JP2020105701A - Drilling device - Google Patents

Abstract

To provide a drilling device with few failures.SOLUTION: A drilling device X has: a guide cell 1 extending toward a ground G; a drifter 3 moving back and forth along the guide cell 1; a rod 2 supported by the drifter 3 and extending along the guide cell 1; and a bit 4 provided at a tip of the rod 2 and used for drilling the ground G. An auxiliary tool 10 is provided at the tip of the guide cell 1. The auxiliary tool 10 has: an outer pipe 11 whose diameter increases from a base end edge 11A toward a front end edge 11B; and an inner pipe 12 that passes through the outer pipe 11 and has a base edge 12A that is continuous with the base edge 11A of the outer pipe 11. Also the rod 2 is configured to pass through the inside of the inner pipe 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a boring device for boring ground such as a slope or a tunnel face.

A drilling device is used when drilling a slope for driving a rock bolt or the like in slope reinforcement work or when drilling a tunnel face. As this drilling device, for example, there is one disclosed in Patent Document 1. The hole drilling device (rock drilling machine) of the same document describes that "a suction hood that supports the tip of a rod having a bit fixed to the tip along the guide shell and that covers the rock drilled by the bit slides on the guide shell. It is movably supported and the suction hood and the guide shell are connected by a cylinder device." When this drilling device is used, the drilling waste soil generated by drilling and flying in the air is collected in the suction hood. However, it is considered that the hole drilling device of the document is prone to failure due to various causes.

Japanese Utility Model Publication No. 59-35492

The main problem to be solved by the present invention is to provide a drilling device with few failures.

Means for solving the above problems are as follows.
(Means according to claim 1)
A guide cell that extends toward the ground, a drifter that moves back and forth along this guide cell, a rod that is supported by this drifter and extends along the guide cell, and the ground provided at the tip of this rod. Has a bit for drilling,
Auxiliary equipment is provided at the tip of the guide cell,
The auxiliary tool includes an outer tube having a diameter that increases from a base edge located on the drifter side toward a tip edge located on the ground side, and a base edge passing through the outer tube and a base edge of the outer tube. Has a continuous inner tube,
The rod is configured to pass through the inside of the inner pipe,
A drilling device characterized by the above.

(Means according to claim 2)
The inner tube has a tip edge projecting toward the ground side more than a tip edge of the outer tube,
The drilling device according to claim 1.

(Means according to claim 3)
A suction port is formed in the outer tube,
The hole excavated soil flowing between the outer pipe and the inner pipe is discharged from the suction port.
The hole drilling device according to claim 1 or 2.

(Means according to claim 4)
A support fixed to the guide cell, and a shock absorber fixed to the support and extending and contracting along the guide cell,
The auxiliary tool is fixed to the shock absorber,
The hole drilling device according to any one of claims 1 to 3.

(Means according to claim 5)
At the tip of the guide cell, there is provided a measuring means having a photographing device for photographing the ground and three or more rangefinders for measuring the distance to the ground,
This measuring means is located closer to the drifter than the auxiliary tool is,
The hole drilling device according to any one of claims 1 to 4.

According to the present invention, the drilling device has few failures.

It is a side view of a drilling device. It is sectional drawing of the auxiliary tool which concerns on another form. It is an example of use of a drilling device.

Next, modes for carrying out the invention will be described. The present embodiment is an example of the present invention. The scope of the present invention is not limited to the scope of this embodiment.

FIG. 1 shows a hole drilling device X according to this embodiment. The drilling device X of the present embodiment includes a guide cell 1 extending toward a ground G such as a slope (inclined surface) (see FIG. 3), and a back-and-forth movement along the guide cell 1 (the tip of the guide cell 1). Side and rear end side), a rod 2 supported by the drifter 3 and extending along the guide cell 1, and a bit 4 provided at the tip of the rod 2 for boring the ground G. Have.

The guide cell 1 is linear and long. The length of the guide cell 1 is, for example, 2 to 10 m. The guide cell 1 is guided (point set) so as to form an appropriate angle with respect to the ground G at the time of boring, and in the present embodiment, be vertical. An example of this guidance will be described later.

The rod 2 has a rod shape, and has, for example, a substantially circular cross section, a substantially square cross section, or the like.

The drifter 3 rotates and strikes the rod 2 and the bit 4. Due to this rotation and impact, the drilling of the ground G proceeds.

The bit 4 is abutted against the ground G to drill (drill) the ground G. The diameter of the bit 4 is, for example, 38 to 65 mm.

In addition to the above, the drilling device X of the present embodiment is provided with the auxiliary tool 10. The auxiliary tool 10 is located at the tip of the guide cell 2. As shown in detail in FIG. 2, the auxiliary tool 10 has a double pipe structure having an outer pipe 11 and an inner pipe 12.

The outer tube 11 has a trumpet shape (trumpet tube) whose diameter gradually increases from the base edge 11A toward the tip edge 11B. The presence of the outer pipe 11 prevents the excavated soil Gx from scattering, and prevents the excavated soil Gx from scattering around the drilled surface (G), for example, on the road.

In the present specification, the drifter 3 side is the base edge 11A and the ground G side is the tip edge 11B (the same applies to the inner pipe 12). Further, it cannot be denied that there is a region in which the diameter does not widen from the base edge 11A toward the tip edge 11B in a part of the outer tube 11.

On the other hand, the inner pipe 12 passes through the inside of the outer pipe 11, and the base end edge 12A on the drifter 3 side is connected (connected) to the base end edge 11A of the outer pipe 11. The inner pipe 12 is arranged coaxially with the outer pipe 11. The rod 2 of the drilling device X passes through the inside of the inner pipe 12.

The inner tube 12 has a tip edge 12B located on the ground G side that projects more toward the ground G side than a tip edge 11B of the outer tube 11. The protrusion length L1 is, for example, 3 to 15 cm, preferably 5 to 10 cm. As shown in FIG. 3, the tip of the inner pipe 12 (the portion protruding from the outer pipe 11) can be fitted (inserted) into the drilled hole C during drilling. When the tip portion of the inner pipe 12 is fitted into the drilling hole C, vibration in the drilling direction (the extending direction of the guide rail 1 and the rod 2) at the time of drilling is suppressed, and the drilling device X The number of breakdowns is reduced.

The outer tube 11 of the present embodiment may have a suction port 13A, if necessary, as shown in FIG. 2 as another example of the embodiment. In this form, the suction pipe 13 faces (communicates with) the inside of the outer pipe 11 via the suction port 13A. In the case where the suction port 13A and the suction pipe 13 are provided, the excavated soil Gx flowing between the outer pipe 11 and the inner pipe 12 is discharged from the suction port 13A and sent to an appropriate place through the suction pipe 13. .. The flow of the excavated soil Gx may be positively created by connecting a suction device (not shown) to the suction pipe 13, or may be left naturally. Further, as shown in FIGS. 1 and 3, the suction pipe 13 and the suction port 13A may not be provided.

The hole-excavating soil Gx means earth and sand or the like derived from the ground G that is discharged along with the drilling of the ground G and jumps up toward the drilling device X or soars.

From the viewpoint of preventing the drilling soil Gx from being caught on the drifter 3 and the measuring means 5 described later, and from the viewpoint of smoothly discharging (processing) through the inside of the outer pipe 11, the diameter expansion angle α of the outer pipe 11 (See FIG. 2) is preferably 20 to 40°, for example. In this respect, if the diameter expansion angle α is too small, the excavated earth and sand Gx will easily enter the space between the rod 2 in the inner pipe 12 and the drilling device X may malfunction. From the same viewpoint as this problem, it is important that the base end edge 11A of the outer pipe 11 and the base end edge 12A of the inner pipe 12 are connected to each other, and the excavated soil Gx does not pass through to the drifter 3 or the measuring means 5 side. Have meaning.

As shown in FIGS. 1 and 3, the drilling device X of the present embodiment further includes a support tool 16 fixed to the guide cell 1 and a cushion tool 17 fixed to the support tool 16. The support tool 16 extends vertically upward with respect to the guide cell 1. Further, the cushioning tool 17 extends vertically forward (on the ground G side) with respect to the support tool 16.

The cushioning tool 17 expands and contracts (extends and contracts) in the extending direction of the cushioning tool 17, that is, in the extending direction of the guide cell 1 (along the guide cell 1). The shock absorber 17 is made of, for example, a spring or a material having elasticity.

The auxiliary tool 10 described above is fixed to the tip end portion (ground G side) of the cushioning tool 17. As shown in FIG. 3, the assisting tool 10 of the present embodiment is abutted against the ground G at the time of drilling. With the above configuration, the presence (interposition) of the cushioning tool 17 constitutes the drilling device X. Vibration transmission to other devices, for example, the drifter 3 and the measuring means 5 is suppressed. Therefore, the drilling device X is less likely to fail.

The drilling device X of this embodiment is further provided with a measuring means 5. The measuring means 5 is located at the tip of the guide cell 1 and closer to the drifter 3 than the auxiliary tool 10. Therefore, the excavation soil Gx is unlikely to be applied to the measuring unit 5, and the measuring unit 5 is less likely to malfunction. Further, as described above, since the excavated soil Gx is prevented from scattering due to the presence of the auxiliary tool 10, a poor visibility does not occur, and there is no possibility that the measurement means 5 measures various information.

Various functions and configurations of the measuring means 5 can be considered. The measuring means 5 of the present embodiment includes a camera (not shown) that photographs the ground G, and three or more distance meters (not shown) that measure the distance to the ground G.

The imager can be used, for example, to position the guide cell 1 before drilling. The photographing device is composed of, for example, a video camera. Further, in the present embodiment, it is assumed that the number of image capturing devices is one, but the number of image capturing devices may be two or more.

The rangefinder can be used to calculate the attitude angle of the guide cell 1, that is, the tilt angle and the horizontal (azimuth) angle based on the obtained (measured) distance information. In this respect, a plurality of rangefinders, three or more, are required.

The inclination angle and the horizontal angle obtained by the distance meter are relative angles with respect to the ground (inclined surface) G, and are not absolute angles with respect to the ground (horizontal surface) on which the supporting means 7 described later is installed. Therefore, according to this embodiment, the guide cell 1 can be guided to an appropriate angle even if the ground G formed of a slope or the like has a constant (uniform) inclination.

(Other)
The drilling device X of the present embodiment is supported by, for example, a supporting means 7 conceptually shown in FIG. The support means 7 is composed of, for example, a heavy machine capable of traveling on the ground (flat ground) such as a backhoe or a rough terrain crane.

The support means 7 is provided with an arm or the like (not shown), and the guide cell 1 is attached to a tip end portion of the arm via a rotation base or the like (not shown). This attachment is performed so that the guide cell 1 can rotate (turn) at the tip of the arm. Therefore, the drilling device X including the guide cell 1 is guided by, for example, the rotation of the guide cell 1, the bending of the arm, the rotation of the main body of the supporting means 7, and the like.

The support means 7 is equipped with a display means 8 for displaying photographing information obtained by the above-described photographing device, distance information obtained by a rangefinder, a measurement value obtained by a length measuring instrument described later, and the like. It is preferable to do so. In this respect, it is sufficient that the operator of the supporting means 7 can directly visually recognize the drilling position, but this visual recognition is usually difficult. Therefore, the present embodiment is configured such that the operator of the supporting means 7 guides (point-sets) the guide cell 1 based on various information displayed on the display means 8. According to this aspect, it is not necessary to give an instruction to the operator of the support means 7 for guiding the drilling device X from another worker (a so-called hand guiding member) arranged at the drilling position, which saves labor. It becomes possible. It should be noted that, in the above-described image capturing device, the orientation and the image capturing range are set so that the above object is achieved. Further, the transmission of various information (signals) to the display means 8 is usually a wireless system.

The calculated values of the tilt angle and the horizontal angle can be displayed on the display means 8 as they are. However, it is preferable to display the difference between the calculated value and the preset design value together with the calculated value or in place of the calculated value. When the difference is displayed, the operator can easily recognize it and the guide cell 1 can be easily guided. The design value is a preset value at which angle the ground G is to be drilled.

The hole drilling device X of the present embodiment can be provided with, for example, a length measuring device (not shown) such as an encoder. This length measuring device is preferably provided at the rear end of the guide cell 1 and measures the distance to the drifter 3 (drifter position grasping type). According to the drifter position grasping type, it is possible to prevent the failure of the length measuring device as much as possible. As a concrete configuration of the drifter position grasping type, for example, consider a mode in which a length measuring device is provided with a cord material composed of a wire that can be unwound and rewound, and the tip of the cord material is fixed to the drifter 3. You can In this embodiment, for example, a drilling length of 1 to 8 m is assumed.

The measured value obtained by the length measuring device is preferably sent to the display means 8 and displayed on the display means 8. According to this mode, the operator of the supporting means 7 can confirm how much the drilling is currently performed. As a result, it is not necessary for another worker (a so-called guide member) to insert a measuring scale or the like into the drilling hole C at the drilling position of the ground G to measure the drilling hole length, thereby realizing labor saving. ..

The above-mentioned measuring means 5 can be configured such that the above-mentioned photographing device, range finder and the like are housed in a box. In this case, the box body has a substantially U shape. In this U-shape, the opening portion faces downward, and the rod 2 passes through the opening portion.

In the box body, other measuring means such as a gyroscope, an accelerometer, an inertial measurement unit (IMU) combining these, a GPS, and the like can be provided in addition to the photographing device and the distance meter. In this respect, by using the accelerometer, it is possible to measure the roll angle (the rotation angle about the axial direction of the rod 2) and the tilt angle of the drilling device X including the guide cell 1. The roll angle and the inclination angle are different from the relative angle (angle with respect to the ground G) measured by the above-described three or more distance meters, and are the absolute angle of the support means 7 or the installation ground of the support means 7.

The roll angle and the tilt angle described above can also be displayed on the display unit 8. This display can be displayed together with the tilt angle and the horizontal angle described above, or can be displayed so as to be switchable with these.

INDUSTRIAL APPLICABILITY The present invention can be used as a boring device for boring ground (drilling surface) such as a slope or a tunnel face.

DESCRIPTION OF SYMBOLS 1 Guide cell 2 Rod 3 Drifter 4 Bit 5 Measuring means 7 Supporting means 8 Display means 10 Auxiliary tool 11 Outer tube 11A Base edge 11A (of outer tube) Tip edge 12 Inner tube 12A (of inner tube) Proximal edge 12B (Inner tube) tip edge 13 Suction tube 13A Suction port 16 Support tool 17 Cushion tool C Drilling G Ground X Drilling device

Claims (5)

A guide cell that extends toward the ground, a drifter that moves back and forth along this guide cell, a rod that is supported by this drifter and extends along the guide cell, and the ground provided at the tip of this rod. Has a bit for drilling,
Auxiliary equipment is provided at the tip of the guide cell,
The auxiliary tool includes an outer tube having a diameter that increases from a base edge located on the drifter side toward a tip edge located on the ground side, and a base edge passing through the outer tube and a base edge of the outer tube. Has a continuous inner tube,
The rod is configured to pass through the inside of the inner pipe,
A drilling device characterized by the above. The inner tube has a tip edge projecting toward the ground side more than a tip edge of the outer tube,
The drilling device according to claim 1. A suction port is formed in the outer tube,
The hole excavated soil flowing between the outer pipe and the inner pipe is discharged from the suction port.
The hole drilling device according to claim 1 or 2. A support fixed to the guide cell, and a shock absorber fixed to the support and extending and contracting along the guide cell,
The auxiliary tool is fixed to the shock absorber,
The hole drilling device according to any one of claims 1 to 3. At the tip of the guide cell, there is provided a measuring means having a photographing device for photographing the ground and three or more rangefinders for measuring the distance to the ground,
This measuring means is located closer to the drifter than the auxiliary tool is,
The hole drilling device according to any one of claims 1 to 4.

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