JPH0131668Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a rod guide device for a rock drill.

[Prior art]

Generally speaking, a rock drilling machine uses a drifter to apply impact force to the drilling rod to drill a hole.
When drilling a deep hole, the length of the drilling rod itself is usually about 3 m, so multiple connecting rods are inserted and connected between the drilling rod and the drifter to extend the entire length of the rod. It needs to be longer.

Conventionally, there has been a rod changing device that automatically connects and disconnects the above-mentioned connecting rod, but this device is undesirable because of its high cost. On the other hand, the work of connecting and disconnecting the connecting rod is performed by the operator, and there are rod guide devices that make this work easier. There is a device in which a guide arm is provided on one side of the guide cell, and this guide arm is rotated in a horizontal plane so that the arm guides the movement of the connecting rod.

However, with this conventional rod guide device,
If the position of the guide part of the guide arm is set at the height of the rod connecting part of the drifter, the locking part and the connected rod will interfere when the guide arm is rotated back. The rod connecting portion of the drifter is set lower than the rod connecting portion of the drifter, and therefore, when disconnecting the rod, it is necessary for the operator to lift and hold the heavy rod by hand, which is very inconvenient.

[Purpose of invention]

In view of these problems, this invention aims to provide a rod guide device for a rock drill that allows the rod to be connected and removed without lifting and holding the rod.

[Structure of the idea]

Therefore, in this invention, a rod guide arm is provided on one side of the guide cell of the rock drill so as to be horizontally rotatable, and a locking arm that has a locking part on the other side of the guide cell and can be connected to the guide arm. is provided so that it can freely rotate horizontally, and both arms are connected by a link bar so that they can be operated in conjunction.This prevents interference between the locking part and the rod when the arm returns to rotation, and prevents the guide arm from rotating. The position of the guide part can be set at the height of the rod connecting part of the drifter.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show a rock drill rod guide device according to an embodiment of the present invention, in which:
Reference numeral 1 denotes a guide cell of a rock drill consisting of opposing left and right channel steels 1a and 1b. A drilling rod 2 is mounted on the guide cell 1, and a drifter is installed at the rear end of the guide cell 1. 3 is arranged, and the drifter 3
The rear end of the drilling rod 2 is detachably connected to the rod connecting portion 3a.

The guide cell 1 has a rod guide device 4.
is provided. In this rod guide device 4, a joint rod 5 is provided on the right side of the guide cell 1.
Front and rear rod racks 6 and 7 are tightened and fixed, and a stopper arm 8 for preventing the splicing rod 5 from falling off is attached to the rear rod rack 7 on a vertical shaft 8.
It is rotatably provided around a. A bracket 9 is fastened to the right side of the guide cell 1 at approximately the center thereof, and a substantially inverted L-shaped guide arm 10 is provided on the bracket 9 so as to be rotatable around a vertical shaft 10a. The guide arm 10 and the vertical shaft 10a are fixed to each other by engaging a bolt with a spring interposed in the middle and a notch in the vertical shaft 10a, so that when a large impact is applied to the guide arm 10, The arm 10 and the vertical axis 1
The engagement with 0a is released. Further, the guide arm 10 is formed with a guide portion 10b for guiding the connecting rod 5, and the upper surface position of the guide portion 10b is set at the height of the rod connecting portion 3a of the drifter 3.

On the other hand, a bracket 11 is fastened and fixed to the left side of the guide cell 1 in opposition to the bracket 9, and a locking arm 12, which is also approximately inverted L-shaped, is attached to the bracket 11 and rotates around a vertical shaft 12a. The locking arm 12 is freely provided, and the locking arm 12 is connected to the guide arm 1.
Can be concatenated with 0. This locking arm 12
is a vertical shaft 12a in the same manner as the guide arm 10 described above.
A substantially C-shaped locking portion 12b is formed at the tip of the locking arm 12, and the locking portion 12b has a substantially C-shaped locking portion 12b formed by bonding an elastic body and a spring to each other. A C-shaped rod clamper 13 is fixed with bolts or the like.

Further, one end of a link bar 15 is connected to the lower end of the vertical shaft 12a of the locking arm 12 via a bracket 14, and the other end of the link bar 15 is connected to the vertical shaft 10a of the guide arm 10 via an L-shaped bracket 16. The guide arm 1 is connected to the lower end of the guide arm 1.
0 and the locking arm 12 are provided so that they can be operated in conjunction with each other. Further, the front rod rack 6 is provided with an operating lever 17 rotatable around a horizontal shaft 17a, and the front rod rack 6 is provided with a guide groove 6a for guiding and locking the rotation of the operating lever 17. ing. The lower end of this operating lever 17 is connected via a wire rope 18 to the tip of an L-shaped bracket 16 at the lower end of the guide arm 10, and the tip of the L-shaped bracket 16 is also connected to a wire rope 19.
is connected to a bracket 20 at the lower end of the vertical shaft 8a of the stopper arm 8, and the bracket 20
A spring 21 is disposed between the rear end of the rear rod rack 7 and the rear end of the rear rod rack 7.

Next, the operation will be explained.

The solid lines in FIGS. 1 and 2 indicate the non-use state of the device. In this state, the operating lever 17 is tilted forward and the L-shaped bracket 1 at the lower end of the guide arm 10 is
6 is pulled backward by the spring force of the spring 21, that is, to the right side in FIGS. 1 and 2, and the guide arm 1
0 is in a state substantially parallel to the guide cell 1. Further, the bracket 14 at the lower end of the locking arm 12 is connected to an L-shaped bracket 16 by the action of the link bar 15.
The locking arm 12 rotates in the direction of the arrow B shown in the figure in conjunction with this, and the locking arm 12 is also in a state substantially parallel to the guide cell 1. Furthermore, the bracket 20 at the lower end of the stopper arm 8 is also pulled rearward by the spring force of the spring 21, so that the stopper arm 8 is in a state where it straddles the upper end opening of the rod rack 7.

When connecting the joint rod 5, the operating lever 17 is rotated rearward and locked to the rear end of the guide groove 6a. Then, L at the lower end of the guide arm 10
The bracket 16 rotates in the direction of arrow A around the vertical axis 10a as the operating lever 17 rotates, and at the same time, the bracket 14 at the lower end of the locking arm 12 is rotated to the L-shaped bracket 16 by the action of the link bar 15.
The guide arm 10 and the locking arm 11 rotate around the vertical shafts 10a and 12a in the directions of arrows D and E, respectively. and both arms 10, 12
are connected to each other as shown by the dashed line in FIG. 1 and the solid line in FIG. At the same time, the bracket 20 at the lower end of the stopper arm 8 rotates in the direction of arrow C as the operating lever 17 rotates, and the stopper arm 8 also rotates in the direction of arrow C, as shown by the dashed line in FIG. The rod rack 7 is in a state away from the opening on its upper surface. In this state, the operator lifts the splicing rod 5 from the rod racks 6 and 7, places it on the guide portion 10a of the guide arm 10, moves it toward the center on the guide portion 10a, and moves it toward the locking portion 12b of the locking arm 12. When the joint rod 5 is brought into contact with and locked in the rod, the joint rod 5 is located on the axis of the rod connecting part 3a of the drifter 3, so in this state, the joint rod 5 can be easily attached to the connecting part 3a of the drilling rod 2 and the drifter 3. Can be linked. When the connection of the connecting rod 5 is completed, remove the operating lever 17 from the rear end of the guide groove 6a and rotate it forward.
This device performs the operation completely opposite to the above, and
Return to the original state shown in the figure.

Furthermore, when removing the connecting rod 5, the connecting rod 5 can be easily removed using this device by operating the operating lever 17 in the same manner as described above.

In the device of this embodiment as described above, the guide arm is disposed on the left side of the guide cell, and the locking arm is disposed on the right side, and when in use, both arms are horizontally rotated and connected. It is possible to reliably prevent the locking part of the locking arm from interfering with the joint rod after connection when the arm returns to rotation. As a result, the position of the guide part of the guide arm can be set at the height of the rod connection part of the drifter, which allows the rod to be uncoupled without having to lift and hold the rod.

In addition, in this device, the guide arm and the locking arm are removably fixed to their vertical shafts, so
If a worker accidentally activates the drifter with both arms in use, the drifter hits both arms, which releases the fixation of both arms and causes them to rotate around their vertical axes. As a result, damage to the device due to erroneous operation can be prevented.

In addition, in the above embodiment, the guide arm is provided with a guide part,
Although the locking portion is formed on the locking arm, in the present invention, a part of the guide portion of the guide arm may be formed on the locking arm side. Further, the interlocking operation of the guide arm and the locking arm may be performed automatically instead of manually.

[Effect of idea]

As described above, according to the rod guide device for a rock drill according to the present invention, the rod guide arm is provided on one side of the guide cell of the rock drill so as to be horizontally rotatable, and is locked on the other side of the guide cell. A locking arm that has a horizontal section and can be connected to the guide arm is provided so that it can rotate freely horizontally, and both arms are connected with a link bar so that they can be operated in conjunction, so the rod can be connected and removed without having to lift and hold it. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of a rock drill rod guide device according to an embodiment of the present invention, FIG. 2 is a side view of the device, and FIG. 3 is a front view of the device. 1... Guide cell, 2, 5... Rod, 3...
Drifter, 3a... Rod connecting portion, 4... Rod guide device, 6, 7... Rod rack, 10... Guide arm, 12... Locking arm, 12b... Locking portion, 15... Link bar.

Claims (1)

[Scope of utility model registration request] A rod rack for storing the rod is provided on one side of a guide cell of the rock drill, and a guide arm for guiding the movement of the rod is provided on one side of the guide cell so as to be rotatable in a horizontal plane. is,
On the other side of the guide cell, a locking arm that can be connected to the guide arm is rotatably provided in a horizontal plane, and the locking arm locks the rod approximately on the axis of the rod connecting portion of the drifter. A rod guide device for a rock drill, characterized in that a locking portion is formed for locking the rock drill, and the guide arm and locking arm are connected by a link bar for interlocking operation of both arms.