JP2016121513A - Double-pipe rod exchange device of ground drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-pipe rod exchange device of a ground drilling device which can be installed in a narrow space, is light in weight, and low in expense.SOLUTION: A double-pipe rod holding device 6 sets a double-pipe rod 5 in an inclined position which is inclined with respect to a horizontal direction. A double-pipe rod exchange device comprises a double-pipe rod inclinable device 62 which can change a posture of the double-pipe rod 5 between the inclined position and an erected position. A lower end of an inner rod 52 is pushed up by a pressing plate 72 by a press hydraulic cylinder 71, and an upper end of the pressing plate is made to protrude from an upper end of an outer casing 51. A slide base 15 is moved horizontally with respect to a double-pipe rod exchange position B, and a center axial line of a main shaft 16 is made to coincide with a center axial line of the double-pipe rod 5. A traveling frame 14 is moved downwardly. An inner-pipe coupling 3 is connected to the inner rod 52 by rotating the main shaft 16, by rotating the inner-pipe coupling 3 and an outer-pipe coupling 2, and by screwing a female screw 31 of the inner-pipe coupling 3 into a male screw 521 of the inner rod 52.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double tube rod exchange device for a ground drilling device. More particularly, the present invention relates to a double tube rod exchange device for a ground drilling device, in which connection and disconnection work of a double tube rod composed of an inner rod and an outer casing is quickly performed with a small amount of labor.

  In the ground drilling device, the ground is drilled with a bit attached to the tip of the inner rod and outer casing, and the number of double tube rods corresponding to the drilling depth is sequentially connected to the rear end of the double tube rod after drilling. On the contrary, when pulling out, the double tube rods are separated one by one. The connection and disconnection of such a double tube rod by the operator is very laborious and dangerous due to the large and long weight of the double tube rod. Various devices that mechanize the connection and disconnection work have been proposed.

  The double-tube rod exchanging device of Patent Document 1 and Patent Document 2 is set with the double-tube rod laid sideways, and the double-tube rod is raised in an upright position and connected to the main shaft of the ground drilling device. . When the double tube rod is set on its side, a long double tube rod requires a large space around the ground drilling device. In addition, in order to raise the double tube rod in the upright position, an actuator having a large force is required, so that the double tube rod exchange device is large and heavy.

  In the double tube rod exchanging device of Patent Document 3 and Patent Document 4, the double tube rod is set in an upright position at a position laterally separated from the main shaft of the ground drilling device, and the double tube rod is set to the main shaft of the ground drilling device. It is connected to the spindle after being carried underneath. In order to carry a long and heavy double tube rod directly under the main shaft, the rigidity of the double tube rod changer is required, so the double tube rod changer is large and heavy, and the structure becomes complicated. Also gets higher. Also, setting the double tube rod in an upright position is more difficult to work than laying the double tube rod sideways.

JP-A-6-341284 Japanese Patent Laid-Open No. 5-263582 JP-A-5-302488 JP-A-6-294128

An object of the present invention is to provide a double tube rod exchange device for a ground drilling device that can be installed in a narrow space and is light and inexpensive.
Another object of the present invention is to provide a double tube rod exchanging device for a ground drilling device having good workability for rod exchanging.

The said subject is solved by the following means.
That is, the double tube rod exchanging device of the ground drilling device of the present invention includes a frame that can be installed in an upright position, a traveling frame that is mounted on the frame so as to be movable in the longitudinal direction of the frame, and the traveling frame The slide base is movably mounted in a direction perpendicular to the moving direction of the travel frame, and is movable between a drilling position and a double tube rod exchange position, and is mounted on the slide base and the travel frame. A main shaft that rotates a double tube rod composed of an inner rod and an outer casing, a rotation drive device that is placed on the slide base and applies a rotational force to the main shaft, and A double tube rod exchange device disposed at the double tube rod exchange position in the vicinity of the lower end of the frame; and the double tube rod exchange device attached to the double tube rod exchange device. A double tube rod holding device for holding the double tube rod in parallel with the moving direction of the traveling frame at a position to be exchanged, and a double tube rod exchange device, and the lower end of the inner rod is pushed up, An inner rod lifting device for projecting the upper end of the inner rod from the upper end of the outer casing, and the double tube rod exchange device, and gripping the outer periphery of the outer casing, the upper end of the outer casing is An outer casing raising device that protrudes from the upper end is provided.

The double tube rod exchanging device of the ground drilling device according to the second aspect of the present invention is the double tube rod holding device according to the first aspect of the present invention, wherein the central axis of the double tube rod is inclined with respect to the moving direction of the traveling frame. A double tube rod raising / lowering device capable of changing the posture of the double tube rod between an inclined position and an upright position parallel to the moving direction of the traveling frame is provided.
The double pipe rod exchanging device of the ground drilling device of the present invention 3 is the inner pipe coupling having a female screw attached to the lower end of the main shaft and connected to the male screw of the upper end of the inner rod in the second invention, A conical guide surface is formed at the lower end of the internal thread of the inner pipe coupling and expands toward the external thread at the upper end of the inner rod.

  The double tube rod exchanging device of the ground drilling device according to the present invention moves the slide base between the drilling position and the double tube rod replacing position, and sets the posture of the double tube rod set in the inclined position to the upright position. Since the rod is exchanged, it can be installed in a narrow space, and since the structure is simple and the rigidity is small, it can be manufactured at low cost. Further, since the replacement work of the double tube rod is performed at a position where it does not interfere with the rod chuck or the like, the work efficiency is improved.

FIG. 1 is an overall front view showing a double tube rod exchange device of a ground drilling device of the present invention. FIG. 2 is a left side view of FIG. FIG. 3 is an overall perspective view showing a part of the double tube rod exchanging apparatus of FIG. FIG. 4 is a longitudinal sectional view of the double tube rod exchanging device of FIG. 3, and is an operation explanatory view showing a state in which the double tube rod is set at an inclined position. FIG. 5 (a) shows the post-process of FIG. 4, and the double pipe rod is raised to the upright position, the upper end of the inner rod protrudes from the upper end of the outer casing, and the inner pipe coupling is screwed into the upper end of the inner rod. FIG. 5 (b) is an enlarged cross-sectional view of the upper end of FIG. 5 (a). FIG. 6 shows a post-process of FIG. 5, an operation explanation showing an operation of gripping the outer periphery of the outer casing, projecting the upper end of the outer casing from the upper end of the inner rod, and screwing the outer pipe coupling into the upper end of the outer casing. FIG. FIG. 7 is an operation explanatory view showing the operation of moving the slide base to the double tube rod replacement position, lowering the traveling frame, and screwing the inner tube coupling into the upper end of the inner rod. FIG. 8 shows a post-process of FIG. 7, and describes the operation of lowering the traveling frame and screwing the outer pipe coupling into the upper end of the outer casing after the upper end of the outer casing protrudes from the upper end of the inner rod. FIG. FIG. 9 is an operation explanatory view showing a state in which the double tube rod is extracted from the double tube rod exchanging device by raising the traveling frame, showing the post-process of FIG. 8. FIG. 10 shows a post-process of FIG. 9, the slide base is moved to the drilling position, the traveling frame is lowered, and the lower end of the double pipe rod that has been carried in is placed on the upper end of the double pipe rod that has already penetrated into the ground. It is operation | movement explanatory drawing which shows the operation | movement which adds.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall front view showing a double tube rod exchange device of a ground drilling device of the present invention, and FIG. 2 is a left side view of FIG. As shown in FIGS. 1 and 2, the columnar frame 11 of the ground drilling device 1 of the present invention is erected on a thick plate-like base 12 installed on the ground, and is vertically moved by a swing hydraulic cylinder 13. It is attached so that the standing angle can be adjusted in the plane. In the embodiment of the present invention, the frame 11 is erected in an upright position on the ground via the base 12. The frame 11 may be attached to a self-propelled crawler or the like so as to be easily movable to a predetermined place. A traveling frame 14 is placed on the frame 11 so as to be movable in the vertical direction along the longitudinal direction of the frame 11. The traveling frame 14 is driven by a hydraulic cylinder (not shown) and moves in the vertical direction. The driving means of the traveling frame 14 may be an electric motor or a chain drive by a hydraulic rotary motor, or a combination of a hydraulic cylinder and a chain.

  A slide base 15 is movably mounted on the traveling frame 14 so as to be movable in a direction (horizontal direction) orthogonal to the moving direction of the traveling frame 14. The slide base 15 is driven by the slide hydraulic cylinder 19 and moves in the horizontal direction. A main shaft 16 having a central axis in the vertical direction is rotatably supported on the slide base 15. The main shaft 16 is given a rotational force by the rotation drive device 17 and a vibration force in the central axis direction by the vibration generator 18. A hollow cylindrical outer tube coupling 2 and an inner tube coupling 3 having a smaller diameter and longer in the axial direction than the outer tube coupling 2 are fixed to the lower end of the main shaft 16, and the outer tube coupling 2 is rotated by the rotation of the main shaft 16. And the inner pipe coupling 3 rotates. The inner pipe coupling 3 penetrates into the outer pipe coupling 2 and is attached so as to protrude downward from the lower end of the outer pipe coupling 2.

  On the ground near the lower end of the frame 11, the double tube rod exchanging device 4 is installed, and the double tube rod 5 connected to the main shaft 16 is set. The outer pipe coupling 2 is screwed into the outer casing 51 of the double pipe rod 5, and the inner pipe coupling 3 is screwed into the inner rod 52 of the double pipe rod 5. The slide base 15 is horizontally arranged between a drilling position A indicated by a solid line in FIG. 1 and a double pipe rod exchange position B indicated by a two-dot chain line (directly above the double pipe rod exchange device 4 in FIG. 1). Moving.

  3 is an overall perspective view showing a part of the double tube rod exchanging device 4 in FIG. 1 in a cutaway manner, and FIG. 4 is a longitudinal sectional view of the double tube rod exchanging device 4 in FIG. It is operation | movement explanatory drawing which shows the state which set the rod 5 to the inclination position. FIG. 5 (a) shows a post-process of FIG. 4, with the double tube rod 5 raised to an upright position, the upper end of the inner rod 52 protruding from the upper end of the outer casing 51, and the inner tube cup at the upper end of the inner rod 52. It is operation | movement explanatory drawing which shows the operation | movement which screws in the ring 3, FIG.5 (b) is an expanded sectional view of the upper end of Fig.5 (a). As shown in FIGS. 3 to 5, the double tube rod exchanging device 4 includes a double tube rod holding device 6, an inner rod lifting device 7, and an outer casing lifting device 8 attached to a box-shaped housing 41. ing.

  The double tube rod holding device 6 includes an inclined guide 61 that sets the double tube rod 5 at an inclined position that is inclined with respect to the vertical direction (the moving direction of the traveling frame 14), and the posture of the double tube rod 5 is an inclined position. And a double tube rod raising / lowering device 62 that can be changed between the upright position and the upright position. The double tube rod raising / lowering device 62 includes a V block 621 and a raising / lowering hydraulic cylinder 622. The V block 621 is pivotally supported by the tilt guide 61 with a pin 623 as a fulcrum. The hydraulic cylinder 622 is pivotally supported by a bracket 624 fixed to the back surface of the inclined guide 61 so as to be swingable with a pin 625 as a fulcrum. The tip of the piston rod 626 of the raising / lowering hydraulic cylinder 622 is pivotally supported on the back surface of the V block 621 so as to be swingable with a pin 627 as a fulcrum. As shown in FIG. 4, when the double tube rod 5 is lifted by the wire 63 and lowered to the V surface of the V block 621, the double tube rod 5 can be easily set at the inclined position.

  The inner rod raising device 7 includes a pressing hydraulic cylinder 71 and a pressing plate 72. The pressing hydraulic cylinder 71 is fixed upright on a horizontal partition plate 42 formed inside the housing 41, and a pressing plate 72 is attached to the upper end of the piston rod 73 of the pressing hydraulic cylinder 71. As shown in FIG. 5, the vertical hydraulic cylinder 622 is operated to raise the double tube rod 5 to the upright position by the V block 621. Thereafter, the pressing hydraulic cylinder 71 is operated to push up the lower end of the inner rod 52 with the push plate 72 so that the upper end of the inner rod 52 protrudes from the upper end of the outer casing 51.

  The outer casing lifting device 8 includes a guide post 81, a lifting plate 82, gripping claws 83, 83, a lifting cylinder 84, and open / close hydraulic cylinders 85, 85. The guide post 81 is fixed upright on a top plate 43 formed on the upper surface of the housing 41, and an elevating plate 82 is attached along the guide surface 811 on the front surface of the guide post 81 so as to be movable in the vertical direction. The upper end of the piston rod 841 of the elevating hydraulic cylinder 84 is attached to the elevating plate 82, and the elevating hydraulic cylinder 84 is operated to move the elevating plate 82 in the vertical direction. The pair of gripping claws 83 and 83 supported by the elevating plate 82 so as to be openable and closable in a horizontal plane has a V-shaped gripping surface, and is opened and closed in parallel by the operation of the pair of opening and closing hydraulic cylinders 85 and 85. Grasping the outer periphery or releasing the gripping state.

  Next, the double tube rod replacement operation of the double tube rod replacement device of the above-described ground drilling device of the present invention will be described. As shown in FIG. 5, the vertical hydraulic cylinder 622 is operated to raise the double tube rod 5 to the upright position by the V block 621. Thereafter, the pressing hydraulic cylinder 71 is operated to push up the lower end of the inner rod 52 with the push plate 72 so that the upper end of the inner rod 52 protrudes from the upper end of the outer casing 51. As shown in FIG. 7, the slide base 15 is moved in the horizontal direction (left direction in FIG. 7) to the double tube rod replacement position B so that the center axis of the main shaft 16 coincides with the center axis of the double tube rod 5. Thereafter, the traveling frame 14 is moved downward in the vertical direction.

  As shown in FIG. 5, a male screw 521 is formed at the upper end of the inner rod 52, and a female screw 31 is formed at the lower end of the inner pipe coupling 3. In addition, a conical guide surface 32 whose diameter increases toward the male screw 521 is formed at the lower end (opening) of the female screw 31 of the inner pipe coupling 3. Therefore, when the conical guide surface 32 of the inner pipe coupling 3 comes into contact with the upper end of the inner rod 52, the central axis of the inner rod 52 can be easily aligned with the central axis of the inner pipe coupling 3. When the main shaft 16 is rotated and the inner tube coupling 3 and the outer tube coupling 2 are rotated, the female screw 31 of the inner tube coupling 3 is easily screwed into the male screw 521 of the inner rod 52, and the inner rod 52 is inserted into the inner rod 52. A pipe coupling 3 is connected.

  As shown in FIG. 6, the pair of opening and closing hydraulic cylinders 85 and 85 are operated to close the pair of gripping claws 83 and 83, and the outer periphery of the outer casing 51 is gripped by the pair of gripping claws 83 and 83. Thereafter, the elevating hydraulic cylinder 84 is operated to move the elevating plate 82 upward in the vertical direction so that the upper end of the outer casing 51 protrudes from the upper end of the inner rod 52. The push hydraulic cylinder 71 is operated to lower the push plate 72, and the push plate 72 is separated from the lower end of the inner rod 52. As shown in FIGS. 5 and 6, a female screw 511 is formed at the upper end of the outer casing 51, and a male screw 21 is formed at the lower end of the outer pipe coupling 2 by being screwed into and connected to the female screw 511. As shown in FIG. 8, when the traveling frame 14 is moved vertically downward while rotating the main shaft 16 and rotating the inner pipe coupling 3 and the outer pipe coupling 2, the outer pipe coupling 2 is attached to the outer casing 51. Are screwed together.

  As shown in FIG. 9, the pair of opening / closing hydraulic cylinders 85, 85 are operated to open the pair of gripping claws 83, 83 and release the gripping operation of the pair of gripping claws 83, 83. Thereafter, the lifting hydraulic cylinder 84 is operated to move the lifting plate 82 downward in the vertical direction. When the traveling frame 14 is moved upward in the vertical direction, the double tube rod 5 is extracted from the double tube rod exchange device 4.

  As shown in FIG. 10, the slide base 15 is moved to the right in the horizontal direction (illustrated above), and the double tube rod 5 is positioned at the drilling position A. Thereafter, the traveling frame 14 is moved downward in the vertical direction, the lower end of the double pipe rod 5 carried in is connected to the upper end of the double pipe rod previously driven into the ground, and the drilling operation is continued. When the double tube rod 5 is pulled out, the reverse operation of the double tube rod replacement operation is performed, and the double tube rod 5 is returned to the double tube rod replacement device 4.

  The double tube rod exchanging device of the ground drilling device of the present invention sets the double tube rod in the inclined position, so it is easier to set the double tube rod than lying down or set it upright. A heavy tube rod can be set. In addition, since the double tube rod is raised from the inclined position to the upright position, the space required for installing the double tube rod changer is small, and the actuator force to erect the double tube rod can be reduced. Therefore, the double tube rod exchange device can be made small and light.

  Furthermore, since the double tube rod exchanging device of the ground drilling device of the present invention does not require a mechanism for carrying the double tube rod directly under the main shaft, the structure of the double tube rod exchanging device is simple and rigid. Therefore, the double tube rod exchanging device can be manufactured at low cost. In order to receive the double tube rod from the double tube rod exchange device, the double tube rod exchange device of the ground drilling device of the present invention requires a mechanism for moving the slide base directly above the double tube rod exchange position. However, by moving the slide base to open the upper space of the drilling position A, it is possible to prevent interference with the rod chuck and improve workability when performing single tube excavation work or U tube insertion work. An effect is produced.

1 ... Ground drilling device 1
DESCRIPTION OF SYMBOLS 11 ... Frame 12 ... Base 13 ... Turning hydraulic cylinder 14 ... Traveling frame 15 ... Slide base 16 ... Main shaft 17 ... Rotary drive device 18 ... Vibration generator 19 ... Slide hydraulic cylinder 2 ... Outer pipe coupling 21 ... Male thread 3 ... Inner pipe Coupling 31 ... Female screw 32 ... Conical guide surface 4 ... Double tube rod changer 41 ... Housing 42 ... Partition plate 43 ... Top plate 5 ... Double tube rod 51 ... Outer casing 511 ... Female screw 52 ... Inner rod 521 ... Male screw 6 ... Double tube rod holding device 61 ... Inclination guide 62 ... Double tube rod tilting device 621 ... V block 622 ... Tilting hydraulic cylinder 623 ... Pin 624 ... Bracket 625 ... Pin 626 ... Piston rod 627 ... Pin 63 ... Wire 7 ... Inner rod raising device 71 ... Pressing hydraulic cylinder 72 ... Push plate 72
73 ... Piston rod 8 ... Outer casing raising device 81 ... Guide post 811 ... Guide surface 82 ... Elevating plate 83 ... Holding claw 84 ... Elevating cylinder 841 ... Piston rod 85 ... Opening / closing hydraulic cylinder A ... Punching position B ... Double pipe rod replacement position

Claims (3)

A frame that can be installed in an upright position;
A traveling frame mounted on the frame so as to be movable in the longitudinal direction of the frame;
A slide base mounted on the traveling frame so as to be movable in a direction orthogonal to the moving direction of the traveling frame, and movable between a drilling position and a double tube rod exchange position;
A main shaft mounted on the slide base, having a central axis parallel to the moving direction of the traveling frame, and rotating a double tube rod composed of an inner rod and an outer casing;
A rotation drive device mounted on the slide base and applying a rotational force to the main shaft;
A double tube rod exchange device disposed at the double tube rod exchange position near the lower end of the frame;
A double tube rod holding device attached to the double tube rod exchange device, and holding the double tube rod in parallel with the moving direction of the traveling frame at the double tube rod exchange position;
An inner rod lifting device that is attached to the double tube rod exchange device, pushes up the lower end of the inner rod, and projects the upper end of the inner rod from the upper end of the outer casing;
An outer casing lifting device that is attached to the double tube rod exchanging device, grips the outer periphery of the outer casing, and projects the upper end of the outer casing from the upper end of the inner rod. Double tube rod changer for equipment. In the double tube rod exchange device of the ground drilling device according to claim 1,
The double tube rod holding device is
The posture of the double tube rod can be changed between an inclined position where the center axis of the double tube rod is inclined with respect to the moving direction of the traveling frame and an upright position parallel to the moving direction of the traveling frame. A double tube rod exchanging device for a ground drilling device, comprising a double tube rod tilting device. In the double tube rod exchange device of the ground drilling device according to claim 2,
An inner pipe coupling attached to the lower end of the main shaft and having an internal thread connected to the external thread at the upper end of the inner rod;
A double tube rod exchanging device for a ground drilling device, comprising: a conical guide surface formed at a lower end of an internal thread of the inner tube coupling and expanding toward an external thread at an upper end of the inner rod.

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