JPH0513831Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a dust collection device for a rock drilling machine that collects dust from around the hole on the surface of the hole covering the powder generated when drilling into rock.

(Prior art) Conventionally, dust collectors for this type of rock drilling machine include:
For example, as described in Japanese Utility Model Application Publication No. 59-35491,
A hood fixed in a fixed direction is provided at the tip of the guide cell on which the drifter is mounted so that it can move forward and backward, and a drilling rod is inserted into the hood, and a suction port is inserted into the suction port of the hood. There is a dust collector that communicates with a dust collector through a duct.

However, the conventional device described above has the following problems.

In other words, when drilling a hole diagonally in rock using the bit at the tip of the drilling rod mentioned above, because the orientation of the hood is fixed, a gap is inevitably formed between the rock and the hood rubber at the tip of the hood. , the powder leaks out from this gap,
This has the problem of deteriorating the working environment and deteriorating the dust collection effect.

(Purpose of the invention) This invention automatically controls the orientation of the hood to ensure that the hood rubber at the tip of the hood is always in contact with the rock that serves as the covering hole surface, preventing the formation of gaps and improving the dust collection effect. The purpose of the present invention is to provide a dust collector for a rock drill that can prevent deterioration and also prevent deterioration of the working environment.

(Structure of the invention) In this invention, a hood through which a drilling rod can be inserted is provided at the tip of a guide cell on which a drifter is mounted so that it can move forward and backward, and a suction duct that communicates with a dust collector is connected to the hood. In the dust collector for a machine, the hood is mounted on a guide cell so that the direction of the hood can be changed, a first driving means for changing the direction of the hood is provided, and the first drive means is provided to change the direction of the hood, and the first driving means is provided to change the direction of the hood. A control means is provided for controlling the drive means and for controlling the orientation of the hood to be approximately perpendicular to the bedrock, and the control means includes an actuation mechanism that is activated in accordance with the tilting movement of the guide cell, and an actuation mechanism of this actuation mechanism. The present invention is characterized in that the dust collector for a rock drill comprises a second drive means that drives the first drive means in accordance with the operation.

(Effect of the invention) According to this invention, when the inclination of the guide cell is varied during drilling, the actuating mechanism follows the inclination of the guide cell, and the second drive Since the means drives the first drive means, the hood can be automatically modulated to be in a gap-free state, that is, in an orientation substantially perpendicular to the bedrock.

As a result, the tip of the hood rubber fixed to the tip of the hood can touch the rock in a state almost parallel to the rock, and no gap is formed between the rock and the tip of the hood rubber, reducing the deterioration of the dust collection effect. In addition, the powder does not leak out from the gap as in the conventional case, which has the effect of preventing deterioration of the working environment.

(Example) An example of this invention will be described in detail below based on the drawings.

The drawing shows a dust collection device for a rock drill, and in FIG.
A boom 4 is attached to the front of the traveling trolley 2 via a support member 3 so as to be able to swing vertically and horizontally.

This boom 4 is moved by a boom lift cylinder 5 (hereinafter simply referred to as BL cylinder) and a boom swing cylinder (not shown).
A guide cell 7 is connected to the free end of the shaft 6 via a rotation fulcrum shaft 6.

This guide cell 7 has a cell lift cylinder 9 (hereinafter simply SL) stretched between the back side of the guide cell 7 and a bracket 8 integrally formed with the boom 4 described above.
It is configured to be able to move up and down and move laterally by means of a cylinder (referred to as a cylinder) and a cell swing cylinder (not shown).

Between the above-mentioned support member 3 and boom 4, there is a BL
A boom lift pilot cylinder 10 (hereinafter simply referred to as a BLP cylinder) that follows the movement of the cylinder 5 is suspended.

In addition, between the tip of the boom 4 and the back of the guide cell 7, there is a cell lift pilot cylinder 11 (hereinafter simply referred to as
(referred to as SLP cylinder) is stretched.

By the way, the above-mentioned guide cell 7 has a drifter 1.
A drilling rod 13 is attached to this drifter 12, and a bit 14 is attached to the tip of this drilling rod 13, and impact force and rotational force are applied to this bit 14 by the above-mentioned drifter 12. It is configured to be energized.

Further, the tip of the above-mentioned drilling rod 13 is supported by a centralizer 15, while a footpad 16 is provided at the tip of the guide cell 7, and a dust-collecting hood 17 is attached to the footpad 16.

In other words, as shown in FIG.
The above-mentioned hood 17 is attached via the hood 9 so that its direction can be changed.

This hood 17 is structured so that the above-mentioned hole rod 13 can be inserted through the center thereof.

As shown in FIG. 2, the above-mentioned hood 17 has a hard cylindrical hood main body 20 with a suction port 21, and a connecting ring 22 and fasteners 23 such as bolts and nuts at the tip of the hood main body 20. A skirt-like hood rubber 24 is attached through the hood.

In addition, a dust collector (not shown) in the traveling vehicle 2 is connected to the above-mentioned suction port 21 via a suction duct 25 (see Fig. 1), and a dust collector (not shown) in the traveling vehicle 2 is connected to the suction port 21 to prevent recirculation that occurs when drilling into the bedrock 26 as the hole surface to be drilled. The powder is collected from the inside of the hood 17 through the suction port 21 and the suction duct 25 to the above-mentioned dust collector.

Furthermore, the above-mentioned hood body 2 in the hood 17
A pair of annular plates 27 and 28 are fixed to the base end side of the 0, and a bellows-shaped seal rubber 29 is attached between each of these annular plates 27 and 28.

This seal rubber 29 has a hole (not shown) in the center for insertion of the drilling rod 13, and a plurality of slits (not shown) extending radially from this hole by a predetermined width. It has a function of sealing the drilling rod 13 and the inside of the hood 17 even when the direction of the hole is changed.

In the hood 17 configured in this manner, a rod connecting pin 30 is provided protruding from the proximal end side (on the right side in FIG. 2) of the hood support shaft 19, and a rod connecting pin 30 is provided between the rod connecting pin 30 and the aforementioned foot pad 16. A hood cylinder 31 serving as a first driving means for changing the direction of the hood 17 is stretched over the hood.

Next, FIG. 3 shows the configuration of a hydraulic circuit 32 as a control means for controlling the above-mentioned hood cylinder 31 according to the inclination of the guide cell 7 and controlling the direction of the hood 17 to be approximately perpendicular to the rock 26. The details will be explained based on the following.

First hood operation adjustment valve 33 formed by a tandem center 3-position 4-port flow rate directional control valve
The hydraulic pump 34 is connected to the P port P, the tank 35 is connected to the T port T, the head side chamber of the hood cylinder 31 is connected to the A port A via lines 36 and 37, and the hood cylinder is connected to the B port B via lines 38 and 39. 31 rod side chambers are connected to each other.

Here, the above-mentioned first hood operation adjustment valve 33
When the hood cylinder 31 is manually operated, it is switched to the left position and the right position, and when the hood cylinder 31 is automatically controlled in direction, it is set to the normal position shown in FIG. 3.

In addition, the above-mentioned line 39 is connected to the first port 41 of the second hood operation adjustment valve 40 formed by a two-position, four-port flow rate directional control valve, and the second port 42
The head side chamber of the BLP cylinder 10 is connected to the head side chamber of the BLP cylinder 10 via the line 45, the rod side chamber of the SLP cylinder 11 is connected to the third port 43, and the line 47 is connected to the fourth port 44. through the rod side chamber of the BLP cylinder 10 and through lines 47 and 48 to the SLP cylinder 11.
The head and side chambers are connected to each other.

Here, the above-mentioned second hood operation adjustment valve 40
is set to the left position shown in FIG. 3 when the hood 17 is automatically variably controlled in accordance with the movement of the guide cell 7, and is set to the right position when manually operated.

The illustrated embodiment is configured as described above,
The action will be explained below.

Now, a rock mass 26 is erected in an inclined manner as shown in Fig. 2.
When drilling from a substantially lateral direction, when the BL cylinder 5 is extended and each element is set as shown in FIG. 2, the piston rod 10a of the BLP cylinder 10 will also protrude following the BL cylinder 5 described above.

Due to this protrusion of the piston rod 10a,
The hydraulic oil in the rod side chamber of the BLP cylinder 10 flows into the head side chamber of the hood cylinder 31 via each element 47, 44, 43, 37 and causes the piston rod 31a of the hood cylinder 31 to protrude.
The hood 17 is centered on the hood support shaft 19 in FIG.
Rotate it counterclockwise as shown in the diagram so that it faces downward.

As a result, the tip opening of the hood rubber 24 fixed to the tip of the hood 17 becomes approximately parallel to the rock 26.

Therefore, the aforementioned bit 14 is applied with striking force and rotational force by the drifter 12 to drill a hole in the rock 26.

When this hole is drilled, dust is generated around the hole, and this dust is sucked from around the hole by the drive of the dust collector, and is sucked into the hood rubber 24, the hood 17, and the inside of the hood 17.
The dust is collected by the above-mentioned dust collector via the suction port 21 and the suction duct 25.

At this time, the opening at the tip of the hood rubber 24 is almost parallel to the bedrock 26, and no gap is formed as in the conventional case, so deterioration of the dust collection effect is prevented and the powder is allowed to flow outside. It won't leak.

When drilling a hole further above the hole drilling position shown in FIG. 2, when the piston rod of the SL cylinder 9 is sucked back, the tip opening of the hood rubber 24 is moved upward by the clockwise tilting of the guide cell 7. The gap with the rock 26 is large at the bottom, and the gap is small at the bottom, but the piston rod 11a of the SLP cylinder 11 that follows the SL cylinder 9 retreats with the piston rod suction movement of the SL cylinder 9, and the hood 17 Correct the orientation.

In other words, piston rod 1 of SLP cylinder 11
1a retreats, the hydraulic oil in the head side chamber of the cylinder 11 flows to each element 48, 47, 44, 4.
3 and 37 to the head side chamber of the hood cylinder 31, the piston rod 31a of the hood cylinder 31 is made to protrude, the hood 17 is rotated downward, and the orientation of the hood 17 is made approximately perpendicular to the rock 26. Correct the direction.

On the other hand, when drilling a hole further below the hole drilling position shown in FIG. The gap with the rock 26 is small at the top and large at the bottom, but the piston rod 11a of the SLP cylinder 11 that follows the SL cylinder 9 protrudes as the piston rod of the SL cylinder 9 moves forward, Correct the orientation of the hood 17.

In other words, piston rod 1 of SLP cylinder 11
By protruding 1a, the same SLP cylinder 11
Hydraulic oil in the rod side chamber of each element 46, 45, 4
2, 41, and 39 into the rod side chamber of the hood cylinder 31, the piston rod 31a of the hood cylinder 31 is moved backward, the hood 17 is rotated upward, and the direction of the hood 17 is approximately aligned with respect to the rock 26. Correct the direction at right angles.

In this way, by controlling the hydraulic circuit 32, the piston rod 31a of the hood cylinder 31 is controlled to reciprocate, and the direction of the hood 17 can be operated in a direction substantially perpendicular to the bedrock.

Therefore, the tip of the hood rubber 24 fixed to the tip of the hood 17 can be in contact with the rock 26 in a state substantially parallel to the rock 26, and no gap is formed between the rock 26 and the tip of the hood rubber 24. It is possible to prevent the deterioration of the dust collection effect, and in addition, since the powder does not leak out from the gap as in the conventional case, it is possible to prevent deterioration of the working environment.

In the correspondence between the structure of this invention and the above-mentioned embodiment, the first driving means of this invention corresponds to the hood cylinder 31 of the embodiment, and similarly, the control means includes the hydraulic circuit 32, the actuation mechanism 10, 1
1, the operating mechanism corresponds to both the BLP cylinder 10 and the SLP cylinder 11, and the second drive means corresponds to the hydraulic circuit 32. However, this invention is different from the above embodiment. The configuration is not limited to this, and for example, an encoder may be provided on the rotational support shaft of the boom 4 and the rotational support shaft of the guide cell 7, and a first drive means for changing the direction of the hood 17 based on an output signal from the encoder may be provided. Alternatively, the inclination of the guide cell 7 itself may be electrically detected and the first drive means for changing the direction of the hood 17 may be controlled based on the output signal thereof.

Further, in the above embodiment, the hood 17 is turned vertically as shown in FIG. 2, but the hood 17 is not limited to this, and may be turned horizontally as well.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; Fig. 1 is a side view showing the dust collector of a rock drill, Fig. 2 is an enlarged view of the main parts, and Fig. 3 is a hydraulic diagram showing the configuration of automatic control for the hood. It is a circuit diagram. 7... Guide cell, 10... BLP cylinder,
11...SLP cylinder, 12...Drifter, 13
...Drilling rod, 17...Hood, 25...Suction duct, 26...Rock, 31...Hood cylinder, 32...Hydraulic circuit.

Claims (1)

[Claims for Utility Model Registration] A hood 17 through which a drilling rod 13 can be inserted is provided at the tip of a guide cell 7 on which a drifter 12 is mounted so that it can move forward and backward, and a suction duct 25 that communicates with a dust collector is provided in the hood 17. A dust collection device for a connected rock drill, wherein the hood 17 is attached to the guide cell 7 so that the direction of the hood 17 can be changed, and a first driving means 31 for changing the direction of the hood 17 is provided, Control means is provided for controlling the first driving means 31 according to the inclination of the guide cell 17 to control the orientation of the hood 17 to be approximately perpendicular to the rock mass 26, and the control means controls the tilting of the guide cell 7. A dust collection device for a rock drill, comprising operating mechanisms 10 and 11 that are operated in accordance with the operation of the operating mechanisms 10 and 11, and a second drive means 32 that drives the first drive means 31 according to the operation of the operating mechanisms 10 and 11.