JPS6338517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a self-propelled auger device in which a hole drilling machine is attached to a self-propelled vehicle body, and is widely used in the field of civil engineering work.

<Prior Art> Conventionally, a self-propelled auger device includes a self-propelled vehicle body having a rotating section on the upper part, a self-propelled vehicle body that is pivoted to the rotating section so as to be able to rise and fall, and is lifted and raised by a first hydraulic cylinder device. a boom, an arm that is pivotably supported on the tip of the boom so that it can be lifted up and down and lifted up and down by a second hydraulic cylinder device, and a third hydraulic cylinder device that is assembled in a parallel cross shape with the tip of the arm as one link. A self-propelled auger device is known (Utility Model Application No. 55-24377), which includes a link mechanism that is moved by a link mechanism, and a hole drill fixed to a link on the distal end side of an arm in the link mechanism.

<Problems to be Solved by the Invention> By the way, in order to efficiently drill holes even in hard ground, when drilling a hole while forcing the drill downward, it is necessary to keep the drill machine always positioned on the same vertical line. , the boom and arm must be tilted downward.

However, when doing this with conventional equipment,
While maintaining the vertical position of the drilling machine by adjusting the third hydraulic cylinder device and maintaining the horizontal position of the drilling machine by adjusting the first and second hydraulic cylinder devices, the boom and arm are moved downward. A tilting motion must be performed. That is, since the movements of the boom, arm, and link mechanism must be controlled simultaneously, there is a problem that the operation is difficult and requires skill.

In addition, since the drilling machine is held by two-point support from the side, it is easy to force the drilling machine to move up and down on a vertical line, and it is difficult to control the vertical direction of the upper end support of the drilling machine. The strain may cause lateral bending stress on the screw portion, leading to damage.

<Means and effects for solving the problems> The means for solving the above problems are as follows:
To explain with reference to FIG. 1 which is an embodiment, the present invention provides a first
a boom 4 that is pivoted so as to be lifted up and down by a hydraulic cylinder device 3; and an arm 6 that is lifted up and down by a second hydraulic cylinder device 5 at the tip of the boom 4.
and a bracket 8 that is shorter than the arm 6 and is pivotally supported at the tip of the arm 6 and lifted up and down by a third hydraulic cylinder device 7. The hole drilling machine 9 is hung swingably on a single point pivot, and the movable arm mechanism is driven by each cylinder device to maintain the pivot position of the drilling machine 9 at the same plane position when viewed from a plane position. The drilling machine is forced to move along a vertical line.

<Function> In the present invention, the hole drilling machine 9 is pivotably suspended downward from the bracket 8 at one point, so that it naturally maintains a vertical posture unless an external force is applied to tilt it. Therefore, in the present invention, when drilling a hole while urging the drilling machine 9 downward,
No operation is required to maintain the vertical state of the drilling machine 9.

In the present invention, the third hydraulic cylinder device 7 for raising the bracket 8 is not for maintaining the vertical state of the drilling machine 9, but as described below.
This is used to position the hole drilling machine 9 in the same plane position.

First, by operating the first hydraulic cylinder device 3, the boom 4 is tilted downward and drilling is performed while urging the drilling machine 9 downward.As the drilling progresses, the boom 4 is lowered. As the distance decreases, the plane position of the hole drilling machine 9 shifts. However, in reality, the tip of the drilling machine 9 is restrained within the drilled hole, so the above-mentioned movement does not occur.
Unreasonable force will be applied to the hole drilling machine 9.

The external force applied to the drilling machine 9 causes the arm 6 to tilt due to the operation of the second hydraulic cylinder device 5.
This can be absorbed by shortening the linear length of the arm 6 from the boom 4. but,
Since the boom 4 and arm 6 are relatively long,
Even with a relatively small amount of tilting, the amount of movement of the planar position of the hole drilling machine 9 is large, making it difficult to make adjustments.

Therefore, in the present invention, the third hydraulic cylinder device 7
Since this bracket 8 is shorter than the arm 6, the amount of plane position movement of the hole drilling machine 9 relative to its tilting amount is relatively small, and the amount of movement applied to the hole drilling machine 9 is relatively small. It is easy to make adjustments to absorb external forces.

Also, when the tilting limit of the bracket 8 is near, the boom 4 is activated by the first hydraulic cylinder device 3.
Stop the tilting of the arm 6 and the bracket 8, return the bracket 8 to its original position, tilt the arm 6, replace the amount of displacement that was previously absorbed by the bracket 8 with that absorbed by the arm 6, and then return the bracket 8 to its original position. Just repeat the same auger operation.

As described above, in the present invention, only by controlling the movement of any two of the boom 4, the arm 6, or the bracket 8, the biasing work and the planar position adjustment work for the drilling machine 9 can be performed.

<Example> FIG. 1 is a side view of a self-propelled auger device according to an example of the present invention.

In FIG. 1, reference numeral 2 denotes a self-propelled vehicle body, on the top of which a swing section 1 equipped with an engine 10, a driver's cab 11, etc. is rotatably mounted. Furthermore, a pair of left and right endless tracks 12 is provided as a traveling means.

A boom 4 is attached to the revolving part 1 with a pin 13 so as to be able to be lifted up and down, and an arm 6 is attached to the tip of the boom 4 with a pin 14 so that it can be lifted up and down.

The boom 4 can be raised and raised by first hydraulic cylinder devices 3 arranged on the left and right sides. In the figure, 15,
Reference numeral 16 designates a pin for pivotally connecting the first hydraulic cylinder device 3 to the swing section 1 and the boom 4, and 3a represents a rod that moves in and out by hydraulic pressure. Further, 5 is a second hydraulic cylinder device for raising and lowering the arm 6,
One end thereof is pivotally connected to the middle of the boom 4 by a pin 17, and the rod 5 of the second hydraulic cylinder device 5 is connected to the boom 4 by a pin 17.
a is pivotally connected to the rear end of the arm 6 by a pin 18.

A bracket 8, which is sufficiently short compared to the arm 6, is pivotally attached to the tip of the arm 6 by a pin 19, and a hole drilling machine 9 is attached to the tip of the bracket 8 by a pin 20.
It hangs freely swinging on a single point pivot. In the figure,
9a is a rotating device of the hole drilling machine, and 9b is a screw.

A link 21a is pivotally supported in the middle of the arm 6 by a pin 22, and the tip of a rod 7a of a third hydraulic cylinder device 7 is pivotally supported at the tip of the link 21 by a pin 23. The other end (cylinder end) of the third hydraulic cylinder device 7 was pivotally supported to the arm 6 by a pin 24. Furthermore, a link 21b is attached to the tip of the rod 7a by a pin 23 along with a link 21a.
One end of the link 21b is pivotally supported, and the other end of the link 21b is pivotally supported at the end of the bracket 8 by a pin 25, and by these link mechanisms, the third hydraulic cylinder device 7
The aim was to raise and lower the bracket 8 smoothly.

When performing drilling work, the obtained device drives the rotating device 9a after the tip of the screw 9b, which is vertically suspended from the bracket 8 by a single-point pivot, is thrust into a predetermined position on the ground. While rotating the screw 9b, a downward force was applied to the upper pivot point.

When the tip of the screw 9b penetrates approximately 20 cm into the ground, the tip of the screw 9b is completely guided into the ground, and from then on, the screw is guided by appropriately adjusting the movable arm mechanism consisting of the boom, arm, and bracket. 9b was able to achieve drilling on a vertical line.

Since the drilling machine is pivotally supported at one point by the pin 20, even when the boom, arm, and bracket are moved to adjust the position of the drilling machine by each hydraulic cylinder during drilling of the screw 9b, the shaft fulcrum remains unchanged. A small amount of distortion on the plane can be absorbed without difficulty, and the phenomenon of screw breakage that occurs with two-point supported drilling machines, that is, the phenomenon of screw breakage due to twisting at two points, has been completely eliminated. .

While the drilling machine 9 is in operation, there is no restriction on the angular relationship of the bracket 8 with respect to the shaft fulcrum of the drilling machine, and the shaft fulcrum 2
Since adjustment control of only the plane positional relationship of 0 is sufficient, it becomes easy to control each member of the boom 4, arm 6, and bracket 8, and the driving force of the movable arm mechanism consisting of these members is effective as a force pushing down the screw 9b. This makes it possible to apply an extremely large vertically downward force to the screw 9b, making it possible to dramatically improve the drilling machine.

Furthermore, by erecting the bracket 8, the hanging position of the drilling machine could be raised, and although it was a small machine, it exhibited the same hanging function as a large machine.

The rotary device 9a of the hole drilling machine 9 can be of various types, such as hydraulic, electric, pneumatic, or hydraulic.

<Effects of the Invention> As explained above, according to the present invention, even an unskilled person can perform drilling work efficiently through relatively simple operations.

Since the drilling machine is a one-point pivot support, the vertical position of the screw can be naturally achieved at the start of drilling, and the movable arm mechanism maintains the plane position as the drilling machine descends. The screw will not break due to strain force caused by swinging for position adjustment.

In addition, even when the bracket is inverted, the drilling machine can be hung vertically, and the drilling machine can be lifted high, making it possible to hang a long drilling machine high even though it is a small machine that can enter and exit narrow spaces. .

[Brief explanation of the drawing]

FIG. 1 is a side view of a traveling auger device according to an embodiment of the present invention. 1: Swinging part, 2: Self-propelled vehicle body, 3: First hydraulic cylinder device, 4: Boom, 5: Second hydraulic cylinder device, 6: Arm, 7: Third hydraulic cylinder device, 8: Bracket, 9...Drilling machine.

Claims (1)

[Claims] 1 A boom 4 that is lifted up and down by a first hydraulic cylinder device 3, and an arm 6 that is pivotally supported at the tip of the boom 4 and that is lifted up and down by a second hydraulic cylinder device 5.
and a bracket 8 which is shorter than the arm 6 and which is pivotally supported at the tip of the arm 6 and is lifted up and down by a third hydraulic cylinder device 7. The movable arm mechanism is rotatable with respect to the self-propelled vehicle body and can be lifted up and down with respect to the self-propelled vehicle body. A self-propelled auger device in which a drilling machine 9 is swingably suspended from a bracket 8 of a movable arm mechanism on a single point pivot.