JPH10148082A - Rod holder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable operation for fixing or fixing-releasing of a drill rod simultaneously with other manual operation. SOLUTION: A pair of holding pieces 35 are supported rotatably to a holder body 33 through a pair of shafts 34. A rod fitting opening 38 is notched and formed to side face sections corresponding to a section between a pair of the holding pieces 35 in the holder body 33. A pair of the shafts 34 are rotated mutually in the opposite directions by interlocking mechanisms 51. Pinions 52 are fitted integrally to a pair of the shafts 34 respectively in the interlocking mechanisms 51, and racks 53 driven by a hydraulic cylinder 61 are engaged between these pinions 52 respectively. An operator manually operates a changeover valve for a stepping operator mounted at its foot by a stepping lever, the hydraulic cylinder 61 is expanded and contracted and driven, the racks 53 are moved vertically, the pinions 52 are turned, a pair of the holding pieces 35 are revolved, and a drill rod R for boring is fixed and held by these holding pieces 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod holder device for fixing and holding a drill rod for boring.

[0002]

2. Description of the Related Art FIG. 6 shows a boring machine for forcibly rotating and driving a drill rod for boring downward. A driving device 12 is provided on a base 11, and a tip portion of the driving device 12 A rotation transmission device 13 is provided, and a pair of hydraulic cylinders 14 are mounted on left and right portions of the rotation transmission device 13, and a crosshead 16 is provided between piston rods 15 of these hydraulic cylinders 14. The upper part of the drive rod 17 is rotatably connected, and the upper end of the drive rod 17 is provided with a hydraulic chuck device 18.
However, manual chuck devices 19 are provided at the lower ends, respectively.

The drive rod 17 and the chuck devices 18 and 19 are formed in a cylindrical shape so that a boring drill rod (not shown) can be inserted from above to below, and inserted into the drive rod 17. The drill rod is gripped by the chuck devices 18 and 19, and the rotation transmission device 13 is held.
From the hydraulic cylinder 14 while transmitting the rotational force applied to the drive rod 17 to the drill rod.
The pressing force applied to 17 is transmitted to the drill rod.

A plurality of drill rods having a predetermined length are used in a continuous manner. In the continuous work, the drum 23 is operated forward or backward by two operation levers 21 and 22 provided in a boring machine. This operation involves winding and rewinding the wire suspended from the drum 23 via a pulley (not shown) or the like on which the drill rod is installed, thereby raising and lowering the drill rod.

[0005] On the other hand, the extension operation of the drill rod is performed by installing a rod holder device 24 below the manual chuck device 19,
An operation for fixing and holding the drill rod as needed by the rod holder device 24 is also involved.

The rod holder device 24 is a frame-shaped holder body.
25, a pair of holding pieces 26 are rotatably supported by a shaft 27, and the pair of holding pieces 26 have fan-shaped gear-shaped blade surfaces formed in an arc-shaped concave shape according to the drill rod diameter. By manually rotating the shaft 27 of the holding piece 26 from the upper side to the inner side by manually rotating the shaft 27 with a handle or the like,
The drill rods are clamped and held from both sides, and their fixing surfaces are released by rotating their blade surfaces in opposite directions.

As described above, it is necessary for the operator to perform both the operation of raising and lowering the drill rod and the operation of rotating the shaft 27 of the rod holder device 24.

[0008]

In this conventional device,
An operator who manually operates the operation levers 21 and 22 to raise and lower the drill rod and an operator who manually operates the shaft 27 of the rod holder device 24 to fix or release the drill rod are required.

Further, since the operator who operates the rod holder device 24 operates the pair of shafts 27 separately, it is not easy to fix and hold the drill rod at the optimum position of each holding piece 26.

Further, since a pair of holding pieces 26 in the frame-shaped holder body 25 must be fitted from the upper end or the lower end of the drill rod, the rod holder must be a drill rod opened from the manual chuck device 19. Device 24 cannot be installed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rod holder device capable of fixing or releasing fixing of a drill rod in addition to other manual operations. It is another object of the present invention to provide a rod holder device that can fix and hold a drill rod at an optimum position. Another object of the present invention is to provide a rod holder device that can be installed on a drill rod even during boring.

[0012]

According to the present invention, a drill rod for boring is fixedly held by a pair of holding pieces rotatably supported by a holder body via a pair of shafts. In a rod holder device, an interlocking mechanism that rotates a pair of shafts in opposite directions, a hydraulic actuator that drives the interlocking mechanism, and a switching valve that controls a working fluid supplied to the hydraulic actuator are provided. It is a rod holder device provided.

Then, while performing another manual operation such as raising and lowering of a drill rod, the operator remotely controls the fluid pressure actuator by a switching valve at hand to drive an interlocking mechanism, and a pair of shafts via a pair of shafts. The holding pieces are rotated in opposite directions to fix or release the fixing of the drill rod by the pair of holding pieces.

According to a second aspect of the present invention, the switching valve in the rod holder device according to the first aspect is manually operated by a foot lever.

Then, while one operator, for example, performs a manual operation related to lifting and lowering of the drill rod with both hands, the switching valve is manually operated by a foot lever to simultaneously perform a holder work for fixing or releasing the fixing of the drill rod. .

According to a third aspect of the present invention, there is provided a rod holder device according to the first aspect, wherein the interlocking mechanism includes a pinion integrally fitted to each of a pair of shafts, and a fluid pressure interlocked between the pinions. And a rack driven by an actuator.

Then, a pair of racks are driven by a fluid pressure actuator, and a pair of pinions meshing with the racks are interlocked to rotate the pair of holding pieces equally so that both holding pieces are optimally balanced. Hold the drill rod fixed in position. In addition, the shaft is detached from the holder body while each pinion is slid in the axial direction with respect to each rack, and a holding piece having a suitable blade surface is mounted according to a change in the diameter of the drill rod.

According to a fourth aspect of the present invention, in the rod holder device of the first aspect, the holder main body has a rod fitting opening formed in a side surface portion corresponding to a space between the pair of holding pieces.

The notch formed rod insertion opening is also inserted into the side of the holder body to insert the drill rod between the pair of holding pieces.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS.

As shown in FIGS. 1 to 4, a pair of grips 32 are integrally attached to both sides of the base plate 31 by welding, and a frame-shaped holder body 33 is welded to the center of the base plate 31 by welding. It is attached integrally.

A pair of shafts 34 are rotatably fitted in the holder main body 33, and these shafts 34 are attached to the holder main body 33.
A pair of holding pieces 35 fitted inside are fitted and integrated by a key 36. That is, the pair of holding pieces 35 are rotatably supported on the holder body 33.

As shown in FIGS. 1 and 4, the pair of holding pieces 35 are formed by forming a sector gear-shaped blade surface 37 into an arc-shaped concave shape in accordance with the diameter of the drill rod. A drill rod R for boring is fixed and held. Further, the base plate 31 and the holder main body 33 have a rod fitting opening 38 formed by cutting out a side surface portion corresponding to a space between the pair of holding pieces 35.

As shown in FIG. 1, the shaft 34 of the holding piece 35 is fitted to the holder main body 33 so as to be freely detachable, and is inserted into a locking ring 41 fitted to the insertion tip thereof. The pin 42 prevents the holder main body 33 from coming off. Therefore, by removing the pin 42 and removing the locking ring 41, the shaft 34 is
It is possible to remove from.

As shown in FIGS. 1 to 3, the pair of shafts 34 is provided with an interlocking mechanism 51 for rotating these shafts in mutually opposite directions. This interlocking mechanism 51 includes a pair of pinions integrally fitted on a pair of shafts 34, respectively.
52 and a pair of racks meshed between these pinions 52
53.

As shown in FIG. 1, the pinion 52 is fitted to the small diameter portion of the shaft 34,
Similarly, the flange 54 and the tapered member 54a are fitted into the small diameter portion, and the tapered member 54a is pushed between the pinion 52 and the small diameter portion of the shaft 34 by the flange 54 tightened by bolts, so that the pinion 52 is It is integrated with 34.

As shown in FIG. 1, the mounting structure of each rack 53 is such that a pair of guides 55 is fixed to the holder body 33 in the vertical direction by bolts, and a slider 56 is slidably fitted between these guides 55. An intermediate member 57 is integrated with the slider 56 by bolts, a mounting plate 58 is integrated with the intermediate member 57 by bolts, and a pair of racks 53 are integrated by bolts on both sides of the mounting plate 58. I have.

As shown in FIGS. 2 and 3, a cylinder body of a hydraulic cylinder 61 as a hydraulic actuator for driving the interlocking mechanism 51 is integrally attached to the mounting plate 58 by bolts. Of the piston rod 62 is connected and fixed to the projection 63 of the base plate 31. That is, this hydraulic cylinder for driving the rack
In 61, the piston rod 62 is fixed, and the cylinder body is moved up and down.

FIG. 5 shows a foot pedal 71 installed at the foot of the operator. The foot operation device 71 includes an operation device main body 72.
An L-shaped mounting plate 73 is fixed to an upper portion of the mounting plate 73 by a bolt. A switching valve 75 is mounted on the mounting plate 73 via a manifold 74 and is covered by a cover 76.

The switching valve 75 of the foot pedal 71 is provided in a pipe for connecting and connecting a hydraulic pump (not shown) provided to a hydraulic source such as a boring machine and the hydraulic cylinder 61 for driving the rack. This is a manually operated valve that is positioned and controls the direction of hydraulic oil as hydraulic fluid supplied from the hydraulic pump to the hydraulic cylinder 61 by rotating a valve lever 77 provided below the switching valve 75.

A base 81 of a foot lever 82 is rotatably supported in a vertical direction by a pin 81 inserted between side plates of the operating device main body 72 inside the operating device main body 72. The tip of the valve lever 77 and the middle of the foot lever 82 are
84 and link 85, and the actuator
A coil spring 88 is engaged between a locking portion 86 provided at an upper portion of the 72 and a locking portion 87 provided at an intermediate portion of the foot lever 82. A foot pedal 89 is provided at the tip of the foot lever 82.
Is installed.

Next, the operation of this embodiment will be described.

The present rod holder device is set concentrically below the drive rod 17 of the boring machine. At this time, the rod fitting opening 38 formed by cutting out the side surface of the holder body 33 is also provided for the drill rod R during boring.
To insert the drill rod R between the pair of holding pieces 35.

When performing the rod holder operation, the operator manually operates the operation levers 21 and 22 for raising and lowering the drill rod R with, for example, both hands, and switches the switching valve 75 of the foot operation device 71 installed at the foot. Is manually operated by the foot lever 82, the hydraulic cylinder 61 is remotely controlled by the switching valve 75, the pair of holding pieces 35 are driven by the hydraulic cylinder 61, and the fixing or fixing of the drill rod R by the pair of holding pieces 35 is performed. Perform the release holder work simultaneously by one person.

That is, when the foot pedal 89 of the foot lever 82 is depressed by the foot, and the foot lever 82 rotates downward against the coil spring 88, the valve lever 77 is also lowered via the link 85. The switching valve 75 pressurizes and supplies hydraulic oil to the head side (upper side) of the hydraulic cylinder 61 to raise the cylinder main body, and raises a pair of racks 53 integral with the cylinder main body. The blade surface 37 of the holding piece 35 is opened upward to release the fixed holding of the drill rod R.

On the other hand, when the foot is released from the foot pedal 89 of the foot lever 82, the foot lever 82
When the valve lever 77 pivots upward due to the restoring force of the valve lever 77, the valve lever 77 also pivots upward via the link 85.
Hydraulic oil discharged from the hydraulic pump is pressurized and supplied to the rod side (lower side) of the hydraulic cylinder 61 to lower the cylinder body and lower a pair of racks 53 integral with the cylinder body,
A pair of pinions 52 meshing with these racks 53 are driven in conjunction with each other, and a pair of holding pieces 35 are driven via a pair of shafts 34.
Are rotated equally and symmetrically in opposite directions so that their blade surfaces 37 rotate inward from the upper side to the drill rod R side, at a balanced optimal position for both holding pieces 35. The drill rod R is fixedly held so as to sandwich the symmetric position.

When replacing the holding piece 35, remove the pin 42 from the shaft 34, remove the locking ring 41, and
While sliding each pinion 52 in the axial direction with respect to 53, remove the shaft 34 from the holder body 33, replace the holding piece 35 with another, then insert the shaft 34 in the reverse operation,
With the pinion 52 attached to the shaft 34, the drill rod R
According to the change of the diameter, the holding piece 35 having the suitable blade surface 37 can be easily mounted again.

The hydraulic source of this rod holder device is as follows:
Since a hydraulic source of a boring machine, a hydraulic source mounted on a truck or a crane truck or the like is used, a dedicated hydraulic source is not required.

[0039]

According to the first aspect of the present invention, the fluid pressure actuator is remotely controlled by the switching valve to drive the interlocking mechanism, and the pair of holding pieces are rotated in mutually opposite directions via the pair of shafts. By doing so, it is possible to fix or release the drill rod together with other manual operations such as raising and lowering the drill rod, thereby improving workability.

According to the second aspect of the present invention, even if the hand is not enough for another manual operation, the switching valve can be manually operated by the foot lever to fix or release the fixing of the drill rod. Therefore, for example, the lifting and lowering operation of the drill rod and the holder operation can be performed simultaneously by one operator.

According to the third aspect of the present invention, the pair of pinions are interlocked by the rack driven by the fluid pressure actuator, and the pair of holding pieces are rotated equally.
The drill rod can always be fixedly held at the optimal position where both holding pieces are balanced. In addition, it is possible to attach and detach the shaft to and from the holder body while sliding each pinion in the axial direction with respect to each rack. Easy to install.

According to the fourth aspect of the present invention, the drill rod can be inserted between the pair of holding pieces from the rod insertion opening formed by cutting out the side surface of the holder main body. Can be installed to improve work efficiency.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an embodiment of a rod holder device according to the present invention.

FIG. 2 is a front view of the rod holder device.

FIG. 3 is a side sectional view of the rod holder device.

FIG. 4 is a perspective view of a holding piece mounting portion of the rod holder device.

FIG. 5 is a cross-sectional view of a foot pedal that remotely controls the rod holder device.

FIG. 6 is a perspective view showing a boring machine and a conventional rod holder device.

[Explanation of symbols]

 R Drill rod 33 Holder body 34 Shaft 35 Holding piece 38 Rod insertion opening 51 Interlocking mechanism 52 Pinion 53 Rack 61 Hydraulic cylinder as fluid pressure actuator 75 Switching valve 82 Foot lever

Claims (4)

[Claims] 1. A rod holder device for holding a drilling drill rod fixedly by a pair of holding pieces rotatably supported by a holder body via a pair of shafts, wherein the pair of shafts are moved in opposite directions. A rod holder device comprising: an interlocking mechanism that pivots to a hydraulic actuator; a fluid pressure actuator that drives the interlocking mechanism; and a switching valve that controls a working fluid supplied to the fluid pressure actuator. 2. The rod holder device according to claim 1, wherein the switching valve is manually operated by a foot lever. 3. The interlocking mechanism includes a pinion integrally fitted to each of a pair of shafts, and a rack meshed between the pinions and driven by a hydraulic actuator. 2. The rod holder device according to 1. 4. The rod holder device according to claim 1, wherein the holder main body has a rod-fitting opening cut out in a side surface corresponding to a space between the pair of holding pieces.