JP3544971B2 - Drilling machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drilling machine suitable for excavating rocks, for example, when drilling a large number of holes in rocks prior to rock crushing by a breaker or the like.
[0002]
[Prior art]
Conventionally, blasting has been mainly used for crushing rock when constructing a shaft for a base of a highway or a railway pier or a base of a steel tower. However, in recent years, such highway construction and the like have often been performed near private houses, and blasting has become increasingly unusable due to vibration and noise. Therefore, a self-propelled work machine having a hydraulic breaker attached to the front is used.
[0003]
But there are volcanoes near ground very fracturing difficult hard rock to like Fuji, in such a rock, simply because the crushing due only breaker is very inefficient, before crushing by Breaker A large number of holes are formed at substantially equal intervals in the ground made of rock to facilitate crushing and improve crushing efficiency. Conventionally, in order to perform such preliminary drilling, a self-propelled working machine in which a drilling device having one drill is attached to the front has been used.
[0004]
Although not used for preliminary drilling in the rock excavation, a drill mounting frame having a plurality of drill motors attached to the front of the working machine is used as a drilling machine used in a rock sampling place or the like which can be used as a worktable relatively easily. A vertical plate is provided at both ends thereof so as to be vertically movable with respect to the drill mounting frame. At the lower ends of the left and right vertical plates, the vertical plate and the drill mounting frame are fitted to the holes drilled in the ground in advance. There is one in which a fixing pin is attached (see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-11-28721 (FIG. 1).
[0006]
[Problems to be solved by the invention]
In the hard rock excavation, when preliminary drilling by a drill is performed by a conventional drill having one drill before drilling by a breaker, there is a problem that drilling cannot be performed efficiently.
[0007]
On the other hand, in the drilling machine described in the above publication, drills are arranged at regular intervals, and therefore, it is not possible to adjust the drilling intervals according to the properties of the rock. For this reason, in the case of rock which is very difficult to crush, the arrangement density of holes is insufficient. On the other hand, in the case of rock which is relatively easy to crush, the arrangement density of holes becomes excessive and extra holes are drilled. There is a problem that a situation occurs and the efficiency becomes poor.
[0008]
Further, when the ground to be excavated is inclined, the drill mounting frame is also inclined, so that the holes to be drilled are also inclined, so that there is a problem that the intervals between the holes are not uniform inside the ground.
[0009]
In addition, since a hole for fixing the drill mounting frame needs to be formed in the ground in advance, there is a problem that it takes time and effort.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to provide a drilling machine capable of efficiently drilling when performing preliminary excavation of rock excavation that is difficult to crush, in order to solve the above-mentioned problems.
[0011]
It is another object of the present invention to provide a drilling machine capable of drilling holes vertically even when drilling a plurality of holes simultaneously on an inclined ground.
[0012]
It is another object of the present invention to provide a drilling machine that can easily fix a drilling device.
[0013]
[Means for Solving the Problems]
The drilling machine of the present invention is a drilling machine for drilling a large number of holes in a bedrock prior to an original crushing operation when excavating the bedrock at the bottom of a shaft.
A revolving structure having a structure in which the rear end does not protrude from the end of the traveling structure via a revolving device on the traveling structure ,
Attach the front to the revolving superstructure,
The front comprises a straight up-and-down boom, and an arm rotatably attached to the up-and-down boom and having the same length as or close to the up-and-down boom,
At the front end of the front, a landing member having a sharp projection that cuts into the ground on the landing surface is attached to the front so as to be capable of adjusting the right and left tilt angles and the front and rear tilt angles,
Providing a horizontal frame protruding left and right on the landing member,
A vertical frame is attached to the left and right sides of the horizontal frame so that the distance can be adjusted,
Attaching the drill mounting frame to each of the vertical frames so that the vertical position can be adjusted freely,
A drill motor is provided for driving the rotation of the drill, which is vertically moved by a vertical drive device along the drill mounting frame.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view of a drilling machine according to the present invention, FIG. 2 is a side view showing a main part thereof, FIG. 3 is a front view showing a main part, and FIG. 4 is a plan view showing a working state of the drilling machine. In FIG. 1, reference numeral 1 denotes a crawler type traveling body, reference numeral 2 denotes a swing device mounted on the traveling body 1, and reference numeral 3 denotes a swivel having a structure in which a rear end does not protrude from an end of the traveling body 1 installed on the swing device. The body 4 is an articulated front attached to the revolving superstructure 3. The multi-joint front 4 includes a boom 5 and an arm 6, and a punching device main body 7 capable of simultaneously drilling two holes is mounted on the front 4.
[0015]
The boom 5 has a substantially linear shape, and is attached to the revolving unit 3 so as to be raised and lowered by a boom raising and lowering hydraulic cylinder 9 around a pin 8. One end of the hydraulic cylinder 9 for raising and lowering the boom is connected to the revolving unit 3 by a pin , and the other end is connected to the boom 5 by a pin . The boom raising / lowering hydraulic cylinder 9 has a length substantially equal to or close to the boom 5, and is set such that the boom 5 is substantially vertical when the cylinder stroke is in the maximum extension state. The hydraulic cylinder 12 for rotating the arm 6 has one end connected to the back of the boom 5 by a pin 13 and the other end connected to the rear end of the arm 6 by a pin 14.
[0016]
Reference numeral 15 denotes a shaft (see FIG. 2) which is attached to the tip of the arm 5 by a pin 16 by a hydraulic cylinder 17 so that the tilt angle can be adjusted in the front-rear direction. A landing member 20 is attached to the shaft 15 by a hydraulic cylinder 19 so that the left and right inclination angles can be adjusted. The landing member 20 has a sharp projection 20a that cuts into the ground serving as the ground and fixes the punching device main body 7 to the ground.
[0017]
As shown in FIG. 3, a horizontal frame 21 is fixedly provided on the landing member 20. The horizontal frame 21 includes a guide rod 21a serving as an upper horizontal member, a guide rail 21b provided as a lower horizontal member, and a vertical member 21c which is fixed to both ends thereof at the top and bottom.
[0018]
As shown in FIG. 2, one left and right vertical frame 22 is attached to the horizontal frame 21 so that the left and right positions can be adjusted. That is, on the back surface of the vertical frame 22, a cylindrical body 22a slidably fitted to the guide rod 21a, a sliding tool 22b slidably engaged with the guide rail 21b, and a sliding tool. And a stopper 22c for fixing the guide rail 22b to the guide rail 21b. The sliding of the vertical frame 22 with respect to the horizontal frame 21 may not be performed manually, but may be performed using a hydraulic cylinder, a motor, or the like as a driving unit. In the present embodiment, the vertical frame 22 is configured such that the interval between the axes of the drills 26 described later can be adjusted at an interval of 60 to 120 cm.
[0019]
Drill mounting frames 23 are respectively mounted on the vertical frame 22 by a pair of guide members 22d provided above and below the vertical frame 22, and rails 23a on both sides of the drill mounting frame 23 are slidably held and mounted. The drill mounting frame 23 moves up and down with respect to the vertical frame 22 by the expansion and contraction of the hydraulic cylinder 24. A landing member 25 is attached to the lower end of each drill attachment frame 23.
[0020]
As shown in FIGS. 2 and 3, a carriage 29 carrying a drill motor 27 is slidably mounted on the drill mounting frame 23. A drill 26 having a drill bit 26 a at the tip is mounted on the drill motor 27.
[0021]
Reference numeral 30 denotes a hydraulic cylinder for moving the carriage 29 up and down. The upper end (cylinder main body) is fixed to the upper end of the drill mounting frame 23, and the lower end (piston rod) is connected to the drill mounting frame 23 via a spring 31. Is connected to a sheave 32 which is mounted to be vertically movable.
[0022]
33 and 34 are wires for moving the carriage 29 up and down by the expansion and contraction of the hydraulic cylinder 30. One end of the wire 33 is connected to a weight 35 mounted on the drill mounting frame 23 so as to be vertically movable, an intermediate portion is hung on a sheave 36 mounted on the upper portion of the drill mounting frame 23, and the other end is connected to the carriage 29. Connected. One end of the other wire 34 is connected to the drill mounting frame 23 by a connector 37, an intermediate portion is hung on the sheave 32, and the other end is connected to the carriage 29.
[0023]
Accordingly, when the hydraulic cylinder 30 is extended, the sheave 32 descends, whereby the carriage 29 is pulled downward by the wire 34, and the drill 26 descends together with the drill motor 27. Done. At this time, the weight 35 goes up. Conversely, when the hydraulic cylinder 30 is contracted, the weight of the weight 35 raises the carriage 29 and raises the drill 26. In the present embodiment, the drill 26 driven by the drill motor 27 has a length of 1.7 m and a vertical stroke of 1.2 m. Note that, instead of the weight 35, a drum to which a rotational force is applied by a torque motor or a spring may be used.
[0024]
As shown in FIG. 4, this drilling machine, when constructing a shaft for a highway, a railroad pier base, a steel tower base, or the like, has a number of holes 39 formed in a shaft 38 in advance before excavation by a breaker. It is suitably used when drilling to a depth. For the perforation, the crane is lowered to the bottom of a shaft 38 having a diameter of, for example, 10 m by a crane.
[0025]
In this case, as shown in FIG. 1, the traveling, turning, and turning of the drilling machine are performed so that the drill 26 is positioned above the place where the hole 39 is to be drilled, and the landing member integrated with the horizontal frame 21 is positioned. The hydraulic cylinders 9, 12 and 17 are operated so that the projection 20a at the tip of the landing member 20 bites into the ground to land and fix, and the hydraulic cylinders 17 and 19 are operated so that the drill 26 is vertical.
[0026]
In this case, as shown in FIG. 5, even when the landing surface 40 of the traveling body 1 of the drilling machine is inclined from the horizontal plane L, the landing members 20 are made vertical by operating the hydraulic cylinders 17 and 19, 22, the drill mounting frame 23 and the drill 26 can be in a vertical position. In addition, even when the ground to be drilled has an inclination, the landing members 25 are each landed by the hydraulic cylinders 24 that move the drill mounting frame 23 up and down in accordance with the height difference, so that the drill mounting frames 23 are vertically moved. It can be landed in the state where it was done.
[0027]
In this state, the drill 26 is lowered together with the drill motor 27 by the extension of the hydraulic cylinder 30, and the drill motor 27 is driven to rotate the drill 26 to drill a hole 39 in the rock. In this case, in the case of a super-hard basalt requiring a crushing force of 294 MPa (σc = 3 t / cm ² ) or more, the diameter of the hole to be bored (the diameter of the drill bit 26 a) is 4.6 cm, and the interval between the holes 39 is 30 cm. And In the present embodiment, since the minimum interval between the two drills 26 is 60 cm, the interval between the drills is set to 60 cm, and is shifted laterally by 30 cm to obtain an interval of 30 cm.
[0028]
After drilling two holes 39 at a time by such an operation, the position of the drill 26 is changed by traveling, turning of the revolving unit 3 and operation of the front 4 to drill holes 39 in another place. After drilling holes 39 on the entire surface of the ground, the drilling machine is lifted above the ground by a crane, and a crusher having a hydraulic breaker is lowered to the excavated ground for excavation. In this case, since the holes 39 are formed in advance, crushing with a drill becomes easy. Gravel and the like generated by excavation are lifted to the ground by a crane and accumulated. Then, the operations of piercing with a piercing machine, digging with a drill, and lifting and removing the gravel with a crane are repeated until a predetermined depth is reached.
[0029]
As described above, if the drilling machine according to the present invention is used, two holes 39 can be drilled at a time, so that the efficiency is twice as high as that of the conventional drilling machine, and the tightness when two drilling machines are inserted into the shaft 37 is reduced. And can be perforated with good workability. Also, if one drilling machine is inserted, it works for two drilling machines, so that the movement of the drilling machine is relatively free, the workability is improved as compared with the case where two drilling machines are inserted, and a crane is used. The number of times the drilling machine needs to be moved in and out of the shaft can be reduced, which contributes to improvement of work efficiency.
[0030]
Further, since the two drill mounting frames 23 are provided so as to be adjustable in the left-right space, a suitable hole space can be set according to the properties (strength) of the rock at the site. For rocks that are difficult to crush, the gap between holes is increased to facilitate crushing, while for rocks that are relatively easy to crush, extra holes are drilled by increasing the gap between holes. Can be prevented, and in any case, excavation work efficiency can be improved.
[0031]
Further, in the present embodiment, the horizontal frame 21 is configured so that the inclination angle in the left, right, front and rear directions can be adjusted. Therefore, even if the ground on which the drill mounting frame 23 lands is inclined, the horizontal frame 21 can be horizontal. And vertical drilling is possible. In the periphery of a certain shaft 37, when the ground to be drilled is inclined, it is possible to drill a hole vertically in the ground or to drill a hole inclined in the horizontal ground. .
[0032]
Further, since the drill mounting frame 23 is vertically movably mounted on the vertical frame 22, when the lower end of the drill mounting frame 23 lands on the ground and the drilling is performed by the drill 26, both of the two are set according to the inclination of the ground. The drill mounting frame 23 can be landed with a height difference so that the drill mounting frame 23 is vertical, and a hole can be drilled vertically regardless of the ground shape.
[0033]
In addition, since the landing member 20 is integrally provided with the horizontal frame 21 and the sharp projection 20a is formed on the ground surface of the landing member 20 so as to cut into the ground, the swinging can be performed without providing a fixing hole in the excavated ground. The frame 21 and, consequently, the drill mounting frame 23 can be fixed easily and quickly, thereby increasing the efficiency.
[0034]
In addition, the rear end of the revolving unit 3 does not protrude from the end of the traveling unit 1, and the front 4 is mounted on a straight up-and-down boom 5 and rotatably attached to the up-and-down boom 5, Since the boom 5 and the arm 6 having the same or similar length are used, a drill having a small working radius and a large output can be formed in the space inside the narrow shaft 37, which contributes to an improvement in efficiency.
[0035]
Further, the working radius at the distal end position of the arm 6 is smaller than that of the conventional hydraulic excavator, so that the distal end of the arm 6 can be brought close to the vicinity of the traveling body 1 and the tipping moment on the front side can be further reduced. Since the overturning moment can be reduced, a large-sized punch having a larger output than the standard one can be mounted on the front 4 and the boom 5 is designed to withstand the operation when the large-sized punch is mounted. The weight of a counterweight (not shown) provided at the rear portion of the revolving unit 3 may be increased in order to increase the strength of the front such as increasing the thickness of the plate constituting the arm 6 and to further secure the stability of the vehicle body. desirable. In addition, it is preferable to set the left and right crawler belt intervals so as to be within the width of the revolving unit 3 and to set the length in the longitudinal direction so as to be within the turning radius at the rear end of the revolving unit 3.
[0036]
As a device for moving the drill mounting frame 23 up and down, a rack is meshed with a gear driven by a hydraulic motor, and a drill motor 27 is mounted on the rack, or a chain is driven by the motor, and a drill is mounted on the chain. A motor having a fixed motor 27, a motor having a drill motor mounted on a carriage having a screw hole engaged with the screw rod by rotating a screw rod by a winch-wire rope method or a motor, or the like can be used.
[0037]
【The invention's effect】
As described above, according to the drilling machine of the present invention, two holes can be drilled simultaneously by one drilling machine, so that the efficiency is improved. In particular, when excavating a shaft, if one drilling machine is inserted, it works for two machines. Therefore, the movement of the drilling machine becomes relatively free, and the workability is improved. The number of times of putting in and out can be reduced, which contributes to improvement of work efficiency.
[0038]
In addition, since the two drill mounting frames are provided so as to be adjustable in the lateral direction, a suitable hole interval can be set according to the properties (hardness) of the rock at the site. Therefore, in the case of hard rock which is difficult to crush, the interval between holes is reduced to facilitate crushing, while in the case of rock which is relatively easy to crush, the interval between holes is increased to increase the excess hole. It is possible to prevent occurrence of a situation in which a hole is drilled, and in any case, it is possible to improve the excavation work efficiency.
[0039]
In addition, the rear end of the revolving structure does not protrude from the end of the traveling structure, and the front is rotatably attached to the linear up-and-down boom and the up-and-down boom, and is the same or close to the up-and-down boom. Since the arm is constituted by the long arm, a drill having a small working radius and a large output can be constituted in a space in a narrow shaft, which contributes to an improvement in efficiency.
[0040]
In addition, a landing member to which the horizontal frame is fixed is provided, and the landing member has a sharp projection that cuts into the ground on the ground, so that the drilling device is easily and quickly fixed to the ground without providing a hole in the ground. be able to.
[0041]
In addition, since the horizontal frame is provided so that the inclination angles in the left, right, front and rear directions can be adjusted, the horizontal frame can be kept horizontal even when the ground on which the boring machine body lands is inclined. Conversely, when the ground to be drilled is inclined, it is possible to drill holes vertically in the ground or to drill holes inclined in the horizontal ground.
[0042]
In addition, since the drill mounting frame is vertically movable with respect to the vertical frame, when drilling by drilling with the lower end of the drill mounting frame on the ground, depending on the inclination of the ground, both drill mounting frames Can be landed with a height difference on the drill mounting frame so that the hole is vertical, and holes can be drilled vertically regardless of the ground shape.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a drilling machine according to the present invention.
FIG. 2 is a side view of a main part of the drilling machine of FIG. 1;
FIG. 3 is a front view of a main part of the drilling machine of FIG. 1;
FIG. 4 is a plan view showing a state in which a hole is drilled in a shaft using the drilling machine of the present embodiment.
FIG. 5 is a front view illustrating the operation of the present embodiment.
[Explanation of symbols]
1: running body, 2: swinging device, 3: swinging body, 4: articulated front, 5: boom, 6: arm, 7: drilling device main body, 9: hydraulic cylinder for raising and lowering the boom, 11, 13, 14: Pin, 12: hydraulic cylinder for arm rotation, 15: shaft, 16: pin, 17, 19: hydraulic cylinder, 20: landing member, 20a: projection, 21: horizontal frame, 21a: guide rod, 21b: guide rail, 22 : Vertical frame, 22a: cylindrical body, 22b: slide, 22c: stopper, 22d: guide member, 23: drill mounting frame, 23a: rail, 24: hydraulic cylinder, 25: landing member, 26: drill, 26a: Drill bit, 27: drill motor, 29: carriage, 30: hydraulic cylinder, 31: spring, 32: sheave, 33, 34: wire, 35: weight, 36: sheave 37: connector, 38: vertical shaft, 39: hole, 40: landing surface, L: horizontal plane

Claims (1)

When drilling rock at the bottom of a shaft, it is a drilling machine that drills a number of holes in the rock prior to the original crushing work,
A revolving structure having a structure in which the rear end does not protrude from the end of the traveling structure via a revolving device on the traveling structure ,
Attach the front to the revolving superstructure,
The front comprises a straight up-and-down boom, and an arm rotatably attached to the up-and-down boom and having the same length as or close to the up-and-down boom,
At the front end of the front, a landing member having a sharp projection that cuts into the ground on the landing surface is attached to the front so as to be capable of adjusting the right and left tilt angles and the front and rear tilt angles,
Providing a horizontal frame protruding left and right on the landing member,
A vertical frame is attached to the left and right sides of the horizontal frame so that the distance can be adjusted,
Attaching the drill mounting frame to each of the vertical frames so that the vertical position can be adjusted freely,
A drilling machine, further comprising a drill motor for driving a rotary rotation of the drill, which is vertically moved by a vertical driving device along the drill mounting frame.

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