JPH08326458A - Vertical guide device of earth auger - Google Patents

Abstract

PURPOSE: To make it possible to dig a vertical hole easily without any need for a guide even if a worker is unskilled about handling a boom and help reduce labor during work even for a skilled worker. CONSTITUTION: A horizontal position detection means computes the horizontal position of a pivoted member 15b suspended with an earth auger means 16, which is the tip of a boom 13 based on a derricking angle and the amount of an expansion of the boom 13 and the horizontal position of the pivoted member 15b in the starting time of hole digging work is stored at a tip position memory means. Since then, during hole digging work by the earth auger means 16, the difference between the horizontal position of the pivoted member 15b at the starting time of hole digging work and the horizontal position of the pivoted member at the present time is computed with a computation means. The expansion direction of the boom 13 required to eliminate the difference computed with this computation means is displayed on a display means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical guide device for a digging machine, which is provided with ground auger means at the tip of a boom.

[0002]

2. Description of the Related Art An excavator equipped with an earth auger means at the tip of a boom is used as a excavator column 10 as shown in FIG.
It has been known. The digging column vehicle 10 is for digging a columnar object such as a utility pole on the ground when the columnar object is built on the ground.
A boom 13 which can be freely operated such as undulation and expansion and contraction is attached to 2, and an earth auger means 16 is vertically suspended from the tip of the boom 13.

When the digging work is carried out by the digging construction column wheel 10 as described above, the earth auger means 16 is provided as the digging progresses.
Need to be lowered. Here, earth auger means 1
6 is lowered by performing the fall operation of the boom 13, but if the fall operation of the boom 13 is simply performed,
The position of the pivotal support portion (position of the tip of the boom) 15b of the earth auger means 16 moves forward.

That is, as shown in FIG. 3, the horizontal position of the pivot 15b at the start of digging moves forward by L1 (from the swivel 12, the boom 13, and the pivot 12a to the pivot 1).
Since the horizontal distance L up to 5b extends by L1), when the digging work is performed as it is, the earth auger means 16 falls backward by the angle θ (to the right in the drawing) and the dug hole is not vertical.

Therefore, in order to dig a hole perpendicular to the ground as shown in FIG. 2, the boom 13 is tilted and the boom 13 is also contracted, so that the pivot support at the start of digging. It is necessary to control the operation of the boom so that the horizontal position of 15b (horizontal distance L from the pivot 12a to the pivot 15b) does not change.

[0006]

However, the operation control of the boom 13 is performed by the operation device 1 mounted on the swivel base 12.
It is difficult to grasp the subtle inclination of the earth auger means 16 (especially the inclination in the same direction as the boom 13 up and down direction) from the position where the operating device 19 is operated. Therefore, when performing a digging operation, another worker (guide) is arranged near the earth auger means in order to convey the inclination angle of the earth auger means 16 to the operator who operates the operating device 19. There was a problem of need.

Further, even an operator skilled in boom operation can adjust the boom 1 according to the digging speed as supported by the guider.
It is not easy to operate the operating device which simultaneously and smoothly performs the falling operation and the contracting operation of 3
There is also a problem that it is difficult for an inexperienced worker to perform the operation of digging a vertical hole.

The present invention has been made in view of such a problem, and a worker who is unskilled in boom operation can easily dig a vertical hole without requiring a guider. An object of the present invention is to provide a vertical guide device for a digging machine, which enables even a skilled worker to reduce the labor during work.

[0009]

In order to achieve the above-mentioned object, in the vertical guiding apparatus for a digging machine of the present invention, at least a boom mounted on a base is capable of undulating and extending / contracting. The earth auger means is suspended at the tip, and the boom is raised and lowered and the telescopic operation is performed at the same time, so that the earth auger means can be vertically moved up and down to dig a vertical hole in the ground. Are configured. Then, the horizontal position calculating means calculates the horizontal position of the tip portion of the boom based on the hoisting angle of the boom and the amount of expansion and contraction, and the horizontal position of the tip portion of the boom at the start of the digging operation is stored in the tip position storage means. . After that, when digging with the earth auger means, the difference between the horizontal position of the boom tip at the start of the work and the current horizontal position of the boom tip is calculated by the calculation means, and this calculation means is used. The expansion / contraction direction of the boom required to eliminate the calculated difference is displayed on the display means.

According to the vertical guiding device of the digging machine configured as described above, when performing the hoisting operation of the boom during the digging work, the boom is extended and retracted in the direction displayed by the display device. I'll do it. For this reason, it is possible to easily dig a hole vertical to the ground without requiring a guider and even when the operator who operates the boom is unskilled.

In order to eliminate the difference in the horizontal position of the boom tip portion calculated by the calculation means, the boom correction operation means may perform the boom extension / contraction operation in the required direction. According to the vertical guiding device of the digging machine configured as described above, the worker only has to perform the hoisting operation of the boom, and thus it is possible to more easily dig a hole vertical to the ground.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. First, with reference to FIG. 1, a detailed configuration of a digging column working vehicle 10 including a vertical guiding device for a digging machine according to the present invention will be described. It should be noted that FIG. 1 is a view of the excavation building work vehicle 10 as seen from the rear of the vehicle. On a vehicle body (base) 11 of the excavation / construction pillar work vehicle 10, a swivel base 12 that is capable of horizontally swiveling with respect to the vehicle body 11 is attached. Further, a boom 13 in which a tip boom 13a is telescopically telescopically expandable with respect to a base boom 13b is attached to an upper part of the swivel base 12 so as to be vertically movable.

The expansion and contraction operation of the boom 13 is performed by the expansion and contraction operation of an expansion and contraction cylinder (not shown) arranged in the boom 13, and the up and down operation of the boom 13 is performed by the base end boom 13b.
This is performed by the expansion and contraction operation of the undulating cylinder 14 arranged between the swivel base 12 and the swivel base 12.

An auger bracket 15 is mounted on the tip boom 13a so as to be slidable in the longitudinal direction of the tip boom 13a. This auger bracket 1
A rod member 15a is attached to the lower part of the rod 5, and an earth auger means 16 is attached to the tip of the rod member 15a below the boom 13 so as to be swingable in its longitudinal direction.

The earth auger means 16 comprises an auger screw 16a and a hydraulic motor 16b for rotationally driving the auger screw 16a. The earth auger means 16 rotates the auger screw 16a vertically suspended from the tip of the boom 13. By doing so, it is possible to dig a hole in the ground.

When a digging work is performed using the digging column 10 as described above, the boom 1 is stopped near the digging position.
3, the earth auger means 16 in the retracted state is swung to the working position, and then the boom 13 is laid down.
By extending and rotating, the earth auger means 16 is moved above the hole excavation position.

Then, the auger screw 16a attached to the lower portion of the earth auger means 16 is rotated and the boom 13 is tilted to dig the ground G, and after the digging is finished, the boom 13 is raised. While operating, the auger screw 16a is pulled out from the hole by reversing the earth auger means 16, and the earth auger means 16 is pulled up so as to be substantially parallel to the boom 13, and the auger provided on the side surface of the base end boom 13b. The receiver 17 receives and stores it.

The swivel operation of the swivel base 12, the hoisting operation and the telescopic operation of the boom 13, and the auger screw 1 as described above.
The operation control of the rotation of 6a is performed according to the operation of the operation device 19 provided on the swivel base 12. In principle, each of these operations can be performed independently by operating the operating device 19, but in order to ensure safety during work and to easily dig a vertical hole, this hole digging column The work vehicle 10 is provided with the following safety device and vertical guidance device.

First, the safety device will be described with reference to FIG. This safety device is a so-called moment limiter, and its operation is controlled by various detectors and actuating means provided in the moment limiter unit 40 arranged in the vehicle body 11.

In the digging / construction column vehicle 10 constructed as described above, since the earth auger means 16 suspended from the tip of the boom 13 has a predetermined weight, the boom 13 is operated. And a moment in the direction of overturning the vehicle body 11 (hereinafter referred to as “overturning moment”) act, and the overturning moment becomes large depending on the extension amount of the boom 13 and the undulation angle, which makes the vehicle body 11 unstable. For this reason, outrigger jack devices 18 are provided on the front, rear, left and right sides of the vehicle body 11 of the digging / construction column vehicle 10 to stably instruct the vehicle body 11 against the overturning moment.

Here, the overturning moment becomes larger as the extension amount of the boom 13 becomes longer, becomes larger as the undulation angle becomes smaller (shallow), and the weight of the tip portion of the boom 13 (weight of the earth auger means 16) becomes heavier. The bigger it gets. Further, the larger the amount of extension (jack tension) of the outrigger beam 18a in the outrigger jack 18 with respect to the vehicle body 11, the more stable the vehicle body 11 can be supported against a large overturning moment.

Therefore, the moment limiter unit 40
In the above, the hoisting angle detecting means 41 for detecting the hoisting angle of the boom 13, the telescopic amount detecting means 42 for detecting the telescopic amount of the boom 13, the load detecting means 43 for detecting the load acting on the boom 13, and the swivel base. By providing the turning angle detecting means 44 for detecting the turning angle of 12, the overturning moment (actual moment) acting on the vehicle body 11 is calculated. Further, by providing the jack tension width detecting means 45 for detecting the tension width of the outrigger jack 18, the moment (allowable moment) capable of stably supporting the vehicle body 11 is also calculated.

When the operation control of each boom 13 is performed so that the actual moment exceeds the allowable moment, an alarm is activated by the alarm device 46 or the boom operation restricting means 47 operates the boom 13 by the operating device 19. Regardless of the control, the operation of the boom 13 in the direction in which the overturning moment increases becomes restricted.

Next, the vertical guiding device will be described with reference to FIGS. 5 and 6. The vertical guidance device is composed of a vertical moat guidance unit 30 and a display unit 20, and when performing the digging work by the earth auger means 16, the boom 13 is performed along with the hoisting operation of the boom 13 so as to dig a vertical hole. The necessity and the direction of the expansion / contraction operation are displayed to the operator.

Here, in order to keep the earth auger means 16 vertical at all times, control may be performed so as to keep the horizontal position of the pivotal support position 15b of the earth auger means 16 constant at the start of the digging work. For example, when the horizontal position is obtained with the pivot position 12a of the boom 13 as a reference, if the horizontal distance from the pivot position 12a to the pivot position 15b is L, this horizontal distance L is kept constant during the digging work. You can do it like this.

Therefore, in the vertical digging guide unit 30, the horizontal distance L is kept constant by performing the control shown in the flowchart of FIG.
When performing a digging operation, the tip portion 16c of the earth auger means 16 suspended vertically from the tip portion of the boom 13
Is brought into contact with the digging position on the ground G for positioning. In this state, the vertical induction switch 22 provided on the display unit 20 is turned on.

If it is detected in step S1 in the flowchart that the vertical induction switch 22 has been turned on, the process proceeds to step S2 and the horizontal distance when the vertical induction switch 22 is turned on is detected. L is stored in the storage means (not shown) provided in the vertical digging guidance unit 30. The horizontal distance L is
Calculated by horizontal position calculating means (not shown) also provided in the guiding unit 30 based on the detected value of the undulation angle detecting means 41 and the detected value of the expansion / contraction amount detecting means 42 provided in the moment limiter unit 40. To be done.

When a digging operation is performed by operating the operating device 19, the boom 13 must be laid down to deepen the hole. Since a deviation occurs between the horizontal distance (current horizontal distance) when digging and the stored horizontal distance (memorized horizontal distance) L, the stored horizontal distance L is compared with the current horizontal distance in step S3. To do. As a result of this comparison, when it is determined that the current horizontal distance is longer than the stored horizontal distance L (L has become longer), the process proceeds to step S4 and the display lamp 21 of the display lamp 20 provided on the display unit 20 is operated. The "ON" lamp 21b blinks.

As a result, the operator performs the fall operation of the boom 13 and, according to the blinking of the lamp, carries out the operation (reduction operation) of the boom 13 until the stored horizontal distance L is reached, whereby the earth auger means 16 becomes vertical. Return to. If the current horizontal distance matches the stored horizontal distance L,
Since the comparison results in step S3 are the same and the process does not proceed to step S4 and the "ON" lamp 21b is extinguished, the operator may perform the reduction operation of the boom 13 until the "ON" lamp 21b is extinguished.

Here, if the operator performs the input operation too much, the process proceeds to step S5, and the "exit" lamp 21a blinks. Therefore, the operation for ejecting the boom 13 according to the instruction of the lamp 21a ( It is sufficient to perform the extension operation), and the earth auger means 16 can be used even if the operator is not skilled in boom operation.
The vertical can be easily maintained.

In the above embodiment, the boom operation for advancing a hole has been described. However, when the earth auger means 16 is pulled out from the ground G by excavating a hole to a desired depth, the boom operation is different from the above. On the contrary, while raising and lowering the boom 13, the boom 1 follows the indication of the indicator lamp 21.
The output operation (extension operation) of 3 will be performed.

According to the vertical guide device of the digging machine constructed as described above, the extension / contraction operation direction of the boom 13 with respect to the operator can be maintained with a simple structure so that the earth auger means 16 can always be maintained vertically. Can be displayed.
For this reason, it is possible to easily dig a vertical hole even if the operator is unfamiliar with the boom operation without requiring a guider, and it is possible to reduce the work effort even for a skilled operator. it can.

Further, in the digging construction column vehicle 10 provided with the moment limiter unit 40 as described above,
Since the detection values of the hoisting angle detection means 41 of the boom 13 and the expansion / contraction amount detection means 42 of the boom 13 can be used,
It is only necessary to add the vertical digging guiding unit 30 and the display unit 20, and the vertical guiding device can be obtained with a simpler configuration. As a result, the vertical guiding device can be provided at low cost even when a new vehicle is manufactured, and the existing vertical excavation column vehicle can be easily and inexpensively provided with the vertical guiding device.

Next, the other vertical guiding device of the present invention will be described with reference to FIG. This vertical guidance device is configured by providing boom correction operation means 50 instead of the display unit 20 in the vertical guidance device.
Since the configuration of the moment limiter unit 40 in the vertical guiding device shown in FIG. 7 is the same as that of the moment limiter unit 40 shown in FIG. 4, the same reference numerals are given and detailed description of the contents is omitted.

The boom correction actuating means 50 causes the boom 13 to expand and contract when the boom 13 is raised and lowered based on a control signal from the vertical excavation guidance unit 30. In the extension / contraction operation of the boom 13, in the vertical digging guidance unit 30, instead of transmitting the signal for blinking the “ON” lamp 21b in step S4 of the flowchart shown in FIG.
This is done by transmitting an extension operation signal for the boom 13 instead of transmitting the signal for blinking the "out" lamp 21a in step S5.

That is, when it is detected in step S1 that the vertical induction switch 22 is turned on, the process proceeds to step S2 and the horizontal distance L at this time is detected.
Is stored in the storage means, and the stored horizontal distance L is compared with the current horizontal distance in step S3. As a result of this comparison,
When it is determined that the current horizontal distance is longer than the stored horizontal distance L, the process proceeds to step S4, and a reduction operation signal is transmitted to the boom correction operation means 50. The boom correction actuating means 50 that has received the contraction actuating signal causes the earth auger means 16 to perform the contracting operation of the boom 13 until the comparison result becomes equal in step S3, regardless of whether the operation device 19 expands or contracts. Keep vertical.

When the earth auger means 16 is pulled out of the ground G after the digging work, if the boom 13 is raised, the current horizontal distance becomes shorter than the stored horizontal distance L. Therefore, from step S3. In step S5, the extension operation signal is transmitted to the boom correction operation means 50. The boom correction actuating means 50 that has received the extension operation signal causes the boom 13 to extend and keeps the earth auger means 16 vertical regardless of whether the operation device 19 is extended or retracted. As a result, when digging a vertical hole,
Since the operator only has to perform the hoisting operation of the boom 13,
It is possible to further reduce the labor of the worker during the digging work.

In each of the above embodiments, the horizontal position of the pivotal position 15b at the start of the digging work is stored in the storage means when the vertical induction switch 22 is turned on. Is not limited to this, and when the rotational drive of the hydraulic motor 16b in the earth auger means 16 is performed, the drive detection means detects that this rotational drive has been performed, and the pivot position based on this detection signal. The horizontal position of 15b may be stored.

In each of the above embodiments, the undulation angle detecting means 41 and the expansion / contraction amount detecting means 42 provided in the moment limiter unit 40 are used as the undulation angle detecting means and the expansion / contraction amount detecting means. The present invention is not limited to this, and in a digging / construction column vehicle without a moment limiter, if the undulation angle detection means and the expansion / contraction amount detection means are provided together with the vertical digging guidance unit 30 and the display unit 20. Good.

[0040]

As described above, the vertical guiding device of the digging machine according to the present invention, when the digging work is performed by the earth auger means, the horizontal position of the tip of the boom at the start of the work and the current boom position. The difference from the horizontal position of the tip portion is calculated by the calculating means, and the expansion / contraction direction of the boom necessary for eliminating the difference calculated by the calculating means is displayed on the display means. Then, since the operator only needs to expand and contract the boom in the direction displayed on the display device when performing the hoisting operation of the boom, the horizontal position of the boom tip can be maintained at the same position.

As a result, even a worker unskilled in boom operation can easily dig a hole perpendicular to the ground, and even a skilled worker can reduce the work effort. . Further, since a guider in the vicinity of the earth auger means is unnecessary, labor saving of work can be achieved. Furthermore, since it has a simple structure, it can be manufactured at low cost.

Further, in order to eliminate the difference calculated by the calculating means, the boom correcting operation means may be arranged to perform the boom expanding / contracting operation in conjunction with the boom hoisting operation. According to the vertical guide device of the digging machine, it is possible to dig a vertical hole more easily.

[Brief description of drawings]

FIG. 1 is a rear view of a digging column vehicle equipped with a vertical guiding device for a digging machine according to the present invention.

FIG. 2 is a rear view showing the state of the above-mentioned digging column car during digging.

FIG. 3 is a rear view showing a state at the time of digging when the earth auger means of the digging column truck is inclined.

FIG. 4 is a block diagram of a vertical guide device of the hole excavator.

FIG. 5 is a flowchart showing control in a vertical digging guidance unit.

FIG. 6 is a front view of a display unit in the vertical guiding device of the hole digging machine.

FIG. 7 is a block diagram of a vertical guiding device of a digging machine according to another embodiment.

[Explanation of symbols]

 10 Hole excavator column 12 Swiveling base 13 Boom 14 Elevating cylinder 15 Auger bracket 16 Earth auger means 19 Operating device

Claims (2)

[Claims] 1. A boom, which is mounted on a base so that it can be undulated and expanded and contracted freely, and an earth auger means which is hung at the tip of this boom so that it can swing at least in the same direction as the boom. And a vertical guiding device of a digging machine for vertically moving the earth auger means to vertically dig a hole in the ground by performing an up-and-down motion and a telescopic motion of the boom. Horizontal position calculating means for calculating the horizontal position of the tip portion of the boom based on the undulation angle and the amount of expansion and contraction, and a tip portion for storing the horizontal position of the tip portion of the boom at the start of the digging work by the earth auger means. Position storage means, and during the digging work by the earth auger means, the horizontal position of the tip of the boom at the start of the digging work and the current horizontal position of the tip of the boom. And a display unit for displaying the expansion / contraction direction of the boom necessary to eliminate the difference calculated by the calculation unit. . 2. A boom mounted at least on a base so as to be capable of undulating and extending / contracting freely, and an earth auger means hung at a tip end portion of the boom for swinging at least in the same direction as the undulating direction of the boom. And a vertical guiding device of a digging machine for vertically moving the earth auger means to vertically dig a hole in the ground by performing an up-and-down motion and a telescopic motion of the boom. Horizontal position calculating means for calculating the horizontal position of the tip portion of the boom based on the undulation angle and the amount of expansion and contraction, and a tip portion for storing the horizontal position of the tip portion of the boom at the start of the digging work by the earth auger means. Position storage means, and during the digging work by the earth auger means, the horizontal position of the tip of the boom at the start of the digging work and the current horizontal position of the tip of the boom. And a boom correction operating means for performing a telescopic operation of the boom necessary to eliminate the difference calculated by the calculating means. .