JP5485025B2 - Underground pile insertion and removal equipment - Google Patents

Description

  The present invention is suitable for use in work for drawing out and removing underground piles such as concrete piles, concrete piles, etc. that remain in the ground after dismantling of the structure, or drilling work and insertion work for burying piles in the ground. The present invention relates to a device for inserting and removing underground piles.

  Since concrete piles and concrete piles remain buried in the ground after the removal of buildings and other structures, it is necessary to remove these underground piles. Therefore, as an example, drilling is performed by rotating a drilling casing with a drilling blade and a crushing blade at the tip of a cylinder on the outer periphery of the underground buried pile, exposing the upper side of the underground buried pile and crushing the upper end side thereof This is repeated, and finally the underground pile is pulled out.

As shown in FIG. 1 of Patent Document 1, this type of pile unloading machine includes a leader mast 2 that guides the auger shaft 7 by suspending it in a substantially vertical shape. And a special working machine such as a crawler crane having a long crane boom in order to support it in a suspended state.

Japanese Examined Patent Publication No. 6-104970

  As described above, the removal of underground buried piles requires a dedicated work machine such as a crawler crane that supports a leader of approximately the same length as the auger, and therefore there is a problem that a large equipment cost is required, the work site The problem is that it is necessary to pay attention to the wires and signs when moving to the road, and the work efficiency is poor due to the fact that the turning radius is large, so it is necessary to pay sufficient attention to changing the direction at the intersection. There is a problem that sufficient attention must be paid to ensuring stability because it is easily affected by strong winds. A similar problem exists in a working machine that hangs an earth auger and drills a pile burial hole in the ground.

  The present invention has been made in view of the above-mentioned drawbacks of the prior art, and since the leader is reduced to approximately half the length when not in operation, the reader should be used as an attachment to a working machine having a front such as a hydraulic excavator. Providing an underground pile pile insertion / removal device that is excellent in safety because it can respond quickly to strong winds and is excellent in workability because it can be moved and moved in the same way as a normal work machine The purpose is to do.

Means for constructing the present invention according to claim 1 for solving the above-described problem is constructed by inserting an outer cylinder in a longitudinally displaceable manner into an inner cylinder supported by a working machine, and suspending a hydraulic motor. A leader that guides in this state, one end connected to the inner cylinder, extended outward through a guide pulley provided at the upper end of the outer cylinder, and the other end side a motor support cable for supporting the hydraulic motor in a suspended state A reader extension mechanism that raises the outer cylinder relative to the inner cylinder, a reader reduction mechanism that lowers the outer cylinder relative to the inner cylinder, and a drive source that operates the reader reduction mechanism and the reader extension mechanism Consists of.

  According to a second aspect of the present invention, there is provided a reader for guiding the outer cylinder in a suspended state by inserting the outer cylinder into the inner cylinder supported by the work machine so as to be displaceable in the vertical direction. And one end is connected to the inner cylinder, extends outward through a guide pulley provided at the upper end of the outer cylinder, and the other end is a motor support cable for supporting the hydraulic motor in a suspended manner, and the inner cylinder A leader extension mechanism in which a lifting tow rope stretched between a lower end and a lower end of an outer cylinder is wound around a lifting guide wheel provided in the inner cylinder so as to be movable up and down, and the inner cylinder A leader contraction mechanism comprising a lowering tow rope stretched between the upper end of the outer cylinder and the upper end of the outer cylinder, and a lower part of the lower pulling rope wound around a lowering guide wheel provided in the inner cylinder so as to be able to move up and down; The leader reduction mechanism and the leader extension mechanism are provided on a cylinder to raise and lower the lifting guide wheel and the lowering guide wheel. Comprising a drive source for operating.

The reader may be configured to detachably attach the inner cylinder to the front of the work implement.

In addition, the guide wheel disposed on the lower side of the outer surface of the outer cylinder and the interlocking with one end engaged with the suspended hydraulic motor and the other end engaged with the upper end side of the inner cylinder via the guide wheel. It is good to provide the excavation pressurization mechanism comprised from a rope.

Since the present invention is configured as described above, the following effects can be obtained.
(1) Since the leader is composed of an inner cylinder and an outer cylinder, and the outer cylinder that suspends and guides the hydraulic motor is configured so that it can be raised and lowered, it can be reduced to about half the length during transportation and has excellent transportability. ing.
(2) Pull-out or excavation work such as connecting a drill casing or earth auger to the hydraulic motor, and dismantling work after the work can be done with the outer cylinder lowered, so work at high places It can be eliminated, and the drawing operation can be started immediately.
(3) A strong wind during work can be quickly dealt with by reducing the reader.
(4) Since the insertion / removal device of the present invention can be used as a work attachment attached to a work machine having a front, it is easy to handle and excellent in convenience.
(5) Since it can be used by attaching it to a work machine having a front, a special pulling work machine with a long crane boom is not required, and equipment costs can be reduced. Necessary special skills are unnecessary, so labor costs can be reduced and work processes can be made more efficient.
(6) The excavation pressurizing mechanism forcibly pulls the hydraulic motor downward in conjunction with the ascending operation of the outer cylinder relative to the inner cylinder, so that the excavation blade can be loaded in the excavation direction. , Can increase the drilling efficiency.

It is use condition explanatory drawing of the insertion / extraction apparatus of the underground buried pile which concerns on embodiment of this invention. It is an inside explanatory view of a leader in an extension state. It is an internal explanatory view of the reader in a reduced state. It is operation | movement explanatory drawing when expand | extracting a reader | leader. It is operation | movement explanatory drawing in the case of reducing a reader | leader. It is a partial explanatory view of a state in which a hydraulic motor is supported by a reader. It is VII-VII arrow direction sectional drawing in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings by taking an underground buried pile drawing device as an example. In FIG. 1, 51 is a working machine used for work by the underground pile extracting device 1. As long as the working machine 51 has a work front 51 </ b> A, a hydraulic excavator, a backhoe, or the like can be used.

  2 shows the leader which comprises the pulling-out apparatus 1 of this underground buried pile, and guides the hydraulic motor 32 mentioned later in the state suspended substantially vertically. 3 is a hollow inner cylinder that constitutes the reader 2, and the inner cylinder 3 is a substantially U-shaped cylinder part 3A having a rectangular cross section, a bottom plate part 3B, a top plate part 3C, and a tip bent inward. And an outer cylinder holding body 3D fixed so as to cover one side surface of the cylinder portion 3A. Reference numeral 4 denotes a mounting bracket projecting from the outer cylinder holding body 3D. The mounting bracket 4 is detachably connected to the work front 51A, and the inner cylinder 3 is used for other work such as a bucket or a crusher. It can be easily attached to and detached from the work machine 51 as in the case of the attachment.

  Reference numeral 5 denotes an outer cylinder constituting the reader 2, and the outer cylinder 5 is configured in a cylindrical shape with a lower end opened from a cylindrical section 5A having a rectangular cross section and a top plate section 5B, and is provided on one side plate of the cylindrical section 5A. Is formed with a vertically long slit 5C in which the mounting bracket 4 is loosely fitted. Reference numeral 6 denotes a guide pulley provided on the outer surface of the top plate portion 5B. The guide pulley 6 is a base 6A formed in a substantially square shape fixed to the top plate portion 5B, and a pair of pulley bodies pivotally attached to the base 6A. 6B and 6C. 7, 7,... Are thrust plates interposed between the outer cylinder 5, the inner cylinder 3 and the outer cylinder holding body 3D. The thrust plate 7 is used to prevent the outer cylinder 5 from rattling or seizing. It uses gun metal and synthetic resin.

  Reference numeral 8 denotes a motor support rope, and the motor support rope 8 is connected to a hook 9 whose base end 8A is fixed to the outer surface of the top plate portion 3C of the inner cylinder 3, and is inserted into an opening formed in the top plate portion 5B of the outer cylinder 5. Then, it extends around the guide pulley 6 and extends outward, and a hydraulic motor 32 is attached to its tip 8B.

  Reference numeral 10 denotes a reader extension mechanism for raising the reader 2 from the contracted state to the extended state. As shown in FIGS. 4 and 5, reference numeral 11 denotes a fixed support base that constitutes the leader extension mechanism 10 and is fixed to the bottom plate portion 3 </ b> B of the inner cylinder 3. The fixed support base 11 includes a pair of fixed pulleys 12, 13. Is attached. Reference numeral 14 denotes a hydraulic cylinder which is erected on the bracket 11A of the fixed support base 11. A piston 14A of the hydraulic cylinder 14 protrudes upward.

Reference numeral 15 denotes a guide wheel support that is supported by the piston 14A so as to be movable up and down. The guide wheel support 15 is a frame body that is open on the side by an upper plate 15A and a lower plate 15B, a pair of side plates 15C and 15C, and a pair of connecting plates 15D and 15D projecting downward on the lower plate 15B. The reinforcing member 15E is fixed in the vertical direction between the upper plate 15A and the lower plate 15B. The distal end side of the piston 14 </ b> A is pivotally attached to the pair of connecting plates 15 </ b> D and 15 </ b> D, and the guide wheel support 15 can be moved up and down by the hydraulic cylinder 14.

  Reference numerals 16 and 17 constitute a leader extension mechanism 10 and are lifting guide wheels that are pivotally supported on the guide wheel support 15. The lifting guide wheels 16 and 17 are formed of a pair of two pairs. Reference numeral 18 denotes a guide wheel that is pivotally supported at the upper end corner of the inner cylinder 3. Reference numeral 19 denotes a lifting tow rope wound around the fixed pulley 12 and the lifting guide wheel 16. The lifting tow rope 19 is engaged with a hook 20 whose base end 19A is fixed to the bottom plate portion 3B of the inner cylinder 3. Around the guide wheel 16, the fixed pulley 12, the lifting guide wheel 17, the fixed pulley 13, and the guide wheel 18, the distal end side 19B extends to the outside of the inner cylinder 3, and the distal end 19C is fixed to the lower end of the outer cylinder 5. It is attached to the hook 21.

  Reference numeral 22 denotes a reader reduction mechanism. Reference numerals 23 and 24 denote a pair of lowering guide wheels constituting the leader reduction mechanism 22, and the lowering guide wheels 23 and 24 are pivotally supported on the guide wheel support 15. A fixed pulley 25 is pivotally supported on a mounting bracket 26 fixed to the inner surface of the top plate portion 3C of the inner cylinder 3. Reference numeral 27 denotes a lowering towline stretched between the inner cylinder 3 and the outer cylinder 5, and the lowering towline 27 is engaged with a hook 28 having a base end 27A fixed to the inner surface of the top plate portion 3C to induce the lowering. It hangs around the wheel 23, the fixed pulley 25, and the descending guide wheel 24, passes through the opening of the top plate portion 3C of the inner cylinder 3 and extends outward, and the tip 27B is fixed to the inner surface of the top plate portion 5B of the outer cylinder 5. The hook 29 is attached.

  Further, 30 and 30 are two guide rails made of a cylinder provided in the vertical direction on the outer surface of the outer cylinder 5, and 31 and 31 are a pair of upper and lower sliders slidably fitted on the guide rail 30. A known hydraulic motor 32 is supported by the sliders 31, 31, and is rotationally driven by fitting an earth auger or a hole casing to the rotating shaft 32 </ b> A of the hydraulic motor 32.

Reference numeral 33 denotes an excavation pressurizing mechanism for increasing excavation efficiency by applying a downward traction force to the hydraulic motor 32 during excavation by the hydraulic motor 32. Reference numeral 34 denotes a guide wheel constituting the excavation and pressurizing mechanism 33, and the guide wheel 34 is pivotally supported on the lower end of the guide rail 30. Reference numeral 35 denotes an interlocking cable, and one end 35A of the interlocking cable 35 is engaged with the hydraulic motor 32, extends upward through the guide wheel 34, and the other end 35B is engaged with the outer surface on the upper end side of the inner cylinder 3. It is.

  The present embodiment has the above-described configuration, and the operation thereof will be described below. The reader 2 is detachably attached to the work machine 51 by pin-connecting the mounting bracket 4 of the inner cylinder 3 to the work front 51A of the work machine 51. When the work is performed with the leader 2 extended, as shown in FIG. 4, when the guide wheel support 15 is lifted by extending the piston 14A of the hydraulic cylinder 14 in the direction of the arrow, the lifting guide wheel 16 is lifted. 17 and the fixed pulleys 12 and 13 are separated from each other, and the retracted tow rope 19 that is wound becomes longer.

For example, if the stroke of the piston 14A is 1.5 m, the lifting tow rope 19 is wound four times between the fixed pulleys 12 and 13 and the lifting guide wheels 16 and 17, so that the tip side is lifted by 6 m. . Thus, as a result of pulling up the front end side 19B connected to the lower end of the outer cylinder 5 via the guide wheel 18, the outer cylinder 5 rises to a predetermined height.

  On the other hand, when the leader 2 is reduced in accordance with the depth of excavation, as shown in FIG. 5, when the piston 14 </ b> A of the hydraulic cylinder 14 is retracted in the direction indicated by the arrow, the guide wheel support 15 is lowered and the fixed pulley 25. And the descent guide wheels 23 and 24 are separated from each other, and the descent tow rope 27 wound between the fixed pulley 25 and the descent guide wheels 23 and 24 becomes longer and is connected to the outer cylinder 5. When the tip 27B is pulled down, the outer cylinder 5 is lowered. In conjunction with this, the motor support cable 8 extends from the guide pulley 6 to the hydraulic motor 32, and the hydraulic motor 32 descends.

  When the outer cylinder 5 is lowered, the hydraulic motor 32 and the upper end of the inner cylinder 3 are separated from each other, and the interlocking cable 35 stretched between them is extended to pull the hydraulic motor 32 downward (FIG. 3). Reference), a downward load that is the excavation direction can be applied to the hydraulic motor 32. Thereby, it is possible to perform excavation more efficiently compared to the conventional technique in which the excavation force is applied only by the own weight of the hydraulic motor 32.

  In this way, by driving the hydraulic cylinder 14 and moving the piston 14A forward and backward, the guide wheel support 15 is raised and lowered, and in conjunction with this, the outer cylinder 5 is raised and lowered to the work end state reduced from the work state. The excavation efficiency can be increased by switching to the hydraulic motor 32 and acting on the traction force.

  In this embodiment, the underground pile removal device has been taken as an example, but the present invention device can be used to rotate a drilling casing or earth auger for inserting the pile in the ground. It can also be used for drawing work.

DESCRIPTION OF SYMBOLS 1 Pull-out device of underground pile 2 Leader 3 Inner cylinder 5 Outer cylinder 8 Motor support rope 8A Base end 8B Tip 10 Leader extension mechanism 14 Hydraulic cylinder (drive source)
16, 17 Lifting guide wheel 19 Lifting tow rope 22 Leader reduction mechanism 23, 24 Lowering guide wheel 27 Lowering tow rope 32 Hydraulic motor 33 Excavation pressurizing mechanism 34 Guide wheel 35 Interlocking rope 51 Working machine 51A Work front

Claims (4)

  The outer cylinder is inserted into the inner cylinder supported by the work machine so that the outer cylinder can be displaced in the vertical direction, a leader for guiding the hydraulic motor in a suspended state, and one end connected to the inner cylinder, A motor support line that extends outwardly through a guide pulley provided at the upper end, and the other end side suspends and supports the hydraulic motor; a leader extension mechanism that raises the outer cylinder relative to the inner cylinder; An underground pile insertion / removal device comprising a leader reduction mechanism for lowering the outer cylinder with respect to a cylinder, and a drive source for operating the leader reduction mechanism and the leader extension mechanism.   The outer cylinder is inserted into the inner cylinder supported by the work machine so that the outer cylinder can be displaced in the vertical direction, a leader for guiding the hydraulic motor in a suspended state, and one end connected to the inner cylinder, For lifting, extending between a lower end of the inner cylinder and a lower end of the outer cylinder, and a motor support cable that suspends and supports the hydraulic motor on the other end side through a guide pulley provided at the upper end. A leader elongating mechanism in which a tow rope is wound around a lifting guide wheel provided in the inner cylinder so as to be movable up and down, and a descent stretched between the upper end of the inner cylinder and the upper end of the outer cylinder Leader retractor mechanism, which is constructed by winding a middle part around a lowering guide wheel provided in the inner cylinder so as to be able to move up and down in the inner cylinder, and provided in the inner cylinder, raising and lowering the lifting guide wheel and the lowering guide wheel Embedded in the ground comprising a drive source for operating the leader reduction mechanism and the leader extension mechanism Insertion and removal device.   The underground leader pile insertion / removal device according to claim 1, wherein the leader is configured to detachably attach the inner cylinder to the front of the working machine.   A guide ring disposed on the lower side of the outer surface of the outer cylinder, and an interlocking cord having one end engaged with the suspended hydraulic motor and the other end engaged with the upper end side of the inner cylinder via the guide ring. An underground pile pile insertion / removal device according to claim 1 or 2, characterized in that an excavation and pressure mechanism comprising:

Images