side of the guide frame 63, and a mounting pin 104 having one end fixed to the mounting piece 63b is attached to one vertical frame 5 of the support frame 59.
9a, and as shown in FIG. 13, an adjustment plate 106 having an arcuate groove 105 is fixed to the other end of the mounting pin 104, and is inserted into the arcuate groove 105 and attached to the vertical frame 59a. By loosening the fixing bolt 107 screwed into the screw hole of the fixed receiving plate (not shown), the guide frame 63 can be swung around the pin 104, and the fixing bolt 107
By tightening the guide frame 63, the guide frame 63 can be fixed to the support frame 59. The range of adjustment of this inclination angle may be such that the tip of the excavating tool 82 is raised about 15 to 20 degrees from the horizontal position of the guide frame 63, that is, the digging tool 82.

The guide frame 63 also has an opening 46a for inserting an excavator, which is a vertically long notch provided in the lower part of the casing 46 in a direction perpendicular to the opposing direction of the guide rails 53, 53. Guide rails 65, 6 forming a pair toward
5 is fixedly installed, and the grooves provided on the outer periphery of guide rollers 66 attached to the four corners of the lower surface of the rotary drive device 62 of the excavation tool 82 are fitted into the guide rail 65, so that the rotary drive device 62 can be attached to the guide rail. 65 and is movable.

A part of the guide frame 63 extends, and a traverse hydraulic motor 67 for advancing and retracting the rotary drive device 62 is installed in the extending portion 63a, and a sprocket 68 is rotated by the hydraulic motor 67.
Then, a chain 71 hooked on sprockets 69 and 70 attached to both ends of the extending portion 63a is connected to a connecting portion 72 provided on the side of the rotary drive device 62,
By operating the hydraulic motor 67, the rotary drive device 62 moves forward and backward along the guide rail 65.

As shown in FIG. 8, the rotary drive device 62 has a hydraulic motor 74 for rotating an excavator fixed to the upper part of a main body 73 with bolts 78, and a bearing 7 on the main body 73.
A rotating body 79 is rotatably attached via a bevel gear 76 attached to an output shaft 75 of the hydraulic motor 74.
and a bevel gear 81 attached to the rotary body 79 by bolts 80, and the rotary body 79 has a rotary chuck that grips a connecting part 82a of a digging tool (82A is a leading digging tool, 82B is a connecting digging tool). device 8
3 is installed. The rotary chuck device 83 is
By forming sliding parts 83a on the plurality of gripping tools 83A to be slidably fitted into the wide-bottomed grooves 79a formed radially in the rotating body 79, it is possible to perpendicular direction)
It is movably installed.

The tightening/loosening device of the rotary chuck device 83 includes a cylinder 87 that is integrated with the rotating body 79 and supplies and discharges hydraulic oil through inlet and outlet holes 88 and 89;
The rod 91 is connected to the piston 90 of the cylinder 87 and movably penetrates the cylindrical portion 79b of the rotating body 79, and a conical fastener 92 is attached to the tip of the rod 91. The fitting 92 includes a fitting hole 92a of the connecting portion 82a of the excavating tools 82A, 82B, and an enlarged bottom groove 92 provided along the inclined direction on the inclined surface of the outer periphery corresponding to each of the gripping tools 83A.
b, and each gripping tool 83A is provided with a sliding portion 83b that is slidably fitted into the groove 92b, and when hydraulic oil is supplied to the rod chamber of the cylinder 87 from the inlet/outlet hole 88, the piston 90, the rod 91 and fastener 9
2 moves as shown by the arrow 85, and the expanded groove 92b
When the gripping tool 83A contracts in the direction of the arrow 84 due to the engagement with the sliding portion 83b, the digging tools 82A, 82 held in the fitting hole 92a of the fastening tool 92 are removed.
The connecting portion 82a of B is configured to be tightened and fixed, and when the hydraulic motor 74 is operated in this state,
The rotating body 79 includes a cylinder 87 and a rotary chuck device 8.
3, so that the excavating tool 82 can be rotated in the excavation direction. Moreover, if hydraulic oil is supplied to the bottom chamber of the cylinder 87 from the inlet/outlet hole 89, the drilling tool 82 will move in the opposite direction to that described above.
A and 82B can be removed.

111 is a gear fitted to the output shaft 75 of the motor 74, 112 is a gear that meshes with the gear 111, and the shaft 113 has a flexible shaft 11 rotated by a handle on the ground (not shown).
4 can be removably connected to the excavating tool 82 via the flexible shaft 114.
By rotating the excavator 82, it is possible to excavate while manually sensing the resistance applied to the excavator 82 and determining whether or not there is an obstacle.

A fixed chuck device 93 for adding an excavator is attached to the end of the guide frame 63. As shown in FIGS. 9 and 10, the fixed chuck device 93 includes a gate-shaped frame 94 fixed on the guide frame 63, and the frame 9.
A movable frame 97 is mounted so as to be movable up and down by a hydraulic cylinder 96 attached to the upper part of the frame 94 along guides 95, 95 provided inside the frame 94, and pins 98, 98 are attached to the left and right of the lower end of the movable frame 97. It consists of claws 100, 100 for gripping an excavating tool, which are attached to be rotatable about the center and opened and closed by a hydraulic cylinder 99 attached to a movable frame 97.

When excavating a side hole using this side hole excavation device 57, the hydraulic cylinders 31, 35 shown in FIG.
In the state in which the inner cylinder 32 is pulled up by contracting the
The device 57 is installed in the inner cylinder 32 instead of the bucket.
, the rotary drive device 62 is placed in the retracted position, and the hydraulic cylinder 87 shown in FIG. The connection part 82a at the tail end of the leading drilling tool 82A, which is formed into a sharp point, is fitted into the fitting hole 92a of the fastener 92, and the piston 90 is gripped by supplying hydraulic oil from the inlet/outlet hole 88 and moving the piston 90 in the direction of the arrow 85. Arrow 84 indicates tool 83A.
direction, grip the leading drilling tool 82A, and adjust the swing angle of the revolving body 12, the protrusion width of the horizontal arm 16, and the outer cylinder 2 so that the guide roller 61 of the horizontal hole drilling device 57 matches the guide rail 53 of the casing 47.
8 and the inclination of the inner cylinder 32, the hydraulic cylinder 31 is extended, and the guide roller 61 of the device 57 is adjusted.
By fitting the device 57 into the guide rail 53 and further extending the hydraulic cylinders 31 and 35, the device 57
The lower end of the frame 59 comes into contact with the stopper 86 at the lower end of the inner wall of the casing 46 and is lowered until it stops, and the fixed chuck device 93 is pulled up so as not to interfere with the forward and backward movement of the excavating tool 82A, as shown in FIG. Then, the traverse hydraulic motor 67 of the rotation drive device 62 is operated in the forward direction, and the excavator rotation hydraulic motor 74 is operated. As a result, the excavating tool 82A passes through the excavating tool insertion opening 46a (see FIGS. 1 and 4) provided at the lower end of the casing 46, enters the ground, and excavates. In this case, the excavation reaction force is generated by the guide frame 63, support frame 59, guide roller 61, guide rail 5
3 to the casing 46, 47 or the vertical hole 5
Receive it on the inner wall of 4.

After moving the rotary drive device 62 forward to the frontmost end (this should be confirmed visually or with a detection switch), by supplying hydraulic oil from the inlet/outlet hole 89 shown in FIG. 8, The grip of the connecting portion 82a by the rotary chuck device 83 is released, and then the traverse hydraulic motor 67 of the rotary drive device 62 is operated in the backward direction to the terminal end. The earth and sand accumulated at the bottom of the vertical hole 54 due to the digging operation is sucked up by a suction machine (not shown) having a suction hose and discharged to the ground.

Then, the hydraulic cylinders 31 and 35 were contracted to raise the horizontal hole drilling device 57 above the ground, and the additional drilling tool 82B was set by gripping the connecting portion 82a at the tail end with the rotary chuck device 83 in the same manner as described above. After that, the hydraulic cylinders 31, 3
5 and lower the device 57 in the same manner as above,
The hydraulic cylinder 96 of the fixed chuck device 93 is extended, the hydraulic cylinder 99 is contracted, and the connecting portion 82a at the tail end of the leading excavating tool 82A is gripped by the claws 100. Then, by operating the traversing hydraulic motor 67 of the rotational drive device 62 in the forward direction and operating the excavating tool rotation hydraulic motor 74, a male threaded connection portion 82b at the tip of the supplementary excavating tool 82B (Fig. (See) Top drilling tool 82
Connect by screwing into the female threaded connection part 82a at the tail end of A. Thereafter, the hydraulic cylinder 99 of the fixed chuck device 93 is extended to disconnect the connecting portion 82a of the leading excavating tool 82A, and then the hydraulic cylinder 96 is contracted and retracted, and the traversing hydraulic motor 67
Then, by operating the excavator rotating hydraulic motor 74, the excavator excavates. By repeating these operations, a horizontal hole of desired length is dug.

After completing the digging operation in this manner, the hydraulic motor 67 for traversing is operated in the backward direction to the end while the hydraulic motor 74 for rotating the excavator is operated in the same rotational direction as during excavation. A connecting portion 82a at the tail end of the drilling tool 82B partially exposed in the vertical hole 54
is fixed by the fixed chuck device 93 and gripped by the rotary chuck device 83.
2B is rotated by operating the hydraulic motor 74 for rotating the excavating tool in a rotation direction opposite to the rotation direction during excavation, and the excavating tool 82B held by the rotary chuck device 83 and the excavating tool 82B held by the fixed chuck device 93 are rotated. The excavator 82B (or 82A) is separated from the excavator 82B (or 82A). Then, after unfixing the horizontal hole side drilling tool by the fixing chuck device 93, the hydraulic cylinder 3
1 and 35 to pull up the horizontal hole drilling device 57, the drilling tool 82B held by the rotary chuck device 83 is removed by the above operation, and the horizontal hole drilling device 57 is lowered again to raise the rotary chuck device 83.
Grip the connecting part 82a of the excavating tool 82B (or 82A) that is partially exposed in the vertical hole 54 and pull it out in the same manner as above. It is separated from the connected drilling tool 82B (or 82A) and lifted to the ground. By repeating these actions,
Complete lifting of excavation tools.

When pulling out such excavation tools 82A and 82B, as shown in FIG. By fitting and fixing the new pipe 2 to the tip of the tool 82A, the excavating tool 8
Side hole 1 was dug at the same time as 2A and 82B were pulled out.
01, the newly installed pipe 2 can be inserted through it.
After the insertion, the work of connecting the new pipe 2 to the existing pipe 1 is performed. Although this connection work is performed using a tool operated on the ground, a detailed description thereof will be omitted since it departs from the gist of the present invention.

After connecting the newly installed pipe 2, sand is poured into the casings 46 and 47 to the extent that they are partially buried, and the sand is compacted using a manual rammer or the like. The casings 46 and 47 are lifted up using a turret (see figure), and then compacted again to fill them up to the ground surface with sand, and the casings 46 and 47 are completely pulled out, followed by the laying of crushed stone. The surface layer will be paved with asphalt, etc., and the main restoration will be completed.

In this horizontal hole excavation device, the guide frame 63 can be tilted with respect to the support frame 59, so if the guide frame 63 is tilted as shown in FIGS. 12 and 13, as shown in FIG. 14. As shown in FIG. 11, it is possible to provide an inclined horizontal hole 108 with the side of the site to be supplied such as residential land rising, and the hole 109 provided on the side of the site to be supplied is the same as the horizontal hole 101 shown in FIG. It can be made shallower and smaller than 102, and the amount of excavated earth and sand can be reduced. Further, if there is any obstacle 110 on the route to be excavated, the side hole 108 can be dug while avoiding the obstacle 110.

The present invention has been described above with reference to examples, but when carrying out the present invention, the vertical hole 54 and the casings 46, 47 to be excavated from the ground surface to the existing pipe do not necessarily have to be circular, but may be square, rectangular, or other quadrilateral shapes. Alternatively, it may be another polygon. If the cross-sectional area of the vertical hole 54 is increased, the amount of earth and sand to be excavated will increase in proportion to the cross-sectional area, and the degree of damage to the road will increase. , 82B has the advantage that the length that can be excavated becomes longer. Considering these points and the condition that the size of the vertical hole is such that temporary restoration is not required, for a circular vertical hole, 70
cm or less in diameter, preferably 40 cm or more (more preferably 45 to 60 cm, which is a size that prevents a person from bending over to work in the vertical hole), and the vertical hole should be large Even when the cross-sectional shape is rectangular, the dimensions of the vertical hole in the front, rear, left, and right directions are the same as in the case of a circular shape, but the dimensions in the direction of advance and retreat of the excavator are, for example, as described above.
By adopting a shape in which the dimension in the direction perpendicular to the direction of advance and retreat of the excavator is smaller than 40 cm, the advance and retreat distance of the excavator can be increased, and the cross-sectional area of the vertical hole can be increased. It is also possible to make it smaller.

Moreover, the device for raising and lowering the support frame 59 is
Another power device such as a hoisting winch installed on the ground or on the casing 47, or the casing 4
A pinion provided in the horizontal hole excavation device 57 may be engaged with the racks provided at the holes 6 and 47, and the pinion may be rotated to move up and down in a self-propelled manner.

In addition, although the above explanation has focused on the case of drilling a horizontal hole for constructing a new pipe into an existing pipe, when constructing a new pipe, it is also necessary to excavate a horizontal hole through which the pipe will not be inserted. The apparatus of the present invention can also be used in these cases.

(Effects of the Invention) According to the present invention, the vertical hole excavated from the ground surface can have a smaller cross-sectional area.
In addition to significantly reducing the amount of earth and sand excavated in vertical holes, there is no need to excavate and fill conventional horizontal trenches, resulting in significant reductions in labor, construction costs, and construction period. Furthermore, traffic restrictions can be alleviated. In addition, since the guide frame on which the rotational drive device of the excavation tool, etc. is mounted is attached to the support frame so that the inclination angle can be adjusted, the horizontal hole can be provided in a suitable direction. Excavation of a hole for inserting a new pipe to be provided can be done on a small scale, and even if there is an obstacle to excavation underground, the obstruction can be avoided and the horizontal hole can be excavated.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a horizontal hole drilling device according to the present invention, FIG. 2 is a plan view showing an example of a working vehicle for raising and lowering the horizontal hole drilling device according to the present invention, and FIG. 3 is a side view thereof. Fig. 4 is a sectional view showing an example of the vertical hole after burying the casing in this embodiment;
The figure is a sectional view taken along line A-A in Figure 4, and Figure 6 is B in Figure 1.
-B sectional view, FIG. 7 is a C-C sectional view in FIG. 6, FIG. 8 is a side sectional view showing the rotary drive device of this embodiment, and FIGS. 11 is a cross-sectional view showing the hole to be drilled by the device of this embodiment, and FIG. 12 shows the state of use in this embodiment. FIG. 13 is a side view of the embodiment, and FIG. 14 is a longitudinal sectional view.
The figure is a cross-sectional view showing an inclined horizontal hole excavated by the apparatus of this embodiment, and FIG. 15 is a perspective view showing a horizontal hole for burying a new pipe excavated by the conventional technique. 1...Existing pipe, 2...New pipe, 46,47...
Casing, 53...Guide rail, 54...Vertical hole, 57...Horizontal hole drilling device, 59...Support frame, 61...Guide roller, 62...Rotation drive device, 63...Guide frame, 67...For traversing Hydraulic motor, 82...Drilling tool, 83...Rotary chuck device, 93...Fixed chuck device, 101,1
08...Side hole, 104...Mounting pin, 106...
...Adjustment plate, 107...Fixing bolt.

Claims (1)

[Claims] 1. It has an elevating frame installed in a casing that is fitted into a vertical hole excavated from the ground surface, and the elevating frame is guided by a guide means provided in the casing to move up and down, a support frame, a chuck device for the excavating tool, It consists of a rotational drive device for an excavation tool and a guide frame on which a traverse device for the rotational drive device is mounted, and the guide frame is configured such that the inclination of the running path of the rotational drive device can be changed with respect to the support frame. A horizontal hole drilling device characterized by being installed with an adjustable inclination angle.