JP7186077B2 - drilling equipment - Google Patents

Description

The present invention relates to drilling equipment.

Conventionally, as one of the techniques for forming an excavation hole by excavating the ground in the vertical direction, an excavation rod provided along the vertical direction and an excavation bit provided at the lower end of the excavation rod, It is a drilling rig that has a pen tip shape that tapers toward the lower end, and a drilling rig that performs rotary excavation of the ground with the drilling bit as the drilling rod rotates has been proposed (for example, Patent Document 1). reference).

Japanese Unexamined Patent Application Publication No. 2013-204401

However, in the above-described conventional excavator, since the shape of the excavation bit is pen tip-shaped as described above, the excavation bit may be tilted with respect to the vertical direction when, for example, relatively hard ground is excavated. There is room for improvement from the viewpoint of accurately forming the borehole, since the borehole tends to be bent in the

SUMMARY OF THE INVENTION It is an object of the present invention to provide an excavator capable of accurately forming an excavation hole.

In order to solve the above-described problems and achieve the object, the excavating apparatus according to claim 1 is an excavating apparatus for forming an excavation hole by excavating the ground along an excavating direction. a main body, a plurality of claws provided at an end portion of the excavating device main body on the excavating direction side, and guide means provided at a peripheral edge of an end portion on the excavating direction side of the excavating device main body or in the vicinity thereof, a guide means for guiding the excavation direction; and a centering portion provided at a central portion of an end portion of the excavator main body on the excavation direction side, wherein the guide means includes the plurality of claw portions. Among them, a plurality of first claw portions provided on a peripheral edge of an end portion on the excavation direction side of the excavating device main body, and the plurality of claw portions include the plurality of first claw portions and the excavating device main body. A plurality of second claws provided at a portion inside the peripheral edge of the end portion on the excavation direction side, the plurality of second claws being formed to protrude in the excavation direction more than the plurality of first claws. and a plurality of second claws, wherein the centering portion protrudes in the excavation direction more than the plurality of first claws and extends further in the excavation direction than the plurality of second claws. Form so that it does not protrude.

A drilling rig according to claim 2 is the drilling rig according to claim 1, wherein the vertical length of the drilling rig body is longer than the diameter of the drilling rig body.

According to the excavating apparatus of claim 1, the plurality of claws provided at the end portion of the excavating direction side of the excavating apparatus main body, and the claw portions provided at or near the periphery of the excavating direction side end portion of the excavating apparatus main body Since the guide means is provided for guiding the excavation direction, the excavation direction of the excavator can be guided by the guide means. Therefore, compared with the conventional technology (technology for forming a drilling hole using a pen-tip-shaped drilling bit), it is possible to suppress the occurrence of bending of the drilling hole and to accurately form the drilling hole.
Further, since the guide means are the plurality of first claw portions provided at the periphery of the end portion of the excavating device main body in the excavation direction, among the plurality of claw portions, a large scale for suppressing the bending of the excavation hole is required. It can be configured relatively easily without using tools or the like, and the manufacturability of the excavator can be improved.
Further, the plurality of claw portions are a plurality of first claw portions and a plurality of second claw portions provided inside the peripheral edge of the excavating direction side end portion of the excavator main body. and a plurality of second claws formed to protrude in the excavation direction more than the first claw. In comparison, the ground can be excavated efficiently, and the excavation performance of the excavator can be easily improved.
In addition, since the centering portion is formed so as to protrude in the excavation direction more than the plurality of first claw portions and less than the plurality of second claw portions in the excavation direction, the first claw portion and the second claw portion The excavator main body can be centered while the two claws are functioning, and the excavation hole can be accurately formed.

According to the excavating apparatus of claim 2, the vertical length of the excavating apparatus main body is made longer than the diameter of the excavating apparatus main body. Compared to the case where the length is also shortened, it is possible to increase the portion of the outer peripheral surface of the excavator body that can come into contact with the side wall portion of the excavation hole, thereby further suppressing the occurrence of bending of the excavation hole.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the outline of the earth drill machine which concerns on Embodiment 1 of this invention. 2 is an enlarged view of a region of the drilling rig of FIG. 1; FIG. It is a figure which shows an excavator, (a) is a side view, (b) is a bottom view. FIG. 3 is a diagram showing an excavating apparatus according to Embodiment 2, and is a diagram showing a region corresponding to FIG. 2. FIG. It is a figure which shows the excavator of the state which removed the casing part, (a) is a side view, (b) is a bottom view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments of an excavator according to the present invention will be described in detail below with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be described, then [II] the specific contents of the embodiment will be described, and finally [III] modifications of the embodiment will be described. However, the present invention is not limited by the embodiment.

[I] Basic concept of the embodiment First, the basic concept of the embodiment will be described. Embodiments generally relate to a drilling apparatus for drilling ground along a drilling direction to form a drill hole.

Here, the type of "ground" is a concept that includes, for example, natural ground and artificially formed ground (eg embankment). Further, the types of "excavating equipment" include, for example, pile-burying excavating equipment, soil improvement excavating equipment, tunnel excavating equipment, and the like. Also, the "drilling direction" of the drilling device corresponds to, for example, the vertical direction, the horizontal direction, and the like. In the following embodiments, a description will be given of a case where the excavating apparatus is a pile-burying excavating apparatus that forms an excavation hole by excavating the ground downward.

[II] Specific contents of the embodiment Next, specific contents of the embodiment will be described.

[Embodiment 1]
First, an excavator according to Embodiment 1 will be described. This Embodiment 1 is a mode in which the guide means is a plurality of first claw portions which will be described later.

(Constitution)
First, the configuration of an earth drilling machine to which the drilling apparatus according to Embodiment 1 is applied will be described. FIG. 1 is a side view showing an outline of an earth drilling machine according to Embodiment 1 of the present invention. In the following description, the X direction in FIG. 1 is the left-right direction of the earth drill machine (-X direction is the left direction of the earth drill machine, +X direction is the right direction of the earth drill machine), and the Y direction in FIG. The longitudinal direction of the machine (+Y direction is the front direction of the earth drill machine, -Y direction is the rear direction of the earth drill machine), the Z direction in Fig. 1 is the vertical direction of the earth drill machine (+Z direction is the upward direction of the earth drill machine, - The Z direction is referred to as the down direction of the earth drilling machine).

The earth drill machine 1 is for forming a bore hole DH in the ground G by rotating a drilling device 40, and as shown in FIG. A drilling rig 40 is provided.

(Construction - main unit)
The main body 10 is a basic structure that constitutes the earth drill machine 1 . The main body 10 is constructed using, for example, a known main body for an earth drill machine, and as shown in FIG. , and a boom section 14 .

Among these, the traveling portion 11 is for the main body portion 10 to travel on the ground, and is configured using, for example, a known traveling portion for an earth drill machine (for example, a crawler type traveling portion). . The turning section 12 is for turning the control section 13 and the boom section 14. For example, the turning section 12 is configured using a known turning section for an earth drill machine. and is connected to the traveling part 11 so as to be able to turn in the horizontal direction. Further, the control section 13 is for controlling the earth drill machine 1, and is configured using, for example, a known control room for an earth drill machine. is set up. The boom section 14 is for suspending the connection section 30 and the excavator 40, and is configured using, for example, a known boom for an earth drill machine (for example, a boom that can be extended and contracted in the longitudinal direction). As shown in FIG. 1, it is installed so as to protrude upward from the revolving portion 12 .

(Construction-rotation drive unit)
The rotation drive unit 20 is for rotating the connection unit 30 about a rotation axis substantially along the vertical direction. The rotary drive unit 20 is configured using, for example, a known rotary drive unit for an earth drill machine, and as shown in FIG. It is electrically connected to a control device (not shown) provided in the control unit 13 of the main body 10 via wiring (not shown) (that is, based on a control signal from the control device, The rotary drive unit 20 drives).

(Construction-Connector)
The connection portion 30 is for connecting the boom portion 14 of the main body portion 10 and the excavator 40 . The connecting portion 30 is configured by using, for example, a long kelly bar for a known earth drill machine, and as shown in FIG. , the connecting portion 30 is arranged so that the longitudinal direction of the connecting portion 30 extends along the vertical direction, and is suspended from the boom portion 14 via the wire 10a.

(Configuration - drilling equipment)
FIG. 2 is an enlarged view of an area of drilling rig 40 of FIG. 3A and 3B are diagrams showing the excavator 40, in which FIG. 3A is a side view and FIG. 3B is a bottom view. The drilling device 40 is a device for forming a drilled hole DH in the ground G by drilling the ground G along the drilling direction (specifically, downward). As shown in FIGS. 1 and 2, it is provided at the lower end of the connecting portion 30, and as shown in FIGS. A portion 44 is provided.

(Configuration - drilling rig - drilling rig body)
Returning to FIG. 2 , the drilling rig body 41 is the basic structure of the drilling rig 40 . The excavator main body 41 is formed of, for example, a steel hollow body (for example, a hollow columnar body) or the like, and as shown in FIG. are arranged so that the axial direction of is along the vertical direction, and are connected to the connecting portion 30 by a fixture or the like.

Further, the specific size of the excavator main body 41 can be arbitrarily set as long as the desired excavation hole DH can be formed, but in the first embodiment, it is set as follows. That is, as shown in FIG. 2, the diameter of the excavator main body 41 is set to be substantially the same (or slightly smaller) than the diameter of the excavation hole DH. In addition, the vertical (axial) length of the excavator main body 41 is set shorter than the diameter of the excavation hole DH.

(Configuration - drilling device - first claw)
The first claw portion 42 is guide means for guiding the direction of excavation. The first claw portion 42 is formed of, for example, a steel plate-like body having a sharp tip (lower end in FIGS. 2 and 3), and is formed on the peripheral edge of the excavating direction side of the drilling device main body 41 ( In FIGS. 2 and 3, a plurality of them are provided (in the embodiment, two are provided) on the periphery of the lower end portion of the excavator main body 41). Specifically, as shown in FIGS. 2 and 3, they are arranged so as to protrude in the excavation direction from the lower end of the excavator main body 41 and are fixed to the excavator main body 41 .

(Configuration - drilling device - second claw)
Returning to FIG. 2, the second claw portion 43 is for excavating the ground G. As shown in FIG. The second claw portion 43 is formed of, for example, a steel plate-like body having a sharp tip (lower end in FIGS. 2 and 3). A plurality of them are provided inside the peripheral edge. Specifically, as shown in FIGS. 2 and 3, each is arranged so as to protrude downward from the lower end of the excavator main body 41 and extends in one direction (the front-rear direction in FIG. 3(b)). They are arranged parallel to each other and fixed to the excavator main body 41 respectively.

Further, although the specific configuration of the second claw portions 43 is arbitrary, in the first embodiment, each of the plurality of second claw portions 43 is directed toward the excavation direction from the plurality of first claw portions 42. Each is formed to protrude. Specifically, as shown in FIGS. 2 and 3, the length of the second claw portion 43 in the vertical direction is set longer than the length of the first claw portion 42 in the vertical direction. With such a configuration, compared with the case where the second claw portion 43 is formed flush with the first claw portion 42, the ground G can be excavated efficiently, and the excavation performance of the excavator 40 is improved. becomes easier to increase. In addition, what consists of the above-mentioned "first claw portion 42" and "second claw portion 43" corresponds to "a plurality of claw portions" in the scope of claims.

(Configuration - drilling equipment - centering part)
The centering part 44 is a centering means for centering the excavator body 41 when the ground G is excavated. Here, "centering" means aligning the center position of the end portion of the drilling device main body 41 in the drilling direction with the center position of the drilling hole DH. The centering part 44 is formed of, for example, a steel plate-like body having a sharp tip (lower end in FIG. 3), and is located at the center of the end of the drilling device main body 41 in the excavation direction. is provided. Specifically, they are arranged so as to protrude downward from the lower end portion of the drilling device main body 41 and are fixed to the drilling device main body 41 .

Further, although the specific configuration of the centering portion 44 is arbitrary, in the first embodiment, it protrudes in the excavation direction more than the plurality of first claw portions 42 and more than the plurality of second claw portions 43. It is formed so as not to protrude toward the excavation direction. Specifically, the vertical length of the centering portion 44 is set longer than the vertical length of the first claw portion 42 and shorter than the vertical length of the second claw portion 43 . With such a configuration, it is possible to center the excavator main body 41 while allowing the first claw portion 42 and the second claw portion 43 to function, and to accurately form the excavation hole DH.

The drilling device 40 may be formed by any method, but for example, the drilling device main body 41, the first claw portion 42, the second claw portion 43, and the centering portion 44 are formed separately. The first claw portion 42, the second claw portion 43, and the centering portion 44 may be formed later by connecting them to the excavator main body 41 by welding or the like. Alternatively, the excavator main body 41, the first claw portion 42, the second claw portion 43, and the centering portion 44 may be integrally formed by bending a steel material.

With the excavating device 40 as described above, the excavating direction of the excavating device 40 can be guided by the first claw portion 42 . Therefore, it is possible to suppress the occurrence of bending of the drilled hole DH and to accurately form the drilled hole DH as compared with the conventional technology (technology for forming a drilled hole using a pen tip-shaped drill bit). . In particular, since the guide means is the first claw portion 42, it can be constructed relatively simply without using a large-scale tool or the like for suppressing the bending of the drilling hole DH, and the manufacturability of the drilling device 40 can be improved. can.

(Action of earth drill machine)
Next, the operation of the earth drilling machine 1 configured in this manner will be described.

That is, for example, when the excavator main body 41 of the excavator 40 is rotated by the rotation drive unit 20 via the connection unit 30, the ground G is moved by the plurality of second claws 43 of the excavator 40 in the excavation direction (specifically, , downward). Further, when the centering portion 44 comes into contact with the excavation surface DS of the ground G while the second claw portion 43 is excavating the ground G, the excavation device main body 41 is centered. can be formed accurately. Further, when the excavation direction of the ground G is being excavated by the second claws 43, if the excavation direction is inclined with respect to the vertical direction, at least a part of the plurality of first claws 42 may be an excavation surface DS of the ground G. By contacting with , the inclination is suppressed by the first claw portion 42, and the excavation direction is guided so that the excavation direction is along the vertical direction, so that the occurrence of bending of the excavation hole DH is suppressed. becomes possible.

(Effect of Embodiment)
As described above, according to Embodiment 1, the plurality of claw portions provided at the end portion of the excavating-direction side of the excavating-device main body 41 and the claw portions provided at or near the edge portion of the excavating-direction-side end portion of the excavating-device main body 41 and the guide means for guiding the excavation direction, the excavation direction of the excavator 40 can be guided by the guide means. Therefore, it is possible to suppress the occurrence of bending of the drilled hole DH and to accurately form the drilled hole DH as compared with the conventional technology (technology for forming a drilled hole using a pen tip-shaped drill bit). .

Further, since the guide means is the plurality of first claw portions 42 provided on the periphery of the end portion of the drilling device main body 41 on the excavation direction side, among the plurality of claw portions, the hole bending of the excavation hole DH is suppressed. It can be configured relatively simply without using a large-scale instrument or the like, and the manufacturability of the excavator 40 can be improved.

Further, the plurality of claw portions are the plurality of first claw portions 42 and the plurality of second claw portions 43 provided inside the peripheral edge of the end portion on the excavation direction side of the excavator main body 41, and a plurality of second claw portions 43 formed so as to protrude in the excavation direction more than the plurality of first claw portions 42 , so that the second claw portions 43 are flush with the first claw portions 42 . The ground G can be excavated more efficiently, and the excavation performance of the excavator 40 can be improved more easily than in the case of forming so as to be.

In addition, since the centering portion 44 is formed so as to protrude in the excavation direction more than the plurality of first claw portions 42 and not more than the plurality of second claw portions 43 in the excavation direction, the first claws The excavator body 41 can be centered while the portion 42 and the second claw portion 43 are functioning, and the excavation hole DH can be accurately formed.

[Embodiment 2]
Next, a drilling device according to Embodiment 2 will be described. This Embodiment 2 is a mode in which the guide means is a casing portion which will be described later. However, the configuration of the second embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified. If necessary, the same reference numerals and/or names as those described above are attached, and the description thereof is omitted.

(Constitution)
First, the configuration of an earth drilling machine to which the drilling apparatus according to Embodiment 2 is applied will be described. An earth drilling machine 100 according to the second embodiment is configured substantially in the same manner as the earth drilling machine 1 according to the first embodiment. However, the details of the configuration of the excavator 110 are devised as described below.

(Configuration - details of drilling rig configuration)
Next, the details of the configuration of the excavator 110 will be described. FIG. 4 is a diagram showing excavator 110 according to Embodiment 2 of the present invention, and is a diagram showing a region corresponding to FIG. 5A and 5B are diagrams showing the excavator 110 from which a casing part 113, which will be described later, is removed. FIG. 5A is a side view, and FIG. 5B is a bottom view. As for features of the drilling device 110 according to Embodiment 2, the drilling device 110 includes a drilling device main body 111, a claw portion 112, and a casing portion 113, as shown in FIGS.

(Configuration - details of drilling rig configuration - drilling rig body)
The excavator main body 111 is configured using, for example, a known excavator bucket (for example, a screw type bucket), and as shown in FIG. I have.

Of these, the shaft portion 111 a is the basic structure of the excavator main body 111 . The shaft portion 111a is formed of, for example, a long steel rod-like body, and as shown in FIG. , and the axial direction of the shaft portion 111a is arranged along the vertical direction on the lower side of the connection portion 30, and is connected to the connection portion 30 by a fixture or the like. Further, the fin portion 111b supports the claw portion 112 and agitates the soil excavated by the claw portion 112. As shown in FIG. The fin portion 111b is formed of, for example, a plate-like body made of steel, and as shown in FIG. It is fixed to 111a by welding or the like. Although the outer diameter of the fin portion 111b is arbitrary, it may be set longer than the length of the shaft portion 111a in the vertical direction (that is, the length of the excavator main body 111 in the vertical direction is equal to the length of the excavator body 111). It may be set shorter than the diameter of the main body 111). The head portion 111c is for excavating the ground, and is configured using a head portion (eg, an auger head) for a known excavator, for example, and is provided at the lower end portion of the shaft portion 111a. It is detachably fixed to the shaft portion 111a.

(Composition-details of the configuration of the drilling rig-claw)
The claw portion 112 is for excavating the ground G. The claw portion 112 is configured using, for example, a known claw portion for excavating equipment (for example, a steel claw portion) or the like. ing. Specifically, as shown in FIG. 5, they are arranged so as to protrude downward from the outer edge of the side surface of the fin portion 111b on the excavation direction side, and are detachably fixed to the fin portion 111b. there is

(Construction-Details of Drilling Rig Construction-Casing)
Returning to FIG. 4, the casing part 113 is guide means for guiding the excavation direction. The casing portion 113 is formed of, for example, a hollow body (eg, a long hollow cylindrical body) with an open bottom surface. Specifically, as shown in FIG. 4, a first casing portion 113a having an open upper surface and a lower surface and covering the lower portion of the excavator main body 111, and a A second casing part 113b that covers the upper part and has an open bottom surface, and the lower part of the second casing part 113b is inserted into the first casing part 113a through the upper open end of the first casing part 113a. and a second casing portion 113b. In addition, the casing part 113 is provided in the vicinity of the peripheral edge of the excavating direction side of the excavating device main body 111. Specifically, as shown in FIG. and is arranged so as to surround the periphery of the excavator main body 111, and is detachably fixed to the shaft portion 111a.

With the excavating apparatus 110 as described above, the casing portion 113 can guide the excavating direction of the excavating apparatus 110 . Therefore, it is possible to suppress the occurrence of bending of the drilled hole DH and to accurately form the drilled hole DH as compared with the conventional technology (technology for forming a drilled hole using a pen tip-shaped drill bit). . In particular, since the guide means is the casing portion 113, the bending of the excavation hole DH can be suppressed regardless of the configuration of the excavator main body 111, and the degree of freedom in designing the excavator main body 111 can be increased.

(Action of earth drill machine)
Next, the action of the earth drilling machine 100 configured as described above will be described.

That is, for example, when the excavator main body 111 of the excavator 110 is rotated by the rotation drive unit 20 via the connection unit 30, the ground G is moved in the excavation direction (specifically, below). Further, when the ground G is excavated by the claw portion 112, if the excavation direction is inclined with respect to the vertical direction, the casing portion 113 contacts the side wall surface of the excavation hole DH. Since the excavation direction is guided so that the excavation direction is along the vertical direction, it is possible to suppress the occurrence of bending of the excavation hole DH.

(Effect of Embodiment)
As described above, according to the second embodiment, the guide means is the casing portion 113 provided in the vicinity of the peripheral edge of the excavating direction side of the excavating device main body 111 so as to surround the peripheral edge of the excavating device main body 111 . Since the casing portion 113 is arranged in the outer circumference, it is possible to suppress bending of the excavation hole DH without being affected by the configuration of the excavator main body 111, and to increase the degree of freedom in designing the excavator main body 111.

[III] Modifications to the Embodiments Although the embodiments of the present invention have been described above, specific configurations and means of the present invention are within the scope of the technical ideas of each invention described in the claims. , can be arbitrarily modified and improved. Such modifications will be described below.

(Problem to be solved and effect of invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves problems not described above or achieves effects not described above. and may solve only part of the problems described or provide only part of the advantages described.

(Regarding shapes, numbers, structures, and time series)
With respect to the components illustrated in the embodiments and drawings, the shape, numerical value, structure of multiple components, or time-series interrelationships may be arbitrarily modified and improved within the scope of the technical idea of the present invention. can be done.

(Use and application of drilling equipment)
In Embodiments 1 and 2 described above, the excavator is used to form the excavation hole DH in the ground G, but the present invention is not limited to this. For example, after the drilling hole DH drilled by a conventional drilling device (a drilling device having a pen tip-shaped drilling bit) is bent, it is used to correct the hole bending by drilling the drilling hole DH. may be

Further, in the first and second embodiments described above, the drilling apparatus is applied to the case of forming the drilled hole DH in the earth drilling method using the earth drill machine, but the present invention is not limited to this. For example, it may be applied when forming the excavation hole DH by a construction method other than the earth drill construction method (for example, a reverse construction method, etc.).

(About the drilling rig body)
In the first embodiment, the excavator main body 41 is described as a hollow columnar body, but it is not limited to this, and may be a polygonal column such as a rectangular parallelepiped or an elliptical columnar body.

Further, in the first embodiment described above, the vertical length of the drilling device main body 41 is set to be shorter than the diameter of the drilling device main body 41, but the present invention is not limited to this. may be set longer than the diameter of the excavator main body 41 . As a result, compared to the case where the vertical length of the drilling device body 41 is shorter than the diameter of the drilling device body 41, the portion of the outer peripheral surface of the drilling device body 41 that can come into contact with the side wall portion of the drilling hole DH is reduced. can be increased, and the occurrence of hole bending in the drilled hole DH can be further suppressed.

Further, in the second embodiment, the excavator main body 111 is configured by a screw-type bucket, but the present invention is not limited to this. may be In this case, the claw portion 112 is provided at or near the lower end portion of the excavator main body 111 .

(Regarding the first claw)
In the first embodiment described above, the number of the first claw portions 42 installed is two, but the number is not limited to this, and the number may be three or more.

(Regarding the second claw)
In the first embodiment described above, the plurality of second claw portions 43 are arranged side by side substantially along a predetermined direction at the lower end portion of the drilling device main body 41. However, this is not restrictive. They may be randomly arranged at the lower end of the body 41 .

(Regarding the centering part)
In the first embodiment described above, the excavator 40 has the centering part 44, but the present invention is not limited to this, and the centering part 44 may be omitted, for example.

(About casing)
In the second embodiment, casing part 113 is described as having a hollow columnar shape with an open bottom surface. It may be an open elliptical cylinder.

(Appendix)
The drilling rig of Supplementary Note 1 is a drilling rig for forming an excavation hole by excavating the ground along the excavation direction, and includes a drilling rig body and an end portion of the drilling rig body on the excavation direction side. and guide means provided at or near an end peripheral edge of the excavating device main body in the excavating direction for guiding the excavating direction.

The excavating rig according to Supplementary Note 2 is the excavating rig according to Supplementary Note 1, wherein the guide means is a casing portion provided in the vicinity of a peripheral edge of an end portion of the excavating rig body on the excavating direction side of the excavating rig body. It is a casing part arranged so as to surround the periphery of the.

The excavating apparatus according to Supplementary Note 3 is the excavating apparatus according to Supplementary Note 1, wherein the guide means includes a plurality of first claw portions provided at a peripheral edge of an end portion of the excavating device main body on the excavation direction side, among the plurality of claw portions. It is the nail part.

The excavating apparatus according to Supplementary Note 4 is the excavating apparatus according to Supplementary Note 3, wherein the plurality of claw portions are arranged inside the peripheral edge of the plurality of first claw portions and the end portion of the excavating direction side of the excavating device main body. a plurality of second claws provided on the portion, the plurality of second claws formed to protrude in the excavation direction more than the plurality of first claws.

The drilling rig according to Supplementary Note 5 is the drilling rig according to Supplementary Note 3 or 4, further comprising a centering portion provided at a central portion of an end portion of the drilling device main body on the excavation direction side, wherein the centering portion It is formed so as to protrude in the excavation direction more than the plurality of first claw portions and not protrude in the excavation direction more than the plurality of second claw portions.

A drilling rig according to appendix 6 is the drilling rig according to any one of appendices 3 to 5, wherein the vertical length of the drilling rig body is longer than the diameter of the drilling rig body.

(Effect of Supplementary Note)
According to the drilling rig described in Supplementary Note 1, the plurality of claw portions provided at the end portion of the drilling device body on the drilling direction side, and the guide provided at or near the periphery of the drilling direction end portion of the drilling device body. and the guide means for guiding the excavation direction, so that the excavation direction of the excavator can be guided by the guide means. Therefore, compared with the conventional technology (technology for forming a drilling hole using a pen-tip-shaped drilling bit), it is possible to suppress the occurrence of bending of the drilling hole and to accurately form the drilling hole.

According to the drilling rig described in Supplementary Note 2, the guide means is the casing portion provided near the periphery of the end portion of the drilling rig main body on the drilling direction side, and is arranged so as to surround the periphery of the drilling rig body. Since it is a casing part with a large diameter, it is possible to suppress bending of the borehole regardless of the configuration of the excavator main body, and to increase the degree of freedom in designing the excavator main body.

According to the excavating apparatus described in Supplementary Note 3, the guide means is the plurality of first claws provided on the peripheral edge of the excavating direction side of the excavating apparatus main body, among the plurality of claws. It can be configured relatively simply without using a large-scale tool or the like for suppressing hole bending, and the manufacturability of the excavator can be improved.

According to the excavator described in appendix 4, the plurality of claws includes the plurality of first claws and the plurality of second claws provided inside the peripheral edge of the excavating direction side end of the excavating device body. Since the claw portions are provided with a plurality of second claw portions formed so as to protrude in the excavation direction more than the plurality of first claw portions, the second claw portions are arranged on the surface of the first claw portions. The ground can be excavated more efficiently than when they are formed to be uniform, and the excavation performance of the excavator can be easily improved.

According to the drilling apparatus according to appendix 5, the centering portion is formed so as to protrude in the excavation direction more than the plurality of first claw portions and not protrude in the excavation direction more than the plurality of second claw portions. Therefore, it is possible to center the excavator main body while allowing the first claw portion and the second claw portion to function, and to accurately form the excavation hole.

According to the drilling rig described in appendix 6, since the vertical length of the drilling rig body is longer than the diameter of the drilling rig body, the vertical length of the drilling rig body is made longer than the diameter of the drilling rig body. Compared to the case of shortening, the portion of the outer peripheral surface of the excavating device body that can come into contact with the side wall portion of the excavated hole can be increased, and the occurrence of bending of the excavated hole can be further suppressed.

REFERENCE SIGNS LIST 1 earth drill machine 10 main body 10a wire 11 traveling part 12 swivel part 13 control part 14 boom part 15 frame part 20 rotary drive part 30 connection part 40 drilling device 41 drilling device main body 42 first claw 43 second claw 44 core Projection part 100 Earth drill machine 110 Drilling device 111 Drilling device main body 111a Shaft part 111b Fin part 111c Head part 112 Claw part 113 Casing part 113a First casing part 113b Second casing part DH Drilling hole DS Drilling surface G Ground

Claims (2)

A drilling device for forming a drill hole by drilling the ground along the drilling direction,
a drilling rig body;
a plurality of claw portions provided at an end portion of the drilling device main body on the drilling direction side;
guide means provided at or near an end peripheral edge of the excavating device main body on the excavating direction side, the guide means for guiding the excavating direction;
a centering portion provided at a central portion of an end portion on the excavation direction side of the excavating device main body;
wherein the guide means is a plurality of first claw portions provided on a peripheral edge of an end portion of the drilling device main body on the excavation direction side among the plurality of claw portions;
The plurality of claws are
the plurality of first claws;
A plurality of second claw portions provided inside a peripheral edge portion of the excavating direction side end portion of the excavating device main body, the plurality of second claw portions protruding in the excavating direction more than the plurality of first claw portions. a plurality of second claws formed as;
forming the centering portion so as to protrude in the excavation direction more than the plurality of first claw portions and not protrude in the excavation direction more than the plurality of second claw portions;
drilling rig. The vertical length of the excavator body is longer than the diameter of the excavator body,
A drilling rig according to claim 1 .

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