JPH0643277Y2 - Support equipment in rock drills - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a supporting device for a rock drill used for blasting work for blasting rocks and rocks, and drilling work for seri arrows when cutting out stone material.

[Prior Art] In a conventional rock drill that is attached to the tip of the boom of an excavator for excavation work, the drill body is installed so that it can move forward and backward on a horizontally elongated guide shell whose center is connected to the tip of the boom of the shovel. A drill bit is attached to the tip of a drill rod that is driven to rotate by being driven by a drill body, and the drill bit moves forward while rotating to perform a drilling operation.

[Problems to be solved by the invention] In the above rock drilling machine, there is a problem that the posture of the guide shell changes due to the reaction force of the impact action during the drilling work of the rock and the advancing angle of the drill bit changes, and when drilling the ground. When the drill body moves to the rear part on the guide shell with the guide shell going down, the weight of the drill body is concentrated on the rear part of the guide shell and the rear part of the guide shell is pressed downward. There was a problem that the support state of Ciel became unstable.

The present invention aims to solve the above problems.

[Means for Solving the Problems] The supporting device in the rock drilling machine of the present invention is adjusted by fluid pressure in the vicinity of the rear end portion of the guide shell on which the drill body of the rock drilling machine is mounted, so that it can be grounded during drilling work. And a vicinity of a rear end portion of the guide shell, a proximal end portion of an actuator tilted backward and downward in a stretched state is connected to the guide shell so as to be rotatable in a longitudinal direction.

[Operation] When drilling with a drill bit of a rock drill, an actuator whose proximal end is connected near the rear end of the guide shell and expands and contracts by fluid pressure is moved backward and downward between the guide shell and the ground. Incline it and interpose it in a projecting state, and urge the vicinity of the rear end of the guide shell forward and upward.

[Advantages of the Invention] With the configuration of the present invention as described above, the impact reaction force applied to the guide shell during drilling of rock and the ground drilling by pushing the vicinity of the rear end of the guide shell forward and upward during drilling work. Sometimes the guide shell is given a resistance force that opposes the downward force applied to the rear part of the guide shell, and the posture of the guide shell can be stabilized during drilling work. Even if the guide shell is pressed downward or pressed downward by the weight of the drill body, the guide shell can be held in a constant posture to suppress the variation of the drilling angle.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

The bracket 1 for attaching the rock drilling machine A, which is provided with a long hole in the rock D1 or the ground D2, to the tip of the boom B of the shovel S is a tip of the boom B and a piston of a hydraulic cylinder C attached to the boom B. It is connected to the link R connected to the rod C1.

In the rock drilling machine A, a guide shell 2 having an oblong cross section and a substantially upside down cross section is connected to a tip of a boom B with its central portion fixed to a bracket 1. The guide shell 2 tilts in a seesaw shape with its central portion as a fulcrum by the forward / backward movement of the piston rod C1 of the hydraulic cylinder C, and the tilt angle of the guide shell 2 is adjusted according to the drilling angle.

A drill body 3 having a hydraulic motor and a piston for striking is installed on the guide shell 2 so as to be slidable in the longitudinal direction of the guide shell 2.
A feed motor 4 driven by hydraulic pressure at the rear end
Is attached to the drill body 3, and both ends of the chain 5 mounted on the sprocket wheel fitted to the motor shaft of the feed motor 4 and the sprocket wheel pivotally supported on the front part of the guide shell 2 are attached. When the feed motor 4 is locked, the chain 5 is circulated by the forward and reverse rotations of the feed motor 4, and the drill body 3 is moved forward and backward.

A drill rod 6 is rotatably supported above the guide shell 2 by a centralizer 7 attached to the front end of the guide shell 2 and has a base end portion connected to a motor shaft of a hydraulic motor in the drill body 3 in parallel. It is installed in a shape. The drill rod 6 moves back and forth together with the drill body 3 and is rotationally driven by the hydraulic motor in the drill body 3.
Further, the drill rod 6 is hit forward by a piston built in the drill body 3. A drill bit 8 for drilling is attached to the front end of the drill rod 6.

The lower surface of the front end of the guide shell 2 is in parallel with the drill rod 6 in front of the guide shell 2 in order to contact the rock D1 or the ground D2 to be drilled near the drilling position to restrain and support the front end of the guide shell 2. The base end portion of the foot pad 9 extended to the bottom is fixed.

The rear end of the guide shell 2 is hydraulically stretched to adjust the rear end of the guide shell 2 forward and upward to stabilize the posture of the guide shell 2 during drilling work, and the entire length of the ground G is adjusted.
The base end portion of the actuator 10 which is tilted in a stretched state between the guide shell 2 and the rear end portion of the guide shell 2 is rotatably connected in the longitudinal direction of the guide shell 2.

In the actuator 10, a connecting rod 11 having a proximal end connected to a pin 17 on a projecting piece 17 formed on the lower surface of the rear end of the guide shell 2 is concentrically connected to the tip of the connecting rod 11. A cylinder 12, a first cylinder 13 having a base end portion externally fitted to the cylinder 12 and concentrically coupled thereto, and the first cylinder 13
A second cylinder 14 that is slidably inserted in the axial direction and moves back and forth in the axial direction by hydraulic pressure, and is slidably inserted in the second cylinder 14 and pressed against the ground G. As described above, the legs 15 that move back and forth in the axial direction by hydraulic pressure are connected in sequence from the front.

An angle adjusting cylinder 18 whose base end is connected to the rear part of the guide shell 2 for adjusting the tilt angle of the actuator 10.
The tip of the piston rod 18a is connected to the cylinder 12 of the actuator 10 by a pin 19.

The actuator 10 has its entire length expanded / contracted according to the height of the guide shell 2 from the ground G and the inclination angle, and the inclination angle is increased / decreased.

Next, the operation and effect of the embodiment having the above-mentioned configuration will be described.

In this example, the vicinity of the rear end of the guide shell 2 on which the drill body 3 of the rock drilling machine A is mounted is stretched and adjusted by hydraulic pressure so that it is between the ground G and the vicinity of the rear end of the guide shell 2 during drilling work. Actuator that is tilted backward and downward while it is stretched
The base ends of 10 are connected so as to be rotatable in the longitudinal direction of the guide shell.

Therefore, when drilling the rock mass D1 shown in FIGS. 1 and 3, the rear end portion of the guide shell 2 is pressed forward and upward by the actuator 10, so that when the drill bit 8 collides with the rock mass D1 A resistance force against the impact reaction force applied to the shell 2 is applied to the guide shell 2, and at the time of the drilling work of the ground D2 shown in FIG. 2, the drill body 3 is retracted with the guide shell 2 in the front descending state. Even if the weight of the drill main body 3 is concentrated on the rear part of the guide shell 2, a resistance force that opposes this pushing force is applied to the guide shell 2, and the front and rear ends of the guide shell 2 are attached to the foot pad 9.
Since it is supported in a cantilevered manner by the actuator and the actuator 10, and the foot pad 9 is pressed firmly against the rock D1, etc., the posture of the guide shell 2 is stabilized during drilling work, and fluctuations in the posture of the guide shell 2 are suppressed. can do.

Therefore, even when the guide shell 2 is pressed in the anti-excavation direction by the impact reaction force or the rear portion of the guide shell 2 is pressed downward by the weight of the drill body 3 during the drilling work, the guide shell 2 is always held in a constant posture. Then drill bit 8
This has the effect of making it possible to accurately perform the punching operation of.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a side view of a rock drill mounted on an excavator, and Figs. 2 and 3 are side views of the rock drill for explaining a drilling operation mode, respectively. is there. 2 ... Guide shell 3 ... Drill body 10 ... Actuator A ... Rock drill

Claims (1)

[Scope of utility model registration request] 1. A rear portion of a guide shell on which a drill body of a rock drill is mounted is expanded and contracted by fluid pressure so as to project between the ground and the rear portion of the guide shell during drilling work. A support device in a rock drilling machine, characterized in that a base end portion of an actuator that is tilted backward and downward in a tensioned state is connected so as to be rotatable in the longitudinal direction of the guide shell.