JPS6011194Y2 - Drilling record monitoring device - Google Patents

Description

[Detailed description of the invention] This invention relates to a drilling record monitoring device for an excavator, and in particular, a drilling record monitoring device for recording and displaying changes in excavation depth over time in direct excavation and the angle of the bottom hole wall in bottom drilling. Regarding.

Conventionally, in order to measure the depth of an excavated hole, an artificial method was used in which a weight was attached to the tip of a string-like scale with dimensions carved into it, and the scale was lowered into the excavated hole.

In addition, measuring the excavation time required the work supervisor to use a stopwatch to measure and record the excavation time and excavation preparation time, and calculate the total of the excavation time to calculate the excavation time.

On the other hand, recording and monitoring of the hole wall angle in the vertical direction of the hole during bottom expansion drilling requires recording and monitoring of the angle of the bottom hole wall, since there are few examples of technically perfected drilling machines that perform such bottom expansion drilling. Almost no technical means have been established.

The purpose of this invention is to record depth gauge information that measures the excavation depth of the excavator over time by applying it to an X-Y recorder, and to calculate the bottom expansion diameter from the depth gauge information and the displacement of the bottom expansion bit operating mechanism of the excavator. The present invention provides an excavation record monitoring device that can record the angle of the wall of a bottom-expanded hole with respect to the vertical direction of the hole during bottom-expanding excavation by applying these values to an X-Y recorder.

Therefore, according to this invention, a depth meter that provides a depth signal of the excavator, a converter that extracts the bottom expansion diameter from the detected displacement of the operating mechanism of the bottom expansion bit, and a depth signal that inputs the depth signal from the depth meter and converts the depth along the time axis. The excavation state of the excavator is automatically controlled by an X-Y recorder that records the depth of excavation using the machine, and inputs this depth signal and the post-expansion signal from the converter to record the angle of the wall of the enlarged hole. The present invention provides an excavation record monitoring device that displays and records information.

Preferred embodiments of this invention will be described below based on the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the overall configuration of this invention. The excavator main body 1 has a main bit 2 for direct digging at the tip, and a bottom expanding bit 3 is provided following the main bit 2. It will be done.

The excavator main body 1 is suspended from the ground by a steel cable, and the excavation depth is measured by a depth gauge 4 provided on the ground side.

The depth gauge 4 is equipped with a tape reel 5, and the stainless steel tape 6 that is fed out from the tape reel 5 has small holes drilled at regular intervals. Sent out.

The depth meter 4 has a built-in means for measuring the amount of tape 6 to be sent out, for example, a means for optically detecting a small hole in the tape 6, which is converted into an electrical pulse signal by a pulse converter 7 and sent out. do.

The digital/analog converter 8 converts the pulse signal giving depth information into an analog signal.

On the other hand, the bottom-expanding bit 3 of the excavator is connected to the cylinder rod 16 of the hydraulic cylinder 13 through a link mechanism 14, and when the cylinder rod 16 rises, the bottom-expanding bit 13 opens outward to perform bottom-clearing excavation.

The amount of displacement of the cylinder rod 16 is detected by the position detector 12.

This displacement signal from the position detector 12 is given to a converter 15 and converted into a signal representing the bottom diameter.

The calculation for determining the enlarged bottom diameter from the displacement amount of the position detector 12 can be performed using the same sine converter and amplifier as shown in the utility model registration application (2) filed simultaneously by the same applicant.

Signals from the digital/analog converter 8 and the converter 15 are applied to the XY recorder 9.

The switch circuit 10 operates the X-Y recorder in response to signals indicating the start and end of excavation work, and is closed during direct excavation work to send a time sweep signal to one input of the X-Y recorder. Activate the drive device of the time axis adapter to draw the time-dependent change of the depth signal provided as the other sweep signal on the time axis.

The switch circuit 11 receives the signal to start the bottom enlarging work, and switches the X-Y recorder 9 to record the angle of the bottom enlarged hole wall.

That is, when the switch circuit 11 is closed, the time signal from the switch circuit 10 is switched to a signal from the converter 15 representing the enlarged bottom diameter.

FIG. 2 is an explanatory diagram showing an example of a record chart of an X-Y recorder obtained by the excavation record monitoring device of this invention shown in FIG.

The curve 18 represents the change in depth over time during direct excavation, and the straight line 20 represents the excavation of the bottom hole wall during the bottom expansion excavation machine.

Therefore, the operation of the apparatus shown in FIG. 1 for obtaining the recording results shown in FIG. 2 will be explained.

As the excavator 1 starts excavating and descends into the ground, the stainless steel tape 6 is pulled out from the tape reel 5 of the depth gauge 4.

The amount of feed of the stainless steel tape 6 is converted into an electric pulse signal by a pulse converter 7 in the depth meter, converted into an analog signal by a digital/analog converter 8, and applied as a Y-axis insertion/extraction input signal to an X-Y recorder. Ru.

On the other hand, when the excavation work starts, the switch circuit 10 is closed, and the drive device of the built-in time axis adapter is turned on so that the change in excavation depth over time can be drawn, and the time sweep signal is applied as the X-axis sweep signal. do.

Therefore, the time required for direct digging is curve 18 in Figure 2.
The time when excavation was stopped and other work was performed is expressed as the horizontal portion of the curve 18, and recording and monitoring can be performed throughout the entire direct excavation.
Moreover, it can be collected as work data.

Subsequently, once the direct excavation reaches the planned excavation depth,
Bottom-expanding excavation is performed to clear the bottom of the excavated hole into a conical shape.

An example of the bottom created by this widening excavation is shown in Figure 3.

Figure 3 shows that the maximum diameter of the bottom excavation is 2 for the direct excavation hole diameter D□.
This shows an example in which the value is doubled to D2, and this is done using the expanded bottom bit 3 shown in FIG.

That is, while the main bit 2 for direct digging is rotated to continue digging, the cylinder rod 16 is gradually pulled up by the hydraulic cylinder 13, and the bottom-expanding bit 3 is opened outward, thereby performing conical bottom-expanding excavation.

For automatic control of the bottom-expanding excavation itself, it is desirable to use the control device disclosed in the utility model registration application (2) filed simultaneously by the same applicant.

The monitoring factors that are important in this bottom-expanding excavation are as shown in Figure 3.
This is the angle θ of the enlarged hole wall with respect to the vertical direction.

This angle θ is set within the range of 0 to 60° in consideration of collapse of the hole wall during bottom-expanding excavation.

Therefore, in response to the start signal for bottom-expanding excavation, the switch circuit 11 in FIG.
Switch to the expanded bottom diameter signal from the converter 15.

The converter 15 is a position detector 12 that detects the amount of displacement of the cylinder rod 16 pulled up by the hydraulic cylinder 13.
Since the diameter of the bottom expansion bit is calculated based on the signal, as shown in Figure 2, a straight line 20 determined by the diameter of the bottom expansion bit as the X-axis sweep signal is drawn with respect to the excavation depth given as the Y-axis sweep signal. be able to.

The trajectory determined by the position coordinates of this exploration signal and the bottom diameter signal,
That is, the straight line 20 records the wall surface of the enlarged hole as it is.

Therefore, by drawing the straight line of the angle θ of the bottom expansion hole wall on chart paper in advance and also writing down the safety range for the planned line, the line drawn during bottom expansion excavation can be easily adjusted.
It is possible to easily monitor and determine whether the angle θ is along the reference line or not.

In addition, even without using an automatic control device to operate the bottoming bit 3 of the excavator, the pen tip of the X-Y recorder 9 of this invention can move along the reference line of the angle θ drawn in advance on the chart paper. By controlling the direct excavation speed and the feeding speed of the bottom expansion bit 3 to match, it is possible to accurately perform bottom expansion excavation with a planned bottom expansion hole wall without causing collapse.

As explained above, with the excavation record monitoring and recording device of this invention, the entire contents of the excavation work from the start to the end of excavation can be retrieved as recorded data, and even during excavation work, the excavation depth and excavation status can be monitored and judged. It is easy to perform, and in particular, it is possible to obtain recorded monitoring data for bottom widening excavation after direct excavation, which has not been possible in the past, and it is also possible to control bottom widening excavation using recorded data of bottom widening excavation. As a result, it has become possible to dramatically improve the understanding and monitoring of the excavation status during excavation work, and it has also made it possible to collect highly accurate excavation data.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing an embodiment of this invention together with an excavator during excavation work, and FIG. 2 is an explanatory diagram showing an example of the recorded contents of the X-Y recorder obtained by this invention. FIG. 3 is an explanatory diagram showing a bottom-expanded excavation hole. 1... Main body of the drilling machine, 2... Main bit,
3... Bottom expansion bit, 4... Depth meter, 5
...Tape reel, 6...Stainless steel tape, 7...Pulse converter, 8...
Digital/analog converter, 9...X-Y recorder, 10, 11... Switch circuit, 12...
...Position detector, 13...Hydraulic cylinder,
14... Link mechanism, 15... Converter, 16... Cylinder rod.

Claims (1)

[Scope of Claim for Utility Model Registration] An excavation record monitoring device that records and displays the excavation depth of an excavator and the angle of the enlarged hole wall, one end of which is wound around a tape reel, the other end of which is attached to the excavator body, A stainless steel tape with small holes drilled at intervals, an optical detection means for optically detecting the small holes in the stainless steel tape, a pulse converter for counting the output signal of the optical detection means, and a digital converter for converting the output signal of the pulse converter. A depth gauge that provides a depth signal of the excavator, a position detector that detects the amount of displacement of a hydraulic cylinder rond connected to an enlargement bit via a link mechanism, and the position It is composed of a converter that converts the output signal of the detector into a signal representing the bottom expansion diameter, and a bottom depth meter that gives the bottom expansion diameter, and the depth signal of the depth meter is inputted to draw the excavation depth along the time axis. An excavation record monitoring device comprising: an X-Y recorder that inputs the depth signal and the post-bottom expansion signal from the bottom expansion meter to draw the angle of the bottom expansion hole wall.