JPH09235729A - Pulling-out device for rotary excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a larger pulling-out force by a rotary excavating machine for general purposes. SOLUTION: A hollow cylindrical body 21 is connected to the rotary shaft 12 of a rotary excavating machine 11 and a transferable body 24 is screwed in this hollow cylindrical body 21. A detent 32 is provided in the transferable body 24. A chuck piece 47 is fixed to the outside face of an embedded pipe 1 by a setting ring 51. The transferable body 24 and the setting ring 51 are connected to each other by a rod 44. The rotary torque of the rotary shaft 12 is converted to a large pulling-out force by the screwed connection of the hollow cylinder 21 and the transferable body 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary excavator extracting device for extracting a buried pipe buried in the ground for a water well, anchor work, landslide prevention, and the like.

[0002]

Conventionally, in boring for embedding a buried pipe such as a steel pipe, the buried pipe is pushed while rotating, or the bit device provided at the tip of the buried pipe is pushed while rotating and buried. Drilling is performed by pushing the boring rod inserted into the pipe while rotating it, or by giving an impact force when rotating them.The rotary excavator is used to rotate the buried pipe or the boring rod. This rotary excavator has a function of pushing a buried pipe and a function of giving an impact force when necessary.

In the case of pulling out the buried pipe pushed in, a large hydraulic jack is conventionally required, which makes it difficult to carry and install a large-sized device and takes a lot of time to pull out. For example, in water wells, etc., after inserting the strainer into the buried pipe, pull out the buried pipe, and for anchor work, etc., insert the anchor into the buried pipe and fix the tip of the anchor to the ground before Since the pipe is pulled out, the buried pipe sticks to the ground due to the passage of time due to those operations, and a large pulling force is required.Because the internal strainer and anchor are damaged, it is possible to pull out while rotating. It was not possible, and a large hydraulic jack separate from the excavator was required, resulting in poor workability.

Therefore, an object of the present invention is to provide a pulling device for a rotary excavator capable of pulling out a buried pipe by a rotary excavator without requiring a large-sized device.

[0005]

According to a first aspect of the present invention, in a rotary excavator extracting device for extracting a buried pipe buried in the ground, a screw portion rotated by a rotary shaft of the rotary excavator, A moving body provided with a screw portion that is screwed into the screw portion; a rotation stopping portion that stops the moving body when moving; and a connecting portion that connects the moving body and the buried pipe. The rotation of the rotating shaft causes the moving body to move, and the embedded pipe connected to this moving body is pulled out. The rotation of the rotating shaft is converted into a large pulling force by the screw portion.

According to a second aspect of the present invention, in a rotary excavator extracting device for inserting an anchor into the buried pipe and then pulling out the buried pipe, a cylinder having a male screw portion is provided on the rotary shaft. An opening portion into which the end portion of the anchor can be inserted is provided at the tip of the tubular body, and a female screw portion that is screwed into the male screw portion is provided to the moving body, and the end portion of the anchor protruding from the embedded pipe. Can be inserted into the cylinder,
The end of the anchor does not get in the way of pulling out.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 6 show a first embodiment of the present invention. First, referring to FIG. 6, excavation of a buried pipe by a rotary excavator will be described. In the figure, a bit casing pipe 2 forming a part of the embedded pipe 1 is welded to the tip of the embedded pipe 1 made of a steel pipe or the like. In this example, the buried pipe 1 is excavated and buried in the ground G such as a slope. An air hammer 3 is inserted into the buried pipe 1, and a tubular portion 5 at the base end of a device 4 is connected to the air hammer 3, and a spline groove (not shown) is integrally formed on the outer periphery of the tubular portion 5. The spline groove is fitted in a vertical groove (not shown) of the air hammer 3 so that the rotation of the air hammer 3 is transmitted to the device 4. Further, the air hammer 3 is configured to transfer compressed air or the like. A hammer piston 3A as a power source is incorporated, and the hammer piston 3A strikes the tubular portion 5 to transmit an impact force. Further, the device 4 engages with the bit casing pipe 2 and pushes the bit casing pipe 2 with the device 4. A bit device 6 is provided at the tip of the device 4, and the bit device 6 is provided with a plurality of expansion wings 7. When the expansion blade 7 is closed, the bit device 6 can be inserted into the buried pipe 1. A bit sub 8 is connected to the base end of the air hammer 3 by screwing, a boring rod 9 is screwed to the base end of the bit sub 8, and the boring rod 9 is connected to the base end of a plurality of connected boring rods. Rod 9
A rotary shaft 12 of a rotary excavator 11 that is a boring device that pushes in while rotating is connected on the ground.

The rotary excavator 11 is provided with square pipes 13A as guide portions forming a part of the tilt base 13 on the left and right in the longitudinal direction of the tilt base 13, and the square pipes 13A are provided with front and rear corner pipes 13A. Guide rails 14 in the length direction are provided so as to project laterally, and receiving guides 15 that engage with the guide rails 14 are provided at the lower left and right sides of the drive unit body 16, respectively, and the drive unit body is provided along the guide rails 14. 16 is movably provided, and the drive unit main body 16 is reciprocally driven in the longitudinal direction by a movement drive means 17 provided on the tilt base 13, and as the movement drive means 17, a cylinder or chain drive means is used. To be The drive unit main body 16 has a motor 18 as a rotation drive means.
Is provided, and the rotating shaft 12 is rotated by the motor 18. The rotary shaft 12 also has a
A is provided. Therefore, when excavating the buried pipe 1, the boring rod 9 is screwed and connected to the rotary shaft 12, the boring rod 9 is rotated by the motor 18, and is driven by the movement driving means 17. The buried pipe 1 can be pushed in by moving the part main body 16 to the front side. And the buried pipe 1 in the underground G such as a slope
After burying, the expansion blade 7 is closed and the bit device 6 is recovered on the ground together with the boring rod 9, and then an anchor 19 made of PC steel wire or the like for slope fixing is inserted into the burial pipe 1 and the anchor 19 After fixing the tip of the embedded pipe to the ground, the buried pipe 1 is pulled out. Further, the tilting base 13 is provided with tilting means 20 and 100 at the lower part thereof, and the tilting means 20 and 100 are provided with telescopic shafts 20A and 100A which extend and contract by a hydraulic cylinder or the like. Is pivotally attached to the tilting base 13 by means of the
00B is pivotally attached to the center of the link piece 20C, and both sides of the link piece 20C are pivotally attached to the tilting base 13 and the base 20D by pivots 20E and 20F, respectively.
The rear ends of the tilting means 20 and 100 are pivotally attached to the base 20D, so that the tilting base 13 tilts with respect to the base 20D by the expansion and contraction of the tilting means 20 and 100.

A pulling device for pulling out the buried pipe 1 by the rotary excavator 11 will be described. The hollow cylindrical body 21 is provided with a male angular screw portion 22 as a screw portion, and the hollow cylindrical body 21 is provided.
An opening 21A into which the anchor 19 can be inserted is provided at the tip of the socket, and a socket 23 is integrally provided at the rear of the socket. The socket 23 is detachably screwed to the taper screw portion 12A of the rotary shaft 12, whereby The square screw portion 22 is rotated by the rotating shaft 12. A moving body 24, which is shorter than this and has a tubular shape, is externally fitted to the hollow cylindrical body 21. As shown in FIG. 3, the male angular screw portion 22 is formed on the inner peripheral surface of the moving body 24. A female square screw portion 25, which is a screw portion to be screwed into, is provided. The moving body
A large-diameter portion 26 is formed substantially in the center of 24, and a substantially columnar cylindrical portion 27 is integrally projectingly provided on the upper portion of the large-diameter portion 26, and an engaging groove 28 is provided around the cylindrical portion 27. Has been done. Also, the large diameter part
Flat engaging surfaces 29 are formed on the left and right sides of 26, respectively. Furthermore, on the outer periphery on one side in the length direction of the moving body 24,
A taper-shaped male screw portion 30 that can be screwed into the embedded pipe 1 is formed. When this male screw portion 30 is not used, a cylindrical cover 31 having a female screw portion 31A formed on the inner peripheral surface is screwed in. To protect the male screw portion 30. Further, as shown in FIGS. 3 and 4, a detent portion 32 that detents the moving body 24 during movement.
Has a receiving cylinder 33 that is externally fitted to the front side of the moving body 24, and engaging receiving surfaces 34 that engage with the engaging surface 29 are formed on the left and right of the rear portion of the receiving cylinder 33, respectively. , And its receiver 33
Leg portions 35 that engage with the inside of the square pipe 13A are integrally provided on the left and right sides of the lower portion of the square pipe, and the outer surfaces of the leg portions 35 are combined to reduce friction with the square pipe 13A and enhance slidability. A sliding plate 36 made of resin or the like is provided. Further, left and right arm portions 33A are provided at the lower portion of the receiving cylinder 33, and front and rear sliding arm portions 35A are provided at the lower portions on both sides of the arm portion 33A. Is slanted upward, and the sliding arm portion 35A slides on the upper surface of the guide rail 14. The movable body 24 is fixed by the fixing member 37 to the rotation stopping portion 32.
The fixing member is fixed to the tubular portion 38 that is fitted onto the cylindrical portion 27, and the locking piece 39 that is locked to the front edge of the receiving cylinder 33.
And a screw hole 41 into which a screw 40 that engages with the engagement groove 28 of the columnar portion 27 is screwed. Then, as shown in FIG. 3, the moving body 24 is inserted and arranged in the receiving cylinder 33, and the fixing member 37 is attached to the columnar portion 27.
And the locking piece 39 of the fixing member 37 is fitted onto the receiving cylinder 33.
The moving body 24 is fixed to the rotation stopping portion 32 by engaging with the front edge of the screw and screwing the screw 40 into the screw hole 41. Further, connecting arms 42 are integrally provided on the left and right of the rotation stopping portion 32, and a groove 43 in the length direction is formed in the connecting arm 42.
In addition, a rod 44 as a connecting portion can be inserted and removed from the side, and a plurality of large diameter portions 45 provided at the rod 44 at predetermined intervals are locked to the end portion of the groove 43. Further, taper portions 46 of approximately 45 degrees are formed on both sides of the large diameter portion 45. The buried pipe 1
A half-cylindrical chuck piece 47, 47 is fitted on the outer surface of the chuck piece 47, and a wedge portion 48 that has been hardened so as to be in close contact with the buried pipe 1 is provided on the inner surface of the chuck piece 47, and the outer surface has a wedge shape. A handle 50 is formed on the outer taper surface 49, and each chuck piece 47 is provided with a handle 50. The chuck piece
A pressing ring 51 is externally fitted to the 47, an inner surface of the pressing ring 51 is formed with a tapered inner surface 52 corresponding to the tapered outer surface 49, and a connecting arm 53 is integrally provided on the left and right of the pressing ring 51. A longitudinal groove 54 is formed in the connecting arm 53, and the rod 44 can be inserted into and removed from the groove 54 from the side, and a taper portion 54A formed at the end of the groove 54 is formed. The taper portion 45 of the large-diameter portion 45 is locked to.

Next, the operation of pulling out the buried pipe 1 buried in the ground G by using the pulling device will be explained. As shown in FIGS. 1 and 2, the hollow cylinder 21 is attached to the rotary shaft 12 of the excavator 11. The hollow cylindrical body 21 is screwed onto the moving body 24 fixed to the rotation stopping portion 32 while being screwed. Further, the chuck pieces 47, 47 are arranged on the outer surface of the buried pipe 1, and the pressing ring is attached to them.
Fit 51 outside. Furthermore, connect both connecting arms 42 and 53 to the rod 44.
Connect by. Then, the motor 18 is driven by an operation switch (not shown), when the square screw portion 22 of the hollow cylindrical body 21 is a right-hand screw, the rotary shaft 12 is rotated right, and when the square screw portion 22 is a left-hand screw, the rotary shaft is When 12 is rotated counterclockwise, the hollow cylindrical body 21 is rotated, and the moving body 24 that is movably screwed into the hollow cylindrical body 21 is moved rearward integrally with the rotation stopping portion 32, and by this movement, the embedded body connected via the rod 44. The tube 1 is pulled out, and the rotary shaft 12
Since the rotation torque is converted into a tensile force by screwing the square screw portions 22 and 25, the embedded pipe 1 can be pulled out with a large force. Further, at the time of the pulling out, the movement driving means 17 is driven to move the driving portion main body 16 rearward, and the square screw portions 22, 25
It is also possible to pull out the embedded pipe 1 which cannot be pulled out only by the force of the movement driving means, in addition to the pulling force due to the screwing of the pulling force by the movement driving means. Then, when the buried pipe 1 is pulled out by the backward movement of the moving body 24 and the rotary shaft 12 is slightly rotated in the opposite direction, the moving body 24 slightly moves forward and the loosened rod 44 is pulled out to the side. Then, the pressing ring 51 is moved to the front side, the chuck pieces 47, 47 are removed, the embedded pipe 1 corresponding to the pulled-out portion is removed, and the moving body 24 is moved to the front side. 47 and the pressing ring 51 are fixed to the buried pipe 1 side, the pressing ring 51 and the moving body 24 side are connected by the rod 44, and the rotary shaft 12 is rotated in the same manner as described above to pull out. Since a large force is required for the withdrawal in the initial stage, when the predetermined amount of withdrawal is completed, the rotary shaft 12 and the buried pipe 1 are connected by a predetermined jig (not shown) to move and drive means.
You may be able to pull it out only with the power of 17. Further, as shown in FIG. 1, even if the end portion of the anchor 19 projects, the opening portion
If it is inserted into the hollow cylindrical body 21 provided with 21A, it does not get in the way and it is not necessary to bend the end portion of the anchor 19.

As described above, according to this embodiment, in the rotary excavator extracting device for extracting the buried pipe 1 buried in the ground G, the rotary shaft 12 of the rotary excavator 11 is used. A square screw portion 22 that is a rotating screw portion, a moving body 24 that is provided with a square screw portion 25 that is a screw portion that is screwed into the square screw portion 22, and a detent portion 32 that stops the moving body 24 during movement. , Mobile 24
Since the rod 44 which is a connecting portion for connecting the embedded pipe 1 and the embedded pipe 1 is provided, the moving body 24 is moved by the rotation of the rotating shaft 12, and the embedded pipe 1 connected to the moving body 24 is pulled out. Therefore, the rotation of the rotary shaft 12 is converted into a large pulling force by the square screw portions 22 and 25 with which the rotary shaft 12 is screwed, and the pulling, which conventionally required a large jack, can be pulled out by the general-purpose rotary excavator 11. Further, since the embedded pipe 1 is pulled out without turning by the rotation stopping portion 32, the anchor or strainer inserted inside the embedded pipe 1 can be pulled out without being damaged.

As described above, according to this embodiment, the second aspect
Corresponding to, in the extraction device for the rotary excavator which inserts the anchor 19 into the buried pipe 1 and then withdraws the buried pipe 1, a rotary shaft
A hollow cylindrical body 21 having a square screw portion 22 as a male screw portion is provided at 12, an opening 21A into which an end portion of an anchor 19 can be inserted is provided at a tip of the hollow cylindrical body 21, and a male square screw is provided at a moving body 24. Since the square screw portion 25 that is a female screw portion that is screwed into the portion 22 is provided, the end portion of the anchor 19 protruding from the embedded pipe 1 can be inserted into the hollow cylindrical body 21 in advance. , The end of the anchor 19 does not get in the way when it is pulled out, and it is not necessary to bend the end of the anchor 19 either.
It is possible to stably fix the block and the like.

Further, as an effect of the embodiment, it is necessary to engage the leg portion 35 with the square pipe 13A provided with the guide rail 14 and then provide the guide rail separately for the rotation stopping portion 32. Instead, since the left and right legs 35 engage with the left and right square pipes 13A, stable movement is possible in a detented state,
Furthermore, since the sliding arm portions 35A on both the left and right ends slide on the upper surface of the guide rail 14, stable movement is possible. Also,
Since the screw parts are the square screw parts 22 and 25, a large force can be transmitted. Further, the moving body 24 having the square screw portion 25
Since the rotation stopper 32 and the rotation stopper 32 are assembled, even if the square screw portion 25 is damaged by repeated use, for example, only the moving body 24 needs to be replaced, and the fixing member 37 can be easily disassembled. Since it is not necessary to weld both, the moving body 24 is not distorted by welding. Furthermore, by using the left and right rods 44, the excavator 11 side and the buried pipe 1 can be stably connected, and a tensile force can be uniformly applied to the buried pipe 1. Furthermore, the groove of the connecting arms 42, 53
The rod 44 can be easily attached by inserting it from the side of 43, 54, and the rod 44 is provided with a plurality of large diameter portions 45, so that it can be fitted to the distance between the moving body 24 and the buried pipe 1. The rod 44 can be easily used. Further, since the leg portion 35 is provided with the sliding plate 36, sliding with the square pipe 13A is smoothly performed. Furthermore, since the wedge-shaped wedge portion 48, which has been hardened, is provided on the inner surfaces of the two-piece chuck pieces 47, the embedded pipe 1 can be firmly clamped.
Further, since the grip 50 is provided on the chuck piece 47, it is easy to handle. Furthermore, if the chuck pieces 47 having different diameters on the inner peripheral surface are created, it is possible to sandwich embedded pipes having different sizes. Furthermore, the taper portion 46 of the large-diameter portion 45 is a groove.
Since the taper portion 54A of 54 is engaged, a stable connected state can be obtained.

FIG. 7 shows a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. This is an example in which the moving body 24 is directly connected to the buried pipe 1 without using the rotation stopping part 32 of the example, and a screw part is provided at the end of the buried pipe 1 for connecting the buried pipes 1 and 1 to each other. 1A is provided, and a male screw portion 30 of the moving body 24 is screwed to the screw portion 1A, and the male screw portion 30 constitutes a connecting portion that connects the moving body 24 and the buried pipe 1. Then, in this example, the moving body 24 is used in the direction opposite to the front-rear direction from the first embodiment. In addition, in the rotation stopping portion 32A of this example, a cylindrical rod-shaped engaging portion 62 is integrally provided on a cylindrical portion 61 which is fitted onto the cylindrical portion 27, and the tip of the engaging portion 62 is a spherical sliding portion. 63 is formed, and a screw is formed on the tubular portion 61.
A screw hole 65 for screwing the screw 64 is formed. Then, the cylindrical portion 61 is externally fitted to the cylindrical portion 27, and the screw 64 is screwed, so that the screw 64 is locked in the engaging groove 28 and the detent portion 32A is connected.
From the distance H between the upper surface of the tilting base 13 and the tip of the cylindrical portion 27,
The engagement portion 62 is formed so that the distance L from the tip of the engagement portion 62 in the connected state is long.

When the hollow cylindrical body 21 is screwed into the moving body 24 fixed to the buried pipe 1 and the hollow cylindrical body 21 is rotated in the predetermined direction by the rotary shaft 12, the sliding portion 63 of the rotation stopping portion 32A or The outer periphery of the engaging portion 62 is provided on the upper surface of the tilting base 13 or the upper member to prevent the movable body 24 from rotating, and the movable body 24 is moved backward by the screwing of the square screw portions 22 and 25, thereby burying the embedded pipe. 1 is pulled out. Further, in this example, the embedded pipe 1 can be pushed in with a large force by rotating in the direction opposite to the predetermined direction.

As described above, according to this embodiment, in the rotary excavator extracting device for extracting the buried pipe 1 buried in the ground G, the rotary shaft 12 of the rotary excavator 11 is used. A square screw portion 22 that is a rotating screw portion, a movable body 24 that is provided with a square screw portion 25 that is a screw portion that is screwed into the square screw portion 22, and a movable body 24 that slides on the tilting base 13 that is a base. Since it is provided with a rotation stopping portion 32A that stops rotation when moving and a male screw 30 that is a connecting portion that connects the moving body 24 and the buried pipe 1,
The rotation of the rotary shaft 12 is converted into a large pulling force by the square screw portions 22 and 25 with which the rotary shaft 12 is screwed, and the pulling, which conventionally required a large jack, can be pulled by the general-purpose rotary excavator 11. Further, in this example, since the moving body 24 is directly connected to the buried pipe 1, a large force can be obtained not only for pulling out but also for pushing. Also, the detent portion 32A is
The structure can be simplified because the movable body 24 slides on the base and stops when the movable body 24 moves.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the present invention can also be used in a so-called rotary percussion type excavator that applies an impact force to a rotary shaft of an excavator by a hydraulic hammer during driving and withdrawal. It can be done easily.

[0018]

According to a first aspect of the present invention, in a rotary excavator extracting device for extracting a buried pipe buried in the ground, a screw portion which is rotated by a rotary shaft of the rotary excavator and the screw portion is provided. A moving body provided with a screw part to be screwed, a rotation stopping part for stopping the moving body when moving, and a connecting part for connecting the moving body and the buried pipe to each other. It is possible to provide a pulling device for a rotary excavator that can pull out a buried pipe by a rotary excavator without need.

According to a second aspect of the present invention, in a rotary excavator extracting device for inserting an anchor into the buried pipe and then pulling out the buried pipe, a cylinder having a male screw portion is provided on the rotary shaft. An opening portion into which the end portion of the anchor can be inserted is provided at the tip of the tubular body, and the moving body is provided with a female screw portion that is screwed into the male screw portion, so that the anchor is not damaged, (EN) It is possible to provide a pulling device for a rotary excavator that can pull out a buried pipe by a rotary excavator without requiring a large-scale device.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a first embodiment of the present invention in a use state.

FIG. 2 is a side view of a use state showing the first embodiment of the present invention.

FIG. 3 is a partially cutaway side view of a moving body, a rotation stopping portion, and a fixing member according to the first embodiment of the present invention.

FIG. 4 is a partially cutaway front view of the rotation stopping portion engaged with the guide rail and the moving body in a detached state, showing the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of the chuck piece and the pressing ring according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating the boring of the buried pipe showing the first embodiment of the present invention.

FIG. 7 is a cross-sectional view of an essential part showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Buried pipe 11 Rotary excavator 12 Rotating shaft 19 Anchor 21 Tube (hollow tube) 21A Opening 22 Square screw part (male screw part) 24 Moving body 25 Square screw part (female screw part) 30 Male screw part (connection) Part) 32 32A rotation stop part 44 rod (connecting part) G underground

Claims (2)

[Claims] 1. A pulling device for a rotary excavator for pulling out a buried pipe buried in the ground, wherein a screw part which is rotated by a rotary shaft of the rotary excavator and a screw part which is screwed to the screw part are provided. A rotary excavator withdrawal device, comprising: a moving body; a rotation stopping portion that stops the moving body when moving; and a connecting portion that connects the moving body and the buried pipe. 2. A rotary excavator pulling-out device for pulling out the buried pipe after inserting an anchor into the buried pipe, wherein a cylindrical body having a male screw portion is provided on the rotary shaft, and a tip end of the cylindrical body is provided. The rotary excavating and extracting device according to claim 1, wherein an opening into which an end portion of the anchor is inserted is provided, and a female screw portion that is screwed to the male screw portion is provided on the moving body.