JPS63526A - Bottom-expanded pit measurer for bottom-expanded pit excavator - Google Patents

Abstract

PURPOSE:To raise the operability of a measure for bottom-expanded pit by a method in which, a sensor for the opening amount of a cutter is attached to a bucket, a sensor for lowering amount of the bucket, signals from the sensors are transmitted by a transmitting and receiving device, and the detected values are image-displayed and printed out. CONSTITUTION:A sensor 1 for opening amounts of cutter is attached to a bucket 101, and the detected signals S1 of the opening amount of cutter unit are transmitted to a receiver 20. A sensor 10 for lowering amounts of bucket is attached to the rotary base 23, and the detected signals S2 of the lowering amount of the bucket 101 are sent out. The signals S1 and S2 are transmitted by the transmitter-receiver 20-30, and the detected values are put in a computer unit 40 for image-displaying and printing-out. The bucket 101 is lowered into a well 200, and the cutter unit is slowly opened to excavate a conical bottom in order to form a bottom-expanded pit 201. A highly accurate bottom-expanded pit can thus be easily formed.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention provides a system that can automatically measure the condition of a bottom hole in order to improve the workability and excavation accuracy of an excavator that forms a bottom hole. This invention relates to a bottom hole measuring device for a bottom hole excavator.

(Conventional technology) Conventionally, when constructing cast-in-place piles in the ground, the lower end of the column of the pile is enlarged (generally referred to as an "expanded bottom shaft").
Efforts have been made to increase the support horns.

As a machine for digging a well with an enlarged bottom (this is called an "expanded bottom pit") for forming such a pit in place, for example, Japanese Patent Publication No. 58-21079←
A split-packet rotary drilling rig, as shown, has been proposed.

(Problem to be solved by the invention) However, conventionally, when digging a bottom hole with a bottom hole excavator, there was no way to accurately know the depth, the amount of expansion of the bottom hole, etc. Most of them relied on their intuition.

Due to the cloudy weather, it required skilled workers to accurately form the bottom expansion shaft, which limited the ability to improve workability and efficiency.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an expandable/contractable device mounted on the packet at an appropriate position on the packet or rotating shaft of the bottom-expanding tunnel excavator. An expansion amount detector that electrically detects the amount of expansion of the cutter is attached, and a descent amount detector that detects the amount of descent of the packet is attached to a rotating part including the rotating shaft, and the expansion amount detector The detection signal from the drop detector is transmitted by a transmitter/receiver using electromagnetic wave signals, and the detected value of the received packet expansion amount and the detected value of the packet drop amount is displayed as an image and printed out. It is something.

(Function) The above-mentioned expansion amount detector and descent amount detector can automatically detect the expansion state of the bottom mine and its depth, and the receiver receives the detected information and displays the contents as an image. You can know by

Therefore, by performing excavation work while visually checking the detected information, the worker can easily form a highly accurate bottom expansion shaft.

Furthermore, since it is necessary to attach the expansion amount detector and the descent amount detector to the packet or rotating shaft, transmitting these detection signals by wire requires a rotary connector such as a slip ring, which reduces noise. This may cause contamination or failure, so in the present invention, the above problem is solved by providing a transmitter on the rotating part including the rotating shaft and transmitting the detection information using a wireless signal.

Furthermore, since the present invention allows detection information to be recorded on the spot using a printer, the details of the construction work can be confirmed or certified at a later date.

(Example) FIG. 1 shows the configuration of an embodiment of the present invention.

The expansion amount detector 1 is attached to a packet 101 of a bottom expansion mine excavator 100 shown in FIG.

The packet 101 is a kelly bar suspended from a crane boom 111 of a crawler crane 110 so as to be able to rise and fall freely.
By rotating the Kelly bar 112 by a rotary drive device 114 attached to the lower end of the Kelly bar 112 and fixed to the arm 113, the packet 101 is moved to the Kelly bar 112.
rotates as one. That is, the Kelly bar 112 serves as the rotation axis of the packet 101.

As shown in FIG. 3, the packet 101 includes a plurality of cutter units 102, and these cutter units 102 are connected to an arm 10 that constitutes a pantograph mechanism
3 to 106, the outer cylinder 107 and the inner cylinder 1
It is connected to 08.

A hydraulic cylinder 109 is installed inside the outer cylinder 107 and the inner cylinder 108.
09 is contracted, the inner cylinder 108 moves upward, the pantograph mechanism opens, and the cutter unit 102 expands.

Then, as shown in FIG. 2, a well 200 with a desired depth is formed in the ground 300 using an earth drill or the like in advance, and the packet 101 is inserted into the well 200 into the seventh hole of the cutter unit. 02 is lowered in the contracted state and set at the A1 position in the figure.

From this state, the Kelly bar 112 is rotated to rotate the bucket 101, the cutter unit 102 is gradually expanded, and the packet 101 is also lowered.

As a result of this operation, the bottom of the well 200 is cut into a conical shape to form an enlarged bottom hole 201 (the packet 101 is in the A2 position).

The expansion amount detector 1 is connected to the force soter unit).
102, and is equipped with an encoder (rotary encoder) 2, as shown in FIG.

As shown in FIG. 3, this expansion amount detector 1 is located at a position where the mounting shaft 103a of one of the arms 103 and the shaft 3 of the encoder 2 can be linked (using a chain or gear, etc.). installed on.

Therefore, as the pantograph mechanism including the 7-mm 103 expands, the mounting shaft 103a rotates, so the output of the encoder 2 becomes a signal representing the amount of expansion of the cutter unit 102.

The detection signal S of the expansion amount detector 1 is sent to t m 20 via the cord 5. The cord 5 passes through a shank lure fixed at an appropriate position on the bucket 101, and is wound around the cord reel 6. After the bucket is moved up and down, it is connected to the transmitter 20, and by the action of the reel 6, it moves up and down as the bucket moves up and down.
, the length of the cord 5 can be expanded or contracted.

Further, the origin switch 4 shown in FIG.
When the cutter unit 101 is contracted to the preset maximum contraction position, it is turned on by mechanical force to reset the detected value.

For example, as shown in FIG. 2, the transmitter 20 is installed below the rotary drive device 114 on a pedestal 23 that rotates in tandem with the Kelly bar 114. Although the base 23 rotates together with the Kelly bar 114, it is supported using a fixed bearing or the like so that it remains in a fixed position even when the Kelly bar 114 descends.

A descent amount detector 10 is attached to the pedestal 23.

This fall amount detector 10 is composed of a rotary encoder that detects the amount of rotation of a reel 12 that winds up a wire 11 whose tip is fixed to a bucket lO1.
When the wire 11 expands as the wire 101 descends, the reel 12 rotates and a detection signal Sz corresponding to the amount of the bucket float l-fall is output.

In addition, the origin switch 21 shown in FIG. It is turned on with a certain amount of force, and the above-mentioned detected value is calculated.

The transmitter 20 sends a detection signal Sl of the expansion amount of the cutter unit 102 detected by the expansion amount detector 1 and a detection signal S2 of the descent amount of the bucket 101 detected by the descent amount detector 10. It is converted into an electromagnetic wave signal and transmitted from the transmitting antenna 22.

This transmitting antenna 22 is also installed so as to rotate together with the Kelly bar 114. .

Three receiving antennas are attached to a non-rotating part of the crawler crane 110, for example, the upper part of the arm 113 near the transmitter 20, and the transmitting antenna 2
2. Receives the electromagnetic wave signal transmitted from 2.

The received signal received by the receiving antenna 31 is transmitted to the receiver 39
After signal processing (detection, amplification, etc.) in the computer unit 40, the detection signal SI of the expansion amount of the cutter unit and the detection signal S2 of the bucket descent amount are extracted
is input to.

The computer unit 40 includes a color CRT 70, D
C/ACC/Formula-ta50. It is installed in the cockpit of the crawler crane 110 together with the switch box 80 .

DC/ACC/Type-ta 50 is crawler crane 110
Converts the DC power of the battery 60 installed in the computer unit 40 and color CRT into AC power
70, printer 90, and receiver 30.

The computer unit 40 performs processing for displaying the input detection signal Sl of the amount of expansion of the cutter unit and the detection signal S2 of the amount of descent of the bucket on the color CRT 70.

The color CRT 70 displays a screen as shown in FIG. This display shows Hekeso L-101 well 200
is displayed by turning on the reference point 81 of the switch box 80 after descending to the bottom of the screen.

The display contents include a pictorial display of the well 200 and the bucket 101, a numerical display of the descent amount of the bucket 101, that is, the depth position (indicated by "Fukasa" in the figure), and a numerical display of the diameter of the bottom expansion hole. (Displayed as "Kakutikai" in the figure), numerical display of the diameter of the packet (displayed as "Packet" in the figure), and scale display of "Fukasa" (displayed on the left side of the figure). There is).

Then, when the excavation work of the bottom expansion shaft 201 is started, the display of "Fukasa", "Packet", and "Kaftikei" is changed based on the detection signals S, S2, and
The position and size of the pictorial representation 101a of the packet change. Furthermore, the pictorial display 201a of the expanded bottom shaft 201 also expands as the packet expands.

Therefore, the operator, while looking at the above screen, excavates until the area around the pictorial display 201a of the expanded bottom shaft is completely aligned with the set line 201b, thereby creating the expanded bottom shaft as designed.
01 can be formed.

When the worker confirms that the bottom expansion shaft has been formed as designed based on the display on the color CRT 70 screen, he finishes the excavation work and presses the end button 82 on the switch box 80.
Turn on. As a result, the color CRT7
The image displayed at 0 is printed out as is by the printer 90.

The printed image contents record the state of the bottom-expanding shaft at the end of the excavation work, so it can be used to confirm or prove the work contents.

Of course, if excavation work is interrupted due to rain, etc.,
By printing out the state of the bottom-expanding shaft at the time of interruption, it is possible to know in which state the work should be started when restarting the work, making the work easier even if the worker is replaced.

After printing is completed, switch box 80
If you turn on the end button 82 again, the color CR
The screen display of T70 is cleared.

Note that it is also possible to detect the position of the packet 101 in the well 200 (the amount of eccentricity with respect to the center of the well) from the amount of expansion of the cutter unit 102.

(Effects of the Invention) As explained in detail above, the present invention provides a detector that electrically detects the amount of descent of the packet of the bottom-expanding tunnel excavator and the amount of expansion of the cutter, and By installing a transmitter/receiver that uses electromagnetic wave signals to transmit detection signals, and an image display device that displays the received contents, it is possible to automatically detect the expansion status and depth of the bottom mine, and display the contents in images. It can be visually recognized.

Therefore, by performing excavation work while visually checking the detected information, the worker can easily form a highly accurate bottom expansion shaft.

In addition, since the expansion amount detector and descent amount detector must be attached to the packet or rotating shaft, a rotary connector such as a slip ring is required to transmit these detection signals by wire. However, in the present invention, the above problems can be solved by providing a transmitter on the rotating part including the rotating shaft and transmitting the detection information using a wireless signal. can.

Furthermore, since the present invention allows detection information to be recorded on the spot using a printer, the details of the construction work can be confirmed or certified at a later date.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a side view showing an example of an extended bottom pit excavator to which the embodiment shown in Fig. 1 is applied, and Fig. 3 is a diagram showing an example of the extended bottom pit excavator to which the embodiment shown in Fig. 1 is applied. FIG. 4 is an enlarged sectional view of the packet portion, and is a diagram showing an example of the contents of the screen displayed on the color CRT shown in FIG. 1. l... Expansion amount detector 2... Encoder 4.
... Origin switch 5 ... Code 10 ... Descent amount detector 20 ... Transmitter 21 ... Origin switch 22 ... Transmission antenna 30 ... Receiver (in
31...Receiving antenna 40...Computer unit 50...DC/ACC/formula-ta 70...Color C
RT80... Switch box 90... Printer 100... Bottom hole excavator 101... Packet 1
02...Cutter unit 103-106...Arm 103a...Mounting shaft 109...Hydraulic cylinder 110...Crawler crane 112...Kelly bar (rotating shaft) 114...Rotary drive device Sl. ...(Cutter unit) expansion amount detection signal S2
...(Packet) drop detection signal Same patent attorney
Oki Sugimura Diagram 3

Claims (1)

[Claims] 1. A bucket supported by the tip of a rotating shaft and equipped with a cutter that can be expanded and contracted is lowered into a well drilled in the ground, and the bucket is rotated while expanding the cutter. In a device for measuring the state of the bottom hole, which is installed in a bottom hole excavator that excavates around the bottom of the well to form a bottom hole by causing the bottom hole to form a bottom hole, the device is provided at an appropriate position of the bucket or the rotating shaft. hand,
an expansion amount detector that electrically detects the amount of expansion of the cutter; a descent amount detector that is attached to a rotating part including the rotation shaft and that electrically detects the amount of descent of the bucket; and the rotation shaft. a detection signal transmitter that is attached to a rotating part including the expansion amount detector and the lowering amount detector and transmits the detection signals from the expansion amount detector and the descent amount detector as electromagnetic wave signals; and a receiver that receives the transmission signal from the detection signal transmitter. , an image display device that displays images of the detected value of the expansion amount of the cutter and the detected value of the descent amount of the bucket received by the receiver; and a printer that prints the information displayed on the image display device. A bottom hole measuring device for a bottom hole excavator, characterized by comprising: