Obstacle removing machine

Abstract

To provide an obstacle removing machine having an auger lifting device attachable to and detachable from an auger.SOLUTION: An obstacle remover 1 has a normal mode in which an auger 3, which is a rotary drive device that can be lifted and lowered along a leader 13 of a pile driver 2, is lifted and lowered by a lifting and lowering cylinder 24 provided on the leader 13, and a strengthening mode in which the auger 3 is lifted and lowered by a thrust jack 53 of a lifting and lowering device 5 for the auger by attaching the lifting and lowering device 5 for the auger that is attachable to and detachable from a lower side of the auger 3. 26,27, For example, the auger lifting device 5 includes a docking frame 51 fixed to the base frame 41 of the auger 3, a lower frame 52 including a horizontal jack 54 disposed on the lower side of the docking frame 51, and a thrust jack 53 connecting the docking frame 51 and the lower frame 52.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an obstacle remover equipped with an auger lifting device that is detachable from an auger, which is a rotation output device. [Background technology]

[0002] When rebuilding buildings due to urban redevelopment, etc., the foundations of demolished buildings become obstacles, so it is necessary to remove the concrete and other materials that remain underground. One method for removing such obstacles involves, for example, rotating and forcing a casing with a carbide bit at its bottom into concrete and other materials. This removal method involves forcing the casing into the ground while rotating it, thereby crushing or cutting the underground obstacle, and then pulling out the casing to remove it. This removal method uses a tubing device, as described in Patent Document 1 below, as well as an obstacle removal machine, as described in Patent Document 2 below, which is a pile driver equipped with an auger, which is a rotation output device, as a device for forcing the casing into the ground while rotating it.

[0003] The tubing device grips the casing, which is a steel pipe pile, with a chuck means, and while rotating it with the rotary drive of a hydraulic motor, the casing is pushed in or pulled out by extending and retracting a thrust jack. On the other hand, the obstacle removal machine has an auger, which is a rotary drive device, attached to the leader of the pile driver so that it can be raised and lowered, and the auger rotates the casing gripped by the chuck, just like the tubing device. When pushing the casing in, the auger is lowered by a lifting cylinder, imparting rotation to the casing, and when pulling it out, the auger, which rotates the casing in the reverse direction, is raised by the lifting cylinder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-054773 Summary of the Invention [Problem to be solved by the invention]

[0005] Obstacle removal work requires repeated repositioning of the casing depending on the removal range. Therefore, while tubing equipment can output a large pulling force, the task of moving it to a different location requires time and effort. On the other hand, obstacle removal machines are efficient because the pile driver's traveling device allows the auger to move freely. However, the casing removal force of the lifting cylinder of the obstacle removal machine is weak, and when the casing is pushed deep into the ground, resistance becomes too great and it may become impossible to remove. Therefore, obstacle removal machines are required to increase their pulling force while maintaining the freedom of movement that comes from being mounted on a pile driver.

[0006] SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide an obstacle remover equipped with an auger lifting device that can be attached to and detached from the auger. [Means for solving the problem]

[0007] The obstacle removal machine of the present invention has a normal mode in which the auger, which is a rotary drive device that can be raised and lowered along the leader of the pile driver, is raised and lowered by a lifting cylinder provided on the leader, and an enhanced mode in which a detachable auger lifting device is attached to the underside of the auger and raised and lowered by a thrust jack of the auger lifting device, and in the enhanced mode, hydraulic pressure is released and controlled for the lifting cylinder used in the normal mode and the oscillating cylinder that adjusts the inclination of the leader. [Effects of the Invention]

[0008] According to the above configuration, the auger lifting device can be attached from below to the auger, which is a rotary drive device that can rise and fall along the leader of the pile driver, and when the auger is raised and lowered using the lifting cylinder provided on the leader, work is performed in normal mode, and when the auger is raised and lowered using a thrust jack with the auger lifting device attached, work is performed in enhanced mode, and in this enhanced mode, hydraulic pressure is released and controlled for the lifting cylinder used in normal mode and the swinging cylinder that adjusts the inclination of the leader. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing an obstacle remover to which an auger lifting device is attached. [Figure 2] FIG. 1 is a side view showing an obstacle remover with an auger attached. [Figure 3] FIG. 10 is a side view of the auger with the auger lifting device attached thereto. [Figure 4] FIG. 2 is a plan view of the auger with the auger lifting device attached thereto. [Figure 5] FIG. 2 is a front view of the auger lifting device, with the left half showing the thrust jack in a contracted state and the right half showing the thrust jack in an extended state. [Figure 6] FIG. 10 is a diagram showing a normal mode of the hydraulic circuit for the lifting cylinder and the jack cylinder. [Figure 7] FIG. 10 is a diagram showing a reinforced mode for the hydraulic circuits of the lifting cylinder and the jack cylinder. [Figure 8] FIG. 2 is a diagram showing hydraulic circuits related to a front-rear swing cylinder and a left-right swing cylinder. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of an obstacle remover according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an obstacle remover to which an auger lifting device is attached. The auger lifting device 5 of this embodiment is attached to the auger 3 as needed for the obstacle remover 1, which normally performs work using only the auger, which is a rotation output device. FIG. 2 is a side view showing the obstacle remover 1 with only the auger 3 attached. First, the obstacle remover 1 in the normal state shown in FIG. 2 will be described with reference to FIG. 1 as well.

[0011] The obstacle remover 1 has an auger 3 attached to a leader 13 of a pile driver 2. The pile driver 2 is composed of a base machine in which an upper rotating body 12 equipped with a driver's cab 15 is rotatably mounted on a lower traveling body 11 that can travel on crawlers. In the pile driver 2, a short leader 13 is attached to the center of the tip of the upper rotating body 12 that constitutes the base machine. A leader support 21 is provided at the center of the tip of the upper rotating body 12, and the leader 13 is attached to the leader support 21 so that it can swing. A swing crank 25 is formed at the top of the leader 13 so as to protrude rearward, and is journaled on a support pin 31 that is parallel to the width direction of the machine body at the front side of the leader support 21.

[0012] A longitudinal swing cylinder 26 is axially attached to the rear side of the leader support 21 by a connecting pin 32 that is parallel to the width direction of the machine body. The longitudinal swing cylinder 26 has an end of a cylinder tube axially attached to the leader support 21, while the tip of the piston rod is axially attached to the swing crank 25 by an action pin 33. The lower side of the leader support 21 is pivotally supported by a support shaft in the longitudinal direction relative to the upper rotating body 12, and the upper side on which the swing crank 25 and longitudinal swing cylinder 26 are pivotally supported can swing in the left and right direction. A left and right swing cylinder 27 is axially attached between the leader support 21 and the upper rotating body 12.

[0013] Next, the auger 3 is a working device for rotating the gripped casing K. The auger 3 is made up of a base frame 41 and a chuck frame 42 assembled vertically, and a work table 43 surrounded by a fence is attached to the top of the chuck frame 42. Both frames have through holes 40 formed therein through which the casing K can pass. Two hydraulic motors 45 that rotate the casing K are fixed to the base frame 41, and the rotational output is transmitted to a cone, which is a cylindrical gear member that passes through the casing K.

[0014] In the chuck frame 42, wedge-shaped chucks 44 (see FIG. 4) that fit between the cone and the casing are attached to a rotatable, annular rotor. Chuck cylinders 46 are provided at four locations on the base frame 41, and the chuck frame 42 is connected to the chuck frame 42 by the chuck cylinders 46. Therefore, as the chuck cylinders 46 extend and retract, the chuck frame 42 moves up and down relative to the base frame 41, and as the chuck cylinders 46 move down, the multiple chucks 44 are tightly inserted between the casing K and the cone to grip the casing K, and the driving force of the hydraulic motor 45 is transmitted via the cone to rotate the casing K.

[0015] The auger 3 has a guide block 47 fixed to the base frame 41, and the guide block 47 is attached so as to be slidable relative to the rail section 23 of the leader 13. A lifting cylinder 24 is disposed in the leader 13 between the rail sections 23, with the piston rod facing downward. The lifting cylinder 24, which is a hydraulic cylinder, has the tip of the piston rod pivotally attached to the lower end of the leader 13 and the cylinder tube pivotally attached to the base frame 41. Therefore, when the lifting cylinder 24 contracts, the auger 3 descends as shown in Figures 1 and 2, and when it extends, it ascends.

[0016] The obstacle remover 1 of this embodiment is provided with an auger lifting device 5 shown in Fig. 1 to increase the pulling force of the casing K. The auger lifting device 5 is configured to be detachably attached to the underside of the auger 3 shown in Fig. 2. Figs. 3 and 4 are a side view and a plan view of the auger lifting device 5 attached to the auger 3. Fig. 5 is a front view of the auger lifting device 5, with the left half showing the thrust jack in a contracted state and the right half showing the thrust jack in an extended state.

[0017] The auger lifting device 5 comprises a docking frame 51 and a lower frame 52 arranged one above the other and connected by four thrust jacks 53 located at the four corners. Similar to the auger 3, the docking frame 51 and the lower frame 52 are formed with through holes through which the casing K can pass. The thrust jack 53 has a cylindrical cover body 65 with a closed top fixed to the docking frame 51, within which an inner cylindrical body 66 fixed to the lower frame 52 is slidably fitted from below.

[0018] The thrust jack 53 has a built-in jack cylinder 67, which is a hydraulic cylinder. The jack cylinder 67 has a cylinder tube fixed to the docking frame 51 via a cover body 65, and the tip of the downward-facing piston rod is journaled to the lower frame 52. The thrust jack 53 has a cover body 65 that protrudes upward from the docking frame 51 to ensure a stroke. Therefore, the base frame 41 and chuck frame 42 of the auger 3, which are stacked vertically, are formed in a shape that avoids interference with the cover body 65. Four horizontal jacks 54, which are hydraulic cylinders, are provided near the thrust jack 53 on the lower frame 52 of the auger lifting device 5.

[0019] In the auger lifting device 5, the docking frame 51 is provided with a fixing structure that allows it to be integrated with the base frame 41 of the auger 3 to stabilize the extraction by the thrust jack 53. The base frame 41 has mounting pins 56 formed at its four corners that protrude downward, and the mounting pins 56 have horizontal holes formed in them. On the other hand, the docking frame 51 has receiving holes 57 formed in the vertical direction into which the mounting pins 56 fit, and further has a horizontal hole formed at a position that coincides with the horizontal hole of the mounting pin 56 and intersects the receiving hole 57. With this fixing structure, the base frame 41 and the docking frame 51 are fitted with the mounting pins 56 inserted into the receiving holes 57, and then a stop pin 58 is inserted into the overlapping horizontal hole. Note that the relationship between the mounting pins 56 and the receiving holes 57 may be reversed between the base frame 41 and the docking frame 51.

[0020] Next, Figures 6 and 7 are diagrams showing the hydraulic circuit of the obstacle remover 1. In particular, Figure 6 shows the flow of hydraulic oil in the normal mode in which the lifting cylinder 24 is used to raise and lower the auger 3, and Figure 7 shows the flow of hydraulic oil in the enhanced mode in which the thrust jack 53 (jack cylinder 67) of the auger lifting device 5 is used.

[0021] The obstacle remover 1 is configured so that mode switching control is possible in the controller, and the hydraulic circuit, which will be described later, can be switched by operating the remote control box. Even when the obstacle remover 1 raises and lowers the auger 3 using the auger lifting device 5, the auger 3 moves while attached to the leader 13 and is also connected to the lifting cylinder 24. The mode switching is intended to prevent the lifting cylinder 24 and other components from interfering with the extension and retraction of the thrust jack 53.

[0022] First, a directional control valve 71 is provided on the lifting cylinder 24, and a directional control valve 72 is provided on the four jack cylinders 67, each as a control valve, and these are piped between the lifting cylinder 24 or jack cylinder 67 and the hydraulic pump P or tank T. The directional control valves 71 and 72 are four-port, three-position hydraulic pilot-operated directional control valves, and are switched by pilot pressure supplied from the pilot port. To operate the supply of such pilot pressure, a solenoid-operated directional control valve 73 is provided on the directional control valve 71, and a solenoid-operated directional control valve 74 is provided on the directional control valve 72.

[0023] The solenoid controlled directional control valves 73, 74 are connected to a supply oil passage 81 to which hydraulic oil is supplied from the hydraulic pump P and a discharge oil passage 82 for returning the hydraulic oil to the tank T, and are connected to pilot oil passages 831, 832, 841, 842, respectively, so that pilot pressure can be applied to each pilot port of the directional control valves 71, 72. A center bypass 80 also passes through the directional control valves 71, 72, and hydraulic oil is supplied from the hydraulic pump P to extend and retract the lifting cylinder 24 and the jack cylinder 67.

[0024] A push-side oil passage 851 and an extraction-side oil passage 852 are connected between the lifting cylinder 24 and the directional control valve 71, and a pilot check valve 75 is provided to allow reverse flow of the push-side oil passage 851 depending on the hydraulic pressure in the extraction-side oil passage 852. The lifting cylinder 24 is configured to prevent the auger 3 from falling in the leader 13 by a hydraulic circuit equipped with the pilot chuck valve 75 and the P-port block type directional control valve 71. Meanwhile, the directional control valve 72 is of an all-port block type, and a push-side oil passage 861 and an extraction-side oil passage 862 are branched and connected to the four jack cylinders 67.

[0025] Additionally, a circuit for releasing hydraulic pressure is configured in the lifting cylinder 24. When lifting and lowering the auger 3 with the auger lifting device 5, it is desirable to structurally separate the auger 3 from the lifting cylinder 24 and the leader 13 so that it can be raised and lowered freely. However, this increases the workload required to install the auger lifting device 5. Therefore, the lifting cylinder 24, the front-rear swing cylinder 26, and the left-right swing cylinder 27 are configured with hydraulic pressure release circuits that release hydraulic pressure in specified cases and eliminate any adverse effects on work using the auger lifting device 5.

[0026] The hydraulic pressure release circuit is activated by mode switching, and a push-side oil passage 851 and a pull-side oil passage 852 connected to the lift cylinder 24 are connected via pilot switching valves 76, 77 to a discharge oil passage 87 that releases hydraulic oil to tank T. An electromagnetic switching valve 78 connected to the supply oil passage 81 is connected to the pilot switching valves 76, 77 via a pilot oil passage 88, so that the supply of pilot pressure can be operated.

[0027] Next, Figure 8 shows a hydraulic circuit for the front-rear swing cylinder 26 and the left-right swing cylinder 27, which allows mode switching. A directional control valve 91 is connected to the front-rear swing cylinder 26, and a directional control valve 92 is provided as a control valve for the left-right swing cylinder 27. The directional control valves 91 and 92 are four-port, three-position hydraulic pilot-operated directional control valves that can be manually operated and switched using pilot pressure. Pilot pressure is supplied to the corresponding ports from solenoid-operated directional control valves 93, 94, 95, and 96, which are connected to the supply oil passage 81, via pilot oil passages 111, 112, 113, and 114.

[0028] The directional control valves 91, 92 are connected to a hydraulic pump P and a tank T via oil passages 101, 102. The direction control valve 91 is connected to the longitudinal swing cylinder 26 via oil passages 103, 104, and the direction control valve 92 is connected to the left-right swing cylinder 27 via oil passages 105, 106. In this embodiment, hydraulic release circuits for releasing hydraulic oil are also configured in the longitudinal swing cylinder 26 and the left-right swing cylinder 27. That is, drain oil passages 121, 122, 123, 124 are connected to the oil passages 103, 104, 105, 106 that supply and discharge hydraulic oil to the longitudinal swing cylinder 26 and the left-right swing cylinder 27, and are connected to the drain oil passage 82 via solenoid switching valves 97, 98.

[0029] Next, we will explain the removal work performed by the obstacle remover 1. The obstacle remover 1 normally performs removal work using only the auger 3. At this time, the hydraulic circuit is controlled in normal mode, which will be described later. First, the obstacle remover 1 moves the auger 3 to a predetermined work position by operating the undercarriage 11, and then adjusts it to match the driving position of the casing K. Then, the leader 13 is tilted, i.e., the auger 3 is leveled, by extending and retracting the front-to-back swing cylinder 26 and the left-to-right swing cylinder 27. Furthermore, the obstacle remover 1 is stabilized during removal work by the front jack 61 and leader jack 62 located at the front, or the weight 64 and rear jack 63 mounted at the rear.

[0030] In the obstacle remover 1, the auger 3, which has been moved to a raised position by the extension of the lifting cylinder 24, grips the casing K, and the rotation is transmitted to the cone via a reducer and a transmission gear by the drive of the hydraulic motor 45, causing the casing K to rotate. At the same time, the lifting cylinder 24 contracts, causing the casing K to descend together with the auger 3, with the carbide bit at the tip cutting a circular path through the concrete or other material present underground. The auger 3 releases the casing K with each stroke of the lifting cylinder 24, returns to the raised position, and re-grabs it. Furthermore, because the casing K only has a fixed length, when pushing it deeper, as many extension casings K as necessary are sequentially connected.

[0031] After that, the casing K that has been pushed to a predetermined depth is pulled out, and pieces of concrete that have been cut off from the surrounding area are grabbed and discharged by a hammer grab suspended from a mobile crane. The casing K is pulled out by reverse rotation of the auger 3 and lifting of the lifting cylinder 24. During the pulling out process, the auger 3 is repeatedly re-grabbed in accordance with the stroke of the lifting cylinder 24, and the pulled-out extension casing K is separated.

[0032] The force required to pull out the casing K varies depending on the depth of the casing K pushed into the ground and the ground conditions such as concrete, and it may be difficult to pull out the casing K using only the output of the lifting cylinder 24. In such cases, the casing K is pulled out using the auger lifting device 5, but the hydraulic circuit is controlled in the reinforced mode, which will be described later.

[0033] First, the auger lifting device 5 is placed under the raised auger 3 as shown in Figure 3, and the mounting pin 56 of the base frame 41 is inserted into the receiving hole 57 of the docking frame 51. Then, as shown in Figure 5, a stop pin 58 is inserted into the overlapping horizontal holes of the mounting pin 56 and the receiving hole 57, and the auger 3 and the auger lifting device 5 are integrated. After that, the auger lifting device 5 placed on the ground is leveled by extending and retracting the horizontal jack 54.

[0034] When the casing K is to be pulled out, the auger lifting device 5 first retracts the thrust jack 53, shortening the distance between the docking frame 51 and the lower frame 52, as shown in the left half of Fig. 5 . Then, the auger 3 retracts the chuck cylinder 46, gripping the casing K with the chuck 44. The auger 3 is then driven by the hydraulic motor 45 to rotate the casing K in the reverse direction, and the auger lifting device 5 extends the jack cylinder 67 of the thrust jack 53, lifting the auger 3, as shown in the right half of Fig. 5 . Therefore, the casing K is pulled out upward while rotating in the reverse direction. Even when the auger lifting device 5 is used, the auger 3 can only be pulled out by the stroke of the thrust jack 53, so the auger 3 is re-gripped by the retraction operation.

[0035] Next, hydraulic operation in the normal mode and enhanced mode will be described. First, when the auger 3 that rotates the casing K is raised or lowered by the lifting cylinder 24, the mode switch on the remote control box is switched to normal mode. When a lifting operation is performed, pilot pressure is supplied to the directional control valve 71 from one of the pilot oil passages 831, 832 by switching control of the solenoid directional control valve 73. When the casing K is pushed in, hydraulic oil is supplied to the lifting cylinder 24 from the push-side oil passage 851, and when the casing K is pulled out, hydraulic oil is supplied to the lifting cylinder 24 from the pull-side oil passage 852.

[0036] Next, when the auger 3 is raised and lowered by the auger lifting device 5 in an enhanced mode in which the auger 3 is raised and lowered using the auger lifting device 5, the mode switch on the remote control box is switched to the enhanced mode. Then, pilot pressure is supplied from the pilot oil passage 88, and the pilot selector valves 76, 77 are switched. As a result, the hydraulic oil in the lifting cylinder 24 is discharged from the discharge oil passage 87 to the tank T. The hydraulic pressure is released, and the rod-side chamber and the head-side chamber of the lifting cylinder 24 are connected, allowing the lifting cylinder 24 to freely expand and contract in response to external forces. Furthermore, the solenoid selector valves 97, 98 are switched to switch the hydraulic oil passages 121, 122 of the front-rear swing cylinder 26 and the left-right swing cylinder 27 so that the discharge oil passages 123, 124 are connected to the discharge oil passage 82 and the discharge oil passages 121, 122 are connected to the discharge oil passage 82, and the hydraulic oil passages 123, 124 are connected to the discharge oil passage 82, allowing the hydraulic oil inside to be discharged to the tank T. As a result, the hydraulic pressure is released and the rod side chamber and the head side chamber are connected, allowing the front-rear swing cylinder 26 and the left-right swing cylinder 27 to freely expand and contract due to external forces.

[0037] Therefore, when a leveling operation or the like is performed, the auger lifting device 5 adjusts the extension and retraction of the four horizontal jacks 54 without being affected by the lifting cylinders 24 or the like. At this time, the lifting cylinders 24, the front-rear swing cylinders 26, and the left-right swing cylinders 27 extend and retract in response to external forces such as the vertical displacement of the auger 3 and the tilt displacement of the leader 13. Similarly, when the thrust jacks 53 (jack cylinders 67) of the auger lifting device 5 are extended and retracted to displace the auger 3 in the vertical direction, there is no resistance from the lifting cylinders 24, the front-rear swing cylinders 26, and the left-right swing cylinders 27.

[0038] Next, when adjustments such as leveling of the auger lifting device 5 are completed and the hydraulic motor 45 is rotated and the thrust jack 53 is raised and lowered, the electromagnetic directional control valves 97, 98 are closed and the discharge oil passages 121, 122, 123, 124, which are release passages for hydraulic oil from the front-rear swing cylinder 26 and the left-right swing cylinder 27, are blocked so that the reaction force received by the auger 3 to rotate the casing K can be supported by the leader 13. Meanwhile, the lifting cylinder 24 remains in a state in which it is free to extend and retract with hydraulic pressure released.

[0039] Then, by switching control of the electromagnetic switching valve 74, pilot pressure is supplied from one of the pilot oil passages 841, 842 to the directional control valve 72. When the casing K is pushed in, hydraulic oil is supplied from the push-side oil passage 861 to the four jack cylinders 67, and when the casing K is pulled out, hydraulic oil is supplied from the pull-out-side oil passage 862 to the four jack cylinders 67. With this auger lifting device 5, it is possible to pull out the casing K, which would be difficult with the output of the lifting cylinders 24 alone.

[0040] Therefore, the obstacle removal machine 1 of this embodiment can carry the auger 3 freely by moving the pile driver 2, allowing for efficient removal work at multiple locations. Furthermore, even if the lifting cylinder 24 of the pile driver 2 does not have enough force to pull out the casing K during removal work, by attaching the auger lifting device 5 to the auger 3, the obstacle removal machine 1 can generate sufficient pulling force using the thrust jack 53.

[0041] By providing an enhanced mode in addition to a normal mode, the obstacle remover 1 can eliminate the effects of the lifting cylinder 24, front-rear swing cylinder 26, and left-right swing cylinder 27 provided in the pile driver 2 when using the auger lifting device 5. In particular, in the enhanced mode, if hydraulic pressure release control is not performed, the lifting force (pressure) from the thrust jack 53 may act on the fixed lifting cylinder 24, front-rear swing cylinder 26, and left-right swing cylinder 27. Therefore, by performing hydraulic pressure release control in the enhanced mode, damage to the lifting cylinder 24, front-rear swing cylinder 26, and left-right swing cylinder 27 can be prevented.

[0042] Although one embodiment of the present invention has been described above, the present invention is not limited to this and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0043] 1... Obstacle removal machine 2... Pile driver 3... Auger 5... Auger lifting device 13... Leader 24... Lifting cylinder 26... Front-to-back swing cylinder 27... Left-to-right swing cylinder 45... Hydraulic motor 53... Thrust jack 54... Horizontal jack 67... Jack cylinder 71, 72... Directional control valve 73, 74... Solenoid switching valve 76, 77... Pilot switching valve 78... Solenoid switching valve

Claims

1. The auger is a rotary drive device that can be raised and lowered along the leader of the pile driver. The auger has a normal mode in which it is raised and lowered by a lifting cylinder provided on the leader, and an enhanced mode in which it is raised and lowered by a thrust jack of an auger lifting device attached to the underside of the auger, In the enhanced mode, hydraulic pressure release control is performed on the lifting cylinder and the swinging cylinder that adjusts the inclination of the leader, which are used in the normal mode.

2. 2. The obstacle remover according to claim 1, wherein the auger lifting device comprises: a docking frame having a fixed structure with a base frame constituting the auger; a lower frame having a horizontal jack arranged below the docking frame; and a thrust jack connecting the docking frame and the lower frame.

3. 3. The obstacle remover according to claim 1 or 2, wherein the reinforced mode controls the release of hydraulic pressure for the lifting cylinder and the swinging cylinder during adjustment work using the horizontal jack.

4. 4. The obstacle removal machine according to claim 3, wherein in the enhanced mode, when the auger is raised and lowered by the thrust jack of the auger lifting device without outputting rotation, hydraulic pressure is released from the lifting cylinder and the swinging cylinder.

5. 4. The obstacle removal machine of claim 3, wherein in the enhanced mode, when the auger, which outputs rotation, is raised and lowered by the thrust jack of the auger lifting device, the hydraulic oil release flow path provided in the swing cylinder is blocked and hydraulic pressure is released from the lifting cylinder.

6. 2. The obstacle remover according to claim 1, wherein the swing cylinder comprises a front-to-rear swing cylinder that adjusts the tilt of the leader in the front-to-rear direction, and a left-to-right swing cylinder that adjusts the tilt of the leader in the left-to-right direction.

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