JP2001295574A - Rotating-driving device of rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform boring without adding another rod, by making a guide shell of a boring machine shorter than a rod for boring and by using a long length of rod. SOLUTION: A rotating-driving device 5 of the rod 7 gives rotation to the rod 7 for boring and also transmits thereto a feed given by a feeding mechanism. The device is provided with a hollow rotating part 8 through the inside of which the rod 7 having a groove 10 for rotation pierces, arms 14L and 14R which are supported pivotally in the hollow rotating part 8 and can engage with and disengage from the groove 10 and pistons 16L and 16R making the arms 14L and 14R engage with and disengage from the groove 10 of the rod 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod driving device for rotating and feeding a drilling rod.

[0002]

2. Description of the Related Art A drilling machine for drilling blast holes and the like in rocks includes:
A rock drill having a striking mechanism and a rotation mechanism is mounted on a guide shell, and a rod for drilling is connected to this rock drill,
A rock drill is used to strike and rotate the rod, a feed mechanism is used to feed the rock drill, and this is transmitted to the rod to perform drilling, or a down-the-hole drill having a hitting mechanism is used for drilling rods. Mounted on the guide shell, a rotation drive device for the rod having a rotation mechanism is provided at the distal end, and the rod is connected to the rotation drive device, the rod is hit with a down-the-hole drill, and the rotation is performed on the rod with the rotation drive device. In some cases, feed is given to a rotary drive device by a feed mechanism, and the feed is transmitted to a rod to perform perforation.

[0003] Generally, a drilling rod is connected to the front end of a rock drill or a rotary drive. That is, since the rock drill and the rotary drive are located behind the rod, the total length of the guide shell on which the rock drill and the rotary drive are mounted is the total length of the rod and the total length of the rock drill and the rotary drive. Is longer than the sum of

[0004]

In the bench cut method, the length of a blast hole drilled by a drill using a down-the-hole drill is generally about 10 to 18 m. Since the length of the rod for drilling is usually 6 to 9 m, when the drilling length is 10 to 18 m, it is necessary to add two or three rods during drilling, so extra time is required for the additional work. Be taken. After drilling, the added rod must be retrieved.

[0005] On the other hand, if a long rod corresponding to the perforation length can be used, it is not necessary to add and collect the rod, and the working efficiency can be improved. However, in conventional drilling machines, the total length of the guide shell is longer than the sum of the entire length of the rod and the total length of the rock drill and the rotary drive,
In order to use a long rod, a very long guide shell must be provided, and the mobility and safety of the bogie supporting the guide shell are impaired.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem in a drilling machine, and a guide shell of a drilling machine using a down-the-hole drill can be made shorter than a rod for drilling. It is an object of the present invention to provide a rod rotation driving device that can perform drilling without performing refilling of a rod and that can improve work efficiency.

[0007]

According to the present invention, there is provided a rod driving device for rotating a drilling rod and transmitting a feed given by a feed mechanism to the rod. The above object is achieved by providing a hollow rotating portion penetrating therethrough, an arm pivotally supported by the hollow rotating portion and capable of engaging with and disengaging from the rotating groove, and a piston for engaging and disengaging the arm with the rotating groove of the rod.

This rod rotation drive device is configured so that a rod for drilling penetrates through the inside of a hollow rotary portion, and applies rotation to the rod by engaging an arm with a groove for rotation of the rod. At the same time, the feed provided by the feed mechanism can be transmitted to the rod. The rotary drive only needs to be located in the middle of the rod, not behind the rod, so that the guide shell of the drilling machine can be shorter than the drilling rod, and the rod can be extended using a long rod. Drilling of a required drilling length can be performed without performing.

Therefore, it is not necessary to add and recover rods, which are complicated to operate, and the work efficiency is improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a drilling machine provided with a rod rotation driving device according to an embodiment of the present invention, and FIG.
FIG. 3 is a longitudinal sectional view showing the configuration of the rotary driving device, and FIG. 3 is a transverse sectional view of a portion of the rotating groove of the drilling rod. Drilling machine 1
Has a rotary drive device 5 mounted on a guide shell 4 supported by the tip of the boom 3 of the carriage 2. Rotary drive 5
Is moved up and down along the guide shell 4 by a feed mechanism 6 provided in the guide shell 4.

The rotary driving device 5 includes a hollow rotary portion 8 through which a rod 7 for piercing passes. The rod 7 is provided with a rotary driving device 5 and a centralizer provided at the distal end of the guide shell 4. 9 and supported. As shown in FIGS. 2 and 3, a rotating groove 10 is formed at a predetermined interval on the outer peripheral surface of the rod 7, and a down-the-hole drill (not shown) having a striking mechanism is provided at the tip of the rod 7. Is provided.

A gear 11 is fixedly mounted on the outer periphery of the hollow rotary portion 8 of the rotary drive device 5, is held in a casing 12 of the rotary drive device 5 via a bearing 13, and has a hydraulic motor (not shown). ) Makes it rotatable. An arm 14 pivotally supported by a pin 15 is provided below the hollow rotating portion 8.
L, 14R, pistons 16L, 16R for rotating the outer ends of the arms 14L, 14R by pushing them downward, and the arm 1
Push the outer ends of the 4L and 14R upwards to push the piston 16L and
And springs 17L and 17R for rotating the arms 14L and 14R in a direction opposite to that of the arm 16R.
The inner ends of the 4L and 14R are detachable from the rotation groove 10.

Here, the left and right arms 1 shown in FIG.
4L and 14R are configured to be opposite to each other, and when pressure oil is supplied to the oil chambers 18L and 18R of the pistons 16L and 16R, and the pistons 16L and 16R push the arms 14L and 14R downward, the upper left side in FIG. Arm 14L rotates counterclockwise to engage with the rotation groove 10, and the right arm 1
4R is rotated clockwise, and the engagement with the rotation groove 10 is released. In this state, the rotation driving device 5 can transmit the downward feed to the rod 7.

The oil chambers 18L, 1R of the pistons 16L, 16R
When the pressure oil is discharged from the 8R, the springs 17L, 17L
R pushes the arms 14L, 14R and the pistons 16L, 16R upward, the upper left arm 14L in FIG. 2 rotates clockwise to disengage from the rotation groove 10, and the right arm 14R moves counterclockwise. It rotates in the direction and engages with the groove 10 for rotation. In this state, the rotation driving device 5 can transmit the upward feed to the rod 7.

The rotation driving device 5 includes a piston 16
The left and right arms 14L, 14R both when the pressure oil is supplied to the oil chambers 18L, 18R of the L, 16R and when the pressure oil is discharged from the oil chambers 18L, 18R of the pistons 16L, 16R.
Since any one of R is engaged with the groove 10 for rotation, rotation can be given to the rod 7. At the time of the drilling operation, the drilling machine 1 positions the guide shell 4 at the drilling position and stands up, supplies pressure oil to the oil chambers 18L, 18R of the pistons 16L, 16R, and supplies the upper left arm 14L of FIG. Is rotated counterclockwise to engage with the groove for rotation 10, and the right arm 1
4R is rotated clockwise to release engagement with the rotation groove 10. In this state, the rod 7 is
, The rotation driving device 5 rotates the rod 7, and the feed mechanism 6 feeds the rotation driving device 5,
By transmitting this to the rod 7, drilling is performed on the rock.

In the case where a long blast hole is pierced by using a long rod 7, even if the rotary driving device 5 is moved from the rear end to the front end of the guide shell 4 by the feed mechanism 6, a predetermined piercing length is required. Does not reach. A plurality of rotation grooves 10 are formed in front and rear of the long rod 7 in accordance with the distance that can be sent by the feed mechanism 6. When the rotation driving device 5 moves to the front end of the guide shell 4, the oil of the piston 16 </ b> L Room 18L
And pressurized oil is supplied to the oil chamber 18R of the piston 16R to disengage the left and right arms 14L and 14R from the rotation grooves 10, and the rotation driving device 5 is connected to the guide shell 4 Returning to the rear end, the left arm 14L is engaged with the next rotation groove 10, and the hole is drilled again.

When the drilling of the required drilling length is completed, the pressure oil is discharged from the oil chambers 18L, 18R of the pistons 16L, 16R, and the upper left arm 14L in FIG. The engagement is released, and the right arm 14 </ b> R is rotated counterclockwise to engage with the rotation groove 10. In this state, the upward drive is transmitted to the rod 7 by the rotation driving device 5 and the rod 7 is pulled up.

The rotary driving device 5 is configured such that the rod 7 penetrates through the inside of the hollow rotary portion 8, and engages the arms 14 L and 14 R with the rotation groove 10 of the rod 7 to thereby rotate the rod 7. And the feed given by the feed mechanism 6 can be transmitted to the rod 7. The rotary drive 5 is not located behind the rod 7 but
The guide shell 4 of the drilling machine 1 can be shorter than the drilling rod 7. For example, even if it is about 60% of the rod length of the long rod, there is no problem, and it is possible to pierce using the long rod 7 without impairing the traveling performance and stability of the carriage 2. Therefore, it is possible to perform drilling of a required length without adding the rod 7, and it is not necessary to add and collect the rod 7 which is complicated in operation, thereby improving work efficiency.

[0019]

As described above, the rod driving apparatus of the present invention can shorten the length of the guide shell of a drilling machine using a down-the-hole drill compared to a rod for drilling, and can use a long rod. Drilling can be performed without adding a rod, and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a drilling machine provided with a rod rotation driving device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a configuration of a rotary drive device.

FIG. 3 is a cross-sectional view of a part of a rotating groove of a drilling rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling machine 2 Bogie 3 Boom 4 Guide shell 5 Rotation drive device 6 Feeding device 7 Rod 8 Hollow rotation part 9 Centralizer 10 Rotation groove 11 Gear 12 Casing 13 Bearing 14L, 14R Arm 15 Pin 16L, 16R Piston 17L, 17R Spring 18L, 18R oil chamber

Claims (1)

[Claims] 1. A method for imparting rotation to a drilling rod,
A rod rotation driving device for transmitting a feed provided by a feed mechanism to a rod, wherein the rod having a rotation groove penetrates the inside, a hollow rotation portion pivotally supported by the hollow rotation portion, and is freely detachable from the rotation groove. And a piston for engaging and disengaging the arm with the rotation groove of the rod.