JP4920352B2 - Drilling rig - Google Patents

Description

  The present invention relates to a drilling device, and more particularly, to a drilling device for forming a pile hole or placing a pile on a horizontal ground or an inclined ground.

Conventionally, when a pile hole for installing a pile on the ground is formed, a self-propelled or transport type drilling machine has been used. Such a drilling machine includes a self-propelled carriage or a transportable substrate, a frame erected on the self-propelled carriage, a drilling machine main body (such as a rotary drive unit or an impact imparting unit) that moves up and down while being guided by the frame, and lifts a drilling drill. And lifting means.
That is, the upper end of the drilling drill lifted by the lifting means is joined to the rising excavator body, and the drilling drill is rotated or blown and drilled to a predetermined depth. It pulled up from the drilling hole, and the steel pipe etc. which became a pile were inserted in this drilling hole.

In addition, the excavation drill is a pipe with a cutter bit installed at the tip (hereinafter referred to as “excavation pipe”), and after drilling, the excavation pipe is left in the ground, that is, the excavation drill is collected and cut. There is a method of omitting the insertion of a steel pipe or the like into the hole.
Furthermore, there is a construction method in which excavation drills are made into an inner pipe and an outer pipe with a cutter bit installed at the tip (same as the so-called “double pipe type”), the inner pipe is collected, and the outer pipe is left in the ground. .

  At this time, since such a drilling machine is heavy, it is difficult to self-propell or transport to a high position on an inclined ground. Therefore, a simple assembling type anchor driving device has been developed (for example, a patent) Reference 1).

JP-A-8-184040 (page 2-3, FIG. 1)

However, each of the excavator and the anchor placing device joins the upper end of the excavation drill or the embedded anchor lifted by the lifting means and the rising excavator main body or the rock drill main body. Therefore, there were the following problems.
(A) If it is attempted to perform the above-mentioned joint so that it cannot be pulled out, it will be necessary for the worker to climb to a high place, so a platform (working platform with a ladder that can be climbed up and down from the ground) is placed at a high position on the frame. This will increase the number of parts and weight of the excavator and anchoring device.
(Ii) In order to eliminate the need for a platform, the joint is made simple such that "the upper end of the excavation drill (or embedded anchor) is simply inserted into the recess of the excavator body (or rock drill body)" In the middle of excavation, it becomes impossible to temporarily lift the excavation drill (or the embedded anchor), and the degree of freedom of excavation is reduced.

  The present invention has been made in order to solve such a problem, and the upper end of the excavation drill (or the embedded anchor) and the excavator main body (or the rock drill main body) are pulled out while the platform is unnecessary. An object of the present invention is to provide a drilling rig that can be impossiblely joined. In the present invention, the excavator is the same as the pile driving device when excavating while the pile body is substantially installed.

(1) The excavator according to the present invention is
A lifting and lowering body that is guided up and down by a support column standing on the ground;
Excavation pipe rotating means that is tiltably installed on the lifting body and to which an excavation pipe for excavating the ground is detachably attached ;
A substrate placed on the ground;
A pair of strut steel pipes detachably installed on the substrate;
A strut connecting member that connects the ends of the pair of strut steel pipes;
A pair of upright steel pipes installed on the substrate and into which rear ends of the pair of column steel pipes are respectively inserted;
The column connecting member is fixed to a tip locking portion for locking to the tip of one column steel pipe of the pair of column steel tubes and the tip of the other column steel tube of the pair of column steel tubes. A tip fixing portion for,
The rear end of the other strut steel pipe, the rear end of which is fixed to the front end of the one strut steel pipe, with the rear end of the one strut steel pipe being inserted into one of the pair of standing steel pipes When the end is inserted into the other standing steel pipe of the pair of standing steel pipes, the tip locking portion is locked to the tip of the one column steel pipe .
(2) Further, in the above (1), there is provided a drilling pipe guide means that guides a drilling pipe that is installed on a support column standing on the ground and is attached to the drilling pipe rotating means.
(3) In the above (1) or (2), the elevating body includes a mounting hole formed in a direction perpendicular to the guided direction,
The excavation pipe rotating means includes an attachment shaft that is rotatable by entering the attachment hole.

(4) In any of (1) to (3), a drill bit is installed at the tip of the drill pipe, and a striking means for applying an axial force to the drill bit is installed. Features.
(5) In any one of (1) to (4), the excavation pipe includes an outer pipe, an inner pipe that can be inserted into the outer pipe, and the outer pipe and the inner pipe. A pipe joining means for joining freely,
The pipe joining means restrains the relative movement of the outer pipe in the axial direction with respect to the inner pipe, and enables relative rotation in the circumferential direction of the outer pipe with respect to the inner pipe.

( 6 ) Further, in any one of (1) to ( 5 ), a winch that is detachably installed on the substrate;
A wire connected to the lift and wound or unwound by the winch;
A sheave that is installed on the column connecting member and guides the wire;
A sheave cover that is detachably installed on the support coupling member and prevents the wire guided by the sheave from being removed, and a rear end of the other support steel pipe of the pair of support steel pipes, Before inserting into the other standing steel pipe of the standing steel pipe, the wire is guided in advance to the sheave of the strut connecting member fixed to the tip of the other strut steel pipe, and The detachment of the wire is prevented by the sheave cover.

Since the excavator according to the present invention is as described above, the following effects can be obtained.
(I) In the excavating apparatus according to the present invention, the excavating pipe rotating means is tiltable with respect to the lifting body. Therefore, for example, the lifting body is lowered so that the tube rotation axis of the excavating pipe rotating means is substantially parallel to the ground. In this state, the excavation pipe is connected to the excavation pipe rotating means so that it cannot be pulled out, and the ascending / descending body is lifted as it is so that the pipe rotation axis of the excavation pipe rotating means is parallel to the column to execute excavation. It becomes possible. Accordingly, since the excavating pipe lifting means and the platform are not required, the apparatus is simplified and reduced in weight, and the joining work can be performed on the ground, so that the work efficiency is improved.
(Ii) In addition, since the excavation pipe guide means for guiding the excavation pipe is installed on the support column, the excavation pipe rotation means can be tilted, the position of the excavation pipe does not move, and the excavation direction changes. There is no.
(Iii) Since the mounting shaft formed in the excavating pipe rotating means enters the mounting hole formed in the elevating body so as to freely rotate, the tilting of the excavating pipe rotating means with respect to the elevating body is performed with a simple structure. Is guaranteed.

(Iv) Also, since the excavation bit installed at the tip of the excavation pipe is hit in the axial direction, the excavation speed particularly in the hard ground is improved, and the excavation efficiency is improved.
(V) The excavation pipe includes an outer pipe and an inner pipe, and the outer pipe is restrained in the axial direction with respect to the inner pipe and is rotatable in the circumferential direction. However, since the outer tube does not rotate, an increase in the load on the excavating tube rotating means is prevented.

(Vi) Further, it has a substrate placed on the ground, a pair of strut steel pipes, a strut connecting member, and a pair of standing steel pipes, and one of the strut steel pipes is erected, The other strut steel pipe can be erected integrally with each other, so that the construction is easy and the weight of the strut when being carried into the construction site can be halved.
(Vii) In addition, it has a substrate placed on the ground, a pair of strut steel pipes, a strut connecting member, and a pair of standing steel pipes. In addition, since the other support steel pipe on which the wire is guided can be erected integrally, the construction is easy and the weight of the support column when being carried into the construction site can be halved.

1 to 4 schematically illustrate an excavation apparatus according to an embodiment of the present invention. FIG. 1 is a side view showing a state in which the excavation apparatus is attached to a support column, and FIG. (A) showing a lifting body) is a side view, (b) is a plan view, (c) is a front view, and FIG. 3 is a part thereof (excavating pipe rotating means). (A) is a side view (plan view) (Same), (b) is a front view, (c) is a back view, and FIG. 4 is a partial perspective view showing the connection between the apparatus members (the lifting body and the excavating pipe rotating means).
In FIG. 1, an excavating apparatus 100 includes an elevating body (hereinafter referred to as “elevating block”) 60 that is detachably attached to a column steel pipe 47, a tilting block 70 that is tiltably attached to the elevating block 60, and a tilting block 70. The excavating pipe rotating means 80 is fixed to the excavating pipe.

The column steel pipe 47 is detachably installed on the column block 40, the column block 40 is detachably installed on the substrate block 30 placed on the ground 2, and the sheave block 50 and the winch block 90 are detachably installed. (Hereinafter, these may be collectively referred to as “device members”). Hereinafter, each device member will be described in detail.
In the following description, the same or corresponding parts are denoted by the same reference numerals, and a part of the description is omitted. In addition, subscripts “a, b” are attached to a plurality of members having similar functions, but when explaining the common contents, the subscripts “a, b” may be omitted. is there.

(Elevating block)
2 and 4, the elevating block 60 includes a pair of elevating plates 62 a and 62 b each having a through hole (hereinafter referred to as “tilting hole”) 61 a and 61 b in the center, and a pair of elevating plates 62 a and 62 b. And guide tubes 63a and 63b fixed along both side edges. The tilting holes 61a and 61b are coaxial, and the tilting shaft 71 installed in the tilting block 70 enters in a freely rotatable manner.
In the figure, the tilt holes 61a and 61b are the inner diameters of the pipe bodies 64a and 64b fixed to the lift plates 62a and 62b, respectively, but the pipe bodies 64a and 64b are omitted and formed directly on the lift plates 62a and 62b. May be. Further, only one lifting plate 62a may be used. Further, when a through hole is formed on the tilting block 70 side instead of the tilting shaft 71, a shaft that slidably enters the through hole is installed on the lifting block 60 side instead of the tilting hole 61. It will be.

The guide tubes 63a and 63b are parallel to each other and are respectively engaged with the support steel tubes 47a and 47b, that is, the support steel tubes 47a and 47b are inserted into the guide tubes 63a and 63b. Each of the guide tubes 63a and 63b has a C-shaped cross section, and openings 65a and 65b are formed in a part of the circumferential direction. Ribs 49a and 49b installed on the outer surfaces of the column steel pipes 47a and 47b are engaged with the openings 65a and 65b to prevent the lifting block 60 from being twisted (this will be described in detail separately). .
In addition, when the ribs 49a and 49b are not installed in the support steel pipes 47a and 47b, the guide pipes 63a and 63b may have a circular cross section without the openings 65a and 65b. In addition, each of the guide tubes 63a and 63b is formed from two short materials arranged in the vertical direction, i.e., without a central portion, but may be one long material, Three or more short materials may be used.

Further, the elevating block 60 is provided with a handle 66 for handling and for facilitating the standing work of the support steel pipe 47. The handle 66 is formed of a pair of protruding tubes 67a and 67b fixed to the elevating plate 62b, and a grip tube 68 and an auxiliary tube 69 that connect the protruding tubes 67a and 67b to each other.
In addition, although the above demonstrated the raising / lowering block guided to a pair of support | pillar steel pipe 47, this invention is not limited to this, The one support | pillar steel pipe 47 may be sufficient. At this time, the guide pipe 63 may be a pipe body through which the support steel pipe 47 passes, or may be a plurality of members that slidably surround the support steel pipe 47. Further, when a support column is formed of a material having a rectangular cross section or a H cross section, and a guide rail in the longitudinal direction is formed on the support column, the guide tube 63 has a shape to be guided by being locked to the guide rail. .

(Tilt block)
3 and 4, the tilting block 70 has a tilting shaft 71 and a tilting plate 74 and is detachably and tiltably attached to the lifting block 60 via the tilting shaft 71, and the excavating pipe rotating means 80 is attached to the tilting plate 74. Is fixed.
The tilt shaft 71 is a cylinder having a drop prevention hole 72 formed at the tip, and is inserted into the tilt hole 61 provided in the lifting block 60. That is, when the anti-drop pin 73 is driven into the anti-drop hole 72 while penetrating through the tilt hole 61, the anti-extraction pin 61 does not come out.

Since the tilting shaft 71 slides in the tilting hole 61, an oil groove may be provided on the outer periphery of the tilting shaft 71, or a bearing may be installed. Moreover, you may form with a steel pipe instead of a cylinder (round bar). Further, when a through shaft is formed on the lifting block 60 side instead of the tilt hole 61, a hole through which the through shaft slidably enters instead of the tilt shaft 71 is installed on the tilt block 70 side. Will be.
The tilting plate 74 is a rectangular plate, and a wire installation hole 75 for connecting the lifting wire 95 is formed. The wire installation hole 75 is formed in a plate material fixed to the tilting plate 74 (see FIG. 3), a ring fixed to the tilting plate 74 (see FIG. 4), or directly drilled in the tilting plate 74. Is.

  A pair of flanges 76 are fixed along both side edges of the tilting plate 74, and an arm mounting plate 77 for mounting a counterweight arm 78 is fixed to the pair of flanges 76. A substantially U-shaped counterweight arm 78 extending in a direction opposite to the excavation pipe connecting portion 81 of the rotating means 80 is installed. Further, a counterweight screw rod 79 extending in the direction opposite to the excavation pipe connecting portion 81 is fixed to the counterweight arm 78.

  Therefore, since the counterweight 89 can be skewered on the counterweight screw rod 79 and fixed with the nut, it is possible to prevent the excavated pipe from being lifted during excavation. Further, when the excavating pipe is installed in the excavating pipe rotating means 80, the tilting block 70 is balanced in weight by the counterweight 89. Therefore, when the lifting block 60 is pulled up, the tip of the excavating pipe (excavation bit is installed). Since the force which presses the ground 2 weakens, it becomes easy to pull up.

(Drilling pipe rotating means)
3 and 4, the excavating pipe rotating means 80 includes an excavating pipe connecting portion 81 to which the excavating pipe 3 is connected, an excavating hydraulic motor 84 that rotationally drives the excavating pipe connecting portion 81, and compressed air to the excavating pipe. And a compressed air receiving portion 86 for receiving.
The excavation pipe connecting portion 81 has a blind hole 81a having a hexagonal cross section, and a drop prevention hole 82 into which the drop prevention pin 83 is driven is formed. When the end 3a of the excavating pipe 3 is not formed in a columnar shape having a hexagonal cross section, for example, in the case of a quadrangular cross section, the concave portion of the excavating pipe connecting portion 81 is also the same as the end shape of the excavating pipe It will be formed in a quadrilateral cross section.

The excavating hydraulic motor 84 is a known type, and a hydraulic joint 85 projects from the outer surface to connect a hydraulic hose (not shown).
The compressed air receiving portion 86 is a cylindrical body that sends compressed air to the rotating excavation pipe connecting portion 81, and a compressed air joint 87 projects from the outer surface to connect a compressed air hose (not shown).
In addition, when it is not necessary to send compressed air to a drilling pipe, ie, when a down-the-hole drill is not installed in a drilling pipe, the compressed air receiving part 86 (and the pneumatic joint 87) are not installed.

(Elevating the lifting block)
FIG. 5 is a schematic front view for explaining the usage state of the excavator according to the embodiment of the present invention. As described above, the elevating block 60 is engaged with the support steel pipe 47 so as to be movable up and down, and the excavating pipe rotating means 80 is tiltably attached to the elevating block 60 via the tilting block 70 (not shown). Therefore, the excavation pipe 3 can be attached so that the excavation pipe rotating means 80 is substantially horizontal in a state where the elevating block 60 is lowered. Since such attachment work can be performed on the ground, lifting means (such as a hoist, a sheave, and a winch) for lifting the excavating pipe 3 alone and a platform for working at high places are not required.

  Further, if the elevating block 60 is lifted with the excavating pipe 3 attached to the excavating pipe rotating means 80, the excavating pipe rotating means 80 gradually tilts, and eventually the excavated pipe 3 becomes parallel to the column steel pipe 47. . Therefore, since excavation can be started as it is, the operation becomes quick. At this time, since the excavation pipe 3 is fixed to the excavation pipe rotating means 80 so as not to be removed by the escape prevention pin 73, excavation can be performed while the excavation pipe 3 is temporarily lifted.

(Assembly-type support)
The above is an example in which the support column erected on the ground is composed of a pair of support steel pipes 47, but the present invention does not limit the type of support column to which the lifting block is attached. The elevating block may be attached to a support (same as the frame) installed on the transporting carriage.
Next, an example in which the excavator 100 is installed on an assembly-type support column formed from a simple and lightweight device member will be described. According to this, the excavator 100 can be easily used even at a high position on an inclined land.

  FIG. 6 is a side view showing a state in which the excavator according to the embodiment of the present invention is attached to the assembly-type support column, and FIG. 7 is a perspective view schematically showing each device member constituting the excavator, ) Is a substrate block, (b) is a support block, (c) is a sheave block, (d) is a lifting block, (e) is a tilting block, (f) is a winch, and (g) is a support material. In addition, the same code | symbol is attached | subjected to the part which is the same as that of FIGS. 1-5, or an equivalent part, and one part description is abbreviate | omitted.

(Board block)
6 and 7, the substrate block 30 connects a frame body 31 whose bottom surface forms a plane, a pair of cross-section L-shaped members 32 installed on the frame body 31, and a pair of cross-section L-shaped members 32. And a reinforcing member 33. A through hole 35 is formed in the frame 31, and when the substrate block 30 is placed on the ground 2, a peg 34 for preventing the movement and lifting of the substrate block 30 enters the through hole 35 and is driven into the ground 2. It is what
Each of the pair of cross-section L-shaped members 32 has the long side 32f facing outward, the side edges of the short side 32w are fixed to the frame 31 and are parallel to each other, and the lower surface of the long side 32f and the upper surface of the frame 31 Thus, a longitudinal outer opening groove 36 (opening outside) whose upper and lower directions are constrained is formed. Further, a through hole 32 a is formed in the long side 32 f, and the outer opening groove 36 and the through hole 32 a are used for installing the column block 40.

(Support block)
6 and 7, the column block 40 is detachably installed on the substrate block 30, and a pair of column steel pipes 47a and 47b and a winch block 90 are detachably installed on the column block 40 itself. Is.
The column block 40 has a column base 41, a long side 42f facing inward, a pair of L-shaped cross-section members 42 whose side edges of the short side 42w are fixed to the lower surface of the column base 41, and a long side 43f facing inward. A side edge of the short side 43 w has a pair of cross-section L-shaped members 43 fixed to the upper surface of the column base 41, and standing steel pipes 45 a and 45 b fixed to the upper surface of the column base 41.

At this time, since the side edges of the long sides 42f of the pair of L-shaped members 42 are parallel to each other, they can enter the outer opening groove 36 of the substrate block 30 in the longitudinal direction, and can be vertically and longitudinally. (Same as the direction perpendicular to the longitudinal direction).
Further, the side edges of the long side 43f of the pair of cross-section L-shaped members 43 are parallel to each other, and the longitudinal inner opening groove 44 (the vertical direction is constrained by the lower surface of the long side 43f and the upper surface of the column base 41 ( (Opened inside). The inner opening groove 44 serves to install the winch block 90.
In addition, since the through hole 41a is formed in the support base 41, if a pin (not shown) that locks both the through hole 41a and the through hole 32a formed in the substrate block 30 is installed, the support block 40 does not move. Alternatively, a through hole through which a peg placed on the ground 2 passes may be provided.

  The standing steel pipes 45a and 45b are respectively provided with ribs 49a and 49b arranged in a letter C shape, with the bottom surfaces fixed to the column base 41 and the side surfaces fixed to the standing steel pipes 45a and 45b. Moreover, the upper part of rib 49a, 49b protrudes from the upper end surface of the steel pipes 45a, 45b for standing. Therefore, when the guide tubes 63a and 63b of the elevating block 60 are placed on the upper end surfaces of the standing steel tubes 45a and 45b, the guide tubes 63a and 63b are held by the ribs 49a and 49b. The position will not shift or drop.

(Sheave block)
7C, the sheave block 50 includes a sheave 51, a sheave shaft 52 that rotatably supports the sheave 51, and a sheave cover 53.
A projection 54 having a conical tip (hereinafter referred to as “tip locking portion”) 54 is fixed to one end portion of the sheave shaft 52, and a tip locking portion 54 is fixed to the other end portion of the sheave shaft 52. A short steel pipe (hereinafter referred to as “tip installation portion”) 55 is fixed in the same direction.
Accordingly, the tip of the other column steel pipe 47b forming the column 47 is inserted into the tip installation part 55, and the installation through hole 56 provided on the side surface of the tip installation part 55 and the installation of the column steel pipe 47b are provided. When the spectacle bolt 96 is passed through both of the through holes 48b and a nut is screwed, the support steel pipe 47b and the sheave block 50 are integrally joined.

Then, if the column steel pipe 47b is inserted into the standing steel pipe 45b along one column steel pipe 47a (inserted into the standing steel pipe 45a) that forms the column 47 already standing, the tip end The stop part 54 will penetrate | invade inside the support | pillar steel pipe 47a. That is, the support steel pipe 47a and the support steel pipe 47b are connected at their respective ends without the operator climbing to a high position.
Further, the upper end of the column reinforcing member 97 is locked to the spectacle bolt 96 in the standing state, and the lower end of the column reinforcing member 97 is placed on the ground 2 and is fixed by a peg (not shown). The column 47 is surely maintained in a standing posture.
Note that a ring in which the upper end of the column reinforcing member 97 can be locked is fixed to each of the pair of column steel pipes 47a and 47b, and the upper end of the column reinforcing member 97 may be locked to the ring.

At this time, the sheave shaft 52 supports the sheave 51 and at the same time functions as a “column connecting member” that connects the column steel pipe 47 a and the column steel pipe 47 b.
Further, a screw rod 57 is fixed to the sheave shaft 52, while a flange 59 having a through hole 58 is fixed to the sheave cover 53, so that a nut (not shown) is inserted into the screw rod 57 that has entered the through hole 58. The sheave cover 53 is installed on the sheave shaft 52 only by screwing.

(winch)
7 (f), the winch block 90 includes a cross-sectional L-shaped member 91 arranged in parallel, a connecting plate 92 that connects the cross-sectional L-shaped member 91, and a lifting hydraulic motor 93 installed on the connecting plate 92. And a winding drum 94 rotated by the lifting hydraulic motor 93 and a lifting wire 95 wound on the winding drum 94. Note that a hydraulic joint for supplying hydraulic pressure to the lifting hydraulic motor 93 is not shown.
Since the pair of cross-section L-shaped members 91 are formed in the support block 40 and enter the inner opening groove 44 and are restrained in the vertical direction and the front-rear direction, the winch block 90 does not come off the support block 40.
The winch block 90 (L-shaped material 91 or connecting plate 92) is formed with a through hole 91a, and a pin that is locked to both the through hole 91a and the through hole 43a formed in the support block 40 is installed. Thus, the movement of the winch block 90 is reliably prevented. Alternatively, a through hole through which a peg driven into the ground 2 may be provided.

(Double bit)
In the above description, the excavation pipe attached to the rotary excavation apparatus is not limited. Next, as another example, a double pipe excavation pipe will be described.
FIG. 8 schematically shows another example of the excavation pipe connected to the excavation apparatus according to the embodiment of the present invention, where (a) is a side view and (b) is a partial perspective view.

In FIG. 8A, an inner bit 10 constituting a double bit 1 (see Japanese Patent Application No. 2003-387181) is installed at the tip of the excavation pipe 3. Further, a top joint 4 is fixed to an outer pipe (hereinafter referred to as “casing”) 5 through which the excavation pipe 3 passes, and the top joint 4 is freely attachable and detachable in a state in which the top joint 4 is rotatable and axially restrained by the ring bit 20. It is connected to.
Therefore, the double bit 1 installed in the excavation pipe transmits the rotational force applied to the inner bit 10 and the striking force in the axial direction to the ring bit 20. On the other hand, the movement of the inner bit 10 in the axial direction is transmitted to the casing 5, but the rotation of the inner bit 10 is not transmitted to the casing 5. Further, by reversing the inner bit 10, the connection between the inner bit 10 and the ring bit 20 is released.

8B, at the rear end of the excavation pipe 3, a hexagonal cross-section connecting portion 3a that enters the excavation pipe connection portion 81 of the excavation pipe rotating means 80, and the omission prevention that has been driven into the omission prevention hole 82. A retaining prevention groove 3b for locking the pin 83 is formed, and a scattering prevention rod 3c for preventing scattering of excavated soil blown up during excavation is installed.
A known down-the-hole drill (not shown) is installed near the tip of the excavation pipe 3, and compressed air is supplied through the inside 3d of the excavation pipe 3. Therefore, the excavated soil is blown up by the air discharged from the down-the-hole drill, and is recovered to the ground through the gap between the excavated pipe 3 and the casing 5.

Therefore, the top joint 4 to which the casing 5 is fixed and the ring bit 20 are connected, and the excavation pipe 3 having the inner bit 10 fixed to the tip is inserted into the casing 5 in such a state, and both are connected. Then, the excavation pipe 3 is attached to the excavation pipe rotation means 80 on the ground, the lifting block 60 is raised to raise the excavation pipe 3, and the excavation pipe rotation means 80 rotates the excavation pipe to excavate.
At this time, according to excavation, the casing 5 (not rotating) follows the excavation pipe 3 and is drawn into the ground. And after excavation of a predetermined depth is completed, the connection between the inner bit 10 and the ring bit 20 is released, and the excavation pipe 3 to which the inner bit 10 is fixed is recovered to the ground.

(Assembly method of assembly-type support)
FIG. 9 supplements the explanation of the method of using the excavator according to the embodiment of the present invention, (a) is a partial side view schematically showing the intermediate step, and (b) is a partial perspective view schematically showing the intermediate step. (C) is a fragmentary perspective view showing an intermediate process typically.
Hereinafter, the case where the double bit 1 is installed in the front-end | tip of the excavation pipe 3, and the casing 5 is left in the ground about an assembly-type support | pillar (refer FIG. 6 and FIG. 7) is demonstrated. In addition, although each process (step) is described as "S" and in order to clarify the distinction between apparatus members, it is shaded for convenience, but does not necessarily indicate a cross section. Moreover, description of some apparatus members (such as a hydraulic hose and a pneumatic hose) is omitted.

<Board block installation process>
(S1) The substrate block 30 is placed at a position where the outer tube 5 is to be installed, and the peg 34 is driven into the ground.
(S2) The long sides 42f of the pair of cross-sectional L-shaped members 42 of the support block 40 are inserted into the outer opening groove 36 of the substrate block 30, and pins that are locked to both the through holes 41a and the through holes 32a are installed.
(S3) The L-shaped material 91 of the winch block 90 is inserted into the inner opening groove 44 of the support block 40, and pins that are locked to both the through hole 43a and the through hole 91a are installed. That is, the winch block 90 is detachably installed on the substrate block 30 via the support block 40.
(S4) The raising / lowering block 60 is arrange | positioned at the upper end surface of a pair of standing-up steel pipes 45a and 45b. At this time, since the guide tubes 63a and 63b of the elevating block 60 are held by the ribs 49a and 49b, they do not move or fall (see FIG. 9A).

<Sheave block installation process>
(S5) The sheave block 50 (same as the column connecting member) is installed at the tip of the other column steel tube 47b of the pair of column steel tubes 47. That is, the tip of the support steel pipe 47b is inserted into the tip installation portion 55 of the sheave block 50, and the spectacle bolt 96 is inserted into the installation through hole 56 and the installation through hole 48b, and the nut is screwed.
(S6) The elevating wire 95 is engaged with the sheave 51, and the sheave cover 53 is installed. That is, the sheave cover 53 is arranged so as to cover the lifting wire 95, and a nut is screwed onto the screw rod 57 (through the through hole 58 of the sheave cover 53) fixed to the sheave shaft 52 ( (See (b) of FIG. 9).

<Stand standing process>
(S7) The raising / lowering block 60 is arrange | positioned between a pair of standing-up steel pipes 45a and 45b. At this time, an arrangement arm (not shown) installed on the elevating block 60 is locked to the winding drum 94 of the winch block 90.
(S8) One strut steel pipe 47a of the pair of strut steel pipes 47 is inserted and erected in the standing steel pipe 45a. At this time, the support steel pipe 47a penetrates the guide pipe 63a of the elevating block 60.
(S9) The other strut steel pipe 47b of the pair of strut steel pipes 47 is inserted into the standing steel pipe 45b to stand. At this time, the support steel pipe 47 b penetrates the guide pipe 63 b of the lifting block 60. And since the sheave block 50 is installed in the front-end | tip of the other support | pillar steel pipe 47b, the front-end | tip latching | locking part 54 of the sheave block 50 penetrate | invades in one support | pillar steel pipe 47a, and support | pillar steel pipe 47a, 47b is connected. (See FIG. 9B).
(S10) The upper end of the column reinforcing member 97 is locked to the spectacle bolt 96 of the column steel pipe 47b, and the lower end is placed on the ground 2 and fixed.

<Drilling pipe connection process>
(S11) The tilting block 70 is tiltably installed on the lifting block 60. In other words, the tilting shaft 71 of the tilting block 70 is inserted into the tilting hole 61 of the lifting block 60, and the slipping prevention pin 73 is driven into the slipping prevention hole 72 in a state of passing through the lifting plate 62. At this time, the tilting block 70 is made to be substantially horizontal. And the wire 95 for raising / lowering is connected to the ring for wire installation of the tilting plate 74 (installed via a sickle).
(S12) The excavation pipe 3 and the outer pipe 5 are integrated. That is, with the top joint 4 welded to the outer pipe 5 and the ring bit 20 welded to the top joint 4, the excavating pipe 3 to which the inner bit 10 is connected is inserted into the outer pipe 5, The ring bit 20 and the inner bit 10 are coupled.
(S13) The excavation pipe 3 is connected to the excavation pipe rotating means 80. That is, the connecting portion 3a of the excavation pipe 3 is inserted into the excavation pipe connection portion 81, and the removal prevention pin 83 is driven into the removal prevention hole 82 (see FIG. 4).

<Drilling pipe standing process>
(S14) Each of the hydraulic hose and the pneumatic hose is connected.
(S15) By lifting up the lifting wire 95, the tilting block 70 (the lifting block 60 and the excavating pipe rotating means 80 are integrated) is pulled up. At this time, the excavation pipe 3 (which is the same for the outer pipe 5) that was substantially horizontal at the beginning is raised at the rear end, and gradually rises, and eventually becomes parallel to the column 47 (for example, becomes vertical, 5).
(S16) The outer tube 5 is guided to be raised and lowered at the position of the support block 40. That is, the lower end portion of the outer tube 5 is disposed in the guide tube 5 a installed in the support block 40. At this time, since the guide tube 5a is formed of a half-arc-shaped arc member whose one end is hinge-connected, the guide tube 5a is easily arranged. In addition, when the guide pipe 5a is formed from an integral steel pipe, the lower end portion of the outer pipe 5 is inserted into the steel pipe (see FIG. 9C).

<Drilling process>
(S17) The elevating wire 95 is rewound to bring the double bit 1 into contact with the ground surface 2.
(S18) The excavation pipe 3 is rotated and a blow is applied to the tip. That is, hydraulic pressure is supplied to the excavating pipe rotating means 80 and compressed air is supplied to the compressed air receiving portion 86.
(S19) When excavation of a predetermined depth is completed, the excavation pipe 3 is stopped from rotating and hitting.

<Drilling pipe collection process>
(S20) The excavation pipe 3 is rotated in the direction opposite to that during excavation, and the inner bit 10 and the ring bit 20 are separated.
(S21) The hoisting pipe 3 (with the inner bit 10 installed) is collected on the ground by winding up the lifting wire 95. At this time, since the outer pipe 5 is left in the excavation hole, the outer pipe 5 is buried along with the excavation process.

The above shows the case where the outer pipe 5 is buried simultaneously with excavation using the double bit 1, but the present invention is not limited to this, and the case where the double bit 1 is not used, that is, the outer It may be a case where a hole is drilled in a state where there is no pipe, and then an outer pipe is inserted into the hole. At this time, the guide pipe 5a guides the excavation pipe 3 directly.
Further, the steps (S1 to S20) are not limited to those executed in numerical order, and the order of execution may vary within the scope of the present invention. For example, the installation of the winch block 90 and the integration of the excavation pipe 3 and the outer pipe 5 may be performed in parallel with the column erecting process.

  According to the present invention, since the excavation pipe can be attached to the rotary excavation means on the ground, the work can be performed quickly, and the number of members constituting the apparatus can be reduced or the weight of the member can be reduced. Therefore, it can be widely used as various excavating devices (including pile driving devices).

The side view which shows the state attached to the support | pillar which illustrates the excavation apparatus which concerns on embodiment of this invention typically. 1 shows a part (elevating body) of the excavator shown in FIG. 1, (a) is a side view, (b) is a plan view, and (c) is a front view. 1 shows a part of the excavator shown in FIG. 1 (excavation pipe rotating means), (a) is a side view (same as a plan view), (b) is a front view, and (c) is a back view. FIG. 2 is a partial perspective view showing how the members of the excavator shown in FIG. 1 (elevating body and excavating pipe rotating means) are engaged. The schematic diagram of the front view explaining the use condition of the excavator shown in FIG. The side view which shows the state in which the excavator shown in FIG. 1 was attached to the assembly-type support | pillar. It is a perspective view which shows typically each apparatus member which comprises the excavation apparatus shown in FIG. 6, (a) is a board | substrate block, (b) is a support | pillar block, (c) is a sheave block, (d) is a raising / lowering block. , (E) is a tilting block, (f) is a winch, (g) is a strut reinforcement. The other Example of the excavation pipe connected to the excavation apparatus shown in FIG. 6 is shown typically, (a) is a side view, (b) is a partial perspective view. 6 supplements the explanation of the method of using the excavator shown in FIG. 6, (a) is a partial side view schematically showing the intermediate step, (b) is a partial perspective view schematically showing the intermediate step, and (c) is in the middle. The fragmentary perspective view which shows a process typically.

Explanation of symbols

1 Double bit 2 Ground 3 Drilling pipe 4 Top joint 5 Casing (outer pipe)
DESCRIPTION OF SYMBOLS 10 Inner bit 20 Ring bit 30 Substrate block 40 Column block 41 Column base 45 Standing steel pipe 47 Column steel pipe 50 Sheave block 51 Sheave 53 Sheave cover 60 Lift block 61 Tilt hole 62 Lift plate 63 Guide tube 70 Tilt block 71 Tilt shaft 72 Removal prevention hole 73 Removal prevention pin 74 Tilting plate 75 Wire installation hole 76 Flange 78 Counterweight arm 79 Counterweight screw rod 80 Drilling pipe rotating means 81 Drilling pipe connection part 82 Removal prevention hole 83 83 Removal prevention pin 84 For drilling Hydraulic motor 89 Counterweight 90 Winch block 93 Lifting hydraulic motor 94 Drum 95 Lifting wire 100 Excavator

Claims (6)

A lifting and lowering body that is guided up and down by a support column standing on the ground;
Excavation pipe rotating means that is tiltably installed on the lifting body and to which an excavation pipe for excavating the ground is detachably attached ;
A substrate placed on the ground;
A pair of strut steel pipes detachably installed on the substrate;
A strut connecting member that connects the ends of the pair of strut steel pipes;
A pair of upright steel pipes installed on the substrate and into which rear ends of the pair of column steel pipes are respectively inserted;
The column connecting member is fixed to a tip locking portion for locking to the tip of one column steel pipe of the pair of column steel tubes and the tip of the other column steel tube of the pair of column steel tubes. A tip fixing portion for,
The rear end of the other strut steel pipe, the rear end of which is fixed to the front end of the one strut steel pipe, with the rear end of the one strut steel pipe being inserted into one of the pair of standing steel pipes The excavator according to claim 1, wherein when the end is inserted into the other standing steel pipe of the pair of standing steel pipes, the tip locking portion is locked to the tip of the one column steel pipe .   The excavation apparatus according to claim 1, further comprising excavation pipe guide means that is installed on a support column standing on the ground and guides the excavation pipe attached to the excavation pipe rotation means. The elevating body comprises a mounting hole formed in a direction perpendicular to the guided direction;
The excavation apparatus according to claim 1 or 2, wherein the excavation pipe rotating means includes an attachment shaft that enters the attachment hole and is rotatable.   The excavation apparatus according to any one of claims 1 to 3, wherein an excavation bit is installed at a tip of the excavation pipe, and striking means for applying an axial force to the excavation bit is installed. The excavation pipe comprises an outer pipe, an inner pipe that can be inserted into the outer pipe, and pipe joining means for detachably joining the outer pipe and the inner pipe,
The pipe joining means restrains the relative movement of the outer pipe in the axial direction with respect to the inner pipe, and enables relative rotation in the circumferential direction of the outer pipe with respect to the inner pipe. 4. The excavator according to any one of 4 above. A winch that is detachably mounted on the substrate;
A wire connected to the lift and wound or unwound by the winch;
A sheave that is installed on the column connecting member and guides the wire;
A sheave cover that is detachably installed on the support coupling member and prevents the wire guided by the sheave from being removed, and a rear end of the other support steel pipe of the pair of support steel pipes, Before inserting into the other standing steel pipe of the standing steel pipe, the wire is guided in advance to the sheave of the strut connecting member fixed to the tip of the other strut steel pipe, and 6. The excavator according to any one of claims 1 to 5, wherein detachment of the wire is prevented by the sheave cover.

Images