JP4712547B2 - Attachment for columnar body extraction and columnar body extraction machine - Google Patents

Description

  The present invention relates to an attachment for pulling out a columnar body such as an electric pole or a pile, and a columnar body extracting machine using the attachment, and particularly relates to a suitable one when there is an operation obstacle in the upper part.

  The utility poles that support the overhead wires need to be replaced when they become obsolete. For this reason, conventionally, for example, a hydraulic excavator as shown in Patent Document 1 is used to excavate the surroundings of the utility pole, perform ground cutting, and pull out the utility pole.

Japanese Patent Laid-Open No. 2002-70060

  When excavating around a utility pole using a hydraulic excavator and cutting out the utility pole and installing a new utility pole as in the past, the amount of earth and sand to be excavated and re-embedded is large, and the work is long. It takes time and effort. And when such a long time is required, it is a harsh work that is urgent if work must be completed in a few hours from the last train to the first train, such as replacing a power pole of a railway. It becomes. In addition, when the base part of the utility pole is inserted into a cylindrical concrete support embedded in the ground, it is difficult to perform ground cutting with a hydraulic excavator.

  Therefore, it is conceivable that a casing having an excavation bit at the lower end is extrapolated to a utility pole by a crane instead of such a hydraulic excavator, the casing is rotated by a motor to perform ground cutting, and then the utility pole is pulled out. However, when such a casing is used, the apparatus becomes large and the overhead wire becomes an obstacle, so it is necessary to remove the overhead wire and perform the work, and after the work is accommodated, it is necessary to perform the work of extending the overhead wire. There is a problem that work takes time.

  In view of the above problems, an object of the present invention is to provide a columnar body pulling attachment and a columnar body pulling machine that can be configured in a relatively small size and can pull out a columnar body in a short time.

An attachment for pulling out the columnar body according to claim 1 is a vertically long guide device attached to a work machine,
A columnar body gripping device that is lifted and lowered by a driving device along the guide device and a ground cutting device,
The gripping device and the ground cutting device can take in and take out the columnar body from the lateral direction in an open state between the frames forming a halved structure that can be opened and closed,
The ground cutting device includes the frame that is coupled and separated in a half-divided shape, a motor that is attached to one or both of the two frames, and a half-divided shape that is rotationally driven by the motor and coupled and separated And a halved cylindrical body attached to each of the rotating bodies, projecting downward from the frame, and provided with a drilling bit at the lower end.

The columnar body pulling attachment according to claim 2 is the columnar body pulling attachment according to claim 1,
The cylindrical body is composed of two split outer cylinders that are split in half, and a split inner cylinder that is combined in the lower part of the split outer cylinder and has a split split inner cylinder in which a drilling bit is disposed at the lower end.
The divided outer cylinder and the divided inner cylinder are characterized in that, in the combined state, the positions of the butted portions of the divided outer cylinders and the butted portions of the divided inner cylinders are different in the circumferential direction.

The columnar body pulling attachment according to claim 3 is the columnar body pulling attachment according to claim 2,
The split outer cylinder has a protruding portion at the same position of the inner surface of the mutual butting portion at the lower part thereof,
The split inner cylinder has a groove for simultaneously inserting the protruding portions respectively provided in the butted portions in a state where the two split outer cylinders are combined,
The groove includes an introduction groove provided vertically from the upper side of the divided inner cylinder, a horizontal groove provided laterally from the inner end of the introduction groove, and a vertical groove provided downward from the inner end of the retaining groove. It consists of a groove.

The columnar body pulling attachment according to claim 4 is the columnar body pulling attachment according to claim 2 or 3,
A projecting portion projecting in the circumferential direction is provided on one of the butted portions of the split inner cylinder, and a recess is provided on the other. The projecting portion and the recess of one split inner cylinder are respectively provided as a recess and a projecting portion on the other split inner cylinder. It is characterized by combining the divided inner cylinders by fitting with each other.

  A columnar body extracting machine according to claim 5 is characterized in that the columnar body extracting attachment according to any one of claims 1 to 4 is attached to a work arm having a multi-joint structure of a self-propelled working machine. To do.

  When pulling out the columnar body using the columnar body pulling attachment according to the first aspect of the invention, the columnar body grounding device and the gripping device are opened, and the ground cutting including the half-divided cylindrical body outside the columnar body Mount the device, close it, and drive the motor of the earthing device to drive down the cylinder along with the rotating body of the earthing device and lower it along the guide device, so that the base part of the columnar body is grounded. Do. After performing the ground cutting, the columnar body can be pulled out by gripping the columnar body with the gripping device and pulling up the gripping device along the guide device.

  In this way, the ground cutting device or cylinder is extrapolated to the middle part of the columnar body to perform ground cutting, and the middle part of the columnar body can be gripped and pulled out by the gripping device, so the device is made compact it can. Further, since the columnar body is pulled out by grasping the middle part of the columnar body, the electric pole can be pulled out in a short time without removing the overhead line when pulling out the power pole for supporting the overhead line of the railway.

  Further, since the ground cutting is performed by the excavation bit provided at the lower end of the cylindrical body, there is almost no amount of earth and sand excavated and embedded by the ground cutting, and the columnar body can be pulled out in a short time.

  According to the invention of claim 2, the cylindrical body is divided into two halved split outer cylinders, and is combined with the lower part thereof to join the split outer cylinders. Since the divided outer cylinder and the divided inner cylinder are different from each other in the joined state, the butted portions of the divided outer cylinders and the circumferential positions of the butted portions of the divided inner cylinders are different. The divided outer cylinder is fastened by the divided inner cylinder without opening the interval between the divided outer cylinders. Conversely, the split inner cylinder is fastened by the fastened split outer cylinder, and this combined structure provides a strong coupling structure of the split outer cylinder and the split inner cylinder.

  According to the invention of claim 3, since the split outer cylinder is provided with a lateral groove between the introduction groove provided in the split inner cylinder and the internal vertical groove, the split outer cylinder is divided along with the vertical movement of the split outer cylinder. The inner cylinder can also be moved up and down. Moreover, the rotational force of the division | segmentation outer cylinder of the normal / reverse direction is transmitted to a division | segmentation inner cylinder by fitting with a protrusion part and a vertical groove.

  In this way, this structure is a structure that can be coupled and separated without using fasteners between the split outer cylinder and the split inner cylinder such as bolts and pins. For this reason, coupling | bonding and isolation | separation with a division | segmentation outer cylinder and a division | segmentation outer cylinder become easy. Further, since a fastener such as a bolt is not required, the fastener does not protrude from the excavation range in the radial direction by the excavation bit, excavation resistance is small, and there is no fear of damage to the fastener.

  According to the invention of claim 4, since the butt portions of the divided inner cylinders are concavo-convexly fitted, relative vertical movement of the divided inner cylinders is prevented, and the combination of the divided inner cylinders becomes strong.

  Since the columnar body extracting machine according to claim 5 is configured by attaching the columnar body extracting attachment according to any one of claims 1 to 4 to the work arm of the multi-joint structure of the self-propelled working machine, the guide device Can be easily controlled.

  FIG. 1 is a side view showing an embodiment of a columnar body drawing machine of the present invention. The columnar body pulling machine 1 of this embodiment uses a hydraulic excavator as a base machine, and shows a case where a power pole of a railway is pulled out. The columnar body extracting machine 1 of this embodiment shows an example in which the columnar body extracting machine 1 is mounted and used on a carriage 3 that travels on a rail 2 by self-propelling or towing. In addition, this columnar body extracting machine 1 has a crawler type traveling body 4 having an iron wheel that can travel on the rail 2, or provided with an iron wheel for traveling on the rail 2 separately from the crawler type traveling body 4. It may be provided separately.

  The columnar body extracting machine 1 of the present embodiment has a revolving body 6 installed on a traveling body 4 via a revolving device 5, and a driver's cab 7, a power unit 8, etc. are mounted on the revolving body 6, and a multi-joint A work arm 9 having a structure is attached, and a columnar body pulling attachment 10 is attached to the tip of the work arm 9.

  The working arm 9 includes a boom 12 attached to the swing body 6 by a boom cylinder 11 so as to be raised and lowered, an arm 14 attached to the boom 12 so as to be rotatable by an arm cylinder 13, and a bucket in the case of a hydraulic excavator. And a hydraulic cylinder 15 used as a hydraulic cylinder rotated. A columnar body pulling attachment 10 including a bracket 16 rotated by the hydraulic cylinder 15 is attached to the tip of the arm 14. In the present embodiment, the arm cylinder 13 is attached to the lower surface of the boom 12 in order to prevent the arm cylinder 13 from protruding upward so as to prevent interference due to overhead wires.

  Reference numeral 17 denotes a utility pole that supports an overhead wire (not shown) via a support member 18, and 19 denotes a connecting member that connects between the two utility poles 17 that are opposed to each other with the rail 2 interposed therebetween. Unlinks the utility pole 17 and the connecting member 19. Reference numeral 20 denotes a concrete molded body embedded in the ground to support the root portion of the utility pole 17, the lower portion 20a is formed solid, the upper portion 20b is formed in a cylindrical shape, and the root portion of the utility pole 17 is formed therein. Is inserted, and earth and sand 21 (see FIG. 14) is filled between the utility pole 17 and the inner wall of the tubular portion 20b.

  FIG. 2 is an enlarged view of the attachment 10, and 23 is a guide device for the attachment 10. The guide device 23 can be raised and lowered or the inclination angle in the front-rear direction can be adjusted by rotating the bracket 16 by expansion and contraction of the hydraulic cylinder 15. The guide device 23 can be turned left and right by extending and contracting the hydraulic cylinder 25 about a shaft 24 provided on the bracket 16, and the left and right inclination angles of the guide device 23 can be adjusted.

  26 is a columnar gripping device, and 27 is a ground cutting device. These are coupled to each other and are mounted so as to be movable up and down along the left and right guide rails 29 of the guide device 23. Reference numeral 30 denotes a hydraulic cylinder provided as a drive device for raising and lowering the gripping device 26 and the ground cutting device 27. In place of the hydraulic cylinder, a lifting device such as a motor, a chain, a rack, or a pinion method can be used.

  FIG. 3 is a plan view showing the configuration of the gripping device 26. The gripping device 26 includes a pair of half-arc-shaped frames 33 and 34 that are coupled to each other so as to be openable and closable around a pivot shaft 31 and whose open ends are coupled by pins 32. In a state where these frames 33 and 34 are opened, the interval between the tips of the frames 33 and 34 is set larger than the outer diameter of the electric pole 17 to be grasped. A chuck band 35 is attached to each of the frames 33 and 34 so as to be able to project from the inner peripheral side of the frames 33 and 34 so as to be rotatable about a pin 36. These chuck bands 35 are rotated by hydraulic cylinders 37 attached to the frames 33 and 34 so that the utility poles 17 can be gripped and released.

  4 and 5 are plan views showing the ground cutting device 27 in an opened state and a closed state, respectively, and FIG. 6 is a longitudinal sectional view. Reference numeral 39 denotes a bracket having an engaging groove 40 that slides along the guide rail 29. A pair of semi-circular frames 43 and 44 having a semicircular arc shape centering on pivoting shafts 41 and 42 are attached to the bracket 39 so as to be openable and closable by hydraulic cylinders 45 and 46 which are opening and closing drive devices. These frames 43 and 44 have a U-shaped cross section with an inner peripheral side opened. Further, these frames 43 and 44 can be coupled between the tips thereof in a closed state as shown in FIG. 5 by coupling a pin 47 and a pin receiver 48 having its retaining means.

  In FIG. 6, reference numerals 49 and 50 denote external gears mounted as rotating bodies on the inner peripheral sides of the frames 43 and 44, respectively. These external gears 49 and 50 have a halved structure and a U-shaped cross-sectional structure with an inner peripheral surface opened. The external gears 49 and 50 are supported by fitting bearings 51 and 52 attached to the lower plates 43a and 44a of the frames 43 and 44 in the inner space on the inner peripheral side thereof. These bearings 51 and 52 have vertical and horizontal rollers. These external gears 49 and 50 are also supported by bearings 53 and 54 attached to the lower plates 43a and 44a. Further, driving motors 55 and 56 are installed on one of the frames 43 and 44 or on the upper surfaces of both as in the illustrated example. Then, the pinions 57 and 58 attached to the output shaft are engaged with the external gears 49 and 50.

  On the top surfaces of the external gears 49 and 50, half-shaped flanges 63 and 64, which are integrally fixed to the half-shaped half cylinders 61 and 62 by welding or the like, are fixed by bolts 60, respectively.

  Reference numerals 65 and 66 denote divided outer cylinders for ground cutting, and these divided outer cylinders 65 and 66 also form a half arc shape. Flange 67 and 68 are provided on the outer periphery of the upper ends of these divided outer cylinders 65 and 66. Then, the split outer cylinders 65 and 66 are brought into contact with the inner circumferences of the cylinders 61 and 62, and the flanges 67 and 68 are placed on the flanges 63 and 64 integral with the half cylinders 61 and 62 by a bolt 69. Fix it.

  Reference numerals 70 and 71 denote pin receivers provided on the lower portions of the outer circumferences of the half cylinders 61 and 62, and reference numerals 72 and 73 denote fixed pins that are fitted and detached from these pin receivers, respectively. The fixing pins 72 and 73 are fitted into the pin receivers 70 and 71 by a driving device such as a solenoid and a driving cylinder attached to the housings 74 and 75 or by manually projecting the fixing pins 72 and 73. Is fixed to the frames 43 and 44.

  In order to align the frames 43, 44 and the half cylinders 61, 62 in the circumferential direction, a switch such as a limit switch for detecting the position of the half cylinders 61, 62 is attached to one or both of the frames 43, 44. The half cylinders 61 and 62 are provided with an operating body such as a striker for operating the switch, but the illustration is omitted.

  As shown in FIGS. 7 and 8, the inner surfaces of the mutual abutting portions 65a and 66a of the divided outer cylinders 65 and 66 are divided inner cylinders 77 and 78 when the divided outer cylinders 65 and 66 are combined. 9 to FIG. 12), which have protrusions 79 and 80 to be combined with grooves 81 to 83 described later.

  On the other hand, as shown in FIG. 9, the divided inner cylinders 77 and 78 are also halved arcuate cylinders, and have a shorter length than the divided outer cylinders 65 and 66. Further, as shown in FIGS. 10 and 11, projecting edges 77a and 78a projecting outward are provided at the lower end. Further, as shown in FIGS. 11 and 12, a drill bit 86 is provided at the lower ends of the divided inner cylinders 77 and 78.

  Further, the split inner cylinders 77 and 78 have grooves that are inserted simultaneously in a state where the projecting portions 79 and 80 are combined. As shown in FIG. 10, the groove includes an introduction groove 81 provided vertically from the upper side of the divided inner cylinders 77, 78, a transverse groove 82 provided laterally from the inner end of the introduction groove 81, and the transverse groove. And a vertical groove 83 provided downward from the inner end of 82.

  Further, as shown in FIG. 10, a protruding portion 84 protruding in the circumferential direction is provided on one of the butted portions of the divided inner cylinders 77 and 78, and a concave portion 85 is provided on the other, whereby one divided inner cylinder 77 (78). The projecting portion 84 and the recessed portion 85 are fitted into the recessed portion 85 and the projecting portion 84 of the other divided inner cylinder 78 (77), respectively, so that the divided inner cylinders 77 and 78 are combined.

  When the utility pole 17 is pulled out using the columnar body pulling machine 1, the gripping device 26 and the ground cutting device 27 are opened, and the hydraulic cylinder 30 is extended to raise the gripping device 26 and the ground cutting device 27. deep. The position and posture of the guide device 23 are adjusted by traveling on the rail 2 of the carriage 3 of the columnar body extracting machine 1, turning the turning body 6, operating the work arm 9, and operating the hydraulic cylinder 26. In addition, the utility pole 17 can be wrapped with the ground cutting device 27.

  Then, the frames 43 and 44 of the ground cutting device 27 are connected to each other by a pin 47. Further, the frames 33 and 34 of the gripping device 26 are also coupled by the coupling pin 32. Further, the projecting portions 79 and 80 of the divided outer cylinders 65 and 66 are simultaneously fitted in the grooves 81, 82 and 83 of the divided inner cylinders 77 and 78 in this order, and as shown in FIG. The abutting portions 65a and 66a of 66 are coupled so as not to open, and the utility pole 17 is surrounded.

  The division outer cylinders 65 and 66 are fitted to the division inner cylinders 77 and 78 in a state where the guide device 23 is pulled up by the operation of the work arm 9 and the division inner cylinder 77 is formed in a portion near the ground of the utility pole 17. , 78 are set in a combined state, and then the divided outer cylinders 65, 66 are lowered together with the guide device 23 by the operation of the working arm 9, and fitted into the divided inner cylinders 77, 78, and the divided outer cylinders 65, 66 are fitted. 13 and manual operation of the split inner cylinders 77 and 78, the combined state shown in FIG.

  Next, the fixing pins 72 and 73 shown in FIG. 6 are removed from the pin receivers 70 and 71, and the hydraulic cylinder 30 is contracted while rotating the motors 55 and 56 of the ground cutting device 27, thereby Cut the ground. In this excavation operation, the semicircular arc-shaped external gears 49 and 50 rotate together with the divided outer cylinders 65 and 66 and the divided inner cylinders 77 and 78 in the frames 43 and 44 while being supported by the bearings 51 to 54. . FIG. 14 shows a state where the earth and sand 21 around the utility pole 17 is excavated to the vicinity of the lowermost part of the utility pole 17 by the ground cutting. By such ground cutting, the fixing by the friction between the utility pole 17 and the ground is released, and the drawing is facilitated.

  After performing the ground cutting in this manner, in the gripping device 26 shown in FIG. 3, the hydraulic cylinder 37 is extended, the electric pole 17 is gripped by the chuck band 35, and the hydraulic cylinder 30 is extended, whereby the electric pole 17 is pulled out. . The pulled-out utility pole 17 opens the chuck band 35 to release the restraint of the utility pole 17 and mounts the utility pole 17 pulled out by another truck or the like with another crane or the like, and the new utility pole is set up by the crane.

  After the utility pole is pulled out, the ground cutting device 17 can be opened to pull out a new utility pole. In order to allow the ground cutting device 27 to be opened in this way, a work mode and an end mode are set in the control devices of the motors 55 and 56, and the external gears 49 and 50 are set in the end mode. The rotation of the motors 55 and 56 is stopped by the output of the position detection switch for setting the rotation position. When the rotation is stopped, the external gears 49 and 50 are set in advance so as to be accommodated only in the frames 43 and 44, respectively. It is possible to open to the state shown in FIG.

  Thus, if the attachment for pulling out the columnar body of the present invention is used, a half-cut cylindrical body such as the ground cutting device 27 or the split outer cylinder 45, 46 is extrapolated to the middle part of the electric pole 17, and the ground is cut. In addition, since the intermediate portion of the columnar body can be gripped and pulled out by the gripping device 26, the device can be configured without increasing the scale as compared with those using a non-divided casing. Moreover, since the middle part of the utility pole 17 is grasped and pulled out, when the utility pole 17 for supporting a railway overhead line is pulled out as in this embodiment, the utility pole can be pulled out without removing the overhead line.

  Further, since the excavation bit 86 provided at the lower ends of the divided inner cylinders 77 and 78 is used, there is almost no amount of earth and sand excavated and embedded by ground cutting, and the utility pole 17 can be pulled out in a short time.

  When practicing the present invention, the split inner cylinders 77 and 78 are not provided, the drilling bit 86 is provided at the lower end of the split outer cylinders 65 and 66, and the split outer cylinders 65 and 66 are provided with fasteners such as rings. It is good. However, as in the present embodiment, the cylinder is combined with two split outer cylinders 65 and 66, which are divided in half, to join the divided outer cylinders, and a drilling bit 86 is provided at the lower end. The split outer cylinders 65, 66 and the split inner cylinders 77, 78 are respectively connected to the butted portions 65a, 66a of the split outer cylinders 65, 66 in the coupled state. Since the circumferential positions of the butted portions of the divided inner cylinders 77 and 78 are made different from each other, the divided inner cylinders 77 are not spaced apart from each other and without using a bolt or the like. , 78 fasten the split outer cylinders 65, 66. On the other hand, since the divided inner cylinders 77 and 78 are fastened by the divided outer cylinders 65 and 66 to be fastened, by this combined structure, a strong coupling structure by the divided outer cylinders 65 and 66 and the divided inner cylinders 77 and 78 is achieved. Is obtained.

  Further, in the present embodiment, since the split outer cylinders 65 and 66 are provided with the lateral grooves 82 between the introduction grooves 81 provided in the split inner cylinders 77 and 78 and the internal vertical grooves 83, the split outer cylinders are provided. With the vertical movement of 65, 66, the split inner cylinder 77.78 can also be moved up and down. Further, the rotational force in the forward / reverse direction of the split outer cylinder 65.66 is transmitted to the split inner cylinders 77 and 78 by the fitting between the projecting portions 79 and 80 and the vertical groove 83.

  In this way, this structure is a structure that can be coupled and separated without using fasteners between the split outer cylinder and the split inner cylinder such as bolts and pins. For this reason, the split outer cylinders 65 and 66 and the split outer cylinders 77 and 78 can be easily coupled and separated. Further, since a fastener such as a bolt is unnecessary, the fastener does not protrude from the excavation range in the radial direction by the excavation bit 86, excavation resistance is small, and there is no fear of breakage of the fastener.

  Further, in the present embodiment, since the butted portions of the split inner cylinders 77 and 78 are unevenly fitted by the protruding portion 84 and the concave portion 85, the relative vertical movement of the split inner cylinders 77 and 78 is prevented. Thus, the combination of the divided inner cylinders becomes strong.

  In addition, since the pulling attachment is attached to the multi-joint working arm of the self-propelled working machine, the posture control of the guide device and the like can be easily performed.

  The present invention can be used not only for pulling out a utility pole but also for ground cutting and withdrawal of other poles and piles having different uses.

It is a side view which shows one Embodiment of the columnar body extraction machine by this invention in a working state. It is a principal part enlarged view of FIG. It is a top view of the holding | gripping apparatus of this Embodiment. It is a top view shown in the state where the ground cutting device of this embodiment was opened. It is a top view shown in the state where the ground cutting device of this embodiment was closed. It is a longitudinal cross-sectional view of the ground cutting apparatus of this Embodiment. It is a top view which shows the division | segmentation outer cylinder which comprises the ground cutting apparatus of this Embodiment. FIG. 8 is a side view of FIG. 7. It is a top view of the division | segmentation inner cylinder which comprises the ground cutting apparatus of this Embodiment. FIG. 10 is a side development view of the divided inner cylinder of FIG. 9. It is sectional drawing which shows the lower part of the division | segmentation inner cylinder of this Embodiment. It is a bottom view of the division | segmentation inner cylinder of this Embodiment. It is a side view which shows the combined state of the division | segmentation outer cylinder and division | segmentation inner cylinder of this Embodiment. It is side surface sectional drawing which shows the excavation state of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Columnar body extracting machine, 2: Rail, 3: Cart, 4: Crawler type traveling body, 5: Turning device, 6: Turning body, 7: Driver's cab, 8: Power unit, 9: Working arm, 10: Columnar shape Attachment for body extraction, 11: boom cylinder, 12: boom, 13: arm cylinder, 14: arm, 15: hydraulic cylinder, 16: bracket, 17: utility pole, 19: connecting member, 20: concrete molded body, 21: earth and sand , 23: guide device, 24: shaft, 25: hydraulic cylinder, 26: gripping device, 27: ground cutting device, 29: guide rail, 30: hydraulic cylinder, 31: pivot shaft, 32: pin, 33, 34: Frame, 35: Chuck band, 36: Pin, 37: Hydraulic cylinder, 39: Bracket, 40: Engaging groove, 41, 42: Pivoting shaft, 43, 44: Frame, 45, 46: Pressure cylinder, 47: pin, 48: pin receiver, 49, 50: external gear, 51-54: bearing, 55, 56: motor, 57, 58: pinion, 60: bolt, 61, 62: half cylinder, 63, 64: flange, 65, 66: split outer cylinder, 67, 68: flange, 69: bolt, 70, 71: pin receiver, 72, 73: fixed pin, 74, 75: housing, 77, 78: in split Cylinder, 77a, 78a: projecting edge, 79, 80: projecting part, 81: introduction groove, 82: transverse groove, 83: longitudinal groove, 84: projecting part, 85: recessed part, 86: excavation bit

Claims (5)

A vertically long guide device mounted on the work machine;
A columnar body gripping device that is lifted and lowered by a driving device along the guide device and a ground cutting device,
The gripping device and the ground cutting device can take in and take out the columnar body from the lateral direction in an open state between the frames forming a halved structure that can be opened and closed,
The ground cutting device includes the frame that is combined and separated in a half-divided shape, a motor that is attached to one or both of the two frames, and a half-divided shape that is rotationally driven by the motor and coupled and separated. A columnar body pulling attachment comprising: a rotating body; and a half-divided cylindrical body attached to each rotating body, projecting downward from the frame, and having a drilling bit disposed at a lower end. . In the attachment for pulling out the columnar body according to claim 1,
The cylindrical body is composed of two split outer cylinders that are split in half, and a split inner cylinder that is combined in the lower part of the split outer cylinder and has a split split inner cylinder in which a drilling bit is disposed at the lower end.
An attachment for pulling out a columnar body, wherein the divided outer cylinder and the divided inner cylinder are different from each other in a circumferential position of a butted portion between the divided outer cylinders and a butted portion between the divided inner cylinders in a coupled state. In the attachment for pulling out the columnar body according to claim 2,
The split outer cylinder has a protruding portion at the same position of the inner surface of the mutual butting portion at the lower part thereof,
The split inner cylinder has a groove for simultaneously inserting the protruding portions respectively provided at the butted portions in a state where the two split outer cylinders are combined,
The groove includes an introduction groove provided vertically from the upper side of the divided inner cylinder, a horizontal groove provided laterally from the inner end of the introduction groove, and a vertical groove provided downward from the inner end of the retaining groove. A columnar body pulling attachment characterized by comprising a groove. In the attachment for pulling out the columnar body according to claim 2 or 3,
One of the butted parts of the divided inner cylinder is provided with a protruding part protruding in the circumferential direction, and the other is provided with a recessed part. An attachment for pulling out a columnar body, characterized in that the inner cylinders are combined with each other and combined with each other.   A columnar body pulling machine comprising: the columnar body pulling attachment according to any one of claims 1 to 4 attached to a multi-joint work arm of a self-propelled working machine.

Images