JP2001220985A - Alignment device for rock drill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alignment device capable of connecting a drifter and a rod aligned with each other by moving the drifter to a set position regardless of the position of the drifter in the course of drilling when the drilling rod is added to the drifter. SOLUTION: The threadedly engaged section of the drifter and that of an added rod conveyed by a rod changer are aligned with each other by raising the drifter to the set position by means of the clamp member mounted at the tip of a drill mounting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock drilling machine for driving a rod into a drilled wall, and more particularly to an apparatus for centering a rod to be added when driving a rod.

[0002]

2. Description of the Related Art In recent years, there has been a demand for a longer lock bolt (rod) to be driven into a tunnel wall.

In such a case, since the length of one rod is insufficient, it is necessary to add and drive in the middle of the rod. Normal,
After driving the previous rod into the tunnel wall, disconnect the previous rod and the drifter, retreat the drifter,
Bring the next rod between the previous rod and the drifter,
The male thread of the other rod is screwed and connected to the female thread of one rod, and the next rod is connected to the drifter. Then, driving the drifter, the connected rod is also driven into the tunnel wall.

[0004]

Generally, when one rod and the other rod are screwed together and the rod and the drifter are screwed together, it is necessary that the centers (cores) of the rods coincide with each other. Normally, when a refilling (rear) rod is carried between the preceding rod and the drifter by a rod changer or the like, the latter rod is set to a set position with respect to the guide cell. Also, since the rear end of the previous rod is supported by the centralizer attached to the guide cell, it is supported at a predetermined position, so that the rear end of the previous rod and the front end of the rear rod are easily aligned. It is.

[0005] However, since the working posture of the rock drill changes depending on the direction and shape of the tunnel wall, the position of the drifter is not stable. In addition, since the drifter slides on the guide cell while being driven, if used for a long period of time, the initial position of the tip of the drifter cannot be maintained due to wear and rattling of the sliding portion. Therefore, the cores of the rear end of the later rod and the front end of the drifter do not match each other. Since it is difficult to match the cores of the later rod and the tip of the drifter, it takes much time to add the rods.

[0006] An object of the present invention is to provide a technique for surely performing the alignment and for easily connecting the rod and the drifter.

[0007]

According to the first aspect of the present invention,
A base member slidable on the guide cell, a centralizer provided at the distal end of the guide cell, a drifter mounted on the base member, and a rod connected to the distal end of the drifter and supported by the centralizer. A rock drill having a centering mechanism attached to a tip of the base member, the centering mechanism being capable of lifting the base member to a predetermined position with respect to the guide cell; And driving means for operating the.

In this configuration, when the rod is connected to the drifter, the tip of the drifter can be kept at a fixed position with respect to the guide cell regardless of the position of the tip of the drifter in use. Alignment with the rod can be easily performed.

According to a second aspect of the present invention, in the centering device of the rock drill according to the first aspect, the clamp member is rotatable in a direction perpendicular to the guide cell, and the base member is raised by contacting the guide cell. It has a clamp claw to be stopped and a stopper for regulating the rotation position of the clamp claw. The tip of the drifter can be lifted to a predetermined position using the clamp claw, so that the position of the drifter is always stable with respect to the guide cell. It is held in the position that was set.

According to a third aspect of the present invention, in the centering device for a rock drill according to the first or second aspect, the base member has a box-like shape fixed to both sides of a tip of the base member.
A U-shaped groove through which a rod passes by the two support frame portions and the horizontal frame portion connecting the support frame portions to each other; The member is rotatably mounted on the support frame portion, and the cylinder is housed in a box-shaped portion of the support frame portion.

In this configuration, since the support frame is formed robustly and the cylinder is housed in the support frame, there is no positional change due to something hitting the cylinder during operation of the rock drilling machine, and accurate Can maintain position.

[0012]

According to the present invention, when the rod 13 is extended,
Since the drifter 7 is set at a predetermined position irrespective of the position of the drifter 7 during the work, the centering with the extension rod 13 can be performed accurately and easily.

In particular, according to the first aspect of the present invention, when the drifter 7 is lifted for the purpose of adding the rod 13, the rod 13 is held at a reliable position, so that the rod 13 and the drifter 7 can be accurately joined.

According to the second aspect of the present invention, the extension rod 13
Even when the core position of the drifter 7 differs from that of the drifter 7, the position of the drifter 7 can be readjusted by moving and adjusting the stopper 27.

According to the third aspect of the present invention, since the hydraulic cylinder 24, which is the driving means of the clamp claw 18, is covered by the sturdy support frame 15, rock hits and deforms.
It is possible to prevent the dust in the drilling from fogging and malfunctioning.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a substantially entire structure of a rock drill 1, and a feed cell 3 is provided at an end of a rock drill body via an arm 2.

FIG. 2 shows a side view of the feed cell 3 of the rock drill 1, in which a centralizer 5 is attached to the tip of a base frame 4 of the feed cell 3, and a guide cell 6 is provided on the base frame 4. Have been. A drill mountain 8 as a base member of the drifter 7 is slidably mounted on the guide cell 6, and the drill mountain 7 is attached to the drill mountain 8. A rod stopper 9 is provided after the centralizer 5 to position a connecting portion of the rod 10. In this embodiment, since the rod 10 is long, an idler centralizer 11 is slidably mounted on the guide cell 6 on the way. A rod changer 12 is attached to the side of the guide cell 6.

When the drifter 7 is driven forward from the state before drilling shown in FIG. 2 which explains the operating state of this embodiment with reference to FIGS. 2 to 6, as shown in FIG. Is driven. In this state, the screw engagement between the female screw 10a of the rod 10 and the male screw 7a of the drifter 7 is released, and the drifter 7 retreats. At this time, the retreat position of the drifter is determined according to the length of the next rod 13. The next rod 13 is moved between the previous rod 10 and the drifter 7 using the rod changer 12. As shown in FIG. 4, the internal thread 10a of the rod 10 and the rod 13
Male screw 13a. Then, the drill mounting 8 is lifted by the clamp member 14, and the male screw portion 7 a of the drifter 7 is connected to the female screw portion 1 of the rod 13.
3b. When the setting is completed, the connection between the drifter 7 and the later rod 13 is performed.

When the connection is completed as shown in FIG. 5, the clamp member 14 is released, and the drill mounting 8 is returned to the original state. After the drill mounting 8 is returned to a state in which it can slide on the guide cell 6, the drifter 7 is driven to move forward as shown in FIG.
3 is also driven into the tunnel wall T. Thereby, the long rods 10 and 13 are smoothly driven into the tunnel wall T. If the rod length is insufficient, the rod is further extended, and the same operation is repeated. When the operation for this hole is completed, the same operation is performed for the next hole.

Although the position of the drifter 7 changes depending on the length of the rod to be added, in the present invention, the centering mechanism S is provided at the tip of the drill mounting 8 to which the drifter 7 is attached. The centering mechanism S also moves as it moves. Therefore, regardless of the slide position of the drifter 7, the drifter 7 is always maintained at a predetermined position with respect to the guide cell 6.

Next, details of the centering mechanism S will be described with reference to FIGS.

As shown in FIG. 7, the support frame 15
And a support member 17 having a horizontal frame portion 16 connecting the support frame portions 15 to each other, and having a substantially H-shaped cross section,
It is fixed to the tip of the drill mounting 8. A clamp claw 18 having a substantially V-shaped cross section is rotatable in a direction perpendicular to the guide cell 6 so as to surround two substantially V-shaped portions of the guide cell 6 from the outside (in a plane perpendicular to the guide cell 6). (Rotatable) to the support frame 15. The tip 19 of the clamp claw 18 is supported by the support member 17, and the upper arm 20 is attached to the upper surface 6 a of the guide cell 6.
The lower arm 21 is arranged along the lower surface 6b of the guide cell 6.

When the upper arm portion 20 of the clamp claw 18 is retracted from between the support portion 22 of the clamp claw 18 and the upper surface portion 6a of the guide cell 6, the support portion 22 of the clamp claw 18 is
The gap between the guide cell 6 and the upper surface 6a is small, and the drill mounting 8 is slidably supported by the guide cell 6. On the other hand, the upper arm portion 20 of the clamp claw 18
Is located between the shaft support portion 22 of the clamp claw 18 and the upper surface portion 6a of the guide cell 6, the drill mounting 8
Is lifted and floated from the guide cell 6. At this time, since the upper arm 20 is along the upper surface 6a of the guide cell 6 and the lower arm 21 is along the lower surface 6b of the guide cell 6, the position of the drill mounting 8 does not fluctuate.

A hydraulic cylinder 24 as a driving means of the clamp claw 18 is housed in a box-shaped support frame 15, and the upper end 24 a is supported by the support frame 15. The distal end of the piston rod 25 extending downward is connected to the intermediate portion 23 of the clamp claw 18. Since the hydraulic cylinder 24 is housed in the support frame 15, there is no danger that the hydraulic cylinder 24 will be deformed by hitting rocks or something during drilling, or will be covered with sand or dust.

A stopper pin 26 is mounted on the clamp claw 18 so as to protrude in the longitudinal direction of the guide cell 6. A stopper 27 is attached to the support frame 15 so as to be rotatable in a direction perpendicular to the guide cell 6, and an adjustment bolt 28 for adjusting the stop position of the stopper 27 is provided on the support frame 15. By moving the position of the adjustment bolt 28, the stop position of the stopper 27 is adjusted.

Next, the operation will be described.

When the rod 13 is extended, after the extension rod 13 is carried in and set at a predetermined position, hydraulic pressure is supplied by remote control so that the piston rod 25 of the hydraulic cylinder 24 is extended downward. As a result, the clamp claw 18 rotates in a direction to hold the guide cell 6. That is, the upper arm portion 20 of the clamp claw 18 contacts the upper surface portion 6a of the guide cell 6, and the piston rod 25 further extends downward, so that the upper arm portion 2 of the clamp claw 18
0 runs on the upper surface 6a of the guide cell 6.
As a result, the shaft support portion 22 of the clamp claw 18 is lifted, and the tip of the drill mounting 8 is
The result is a slight rise from By this lifting operation, the drifter 7 is always held at a fixed position with respect to the guide cell 6. Since the internal thread portion 13b of the extension rod 13 is also loaded and set at the same height, the internal thread 13b of the extension rod 13 and the external thread 7a of the drifter 7 are set.
Have the same axial center (core). In this state, the drifter 7
Are driven, the screwing with each other is performed accurately and in a short time.

On the other hand, when the extension of the rod 13 is completed, the hydraulic cylinder 24
The hydraulic pressure is introduced in the direction in which 5 rises. As the piston rod 25 rises, the upper arm portion 20 of the clamp claw 18
Pivots away from the upper surface 6a of the guide cell 6,
The lower arm 21 rotates in a direction away from the lower surface 6b of the guide cell 6. As a result, the drill mounting 8 is lowered and slidably set on the guide cell 6. Then, the drill mounting 8 to which the drifter 7 is attached slides on the guide cell 6 to perform a normal operation.

During normal operation of the drifter 7, the clamp claw 18 is released, so that the tip of the drifter 7 is slightly lowered, and the traveling direction of the rod 13 is slightly changed. There is room to allow, and this change does not affect the actual drilling operation.

The connection between the rods and the connection between the rod and the drifter are not limited to the screw connection of the above embodiment, but may be another connection structure. In this embodiment, the drill mounting is floated by the upper arm of the clamp claw riding on the upper surface of the guide cell. However, the present invention is not limited to this structure, and another structure may be used.

In this embodiment, the drill mounting is lifted, but the lifter may be lifted directly.

Although the present invention has been described with respect to a rock drill for drilling a tunnel, the present invention is not limited to drilling a tunnel but can be applied to other drilling devices.

[Brief description of the drawings]

FIG. 1 is a side view showing substantially the entire rock drill.

FIG. 2 is a side view of a feed cell portion of the rock drill.

FIG. 3 is a side view of a feed cell portion of a rock drill, illustrating a first stage at the time of rod extension.

FIG. 4 is a side view of a feed cell portion of the rock drill, illustrating a second stage at the time of rod extension.

FIG. 5 is a side view of a feed cell portion of the rock drill showing a completed rod replenishment state.

FIG. 6 is a side view of a part of a feed cell portion of the rock drill showing a drilling state after rod addition.

FIG. 7 is an enlarged side view of a portion of a clamp mechanism attached to a guide cell.

FIG. 8 is a front view showing a part of the clamp mechanism with a part cut away.

[Explanation of symbols]

 T Tunnel wall 1 Rock drill 2 Arm 3 Feed cell 4 Base frame 5 Centralizer 6 Guide cell 6a Upper surface part 6b Lower surface part 7 Drifter 7a Male screw part 8 Drill mounting 9 Rod stopper 10 Front rod 13 Rod after 13a Male Screw part 13b Female thread part 11 Idle centralizer 12 Rod changer S Centering mechanism 14 Clamp member 15 Support frame part 16 Horizontal frame part 17 Support member 18 Clamping claw 19 Tip part 20 Upper arm part 21 Lower arm part 22 Shaft support 23 Middle Part 24 Hydraulic cylinder 24a Upper end part 25 Piston rod 26 Stopper pin 27 Stopper 28 Adjustment bolt

Continued on the front page (72) Inventor Shuji Saito 2-1-26-1 Niho, Minami-ku, Hiroshima-shi, Hiroshima F-term (reference) 2D065 AB02 AB21

Claims (3)

[Claims] 1. A base member slidable on a guide cell, a centralizer provided at a distal end of the guide cell, a drifter mounted on the base member, and connected to a distal end of the drifter. A rock drill having a supported rod, having a centering mechanism attached to a tip of the base member, wherein the centering mechanism can lift the base member to a predetermined position with respect to the guide cell. And a driving means for operating the clamp member. 2. The centering device of a rock drill according to claim 1, wherein the clamp member is rotatable in a direction perpendicular to the guide cell, and abuts on the guide cell to raise the base member. A centering device for a rock drill, comprising: a claw; and a stopper for restricting a rotation position of the clamp claw. 3. The centering device for a rock drill according to claim 1, wherein a support member is fixed to a tip of the base member, and the support member is fixed to both sides of the tip of the base member. Box-shaped two supporting frame portions and a horizontal frame portion connecting the supporting frame portions to each other, and a rod through which the rod passes by the two supporting frame portions and the horizontal frame.
The clamp member is rotatably attached to each support frame portion, and the driving means comprises a hydraulic cylinder housed in a box-shaped portion of the support frame portion. Rock drilling machine.