JPS6326238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavation control method in an earth auger machine.

As shown in FIG. 1 as an example, the earth auger machine includes an outer auger 1 consisting of a casing having a cutting edge 1a at its tip, and an inner auger 2 consisting of an auger screw inserted into the outer auger 1. The inner auger drive part 5 is movable up and down with respect to the outer auger drive part 3 by means of cylinders 4 and 4' having one end fixed on the outer auger drive part 3 connected to the root end of the outer auger 1. is supported by. Incidentally, although not shown in the drawings, a driving motor is provided in the driving sections 3 and 5.

These augers 1, 2 and drive parts 3, 5 are connected to a wire 8 whose one end is fixed to a support 6 such as a leader mast, and whose other end can be wound up by an elevating winch 7.
It is suspended via a sheave 9 so that it can be raised and lowered freely.

During excavation, both augers 1 and 2 are inserted into the ground by their own weight, but if they hit a rock layer or bedrock layer and the digging force is insufficient with their own weight alone, the third winch 1 is used to forcibly apply retraction force.
Guide wire 11 from 0 to guide sheave 12
It is connected to the lower surface of the outer auger drive section 3 via.

In the figure, 13 and 13' are guide sheaves for the wire 8, and 2a is a wire for detecting the excavation depth and excavation speed at the cutting edge 14 of the auger 2, which is wrapped around the upper and lower fixed pulleys 15 and 15'. It consists of an endless body, a part of which is used as an outer auger drive part 3, for example.
The augers 1 and 2 move together with the augers 1 and 2.

The double auger excavator configured in this way excavates by rotating both the outer auger 1 and the inner auger 2 at the same time, and the excavated soil is transported upward by the screw part of the inner auger 2 and discharged outside the machine. be done.

Moreover, when all the set augers 1 and 2 are inserted into the ground, the connection between them and the drive parts 3 and 5 is released, and only the drive parts 3 and 5 are raised by winding up the wire 8 with the lifting winch 7. Then, new augers 1' and 2' are added and further excavation is carried out.

After excavating to a desired depth, the auger 1 can be used as a steel pipe pile.

Conventionally, when using such an earth auger machine, each part was controlled manually using a simple instrument, which was extremely complicated.

The purpose of the present invention is to solve the above-mentioned disadvantages of the conventional example,
All of these controls are automated to improve work efficiency, and in particular, the wire feeding from the main winch for raising and lowering the excavator is automatically controlled in multiple stages according to the operating status of the auger to ensure efficient excavation conditions at all times. An object of the present invention is to provide a method for controlling excavation in an earth auger machine that can be held.

However, according to the present invention, the purpose of the lever is from an auger screw connected to a drive unit that is vertically suspended from a support such as a leader mast by a wire that is wound up and sent out by operating a lifting winch. In the earth auger machine, the actual current consumption signal of the drive motor of the drive section is input to the control device, the control device compares the current consumption value and the set current consumption value, and depending on the comparison result, the lifting winch is operated more frequently. This is achieved by introducing a drive signal from a control device into the drive motor control circuit of the lifting winch to control the speed in stages, and automatically controlling the wire payout operation of the winch in multiple stages.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, 16 is a drive motor for the lifting winch 7, 17 is a drive motor for the third winch 10,
18 and 19 are the drive motors 16 and 1, respectively.
7 is a motor control circuit, and 20 is a control mechanism for telescopically operating the cylinders 4, 4'.

Moreover, 21 is a load meter provided on the wire 8, and measures the load applied to the cutting edge openings 1a and 2a of both the augers 1 and 2. 22 is provided in the cylinder 4 or 4', and the distance between the outer auger 1 and the inner auger 2, more precisely the distance in the auger axial direction between the cutting edges 1a and 2a, depends on the length of the cylinders 4 and 4'. It is a distance meter that measures the distance. Reference numeral 23 is arranged in a power supply circuit to the drive motor of the outer auger drive unit 3, and is an ammeter for measuring the current consumption of the motor, and 24 is arranged in a power supply circuit to the drive motor of the inner auger drive unit 5. , an ammeter that measures the current consumption of the motor. Reference numeral 25 indicates a drawing force meter that is provided in the drawing wire 11 and measures the drawing force of the third winch 10, and 26 and 27 indicate the wire 14 or the fixed pulley 15.
Alternatively, it is an excavation depth meter and a speed meter provided at 15'. These speedometer 27 and depth meter 26 are
For example, a cam switch linked to the fixed pulley 15' may be provided, and the excavation speed may be determined by measuring the interval of output signals from the cam switch, and the excavation depth may be determined by counting the output signals. .

In the figure, 28 is a control device consisting of a programmable sequencer or a microcomputer, and this control device 28 is connected to the motor control circuits 18, 19 and the control mechanism 20, and outputs an output signal A from the control device
Similarly, the output signal B is transmitted to the motor control circuit 19, and the output signal C is transmitted to the control mechanism 20.

On the other hand, the load meter 21, distance meter 22, ammeter 2
3, 24, input signals D, E, F, G, H, I,
Entered as J.

Figure 2 shows a flowchart. First, when the automatic digging button is pressed, the drive motors of the outer auger drive section 3 and the inner auger drive section 5 are energized, and the outer auger 1 and the inner auger 2 are simultaneously moved in opposite directions. The machine rotates and excavation begins.

During excavation, the excavator sinks under its own weight, and along with this, the wire 8 is let out from the lifting winch 7 and the wire 11 is wound around the third winch 10. Note that when the stop button is pressed, the lifting winch 7 and the third winch 10 are stopped.

On the other hand, as the excavator advances, the wire 14 and the fixed pulleys 15, 15' move, and along with this movement, the excavation depth is measured by the depth gauge 26, and a depth signal I is input to the control device 28.

The control device 28 compares the set depth and the measured excavation depth, and if they match, sends signals A and B containing OFF commands to the motor control circuit 18,
As a result, the motors 16 and 17 are stopped, and the lifting winch 7 and third winch 10 are also stopped. If the excavation depth does not reach the set depth,
Signal A containing the ON command from the control device 28
is output to the motor control circuit 18, and the lifting winch 7 is set to 3rd speed (for example, 2nd speed) via the motor 16.
Pay out the wire 8 at a speed (m/min).

Here, the current consumption signals F and G from the ammeters 23 and 24 are input to the control device 28.
The actual total current consumption value of both motors added in is compared with the set current consumption value. In this case, if the actual total current consumption value is smaller than the set current value, the signal A (a ₁ ) is input from the control device 28 to the motor control circuit 18, the rotation of the motor 16 is controlled, and the lifting winch 7 is set to 3rd speed. Pay out the wire 8 at a speed of (2 m/min).

On the other hand, if the current consumption value is larger than the set current value, the signal A changes to A (a ₂ ) and A (a ₃ ) sequentially, and the lifting winch 7 is switched to 2nd speed (1 m/min) and 1st speed (0.5 m/min).
The speed at which the wire 8 is fed out (minutes) is controlled.

Furthermore, even if the lifting winch 7 continues to operate in 1st speed, if the actual total current consumption value is still large,
Both augers 1 and 2 continue to rotate without stopping the lifting winch 7 and lowering the excavator. Even with this, if the actual total current consumption value is larger, the control device 2
8 outputs a signal A containing an ON command for reverse rotation to the motor control circuit 18, and as a result, the motor 16 and the lifting winch 7 are reversely rotated, the wire 8 is wound up, and the earth auger is raised somewhat. The lifting winch stops only when the current consumption value becomes smaller than the set current value.

As described above, the excavation control method for an earth auger machine of the present invention automatically controls the lifting winch of the excavator according to the auger operating state, and this control is performed in multiple stages, so that appropriate excavation conditions can be achieved. This allows it to be maintained at all times.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart. 1... Outer auger, 1a... Blade mouth, 2... Inner auger, 2a... Blade mouth, 3... Outer auger drive section, 4, 4'... Cylinder, 5... Inner auger drive section, 6... Support body, 7... Lifting winch, 8
...Wire, 9...Moving pulley, 10...Third winch, 11...Leading wire, 12,13,
13'...Guide roller, 14...Wire,
15, 15'... Fixed pulley, 16, 17... Drive motor, 18, 19... Motor control circuit, 2
0...Control mechanism, 21...Load meter, 22...Distance meter, 23, 24...Ammeter, 25...Retraction force meter,
26... Depth gauge, 27... Speed meter, 28... Control device.

Claims (1)

[Claims] 1. An excavation control method in an earth auger machine consisting of an auger screw connected to a drive unit that is vertically suspended from a support such as a leader mast by a wire that is wound up and sent out by a lifting winch operation, , the actual current consumption signal of the drive motor of the drive section is input to the control device, the control device compares the current consumption value with the set current consumption value, and controls the speed of the lifting winch in multiple stages according to the comparison result. 1. An excavation control method for an earth auger machine, characterized in that a drive signal from a control device is introduced into a drive motor control circuit of an elevating winch, and the wire payout operation of the winch is automatically controlled in multiple stages.