JP2004270304A - Earth auger excavator and boring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earth auger excavator and a boring method improving workability by adjusting a longitudinal and lateral inclination even in a location with the inclined ground while enhancing the accuracy of piling and facilitating construction in a location with a height limit. <P>SOLUTION: In this earth auger excavator, a leader 4 is installed through a tilting base 9 supported on a truck 3 tiltably in a lateral direction with a rotation support pin 8 as a fulcrum and set adjustably in the lateral inclination by a cylinder 11 for lateral inclination, and comprises an inclination fixing means 12 for locking the lateral inclination. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drilling method and apparatus using an earth auger excavator for drilling a vertical hole in order to bury a pile in the ground, and in particular, works such as pile driving in a low place such as under a bridge or a narrow place. And a ground auger excavator for implementing the method.
[0002]
[Prior art]
As a conventional earth auger excavator, the one shown in FIG. 1 is known. As shown in FIG. 1, in this conventional earth auger excavator, a leader 33 composed of a set of two masts and a vertically movable up and down along a guide 38 of the leader are held on a carriage 33 having traveling means. An auger motor 36 is provided, and a road surface is drilled by an auger screw 35 attached downward from the auger motor. The auger motor 36 held by the guide 38 is moved up and down by moving the sheave 32 up and down by the elevating cylinder 31 installed between the readers 37. A wire rope 34 is hung on the sheave 32, and one end of the rope is connected to a fixed portion 34 a fixedly adjustable, and the other end is connected to a bracket 34 b projecting from the auger motor 36. When the sheave 32 moves downward by the operation of the lifting cylinder 31, the wire rope 34 is loosened, so that the auger motor 36 descends along the guide 38. Conversely, when the sheave 32 moves upward, the auger motor 36 pulls up the wire rope 34. Rises. In addition, the rear portion of the leader 37 is vertically supported by the stay cylinder 39, and the leader cylinder is inclined forward or rearward about the base axis at the lower end of the leader by the extension / contraction operation of the stay cylinder.
[0003]
[Problems to be solved by the invention]
By the way, in such a conventional earth auger excavator, even in a place where the ground is inclined, since it is necessary to always set the auger screw vertically and accurately drill a vertical hole in the vertical direction, for example, When the ground is inclined left or right, it is necessary to correct the upright posture of the entire excavator by driving a wedge or the like into the right or left side of the fuselage. However, the work of straightening the entire excavator using wedges or the like requires advanced skills and a lot of labor by skilled workers, which not only impairs workability but also poses a serious problem in terms of security, such as danger. Was. In addition, since the height of the leader is a problem at construction sites where the height is limited, a compact and high performance earth auger excavator has been long-awaited.
[0004]
The object of the present invention is to improve the workability, improve the accuracy of piles, and perform construction in places with height restrictions, even if the ground to be drilled is on a slope, such as a sloped place. It is an object of the present invention to provide an earth auger excavator and a drilling method capable of easily performing drilling.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an earth auger excavator according to the present invention comprises a pair of two readers 4 erected at predetermined intervals on a bogie 3 having traveling means, and The auger motor 6 is supported so as to be able to move up and down along a guide 10. The reader 4 is set to be moved back and forth by a slide cylinder 2, and the tilt of the leader 4 is adjustable by a stay cylinder 7. In the earth auger excavator in which the auger screw 5 is attached downward and a vertical hole is drilled in the ground by the auger screw, the leader 4 can be tilted left and right on the bogie 3 with the rotation support pin 8 as a fulcrum. It is installed via a tilting table 9 supported by the robot, and is set to be adjustable by a left-right tilting cylinder 11. And characterized by being deployed inclination fixing means 12 for click.
[0006]
According to the earth auger excavator of the present invention, the front and rear inclination is adjusted by the stay cylinder in accordance with the inclination angle of the ground, and the inclination table is tilted to the left by the inclination cylinder to adjust the inclination of the front and rear and left and right. The vertical vertical hole can be easily and reliably drilled by correctly standing upright on any inclined land.
[0007]
The excavator according to the present invention further comprises a pair of left and right chain sprockets 14 vertically moved up and down by a lifting cylinder 13 provided on the leader 4 between the leader 4 and one end of the chain sprocket connected to the auger motor 6 and the other end connected to the leader 4. The roller link chain 16 is stretched so as to be connected to a part of the fixed portion 15 of the roller.
[0008]
With such a configuration, a limited space can be effectively used by a strong and compact roller chain, and simplification can be achieved mechanically.
[0009]
Further, according to the drilling method of the present invention, in a drilling method using an earth auger excavator, at least two sets of screw heads are used, and the screw head is moved to a first drilling position and the first drilling position. When the excavator is installed at the first or second drilling position at a predetermined distance from the second drilling position, the leader 4 is tilted forward and backward by the stay cylinder 7, and the right and left tilting cylinder 11 is used. Adjust the horizontal tilt simultaneously or separately. A second drilling can be performed.
[0010]
【Example】
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[0011]
2 to 5 show an earth auger excavator according to the present invention as an example. FIG. 2 is a side view of the entire apparatus, FIG. 3 is a front view thereof, and FIG. .
[0012]
As shown in FIGS. 2 and 3, the bogie 3 is mounted on a rail 1 laid on the ground G along a construction site via wheels 17, and is moved on the rail by a series of traveling means including a traveling motor M. Travel forward or backward. The earth auger excavator A is assembled on such a bogie 3. The bogie 3 includes front and rear bogies 3A. 3B can be connected and separated from each other. When forming a connecting wall that contacts an adjacent structure, the rear bogie 3B is cut off and constructed. A set of two readers 4 is erected on a carriage 3 at predetermined intervals so that the leaders 4 can be moved back and forth by a slide cylinder 2 and the front and rear inclinations can be adjusted by a stay cylinder 7. The rear is supported. The reader 4 can also adjust the left and right inclinations by an inclination cylinder 11 via an inclination table 9 supported on the carriage 3 so as to be inclined in the left and right direction with a rotation support pin 8 as a fulcrum. . A chain sprocket 14 is provided between the leaders 4 and is moved up and down by an elevating cylinder 13 provided on the leader. The sprocket 14 is hung by a roller link chain 16 having one end 16A connected to the auger motor 6. Is connected to a fixed portion 15 of the reader 4.
[0013]
The auger motor 6 is supported so as to move up and down by being guided by a guide 10 provided at the front portion of the reader 4 over substantially the entire vertical length thereof. The auger motor 6 is lifted up and down by being pulled by 16.
[0014]
The sprocket 14 is formed by using two double wheels and supporting the sprocket seat 20 on the sprocket seat 20, and fitting the sprocket seat 20 to the upper end of the rod 21 of the elevating cylinder 13.
[0015]
The tilt base 9 is provided with tilt fixing means 12 for fixing and locking the state of the tilt when the tilt of the right and left is adjusted by the tilt cylinder 11. The fixing means 12 is formed by screwing an adjusting nut 12B and a lock nut 12C onto a screw shaft 12A, and locks the tilting base 9 immovably with respect to the bogie 3 in a right or left tilting or horizontal position. is there.
[0016]
The trolley 3 is provided with a counterweight 22 and a hydraulic unit 23, and the trolley 3A is provided with a hydraulic operation panel 24.
[0017]
The auger motor 6 has a plurality of sets of screw heads 5A. 5B. 5C is provided, and the August Cruz 5 is attached to each required one and used for excavation work.
[0018]
In the above-mentioned earth auger excavator A, the traveling motor M is operated to move the carriage 3 sideways so as to face the drilling position, and the slide cylinder 2 moves the leader 4 back and forth to operate the stage cylinder 7. At the same time as adjusting the inclination of the leader 4 before and after, the tilt cylinder 11 is further operated to adjust the inclination of the leader 4 in the left-right direction. They can be set vertically together. Further, the sprocket seat 20 is moved up and down by the operation of the lifting cylinder 13 of the auger motor 6, and the auger screw 5 is rotated at a low speed by driving the auger motor 6 while gradually lowering the auger motor 6 by the roller chain 16. A vertical hole is drilled in the ground. In addition, even when the ground is inclined to the front, rear, left and right, etc. by performing excavation with the auger screw while performing the augmentation of the auger screw 5, the auger screw is vertically added to excavate a vertical hole having a desired depth accurately. be able to.
[0019]
【The invention's effect】
Since the present invention is configured as described in claim 1, it is possible to easily cope with a change in the ground to be excavated by tilting the tilting base to the right or left by operating the tilting cylinder. Conventionally, it is possible to quickly and easily install a part of the bogie against the lateral inclination without the need for complicated work such as adjustment work by jacking up a part of the bogie or interposing a wedge. .
[0020]
Further, since the present invention is configured as described in claim 2, the lifting and lowering operation of the lifting and lowering cylinder of the auger motor is performed by the roller chain and the chain sprocket that guides the roller chain over the roller chain. Therefore, it is possible to effectively use the limited space.
[0021]
Further, since the present invention comprises the method according to claim 3, the screw head is moved to the first position using the earth auger excavator. When setting and installing at the second drilling position, the leader can be easily and quickly responded to the front and back and left and right inclined ground by adjusting the front and rear inclination by the stay cylinder and the left and right inclination of the inclined cylinder. Can be made more efficient.
[Brief description of the drawings]
FIG. 1 is a side view of a conventional earth auger excavator.
FIG. 2 is a side view of the earth auger excavator showing the embodiment of the present invention.
FIG. 3 is a plan view of the same as above.
FIG. 4 is a diagram schematically showing an embodiment of a tilt table.
5A and 5B are operation diagrams of the tilting table, wherein FIG. 5A shows a left tilt, FIG. 5B shows a horizontal state, and FIG. 5C shows a right tilt state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rail 2 Slide cylinder 3 Cart 4 Leader 5 August screw 6 Rotation support pin 7 Stay cylinder 8 Support pin 9 Inclined table 10 Guide 11 Incline cylinder 12 Fixing means 13 Lifting cylinder 14 Sprocket 15 Fixing part 16 Chain 17 Wheel

Claims (3)

A pair of two readers (4) erected at a predetermined interval on a trolley (3) provided with running means, and supported vertically up and down along a guide (10) of the reader. An auger motor (6) is provided, and the reader (4) is set to be movable back and forth by a slide cylinder (2) and adjustable in forward and backward tilt by a stay cylinder (7). In an earth auger excavator in which an auger screw (5) is mounted on a ground and a vertical hole is drilled in the ground by the auger screw, the leader (4) supports a rotary support pin (8) on a bogie (3). It is installed via an inclined table (9) supported to be tiltable in the left and right directions, and is set so that the right and left tilt can be adjusted by a left and right tilt cylinder (11), and the right and left tilt is locked. Earth auger excavator characterized by comprising deploying an inclined fastening means (12) that. A pair of left and right chain sprockets (14) is provided between the leader (4) and vertically moved up and down by an elevating cylinder (13) provided on the leader. One end of the chain sprocket is connected to the auger motor (6) and the other end is connected to the leader. The earth auger excavator according to claim 1, wherein a roller link chain (16) is stretched so as to be connected to a part of the fixing portion (15) of (4). In a drilling method using an earth auger excavator, at least two sets of screw heads are used, and the screw head is placed in a first drilling position and a second drilling hole separated by a predetermined distance from the first drilling position. When the excavator is installed at the first or second drilling position, the leader (4) is tilted forward and backward by the stay cylinder (7), and the tilt in the left and right direction is tilted by the left-right tilt cylinder (11). Adjust at the same time or separately. A drilling method comprising performing a second drilling.

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