JP2902583B2 - Detachable structure between drainer and casing in underground drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching and detaching a drainer and a casing in an underground hole excavator and a structure for attaching and detaching the casing.

[0002]

2. Description of the Related Art Underground hole excavators in the Venoto method are:
As shown in FIG. 7, a drainer 5 is suspended from a rotary drive mechanism 4 that can be raised and lowered by a push-pull cylinder 3 along a tower 2 mounted on a base machine 1. An excavating bucket 8 is connected to a lower end of a kelly bar 7 rotatably supported by a wire 6 while being engaged with the mechanism 4, and a casing 9 is connected to the drainer 5. When the casing 9 is rotated, the casing 9 is rotated and press-fitted. When the casing 9 is press-fitted to a certain depth, the casing 9 is removed from the drainer 5 and the casing 9 is removed.
The next casing 9 is lifted by a wire 10 such as a crane and connected to the lower end, and the upper end is connected to the drainer 5 to repeat the same excavation work.

As shown in FIG. 8, the drainer 5 is a bottomed cylindrical body having substantially the same diameter as the casing 9 and has a suspension support 11 attached to the upper end thereof and a casing 9 attached to the opened lower end.
Can be fitted at the upper end of the bolt insertion hole 12 at the periphery of the lower end.
Are provided at predetermined intervals. Therefore, as shown in FIG.
A step 13 that can be fitted to the lower end of the step 1 is formed.
3 is provided with a bolt insertion hole 14 that matches the bolt insertion hole 12.

Therefore, when connecting the drainer 5 and the casing 9, the lower end of the drainer 5 is fitted into the step 13 at the upper end of the casing 9, and the bolt insertion holes 12,
The bolts were inserted and nuts were fastened by matching 14 with each other.

[0005]

However, in order to connect the drainer 5 and the casing 9 in the above-mentioned conventional underground hole excavating apparatus, bolts and nuts are used. In addition, it is necessary to attach and detach a number of casings 9 to the drainer 5 before excavating one underground hole, so that work efficiency is low and the physical The burden was heavy.

In addition, although the operation of removing the casing 9 from the drainer 5 can be performed on the ground, the operation of connecting the casing 9 to the drainer 5 must be performed at a height at least approximately the same as the length of the casing 9. With danger.

Accordingly, the present invention has been made in view of the above circumstances, and provides a detaching method and a structure thereof which can be reliably connected by operating the ground from the ground without connecting the drainer and the casing without working at a high place.

[0008]

SUMMARY OF THE INVENTION A detachable structure between a drainer and a casing in an underground drilling apparatus according to the present invention.
The Doretera is supported on liftable rotary drive mechanism along the tower during earth bore drilling equipment,
Detachable structure for connecting and removing the casing
Te, while bored pin insertion hole matching with each other in the fitting portion of the de Retera and the casing, the pin insertion of Doretera
Surrounding the hole cylindrical and mutually diametrically opposite on the outer circumferential surface
And caps, and pistons at both ends inside
A piston having a rod is fitted movably in the axial direction,
To form a guide groove diagonally crossing the axis on the ston
The guide pin fixed to the cap is inserted into the guide groove.
Engage the piston pin on one piston rod and the other
The lever handle is connected to the piston rod of
By rotating the handle, the piston moves in the axial direction.
Move the stopper pin between the drainer and casing.
By engaging and disengaging the pin insertion hole,
Provide a basic structure that allows the detachment of the shing
You.

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. The drainer 15 according to the present invention is shown in FIG.
2, a plurality of casing stoppers 20 are provided at an upper end thereof, and a plurality of casing stoppers 20 are arranged at predetermined intervals on the periphery of the opened lower end so as to be diametrically opposed to each other, as shown in FIG. It is a bottomed cylindrical body having substantially the same diameter as the casing 16. A lever handle 21 is rotatably supported by the casing stopper 20. When a part of the operation rod 23 (see FIG. 6) is hooked on a hook portion 22 provided on the lever handle 21 and rotated, the drainer 15 and the casing are rotated. 16 can be connected or separated.

Therefore, the casing stopper 20 will be described in detail. An annular body 17 having a step portion is connected to the lower end of the drainer 15 by welding, and a pin insertion hole 24 is formed on the outer peripheral surface of the annular body 17 at a predetermined interval. As shown in FIGS. 3 and 4, the cylinder 25 is fixed via a welded portion 26 so as to surround the truncated conical pin insertion hole 24 whose outer peripheral surface side is open,
A stopper pin 27 is inserted into the cylinder 25 so as to be movable in the axial direction. The stopper pin 27 has a tapered tip and has a truncated conical shape that can be easily inserted into the pin insertion hole 24, and is connected to a piston rod 29 with a screw 28. The annular body 17 may be provided with a notch 18 for positioning with the casing 16 to be fitted, and the bolt insertion hole 12 may be formed in the same manner as in the conventional example.

A guide block 30 through which one end of a piston rod 29 penetrates is fixedly mounted on the cylinder 25 with screws 31. The guide block 30 is fastened together with screws 31 and a cap 32 is mounted. A piston 33 is formed at the center of the piston rod 29, and the piston 33 is movable in the axial direction inside the cap 32. A guide groove 34 is engraved on the outer peripheral surface of the piston 33, and a guide pin 35 engaging with the guide groove 34 is fixed to the outer peripheral surface of the cap 32 and enters the inside. The guide groove 34 is formed substantially spirally on the peripheral surface of the piston 33 and has a groove end 34 a orthogonal to the axial direction. When the piston rod 29 rotates forward and reverse, the piston 33 reciprocates in the cap 32 in the axial direction. .

The other end of the piston rod 29 is a cap 3
The lever handle 21 is axially fixed to the end portion of the lever handle 21 at right angles. FIG.
As shown in the figure, a linear engaging projection plate 37 is fixed to the substantially central portion of the lever handle 21 in parallel with the longitudinal direction, and the groove 38 with which the engaging projection plate 37 is engaged And a bolt 39 and a nut 40
Connects the piston rod 29 and the engagement projection plate 37. Therefore, when the lever handle 21 is rotated,
Since the piston rod 29 rotates and the piston 33 moves in the axial direction, the piston rod 29 moves the stopper pin 27 into and out of the pin insertion hole 24.

As shown in FIG. 6, the operation rod 23 is a rod having at least the same length as the casing 16 having an annular portion 41 which can be hooked on the hook portion 22 of the lever handle 21. Annular part 41
On the hook portion 22 to rotate the lever handle 21. The hook portions 22 are formed at both ends of the lever handle 21, but both are open in the same direction. That is, when the lever handle 21 is rotated approximately 90 degrees, the stopper pin 27 engages with the pin insertion holes 24 and 42,
Alternatively, the guide groove 34 is formed so as to be detachable.

[0015] At both ends of the casing 16, FIG.
As shown in the figure, the annular body 17 attached to the drainer 15
The stepped annular body 19 fitted to the inner peripheral surface of the base is connected by welding, and a tapered pin insertion hole 42 corresponding to the pin insertion hole 24 is formed in the annular body 19. Therefore, when connecting the drainer 3 and the casing 16, the stopper pins 27 engage with each other. However, when connecting the casings 16, appropriate bolts are inserted into the pin insertion holes 42 aligned with each other to prevent the casing 16 from coming off. And connect. Further, a bolt insertion hole (not shown) that matches the bolt insertion hole 12 of the annular body 17 is formed in the annular body 19, and a bolt is inserted through the bolt insertion hole as necessary, so that a stopper pin 27 is formed.
The connection between the drainer 15 and the casing 16 may be reinforced only by using the reinforcing member.

Therefore, when excavating an underground hole by replacing the above-mentioned drainer 15 with the drainer 5 of the underground hole excavating apparatus shown in FIG. 7, in the state shown in FIG. When the operator rotates the lever handle 21 clockwise by about 90 degrees with the operation rod 23 from the ground, the piston 33 rotates clockwise and the guide pin 35 moves to the oblique portion of the guide groove 34. It moves toward the insertion hole 24. Therefore, as shown in FIG. 5, the stopper pin 27 engages with the pin insertion holes 24 and 42, thereby connecting the drainer 15 and the casing 16 as shown in FIG. 6 (A).

When the rotary drive mechanism 4 is operated in this state to rotate the drainer 15 and the casing 16, the guide pin 35 receives a horizontal force acting on the stopper pin 27. At this time, the guide pin 35 is
4 is an oblique exchange unit component of the piston horizontal force is dispersed in the oblique direction
In order to be able to rotate the emissions 33, guide pins 35
Moves from the oblique portion to the orthogonal portion 34a perpendicular to the axial direction,
Thus, the rotation of the piston 33 is prevented.

Further, the casing 1
5, the annular portion 41 of the operating rod 23 is hooked on the hook portion 22 on the opposite side to rotate the lever handle 21 approximately 90 degrees counterclockwise in FIG. Since the guide pin 35 engaging with the portion 34a moves to the inclined portion of the guide groove 34, the stopper pin 27 comes out of the pin insertion holes 42 and 24. Therefore, as shown in FIG. 6B, the casing 16 can be separated from the drainer 15.

Thus, in the present invention, the operation of connecting the lifted drainer 15 and the casing 16 only requires rotating the lever handle 21 from the ground via the operating rod.

Incidentally, according to one of the objects of the present invention, that is, from the viewpoint of eliminating the work of connecting the drainer and the casing at a high place, the lever handle 21 is rotated by the operating rod 23 so that the stopper pin 27 is inserted into the pin insertion hole. Since it is sufficient that the piston 33 can be attached to and detached from the pistons 24 and 42, screws are formed on the outer peripheral surface of the piston 33 and the inner peripheral surface of the cap 32 to engage with each other, and the lever handle 21 is rotated to move the piston 33 in the axial direction. You may make it movable.

[0021]

According to the present invention described above, the operation of attaching and detaching the drainer and the casing can be performed with a single touch from the ground, so that the attaching and detaching efficiency is good, the working efficiency is improved, and the burden on the operator can be reduced. . Also, with Dray Teller
The time required for attaching and detaching the casing can be significantly reduced
The efficiency of the work process required for excavation of underground holes
As a result, the drilling time required for one underground hole is reduced.
Of course, it can be done.

Also, the stopper pin fixed to the cap is
Piston with guide groove to engage with lever handle
Rotate the guide groove to form an orthogonal part
And rotate the lever handle about 90 degrees to move the piston.
If you rotate it, the piston moves back and forth in the axial direction,
The stopper pin can be inserted into and removed from the pin insertion hole.
If the guide pin is located at the right angle,
The load on the papin causes the piston to rotate.
Therefore, the stopper pin is not
There is no risk of slipping out of the
Reliability.

[Brief description of the drawings]

FIG. 1 is a plan view (A) and a front view (B) showing a drainer according to the present invention.

FIG. 2 is a front view showing a connection state between the drainer and a casing according to the present invention.

FIG. 3 is a cross-sectional plan view showing a detachable structure of the drainer according to the present invention and a casing.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is an explanatory view of a desorption operation.

6 (A) and 6 (B) are explanatory views of a detachment action by a vertical section of a drainer and a casing.

FIG. 7 is a front view of an underground hole excavator.

FIG. 8 is a plan view (A) and a front view (B) showing a conventional drainer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 15 ... Draeterer 16 ... Casing 17 ... Annular body 20 ... Casing stopper 21 ... Lever handle 23 ... Operation rod 24,42 ... Pin insertion hole 25 ... Cylinder 27 ... Stopper pin 29 ... Piston rod 33 ... Piston 34 ... Guide groove 35 ... Guide pin

Claims (4)

(57) [Claims] 1. A detachable structure for connecting and detaching a casing to and from a drainer supported by a rotary drive mechanism that can be moved up and down along a tower in an underground excavation apparatus, wherein the casing and the casing are fitted to a fitting portion between the drainer and the casing. A cylinder and a cap are diametrically opposed to the outer peripheral surface around the pin insertion hole of the drainer while a cylinder and a cap are fixed. The piston is formed so as to be able to move in the direction, and the piston has a guide groove obliquely intersecting the axis, the guide pin fixed to the cap is engaged with the guide groove, and one piston rod has a stopper pin, and the other piston has Connect the lever handle to the rod,
By rotating the lever handle, the piston moves in the axial direction, and the stopper pin moves with the drainer.
By engaging and disengaging the pin insertion hole of the shingle,
Desorption structure <br/> the Doretera and the casing of the ground hole drilling apparatus being characterized in that to be able to desorb over a casing. 2. A detachable structure in which a casing is connected to and removed from a drainer supported by a rotary drive mechanism that can move up and down along a tower in an underground excavation apparatus, and is fitted to a fitting portion between the drainer and the casing. A cylinder and a cap are diametrically opposed to the outer peripheral surface around the pin insertion hole of the drainer while a cylinder and a cap are fixed. The piston is formed so as to be able to move in the direction, and the piston has a guide groove obliquely intersecting the axis, the guide pin fixed to the cap is engaged with the guide groove, and one piston rod has a stopper pin, and the other piston has Connect the lever handle to the rod,
The piston is moved in the axial direction by rotating the lever handle with an operating rod at least longer than the length of the casing, and the stopper pin is moved to the drainer and the casing.
By engaging and disengaging the pin insertion hole of the
Desorption structure between Doretera and the casing of the ground hole drilling apparatus being characterized in that to be able to desorb casing. 3. The pin insertion hole has a frusto-conical shape that opens toward the stopper pin, and the tip of the stopper pin has a frusto-conical shape that can be fitted therein. 3. A detachable structure between a drainer and a casing in the underground drilling apparatus according to 2. 4. The guide groove has a portion orthogonal to the axis of the piston and a portion oblique to the axis, and when the drainer is rotated, the guide pin moves to the orthogonal portion to prevent movement of the stopper pin. 3. The method according to claim 1, wherein
Or a detachable structure between a drainer and a casing in the underground hole excavator according to 3.