JP2015212464A - Pile extraction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile extraction device removable (extractable) by surely holding an existing pile, in response to removal of an old building, in the present invention.SOLUTION: A pile extraction device comprises a cylindrical casing body, an excavation cylindrical body 2 concentrically arranged on the outside of the cylindrical casing body 1, a storage cylindrical body 4 concentrically arranged in the cylindrical casing body 1, a driving auxiliary mechanism body 5 and a pile support arm body 6. The driving auxiliary mechanism body 5 freely moves in an axial direction A to the excavation cylindrical body 2 by integrating the cylindrical casing body 1 and the storage cylindrical body 4, or freely rotates around an axis a by integrating the cylindrical casing body 1, the excavation cylindrical body 2 and the storage cylindrical body 4. The pile support arm body 6 is interlocked with a movement in the axial direction A of the cylindrical casing body 1 and the storage cylindrical body 4, and is arranged in a retreat position T1 outside of an inner cylindrical part 4A of the storage cylindrical body 4 or an advance position T2 in the inner cylindrical part 4A. The pile support arm body 6 supports a lower end of an existing pile K inserted into the inner cylindrical part 4A in the advance position T2.

Description

  The present invention relates to a pile removing device for removing an existing pile buried in the ground.

  As a pile removing device, Patent Literature 1 includes a casing, a pair of chuck claws, a pair of hydraulic cylinders, a pair of guides, and a pair of connecting rods, and the existing piles accommodated in the casing are supported by the chuck claws. A drawing device is disclosed. The pulling device supports each hydraulic cylinder on the outside of the casing, arranges each connecting rod on the outside of the casing, and connects the cylinder rod and each connecting rod of each hydraulic cylinder with each guide. Each chuck claw is pivotally connected to each connecting rod, and is moved to a protruding posture or a retracting posture by moving the connecting rod up and down by each hydraulic cylinder. Each chuck claw in the protruding posture supports the lower end of the existing pile housed in the casing.

JP 2000-154541 A

  In Patent Document 1, each hydraulic cylinder, each connecting rod, and the like are arranged outside the casing, and each chuck claw is in a retracted posture or a projecting posture. There is a possibility that earth pressure or the like acts on the rod and each connecting rod, so that each chuck claw cannot be reliably placed in the retracted posture or the protruding posture. In addition, there is a risk that sand and gravel will come into contact with the cylinder rod and each connecting rod of the hydraulic cylinder during the excavation and breakage.

  An object of the present invention is to provide a pile removing device that can reliably support (hold) an existing pile.

  According to a first aspect of the present invention, there is provided a cylindrical casing body that is rotated around an axial center and moved in the axial direction, and is disposed concentrically outside the cylindrical casing body, from the lower end of the cylindrical casing body in the axial direction. An excavation cylinder extending from the outer cylindrical portion and a concentric arrangement in the cylindrical casing body, extending the inner cylindrical portion into the outer cylindrical portion from the lower end of the cylindrical casing body, and inserting an existing pile into the inner cylindrical portion The accommodating cylinder, the cylindrical casing and the accommodating cylinder are integrally movable in the axial direction, or the movement of the cylindrical casing and the accommodating cylinder is restricted, and the cylindrical casing and the respective A driving auxiliary mechanism that integrally rotates the cylindrical body and rotates around the axis, and interlocks with the movement of the cylindrical casing body and the accommodating cylindrical body, A pile support arm body that is disposed at a retracted position or an advanced position in the inner cylindrical portion, and supports a lower end of the existing pile that is inserted into the inner cylindrical portion at the advanced position. A punching device.

  According to a second aspect of the present invention, the drive assist mechanism is formed in the excavation cylinder, and is formed in the excavation cylinder, a lower horizontal elongated hole extending in a circumferential direction of the excavation cylinder, The upper horizontal hole, which is arranged in parallel with the lower horizontal elongated hole at intervals in the circumferential direction and the axial direction, and extends in the circumferential direction, is formed in the drilling cylinder, and the axial center A longitudinally elongated hole extending in the direction and communicating with one end of the adjacent upper and lower laterally elongated holes, and the accommodating cylindrical body, and the upper and lower elongated holes are formed in a circumferential direction of the accommodating cylindrical body. A horizontally elongated hole extending between the other end portions of the hole, and a guide pin fixed to the cylindrical casing body and slidably inserted through the elongated holes from a direction perpendicular to the axial direction and the circumferential direction. The guide pin is positioned in the lower lateral elongated hole at the retracted position, and A pile vent apparatus according to claim 1, characterized in that it is positioned on the upper horizontal hole at the advanced position.

According to a third aspect of the present invention, the pile support arm body is disposed outside the inner cylindrical portion at the retracted position, and is disposed within the inner cylindrical portion at the advanced position. When,
A first fixed shaft rotatably supporting the upper end portion of the first arm on the excavation cylindrical body outside the inner cylindrical portion; and a lower end portion of the second arm outside the inner cylindrical portion. A second fixed shaft that is rotatably supported by the body, and a movable shaft that rotatably connects the lower end portion of the first arm and the upper end portion of the second arm, and the movable shaft is retracted 3. The pile removing device according to claim 1, wherein the pile removing device is arranged at a position so as to be unevenly distributed on the inner cylindrical portion side from each of the fixed shafts.

  A fourth aspect of the present invention includes a guide groove and a guide member that are disposed between the outer cylindrical portion and the inner cylindrical portion and guide the movement and rotation of the accommodating cylindrical body, and the guide groove includes the outer cylindrical portion. Arranged in one of the cylindrical part or the inner cylindrical part and extending in the axial direction, the guide member is arranged in the other of the outer cylindrical part and the inner cylindrical part and is slidable in the guide groove The pile removing device according to any one of claims 1 to 3, wherein the pile removing device is fitted.

  In claim 1 according to the present invention, by making the cylindrical casing body, the excavating cylinder body, and the accommodating cylindrical body integrally rotatable with the drive assist mechanism body, and rotating the cylindrical casing forward about the axis center, Excavate the ground and insert the existing pile into the inner cylindrical part. Next, each pile support arm can be moved by moving the cylindrical casing in the axial direction by making the cylindrical-singing body and the receiving cylindrical body integral with the drive assist mechanism so as to be movable in the axial direction with respect to the drilling cylinder. The body can be placed at the advanced position, and the lower end of the existing pile can be supported at the advanced position. Since the accommodating cylinder is arranged in the cylindrical casing and the excavating cylinder, it is not affected by earth pressure or the like in the ground, and does not come into contact with gravel during excavation. Each pile support arm body can be arranged at the advanced position or the retracted position.

  According to a second aspect of the present invention, the cylindrical casing body is rotated and moved, and the guide pin is disposed in the lower laterally elongated plan hole or the upper laterally elongated hole, so that the cylindrical casing body and the accommodating cylindrical body are integrated as an excavating cylindrical body. However, it can be moved in the axial direction. Further, the guide pin is brought into contact with the upper or lower lateral hole and the laterally elongated hole from the axial direction at the upper or lower laterally elongated hole, thereby moving the cylindrical casing body and the accommodating cylindrical body in the axial direction with respect to the drilling cylindrical body. The cylindrical casing body, the excavation cylinder body, and the housing cylinder body can be integrally rotated around the axis.

  According to the third aspect of the present invention, the second arm can be moved in the axial direction in conjunction with the axial movement of the cylindrical casing body and the housing cylinder relative to the excavating cylinder. As the second arm moves, the first and second arms rotate about the first and second fixed shafts and the movable shaft, and are turned toward the inside and outside of the inner cylindrical portion to reach the retracted position or the advanced position. Can be placed.

  According to the fourth aspect of the present invention, the movement of the containing container body in the axial direction and the rotation in the circumferential direction can be guided by the guide groove and the guide member.

It is a front view which shows the pile extraction apparatus which concerns on this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. 1 (retraction position). It is a principal part enlarged view which shows the vertical and horizontal long hole, horizontal long hole, and guide pin of a drive assistance mechanism body. It is DD sectional drawing of FIG. 2 which has arrange | positioned the pile support arm body in the retracted position. It is sectional drawing which has arrange | positioned the pile support arm in the advance position. It is EE sectional drawing of FIG. 7 (advance position). It is the front view which connected the excavator and the pile removal apparatus. It is a principal part enlarged view which connected the pile punching apparatus and the excavator. It is the front view which excavated underground with the excavator and the pile removal device It is the expanded sectional view which inserted the existing pile in the inner side circle part during excavation in the ground, and was accommodated in the accommodation cylindrical body and the cylindrical casing body (retraction position). It is the figure which excavated underground with the excavator and the pile removal apparatus, Comprising: It is the front view which accommodated the existing pile in the cylindrical casing body and the cylindrical casing body for excavation. It is the principal part enlarged view which showed the position in the guide pin of the drive auxiliary mechanism body in the excavation in the ground and in taking out the existing pile. It is an expanded sectional view which arrange | positioned each pile support arm body in the advancing / retreating position, and supported the existing pile lower end with the 1st and 2nd arm. It is FF arrow sectional drawing of FIG. It is the front view which extracted the existing pile from underground with the excavator and the pile removal apparatus.

  A pile removing device according to the present invention will be described with reference to FIGS.

  In FIG. 1 thru | or FIG. 17, the pile extraction apparatus X extracts the existing pile K embed | buried (placed) in the underground Y. FIG.

  1 to 8, a pile removing device X includes a cylindrical casing body 1, a drilling cylinder body 2, a plurality of drilling bits 3, 3,..., A housing cylinder body 4, a drive assist mechanism body 5, and a plurality (a pair) of piles. Support arm bodies 6 and 6 are provided.

  The cylindrical casing body 1, the excavation cylinder body 2, and the accommodation cylinder body 4 are arranged concentrically and constitute a triple cylindrical structure M.

  As shown in FIGS. 1 to 8, the cylindrical casing body 1 extends in the axial direction A from the upper end of the excavating cylindrical body 2 and the upper end of the accommodating cylindrical body 3. The cylindrical casing body 1 is made of a metal cylinder such as iron or steel. The cylindrical casing body 1 is rotated around the axis a of the cylindrical casing body 1. The cylindrical casing body 1 is moved in the axial direction A of the cylindrical casing body 1.

The excavation cylindrical body 2 is disposed concentrically with the axis a of the cylindrical casing body 1 as shown in FIGS. The excavation cylindrical body 2 is disposed outside the cylindrical casing body 1 (outside the cylindrical casing body).
As shown in FIGS. 1 to 8, the excavation cylindrical body 2 has an outer cylindrical portion 2 </ b> A, and the outer cylindrical portion 2 </ b> A extends in the axial direction A from the lower end of the cylindrical casing body 1. The excavation cylinder 2 is made of a metal cylinder such as iron or steel.
The excavation cylindrical body 2 has a plurality of outer arm holes 2B and 2B. Each outer arm hole 2B, 2B is formed in the outer cylindrical portion 2A and opens in and out of the outer cylindrical portion 2A in the radial direction C perpendicular to the axial direction A and the circumferential direction B of the excavating cylindrical body 2. The outer arm holes 2B and 2B are arranged in the circumferential direction B at an angle of 90 degrees. Each outer arm hole 2B, 2B has a hole width h in the circumferential direction B and extends in the axial direction A.

  Each excavation bit 3, 3, ... is arrange | positioned at the excavation cylinder 2 as shown in FIG.1, FIG6 and FIG.7. Each excavation bit 3, 3,... Is attached to the lower end side of the outer cylindrical portion 2A. Each excavation bit 3, 3, ... is arrange | positioned at intervals in the circumferential direction B of 2 A of outer cylindrical parts. Each of the excavating bits 3, 3,... Protrudes in the axial direction A from the lower end of the outer cylindrical portion 2A.

As shown in FIGS. 1 to 8, the accommodating cylindrical body 4 is disposed concentrically with the axis a of the cylindrical casing body 1 (excavated cylindrical body 2). The accommodating cylindrical body 4 is disposed in the cylindrical casing body 1 (inner side).
The accommodating cylindrical body 4 has an inner cylindrical portion 4A, and the outer cylindrical portion 4A extends in the axial direction A from the lower end of the cylindrical casing body 1. The storage cylindrical body 4 extends the inner cylindrical portion 4A into the outer cylindrical portion 2A (inner side of the outer cylindrical portion 2A) in the same direction (coaxial center direction A) as the outer cylindrical portion 2A, and the existing pile K is connected to the inner cylindrical portion 4A. Insert inside. The accommodating cylinder 4 is made of a metal cylinder such as iron or steel.
The accommodating cylindrical body 4 has a plurality of inner arm holes 4B and 4B. Each inner arm hole 4B, 4B is formed in the inner cylindrical portion 4A and opens in and out of the inner cylindrical portion 4A in a radial direction C orthogonal to the axial direction A and the circumferential direction B of the inner cylindrical portion 4A. The inner arm holes 4B and 4B are arranged in the circumferential direction B at an angle of 90 degrees and are opposed to the outer arm holes 2B and 2B. Each inner arm hole 4B, 4B has the same hole width h as the outer arm hole 2B in the circumferential direction B and extends in the axial direction A as shown in FIG.
The inner arm holes 4B and 4B are arranged in parallel to the outer arm holes 4A and 4A, and communicate with the outer arm holes 2B and 2B.
Thus, the inner arm holes 4B and 4B and the outer arm holes 2B and 2B communicate with each other in the radial direction C outside (outside) the outer cylindrical portion 2A and inside (inner) the inner cylindrical portion 4A.
The accommodating cylinder 4 (including the inner cylindrical portion 4A) has a larger diameter than the existing pile K.

As shown in FIG. 1, the triple cylindrical structure M forms a single cylindrical portion M1, a double cylindrical portion M2, and a triple cylindrical portion M3 in the axial direction A.
The single cylindrical portion M1 is formed on the upper end side in the axial direction A and is on the upper end side of the cylindrical casing body 1. The double cylindrical portion M2 is formed on the lower end side in the axial direction A, and includes an outer cylindrical portion 2A of the excavating cylindrical body 2 and an inner cylindrical portion 4A of the accommodating cylindrical body 4. The triple cylindrical portion M3 is formed in the middle of the axial center direction A between the single cylindrical portion M1 and the double cylindrical portion M2, and includes the cylindrical casing body 1, the excavating cylindrical body 2, and the accommodating cylindrical body 4.

As shown in FIGS. 1 to 3 and FIGS. 5 to 7, the drive assist mechanism 5 is movable in the axial direction A with respect to the drilling cylinder 2 by integrating the cylindrical casing body 1 and the housing cylinder 4. To.
The drive assist mechanism 5 regulates the movement of the cylindrical casing body 1 and the accommodating cylindrical body 4 in the axial direction A, and the cylindrical casing body 1, the excavating cylindrical body 2 and the accommodating cylindrical body 4 are integrated around the axial center a. Make it rotatable.
The drive assist mechanism 5 is disposed in the triple cylindrical portion M3 of the triple cylindrical structure M, and includes a plurality of vertical and horizontal long holes 7, 7,..., A plurality of horizontal long holes 8, 8,. ... with.

As shown in FIG. 1 to FIG. 3, each of the vertically long holes 7, 7,... Is formed in the drilling cylinder 2 and is arranged at an angle of 45 degrees in the circumferential direction B of the drilling cylinder 2. .
Each of the vertically long holes 7, 7,... Is opened to the inside and outside (inside and outside) of the drilling cylinder 2 in the radial direction C of the drilling cylinder 2.
Each of the vertically long holes 7, 7,... 3 includes a lower horizontally long hole 10, an upper horizontally long hole 11, and a vertically long hole 12.

The lower lateral long hole 10 extends in the circumferential direction B of the excavating cylinder 2. The lower lateral long hole 10 has a hole width ha in the axial direction A of the excavating cylindrical body 2 and a hole length La in the circumferential direction B (see FIG. 5).
The upper lateral long hole 11 is disposed above the lower lateral long hole 10 with a hole interval Lb above the axial center direction A, and extends in the circumferential direction B of the excavating cylinder 2. The upper horizontal hole 11 is spaced from the lower horizontal hole 10 in the circumferential direction B by a hole interval Lb, that is, the hole end 11a of the upper horizontal hole 11 is circumferential with respect to the hole other end 10b of the lower horizontal hole 10. In B, the hole interval Lb is shifted.
The upper lateral elongated hole 11 has the same hole width ha as the lower lateral elongated hole 10 in the axial direction A, and the same hole length La as the lower lateral elongated hole 10 in the circumferential direction B (see FIG. 5).
Thus, the lower and upper lateral long holes 10 and 11 are arranged in parallel in the axial direction A with a hole interval hb, and the hole ends 10a and 11a side of the lateral long holes 10 and 11 are arranged in the axial direction A. It is arranged so as to overlap vertically.
The lower and upper lateral long holes 10 and 11 extend in opposite circumferential directions B from the hole ends 10a and 11a.

The vertically long hole 12 extends in the axial direction A of the excavating cylindrical body 2 and communicates with the hole ends 10 a and 11 a of the lower and upper lateral elongated holes 10 and 11.
Thereby, the longitudinally long hole 12 is disposed orthogonally to the lower and upper laterally elongated holes 10 and 11.
The vertically long hole 12 has the same hole width hb as the lower laterally long hole 10 in the circumferential direction B and the hole length Lb in the axial direction A (see FIG. 5).

In the above-described configuration, each of the vertical and horizontal long holes 7, 7,. In each of the vertically long holes 7, 7,..., The hole height hx in the axial direction A of the drilling cylinder 2 is hx = 2 × ha + Lb (ha: hole width of the lower and upper horizontally long holes 10, 11; Lb : The length of the vertically long hole 12).
Further, in each of the vertical and horizontal long holes 7, 7,..., The hole length Ly in the circumferential direction B is Ly = 2 × La−hb (La: hole length of the lower and upper horizontal long holes 10, 11; hb: The hole width of the vertically long hole 12).

Each horizontal hole 8, 8,. As shown in FIGS. 1 to 3, the cylindrical body 4 is formed. Each of the horizontally long holes 8, 8,... Is arranged opposite to each of the vertically long holes 7, 7,... At an angle of 45 degrees in the circumferential direction B of the containing cylindrical body 4.
Each of the horizontally elongated holes 8 is opened to the inside and outside (inside and outside) of the housing cylinder 4 in the radial direction C of the housing cylinder 4. Each of the horizontally long holes 8, 8,... Extends in the circumferential direction B of the accommodating cylindrical body 4 and extends between the other holes 10b, 11b of the lower and upper horizontally elongated holes 10, 11.
Each of the horizontally elongated holes 8, 8,... Has the same hole width ha as the lower horizontally elongated hole 10 in the axial direction A, and the same hole length Ly as the vertically elongated hole 7 in the circumferential direction B (see FIG. 5). .

As shown in FIGS. 1 to 3 and 6, the guide pins 9, 9,... Are fixed to the cylindrical casing body 1 and arranged at an angle of 45 degrees in the circumferential direction B of the cylindrical casing body 1. . Each of the guide pins 9, 9,... Protrudes in the radial direction C of the cylindrical casing body 1 toward the excavation cylindrical body 2 side and the accommodation cylindrical body 4 side.
Each of the guide pins 9,... Extends from the radial direction C of each cylindrical body 2, 4 to each of the vertically long holes 7, 7... (Upper and lower horizontal long holes 10, 11 and vertical long hole 12) and , 8,... Are slidably inserted.
As a result, the guide pins 9, 9,... Support the accommodating cylindrical body 4 on the cylindrical casing body 1 in the laterally long holes 8, 8,.

In the drive assist mechanism 5, when the guide pins 9, 9,... Are arranged at the hole ends 10 a of the lower lateral elongated holes 10, 10,. Are slidable upward in the axial direction A along. Each of the guide pins 9, 9,... Abuts on each of the horizontally long holes 8, 8,. It is possible to move upward in the axial direction a with respect to the cylindrical body 2.

In the drive assist mechanism 5, when the guide pins 9, 9,... Are arranged on the hole other end 10b side of the lower lateral elongated holes 10, 10,. Are in contact with the lower lateral long holes 10, 10,... And the horizontal long holes 8, 8,.
As a result, the drive assist mechanism 5 regulates the movement of the cylindrical casing body 1 and the cylindrical bodies 2 and 4 in the axial direction A relative to the excavating cylinder body 2.
In the drive assist mechanism 5, the guide pins 9, 9, etc. are brought into contact with the hole other ends 10 b of the lower lateral long holes 10, 10,. 1 to 3 and FIG. 6).
Thereby, the drive assist mechanism 5 makes the cylindrical casing body 1 and the cylindrical bodies 2 and 4 integrally rotatable around the axis a. The cylindrical casing body 1 and the cylindrical bodies 2 and 4 are integrated by the guide pins 9, 9,...

In the drive assist mechanism 5, when the guide pins 9, 9,... Are arranged at the hole ends 11a of the upper side horizontal holes 11, 11, ..., the guide pins 9, 9,. Along the axial direction A. The guide pins 9, 9, ... are in contact with the horizontally long holes 8, 8, ... in the axial direction A.
Thus, the drive assist mechanism 5 is configured to be slidable downward in the axial direction A with respect to the excavation cylinder 2 by integrating the cylindrical casing body 1 and the accommodation cylinder 4.

In the drive assist mechanism 5, when the guide pins 9, 9,... Are arranged on the hole other end 10b side of the upper lateral elongated holes 11, 11,. Are in contact with each of the upper lateral long holes 11, 11,... And the lateral long holes 8, 8,.
As a result, the drive assist mechanism 5 regulates the movement of the cylindrical casing body 1 and the cylindrical bodies 2 and 4 in the axial direction A relative to the excavating cylinder body 2.
Further, in the drive assist mechanism 5, each guide pin 9, 9,... Abuts on the upper lateral elongated holes 11, 11,... And the other lateral ends 11b, 8b of the lateral elongated holes 8, 8,. ).
Thereby, the drive assist mechanism 5 makes the cylindrical casing body 1 and the cylindrical bodies 2 and 4 integrally rotatable around the axis a. The cylindrical casing body 1 and the cylindrical bodies 2 and 4 are integrated by the guide pins 9, 9,... And can be rotated in the reverse direction in the circumferential direction B.

As shown in FIGS. 1, 4 and 6, the pile support arm bodies 6 and 6 are retracted outside the inner cylindrical portion 4 </ b> A in conjunction with the movement of the cylindrical casing body 1 and the accommodating cylindrical body 4 in the axial direction A. It is arranged at the position T1 (see FIGS. 1 to 6) or the advance position T2 (see FIGS. 7 and 8) in the inner cylindrical portion 4A.
Each pile support arm body 6 and 6 supports the existing pile Y lower end penetrated in the inner side cylindrical part 4 in advance position T2.
Each pile support arm body 6, 6 is disposed in the outer arm hole 2 </ b> B at an interval of 90 degrees in the circumferential direction B of the excavation cylindrical body 2.
Each pile support arm body 6, 6 includes first and second arms 15, 16, first and second fixed shafts 17, 18 and a movable shaft 19.

The first and second arms 15 and 16 are disposed at the retracted position T1 or the advanced position T2. The retracted position T1 is between the outer and inner cylindrical portions 2A and 4A and in the outer arm hole 4B. The advance position T2 is in the inner cylindrical portion 4A (inner side).
In the retracted position T1, the guide pins 9, 9,... Are arranged on the hole other end 10b side of the lower lateral elongated holes 10, 10,... (See FIGS. 1 to 5). In the advanced position T2, the guide pins 9, 9,... Are arranged on the hole other end 11b side of the upper lateral elongated holes 11, 11,... (See FIGS. 6 and 7).

As shown in FIGS. 1 and 6, the first and second fixed shafts 17 and 18 are disposed in the outer arm hole 2 </ b> B, with the shaft center positioned on a straight line L extending in the shaft center direction A.
The first and second arms 15 and 16 are arranged side by side in the circumferential direction B as shown in FIG. The 1st and 1st arms 15 and 16 consist of metal plates, such as iron and steel.

The first arm 15 has an upper end portion 15A disposed in the outer arm hole 2B. The upper end portion 15A of the first arm 15 is disposed on the upper end side in the axial direction A of the outer cylindrical portion 4A within the outer arm hole 4B.
The lower end portion 15B of the first arm 15 is arranged to be unevenly distributed on the inner cylindrical portion 4A side in the radial direction C from the upper end portion 15A of the first arm 15 at the retracted position T1.

The second arm 16 has a lower end portion 16B disposed in the outer arm hole 2B. The lower end portion 16B of the second arm 16 is disposed on the lower end side in the axial direction A in the outer arm hole 2B.
The lower end portion 16B of the second arm 16 is arranged to be unevenly distributed on the inner cylindrical portion 4A side in the radial direction C from the upper end portion 16A of the second arm 16 at the retracted position T1.
As a result, the upper end 15A of the first arm 15 and the lower end 16B of the second arm 16 are arranged with an arm interval Ax in the axial direction A in the shaft outer arm hole 2B.

The first fixed shaft 17 pivotally supports the upper end portion 15A of the first arm 15 on the outer cylindrical portion 2A of the excavating cylindrical body 2 in the outer arm hole 2B.
The second fixed shaft 18 pivotally supports the lower end portion 16B of the second arm 16 on the inner cylindrical portion 4A of the accommodating cylindrical body 4 in the outer arm hole 2B. The second fixed shaft 18 rotatably supports the lower end portion 16B of the second arm 16 on the fixing bracket 25. The fixing bracket 25 is disposed in the outer cylindrical portion 2A and the inner cylindrical portion 4A, and is fixed to the inner cylindrical portion 4A in the radial direction C of the accommodating cylindrical body 4 in the inner arm hole 4B.

The movable shaft 19 rotatably connects the lower end portion 15B of the first arm 15 and the upper end portion 16A of the second arm 16.
The movable shaft 19 is disposed closer to the inner cylindrical portion 4B than the first and first fixed shafts 17 and 18 (straight line L) at the retracted position T1.

Each pile support arm body 6, 6 is interlocked with the movement of the accommodating cylinder body 4 in the axial direction A and arranges the first and second arms 15, 16 from the retracted position T 1 to the advanced position T 2. At this time, the second arm 16 is moved upward in the axial direction A by the movement of the accommodating cylindrical body 4.
Accordingly, the first and second arms 15 and 16 are rotated about the first and second fixed shafts 17 and 18 and the movable shaft 19 and are turned toward the inner cylindrical portion 4A. The movable shaft 19, the lower end 15 </ b> B side of the first arm 15, and the upper end 16 </ b> A side of the second arm 16 are inserted into the inner arm hole 4 </ b> B and advanced into the inner cylindrical portion 4 </ b> A (inner side) of the accommodating cylindrical body 4. (See FIGS. 7 and 8).
Note that the range of the first and second arms 15 and 16 to enter the inner cylindrical portion 4 </ b> A depends on the amount of movement of the containing cylindrical body 4 in the axial direction A. Therefore, the advance range of the first and second arms 15 and 16 is determined by appropriately squeezing the hole height hx of each of the vertical and horizontal holes 7, 7,.

In addition, each of the pile supporting arm bodies 6 and 6 is arranged in conjunction with the movement of the accommodating cylindrical body 4 below the axial direction A, and the first and second arms 15 and 16 are arranged from the advanced position T2 to the retracted position T. At this time, the lower end portion 16 </ b> B of the second arm 16 is moved downward in the axial direction A by the movement of the containing cylindrical body 4.
Accordingly, the first and second arms 15 and 16 are turned around the first and second fixed shafts 17 and 18 and rotated around the movable shaft 19, so that the movable shaft 19 and the lower end portion 15 </ b> B of the first arm 15. The upper end portion 16A of the second arm 16 is disposed outside (outside) the inner cylindrical portion 4A through the inner arm hole 4B (see FIGS. 4 and 6).

As shown in FIGS. 1, 4, and 6, the pile cutting device X includes a plurality of guide grooves 51, 51,... And a plurality of guide members 52, 52,. Prepare.
The guide grooves 51, 51,... And the guide members 52, 52,... Are arranged between the outer cylindrical portion 2A and the inner cylindrical portion 4B. The guide grooves 51, 51,... And the guide members 52, 52,... Are arranged between the pile support arm bodies 6 and 6 with an interval of 45 degrees in the circumferential direction B.

  Each guide groove 51, 51,... Is arranged in one of the outer cylindrical portion 2A and the inner cylindrical portion 4A, for example, the outer cylindrical portion 2A. Each of the guide grooves 51, 51,... Opens into the outer cylindrical portion 2A and extends in the axial direction A of the outer cylindrical portion 2A. Each of the guide grooves 51, 51, ... extends between the lower end of the cylindrical casing body 1 and the lower end of the outer cylindrical portion 2A.

Each guide member 52, 52,... Is disposed on the other of the outer cylindrical portion 2A and the inner cylindrical portion 4A, for example, the inner cylindrical portion 4A.
The guide members 52, 52,... Protrude from the inner cylindrical portion 4A in the radial direction C, and are slidably fitted into the guide grooves 51, 51,.

Next, an operation of extracting the existing pile K using the pile extraction device X (hereinafter referred to as “pile extraction operation”) will be described with reference to FIGS. 1 to 17.
For convenience of explanation, the pile removing device X arranges the guide pins 9, 9,... On the hole other end 10b side in the lower lateral elongated holes 10, 10,. Is placed at the retracted position T1.
Moreover, in the pile extraction operation, the pile extraction device X1 is connected to the excavator Z and extracts the existing pile K from the underground Y using the excavator Z, as shown in FIGS.

  Hereinafter, the excavator Z will be described with reference to FIG.

  In FIG. 10, the excavator Z includes a crawler type self-propelled vehicle CK, a backstay BS, a leader support arm SA, a leader RD, a top sheep TS, a rotation driving unit 31, a drilling cylindrical casing body KT, and a movement driving unit 32. .

  The backstay BS and the leader support arm SA are disposed on the crawler type self-propelled vehicle CK, and support the reader RD in front of the crawler type self-propelled vehicle CK. The reader RD is erected on the ground GM and extends in the axial direction A. The top sheep TS is fixed to the upper end in the axial direction A of the reader RD.

  The rotation drive unit 31 is configured by, for example, an electric motor or a hydraulic motor, and is disposed in front of the reader RD. The rotation drive unit 31 is attached to the reader RD so as to be movable in the axial direction A. The driving cylindrical casing KT is disposed at the lower end in the axial direction A of the rotation driving unit 31 and is connected to the rotation driving unit 31. The rotation drive unit 31 rotates the excavating cylindrical casing body KT about the axis a (forward rotation or reverse rotation).

The movement drive unit 32 includes a suspended sheep block 33, a suspended pulley 34, a plurality of guide rollers 35 to 37, a wire 38, and a winder 39 (winch). The suspended sheep block 33 is disposed above the rotational drive unit 31 in the axial direction A and is connected to the rotational drive unit 31. The suspension pulley 33 has an axis perpendicular to the axial direction A, and is rotatably supported by the suspension sheep block 33. Each guide roller 35, 36 has an axis perpendicular to the axial direction A, and is rotatably supported by the top sheep TS. The guide roller 37 has an axis orthogonal to the axis direction A, and is rotatably supported on the leader support arm SA. The wire 38 has one end fixed to the top sheep TS, and is wound around the suspension pulley 33 from the lower end in the axial direction A. The wire 38 is guided by the guide rollers 35 to 37 and connects the other end of the wire to a winder 39 (winch).
The movement drive unit 32 winds the wire 38 with the winder 39 and moves the suspension pulley 33 and the suspension sheep block 33 upward in the axial direction A. As a result, the rotation drive unit 31 and the driving cylindrical casing body KT are also moved upward in the axial direction A.
Moreover, the movement drive part 31 returns the wire of the winder 32 to the suspension pulley 33 side, and moves the suspension sheep block 33 and the suspension pulley 34 downward in the axial direction A. As a result, the rotational drive unit 31 and the excavating cylindrical casing body KT are moved downward in the axial direction A.

In the pile extraction work, the pile extraction device X is connected to the excavator Z (see FIGS. 9 and 10).
The pile removing device X is disposed between the excavator Z and the ground GM. In the pile removing device X, the cylindrical casing body 1 is arranged concentrically with the cylindrical casing body KT for excavation. A joint mechanism 45 detachably connects the upper end side in the axial direction A of the cylindrical casing body 1 and the lower end side in the axial direction A of the cylindrical casing body KT for excavation.
Thereby, in the pile removal apparatus X, the cylindrical casing body 1 is connected to the rotation drive unit 31 via the excavation cylindrical casing body KT, and is rotated around the axis a by the rotation drive unit 31 (forward rotation or reverse rotation). Rotated).
Further, in the pile removing device X, the cylindrical casing body 1 is connected to the movement driving unit 32 via the excavating cylindrical casing body KT and the rotation driving unit 31, and is moved in the axial direction A by the movement driving unit 32. The
In the excavator Z, as shown in FIG. 10, the water supply pipe 61 is arranged outside the excavating cylindrical casing body KT and communicated with the inside cylindrical portion 4A of the pile removing device X. Water is discharged into the inner cylindrical portion 4A through the water supply pipe 16.

  Subsequently, the excavator Z travels on the crawler type self-propelled vehicle CK, and the pile removing device X is disposed on the existing pile K (see FIG. 9).

Subsequently, the rotation driving unit 31 of the excavator Z is driven to rotate the excavating cylindrical casing body KT and the cylindrical casing body 1 in the normal direction.
With the forward rotation of the cylindrical casing body 1, the guide pins 9, 9,... Of the drive assist mechanism body 5 are arranged in the lower lateral elongated holes 10, 10,. 8, slide in. As shown in FIG. 1 and FIG. 3, each guide pin 9, 9,... Has a hole other end 10b of each of the lower lateral elongated holes 10, 10,... And a hole end 8a of each of the lateral elongated holes 8, 8,. Abut.
Thereby, the cylindrical casing body 1, the excavation cylinder body 2, and the accommodation cylinder body 4 rotate positively integrally.
In the pile removing apparatus X, each guide member 52, 52,... Abuts on each guide groove 51, 51,. , 4 to guide the forward rotation.

Further, as shown in FIGS. 1 and 6, the guide pins 9, 9,...
The cylindrical casing body 1 and the accommodating cylindrical body 4 do not move in the axial direction A with respect to the excavating cylindrical body 2 by the contact of the guide pins 9,.
Thereby, the 2nd arm 16 of each pile support arm body 6 and 6 does not move to the axial center direction A, but the 1st and 2nd arms 15 and 16 are hold | maintained at retracted position T1.

Subsequently, the movement drive unit 32 of the excavator Z is driven to move the suspension sheep block 33, the suspension pulley 34, the rotation drive unit 32, the excavating cylindrical casing KT, and the cylindrical casing body 1 downward in the axial direction A. .
As the cylindrical casing body 1 moves downward in the axial direction A, the guide pins 9, 9,... Of the drive assist mechanism 5 are moved from the axial direction A of the cylindrical bodies 2, 4 to the horizontal elongated holes 10, 8. (Refer to FIG. 1, FIG. 3 and FIG. 6).
Thereby, the cylindrical casing body 1, the excavation cylinder body 2, and the accommodation cylinder body 4 move downward in the axial direction A as a whole (see FIG. 11).
Further, the guide members 52, 52, ... slide along the guide grooves 51, 51, ..., and guide the movement of the accommodating cylindrical body 4 in the axial direction A downward.

In the pile unloading device X, the cylindrical casing body 1, the excavating cylinder body 2 and the accommodating cylinder body 4 are rotated forward as a unit and moved downward in the axial direction A, so that the excavating bits 3 and 3 of the excavating cylinder body 3 Excavate underground Y at.
During excavation of the underground Y, as shown in FIGS. 11 and 12, the existing pile K is inserted through the inner cylindrical portion 4 of the accommodating cylindrical body 4, inside the accommodating cylindrical body 4, in the cylindrical casing body 1, and for excavation. It is accommodated in the cylindrical casing body KT.
During excavation of the underground Y, the pile support arm bodies 6 and 6 are held at the retracted position T outside (outside) the inner cylindrical portion 4A, as shown in FIG. 16 does not contact the existing pile K inserted through the inner cylindrical portion 4A.

During excavation of the underground Y, when the existing pile K lower end is accommodated up to the inner lower end of the cylindrical casing body 1, the rotation driving unit 31 is stopped.
Accordingly, the forward rotation of the excavating cylindrical casing body KT and the cylindrical casing body 1 is also stopped, and the excavating cylindrical body 2 and the accommodating cylindrical body 4 are also stopped.
Moreover, the movement drive part 31 is stopped.
Thereby, the excavation cylindrical casing body KT and the cylindrical casing body 1 are also stopped from moving downward in the axial direction A, and the excavation cylinder body 2 and the accommodating cylinder body 4 are also stopped.

Subsequently, the rotary drive unit 31 of the excavator Z is driven to rotate the excavating cylindrical casing body KT and the cylindrical casing body 1 in the reverse direction.
As the cylindrical casing body 1 rotates in the reverse direction, the guide pins 9, 9,... Of the drive assist mechanism body 5 are arranged in the circumferential direction B of the cylindrical bodies 2, 4 as shown in FIG. It slides in each lower side long hole 10,10, ... and each side long hole 8,8, .... And each guide pin 9, 9, ... is contact | abutted to the hole end 10a of each lower side long hole 10,10, ....
As a result, the guide pins 9, 9,... Slide along the longitudinal elongated holes 12, 12,... In the axial direction A of the cylindrical bodies 2, 4, as shown in FIG. Be free.
The drive assist mechanism 5 is configured to be movable upward in the axial direction A with respect to the excavation cylinder 2 by integrating the cylindrical casing body 1 and the accommodation cylinder 4.

Subsequently, the rotation drive unit 31 of the excavator Z is stopped, and the movement drive unit 32 is driven to suspend the sheep block 33, the suspension pulley 34, the rotation drive unit 31, the excavation cylindrical casing body KT, and the cylindrical casing body. 1 is moved upward in the axial direction A.
As the cylindrical casing body 1 moves, the guide pins 9, 9,... Of the drive assist mechanism body 5 are respectively elongated holes in the axial direction A of the excavating cylinder body 2 as shown in FIG. Slide 12, 12,. And each guide pin 9, 9, ... is contact | abutted by the hole one end 11a side of each upper side long hole 11, 11, .... The guide pins 9, 9, etc. also contact the lateral elongated holes 8, 8,... In the axial direction A of the accommodating cylindrical body 4.
As a result, the cylindrical casing body 1 and the accommodating cylindrical body 4 are moved upward in the axial direction A with respect to the excavating cylindrical body 2.
Further, the guide members 51, 51, ... slide along the guide grooves 52, 52, ..., and guide the movement of the containing cylindrical body 4 in the axial direction A upward.

In conjunction with the movement of the cylindrical casing body 1 and the accommodating cylindrical body 4, the second arms 16 of the pile support arm bodies 6 and 6 are moved upward in the axial direction A.
As the second arms 16 and 16 move, the first and second arms 15 and 16 of the pile support arm bodies 6 and 6 rotate around the first and second fixed shafts 17 and 18 and around the movable shaft 19. And is turned toward the inner cylindrical portion 4B of the accommodating cylindrical body 4.
In each pile support arm body 6, 6, the first and second arms 15, 16 are inserted into the inner arm hole 4 </ b> B and advanced into the inner cylindrical portion 4 </ b> A (inner side) as shown in FIGS. 15 and 16. To do.
The lower end portion 15B side of the first arm 15, the upper end portion 16A side of the second arm 16 and the movable shaft 19 are advanced into the inner cylindrical portion 4B, and the pile support arm bodies 6 and 6 are disposed at the advanced position T2 (see FIG. 7 and FIG. 8).

Subsequently, the movement drive unit 32 of the excavator Z is stopped, and the rotation drive unit 32 is driven to reversely rotate the excavating cylindrical casing body KT and the cylindrical casing body 1.
As the cylindrical casing body 1 rotates in the reverse direction, the guide pins 9, 9,... Of the drive assist mechanism body 5 are arranged in the upper elongated holes 11, 11,. And slide in each of the horizontally elongated holes 8, 8,. And each guide pin 9,9, ... contact | abuts to the hole other end 11b, 8b of upper side oblong hole 11, 11, ... and each oblong 8,8, ....
Thereby, the cylindrical casing body 1, the excavation cylinder body 2, and the accommodation cylinder body 4 are reversely rotated together.

Further, as shown in FIG. 15, the guide pins 9, 9,... Abut on the lateral elongated holes 11, 8 from the axial direction A of the cylindrical bodies 2, 4.
The cylindrical casing body 1 and the accommodating cylindrical body 4 do not move together in the axial direction A with respect to the excavating cylindrical body 2 by the contact of the respective guide pins 9,.
Thereby, the 1st and 2nd arms 15 and 16 are hold | maintained to the advance position T2, without the 2nd arm 16 of each pile supporting arm body 6 and 6 moving to the axial direction A.

Subsequently, the movement drive unit of the excavator Z is driven to move the suspension sheep block 33, the suspension pulley 34, the rotation drive unit 31, the excavation cylindrical casing body KT, and the cylindrical casing body 1 upward in the axial direction A. (See Figure 17)
Along with the movement in the axial direction A upward, each pile support arm body 6, 6 at the advance position T <b> 2 is provided on the existing pile K on the lower end portion 15 </ b> B side of the first arm 15 and the upper end portion 16 </ b> A side of the second arm 16. The lower end is supported (see FIGS. 15 and 16).
Accordingly, the cylindrical casing body 1, the excavating cylinder body 2 and the accommodating cylinder body 4 of the pile removing device X, the excavating cylinder casing body 57 for excavating machine Z are rotated in the reverse direction and moved upward in the axial direction A, Remove the existing pile K from the ground Y.

When the existing pile K is extracted, the rotation drive unit 31 of the excavator Z is driven, and the drive side cylindrical casing body KT and the cylindrical casing body 1 are rotated forward.
As the cylindrical casing body 1 rotates in the forward direction, the guide pins 9, 9,... Of the drive assisting mechanism body 5 are connected to the upper oblong holes 11, 11 in the circumferential direction B as shown in FIG. ,... And slide inside each of the elongated holes 8, 8,. And each guide pin 9,9, ... is contact | abutted to the hole end 11a of each horizontally long hole 11,8.
As a result, the guide pins 9, 9,... Slide along the longitudinal elongated holes 8, 8,... In the axial direction A of the cylindrical bodies 2, 4, as shown in FIG. Be free.

Subsequently, the rotation drive unit 31 of the excavator Z is stopped, and the movement drive unit 32 is driven to suspend the sheep block 33, the suspension pulley 34, the rotation drive unit 31, the driving cylindrical casing body KT, and the cylindrical casing body. 1 is moved downward in the axial direction A.
As the cylindrical casing body 1 moves, the guide pins 9, 9,... Of the drive assisting mechanism I5 are arranged in the longitudinally long holes 12 in the axial direction A of the excavating cylinder body 2 as shown in FIG. , 12,... And each guide pin 9,9, ... is contact | abutted by the hole end 10A side of each lower side long hole 10,10, .... The guide pins 9, 9, etc. also contact the lateral elongated holes 8, 8,... In the axial direction A of the accommodating cylindrical body 4.
As a result, the cylindrical casing body 1 and the accommodating cylindrical body 4 are moved integrally with respect to the drilling cylindrical body 2 downward in the axial direction A.

In conjunction with the movement of the cylindrical casing body 1 and the accommodating cylindrical body 4, the second arms 16 of the pile support arm bodies 6 and 6 are moved downward in the axial direction A.
As the second arms 16 and 16 move, the first and second arms 15 and 16 of the pile support arm bodies 6 and 6 rotate around the first and second fixed shafts 17 and 18 and around the movable shaft 19. Is rotated toward the outside (outside) of the inner cylindrical portion 4A.
In each pile support arm body 6, 6, the first and second arms 15, 16 are inserted through the inner arm hole 4 </ b> B as shown in FIG. 1, FIG. 3, and FIG. ) And is disposed at the retracted position T1.
Thereby, the existing pile K is taken out from the inner cylindrical part 4A lower end to the pile removal apparatus X outer side.

  In the pile removing device X, a configuration in which each of the vertically long holes 7, 7,... Is formed in the accommodating cylinder 4 and each of the horizontally long holes 8, 8,.

  In the pile cutting device X, a configuration for rotating and moving the cylindrical casing body 1 by preparing a rotation driving unit and a movement driving unit dedicated to the pile cutting device X without using the excavator Z can also be adopted. The rotation drive unit is constituted by an electric motor, a hydraulic motor, or the like, and is connected to the upper end of the cylindrical casing body. The movement drive unit is composed of a hydraulic cylinder or the like and is connected to the rotation drive unit.

  The present invention is most suitable for extracting existing piles buried in the ground.

X Pile removal device Y Underground Z Excavator K Existing pile 1 Cylindrical casing body 2 Excavation cylinder body 2A Outer cylinder section 3 Excavation bit 4 Housing cylinder body 4A Inner cylinder section 5 Drive auxiliary mechanism body 6 Pile support arm body

Claims (4)

A cylindrical casing body rotated about an axis and moved in the axial direction;
A drilling cylinder disposed concentrically outside the cylindrical casing body and extending an outer cylindrical portion in the axial direction from the lower end of the cylindrical casing body;
An accommodating cylinder that is concentrically disposed within the cylindrical casing, extends an inner cylindrical portion into the outer cylindrical portion from the lower end of the cylindrical casing body, and inserts an existing pile into the inner cylindrical portion;
The cylindrical casing body and the accommodating cylindrical body are integrally movable in the axial direction, or the movement of the cylindrical casing body and the accommodating cylindrical body is restricted, and the cylindrical casing body and each cylindrical body are integrally formed. A drive assist mechanism that is rotatable about the axis; and
In conjunction with the movement of the cylindrical casing body and the accommodating cylindrical body, the existing casing is disposed at the retracted position outside the inner cylindrical portion or at the advanced position in the inner cylindrical portion, and is inserted into the inner cylindrical portion at the advanced position. A pile support arm for supporting the lower end of the pile;
A pile removing device characterized by comprising: The drive assist mechanism is
A lower lateral long hole formed in the drilling cylinder and extending in a circumferential direction of the drilling cylinder;
An upper horizontal hole formed in the drilling cylinder, arranged in parallel with the lower horizontal hole at an interval in the circumferential direction and the axial direction, and extending in the circumferential direction;
A vertically elongated hole formed in the drilling cylinder, extending in the axial direction and communicating with one end of the adjacent upper and lower lateral elongated holes;
A laterally elongated hole formed in the accommodating cylindrical body and extending across the other end of the upper and lower laterally elongated holes in the circumferential direction of the accommodating cylindrical body;
A guide pin fixed to the cylindrical casing body and slidably inserted through the elongated holes from a direction perpendicular to the axial direction and the circumferential direction;
With
The guide pin is
The pile removing device according to claim 1, wherein the pile removing device is located in the lower lateral long hole at the retracted position, and is located in the upper lateral long hole at the advanced position. The pile support arm body is:
First and second arms disposed outside the inner cylindrical portion at the retracted position and disposed within the inner cylindrical portion at the advanced position;
A first fixed shaft that rotatably supports the upper end portion of the first arm on the drilling cylinder outside the inner cylindrical portion;
A second fixed shaft that rotatably supports the lower end portion of the second arm on the storage cylindrical body outside the inner cylindrical portion;
A movable shaft that rotatably connects the lower end of the first arm and the upper end of the second arm;
With
The movable shaft is
The pile removing device according to claim 1 or 2, wherein the pile removing device is arranged to be unevenly distributed on the inner cylindrical portion side with respect to each fixed shaft at the retracted position. A guide groove and a guide member which are arranged between the outer cylindrical portion and the inner cylindrical portion and guide the movement and rotation of the accommodating cylindrical body;
The guide groove is
Arranged in one of the outer cylindrical part or the inner cylindrical part, extending in the axial direction,
The guide member is
The pile removing device according to any one of claims 1 to 3, wherein the pile removing device is disposed on the other of the outer cylindrical portion or the inner cylindrical portion and is slidably fitted into the guide groove.

Images