JPH10184263A - Hold excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect that a suspended excavator has reaches the bottom of an objective hole to be excavated for a hole excavator with the handing up and down of the excavator. SOLUTION: A moving sieve 11 is interlocked with a second excavator, and a fixed sieve 12 is interlocked with a fixed frame 62 forming the upper part of a tower device 6. A hanging rope 7 let out from a winch 8 is wound on the moving sieve 11 and fixed sieve 12, and the front end section 7a is interlocked with an interlocking frame 61 provided to the excavator. A load cell 13 as a detection device is provided to an interlocking part between the fixed sieve 12 and fixed frame 62 to constitute a joint device between both of them. When the hanging rope 7 is let out to suspend the excavator, tensile force applied to the hanging rope 7 is always detected by the load cell 13, and when this tensile force becomes lower than tensile force set in advance, a decision signal informed of the fact that the second excavator reaches the bottom of an objective hole to be excavated is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hole excavator for excavating a vertical hole having a relatively large hole diameter and depth in the ground.
In particular, the present invention relates to a hole drilling apparatus suitable for a case where it is necessary to repeatedly lift and lower an excavator during excavation.

[0002]

2. Description of the Related Art FIG. 7 is a front view showing an example of a hole digging device previously proposed by the present applicant. In the figure, 1 is a ground to be excavated, 2 is an advanced hole having a relatively small hole diameter excavated in the ground 1 using a first excavator (not shown) in advance,
Reference numeral 3 denotes a guide rod inserted from the ground into the advanced hole 2, 4 denotes a second excavator that excavates a vertical hole having a larger diameter than the advanced hole 2 along the guide rod 3, 5 denotes the second excavator
The excavation target hole which is the above-mentioned vertical hole excavated in the ground 1 using the excavator 4 described above, 6 is a turret apparatus erected on the ground, and 7 is a suspension made of a wire rope for lifting and lowering the second excavator 4. A rope 8 is a winch for feeding and rewinding the suspension rope 7. In addition to the above, in addition to the above, the gondola 9 used for transporting workers and equipment necessary for hole work such as liner plate mounting work in the excavation target hole 5, and the gondola 9 are lifted and lowered. A hanging device 10 is provided. In addition, the liner plate attached to the hole wall in the excavation target hole 5 in the above-described liner plate attaching operation prevents the hole wall from collapsing due to the influence of wind and water or an earthquake.

The drilling target hole 5
When the excavation is to be performed, first, the advanced hole 2 is excavated in advance with the first excavator, and then the guide rod 3 is inserted into the advanced hole 2, and then the second excavator is moved along the advanced hole 2. 4
Is operated to excavate the excavation target hole 5. In this case, the second excavator 4 is not always suspended at the bottom of the excavation target hole 5 until the excavation of all the excavation target holes 5 is completed. For example, when the excavator 4 is continuously operated to advance the excavation of the excavation target hole 5, sediment generated by the excavation is collected in a sediment storage unit (not shown) provided in the second excavator 4. , Target drilling hole 5 to a predetermined depth
At the time of excavation, the amount of collected earth and sand reaches the limit amount that can be collected in the earth and sand storage part, and it becomes impossible to continue excavation as it is. For this reason, each time the excavation target hole 5 is excavated to a predetermined depth, the operation of the second excavator 4 is temporarily stopped, and then the winch 8 is operated to rewind the suspension rope 7 so as to rewind the second excavator. 4 lifted to the ground,
The earth and sand collected in the earth and sand storage part is discharged to the ground, the winch 8 is operated again, and the suspension rope 7 is paid out, thereby suspending the second excavator 4 at the bottom of the excavation target hole 5.
Must be carried out. When suspending the second excavator 4 from the ground again to the bottom of the excavation target hole 5 due to such an earth removal operation, the second excavator 4
When the lowermost end of the excavator reaches the bottom of the excavation target hole 5, the operation of the winch 8 must be stopped, and the extension of the suspension rope 7 for suspending the second excavator 4 must be stopped. Therefore, it is necessary to grasp the excavation depth of the excavation target hole 5 at the present time as accurately as possible.

Conventionally, such excavation depth is grasped, for example, by an operator who directly controls the operation of the second excavator 4 by storing the extension length of the suspension rope 7 at that time. . Alternatively, a depth gauge composed of a rotary encoder is attached to the winch 8 around which the hanging rope 7 is wound, and the extension length of the hanging rope 7 is automatically obtained according to an output signal obtained from the depth gauge. .

[0005]

In the case where the operator memorizes the excavation depth of the excavation target hole 5 by memorizing the extension length of the hanging rope 7 at that time, as in the case of the former described above, there is an error in memory. There is a concern that this will occur. When such a memory difference has occurred, when the second excavator 4 is suspended from the ground to the bottom of the excavation target hole 5 again,
Although the lowermost end of the excavator 4 has already reached the bottom of the excavation target hole 5, a situation occurs in which the suspension rope 7 continues to be pulled out excessively.

On the other hand, as described above, the winch 8
Also, when the excavation depth of the excavation target hole 5 is to be grasped by automatically calculating the extension length of the suspension rope 7 in accordance with the output signal obtained from the depth gauge attached to the second excavator 4, the second excavator 4 is not grounded. During the lifting, the hole wall of the excavation target hole 5 collapses for some reason, and unexpected earth and sand is deposited on the bottom of the excavation target hole 5. When such unexpected sedimentation occurs, if the second excavator 4 is suspended from the ground again to the bottom of the excavation target hole 5 without knowing the fact, the second excavator 4 Although the lowermost end of the rope has already arrived at the bottom of the excavation target hole 5, a situation occurs in which the suspension rope 7 continues to be pulled out excessively.

As described above, if the extension of the suspension rope 7 is continued excessively without knowing that the lowermost end of the second excavator 4 has already arrived at the bottom of the excavation target hole 5, the vertical excavation is performed until then. The hanging rope 7 stretched in the direction is relaxed. Thereafter, when the winch 8 is operated to rewind the hanging rope 7 in order to lift the second excavator 4 without noticing that the hanging rope 7 has relaxed, the winch 8 is originally arranged in an orderly manner. There is a concern that the suspension rope 7 to be wound around may be irregularly wound. And
When the suspension rope 7 is randomly wound, excessively abraded portions of the suspended rope 7 are liable to be damaged, and the life of the suspension rope 7 is shortened. Further, particularly when the degree of turbulence is large, the hanging rope 7 may fall off from the winch 8, and if such a drop of the hanging rope 7 occurs, the excavation work must be interrupted. The interruption of drilling greatly reduces the efficiency of excavation work.

When the extension length of the suspension rope 7 is automatically obtained in accordance with an output signal obtained from a depth gauge mounted on the winch 8, if the above-mentioned irregular winding occurs, the winding of the suspension rope 7 around the winch 8 is performed. The diameter changes so as to be larger than usual, and a detection error occurs in the excavation depth. As a result, there is a concern that the degree of excessive extension of the hanging rope 7 and the efficiency of the excavation work may be further increased.

Accordingly, an object of the present invention is to provide a hole excavator capable of reliably detecting that the second excavator has reached the bottom of the excavation target hole when suspending the second excavator in the excavation target hole. To provide.

[0010]

To achieve the above object, a drilling apparatus according to a first aspect of the present invention comprises: a first drilling machine for drilling an advanced hole in the ground; and a first drilling machine. A second excavator guided by the guide rod to excavate a target excavation hole having a diameter larger than the advanced hole in the ground, and a second excavator guided by the guide rod. In a hole excavator provided with a hanging rope for lifting and hanging the hanging rope and a winch for feeding and rewinding the hanging rope, a detecting means for detecting a magnitude of tension applied to the hanging rope, and a detecting means for detecting the magnitude of the tension applied to the hanging rope. A determining means for outputting a predetermined determination signal when the magnitude of the tension becomes smaller than a preset tension.

According to the first aspect of the present invention, the detecting means for detecting the magnitude of the tension applied to the hanging rope and the judging means for judging the magnitude of the tension are provided, as described above.
If the determination signal output from the determination means is constantly monitored, it can be instantaneously determined whether the suspension rope has relaxed based on whether the magnitude of the tension detected by the detection means has become smaller than a predetermined set tension. . This makes it possible to reliably detect that the second excavator has reached the bottom of the excavation target hole. Therefore, when the winch is operated again to lift the second excavator, the suspension rope can be unwound at any time in an orderly manner, and there is no fear of causing irregular winding.

According to a second aspect of the present invention, there is provided the hole excavator according to the first aspect, wherein a tip of the two ends of the suspension rope that is different from a side wound around the winch is provided. A locking frame to which the portion is locked, and a fixed sheave around which the hanging rope is wound and fixed to a predetermined fixed frame, wherein the detecting means is constituted by a load cell, and the load cell is fixed to the fixed cell. It is provided on at least one of an engaging portion between a sheave and the fixed frame, and a locking portion between the distal end portion of the hanging rope and the locking frame.

According to the second aspect of the invention, the magnitude of the tension applied to the suspension rope can be easily detected by the load cell. Such a load cell is easily available, low-cost, and excellent in practicality.

According to a third aspect of the present invention, there is provided the drilling apparatus according to any one of the first and second aspects, further comprising a depth gauge for determining a depth which is the depth of the drilling target hole. It is.

According to the third aspect of the present invention, the depth when the second excavator arrives at the bottom of the excavation target hole, that is, the depth of the vertical hole can be obtained by the depth gauge. By recording, for example, the depth detected by the above, that is, the depth when the second excavator arrives at the bottom of the excavation target hole, the obtained depth can be used for improving the excavation work efficiency.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a hole drilling apparatus according to the present invention will be described in detail with reference to the drawings.

FIG. 1 to FIG. 3 are views showing the overall configuration of an embodiment of a hole excavating apparatus according to the present invention. FIG. 1 is a front view, FIG.
Is a longitudinal sectional view showing the excavator in FIG. 1 in detail, and FIG. 3 is a plan view. FIG. 4 is a view showing in detail a main part of an embodiment of the hole drilling apparatus according to the present invention, and shows a state where the vicinity of the winch 8 is viewed from the direction of arrow L in FIGS. 1 and 3. FIG. 5 is a block diagram showing a control system provided in an embodiment of the hole drilling apparatus of the present invention. FIG. 6 is a diagram illustrating an example of a winch control panel provided in an embodiment of the hole excavating apparatus of the present invention. 1 to 6, the same components as those of the hole digging apparatus shown in FIG. 7 are denoted by the same reference numerals.

As shown in FIG. 4, reference numeral 7a denotes a tip of the both ends of the suspension rope 7 which is different from the side wound around the winch 8, and 61 denotes an excavator to which the tip 7a is locked. 4, a fixed frame forming the upper part of the tower device 6, 11 a second excavator 4
The moving sheave, which is lifted and lowered together with the second excavator 4 in accordance with the lifting and rewinding of the suspension rope 7 by the winch 8 in a state where the suspension rope 7 is wound, is attached to the fixed frame 62 with the suspension rope 7 wound. The fixed sheave 13 to be engaged is a load cell which constitutes a detecting means for detecting the magnitude of the tension applied to the suspension rope 7 in a state provided at the engagement portion between the fixed sheave 12 and the fixed frame 62. The load cell 13 has a fixed frame 62 at the upper end.
In addition, a lower end constitutes a connecting tool connected to the fixed sheave 12.

As shown in FIG. 1, the second excavator 4 has a stationary portion 41 that is kept stationary with respect to the ground 1 and a guide that is connected to the stationary portion 41 and guides the stationary portion 41. Moving part 4 movable along the direction of extension of rod 3
And 2. The stationary part 41 is provided with fixing means 411 for fixing the stationary part 41 to the ground 1 in a stationary state. An excavator for excavating the ground 1
For example, earth drill bucket 421, fixed bit 422
a, a diameter expanding cutter 422b, and a rotating means 423 for rotating these excavating tools shown in FIG. Further, a propulsion unit 43 for propelling a drilling tool such as the above-described earth drill bucket 421 is provided between the stationary unit 41 and the moving unit 42 so as to be connected thereto. Here, the vertical section shown on the left side of FIG. 2 shows a state in which the propulsion means 43 is fully extended and the excavator is sufficiently propelled,
The vertical section shown on the right side of FIG. 2 shows a state in which the propulsion means 43 is minimized and the excavator is not propelled.

FIG. 5 shows a control system provided in the present embodiment. That is, in FIG.
Numeral 100 denotes a control unit which constitutes a judging means for making a judgment to be described later based on a magnitude relationship between a tension detected by the load cell 13 and a set tension to be described later. A winch operation indicator for instructing return, 112 is a notification output device for notifying a worker that the suspended second excavator has reached the bottom of the vertical hole;
121 is a winch driving solenoid valve for operating / stopping the winch 8, 122 is a rotary encoder for outputting a signal corresponding to the number of rotations of the winch 8, 123 is a feed length of the suspension rope 7 for outputting a signal output from the rotary encoder 122. This is a signal conversion unit for converting the signal into a signal representing the degree. The rotary encoder 122 and the signal converter 12 described above
Reference numeral 3 denotes a depth gauge that determines the depth that is the depth of the excavation target hole 5.

The control unit 100 includes a CPU 101 for performing main control as a determination unit, a memory 102 for storing in advance a set tension value to be compared with the detected tension value, and a winch operation indicator 111. A contact input unit 103 that inputs an input signal to the CPU 101, an AD converter 104 that converts an analog signal from the load cell 13 into a digital signal for the control unit 100, and outputs a drive signal from the CPU 101 to the winch drive solenoid valve 121. The CPU 101 outputs a signal corresponding to the rotation speed of the winch 8 input from the solenoid valve drive output unit 105 and the signal conversion unit 123.
Is provided with an input unit 106 for inputting the information to the.

As shown in FIG. 6, the control unit 100, the winch operation indicator 111, the notification output device 11
For example, the winch control panel 14 that includes the control unit 2 is disposed at a height that can be reached by a worker of the mast 63 of the tower 6. In the figure, 14a is a display for displaying information on the hanging rope 7, 14b is a warning lamp for warning the worker by blinking, 14c is a buzzer for warning the worker by sounding, 14d is a warning buzzer for warning the worker. An operation lever for receiving an operation instruction. Here, the display 14a, the warning lamp 1
4b and the warning buzzer 14c correspond to the notification output device 112, and the operation lever 14d corresponds to the winch operation indicator 111.

The operation of forming the target excavation hole 5 performed using the embodiment having the above-described configuration will be described.

First, the relationship of the tension acting on the suspension rope 7 provided in the above-described configuration will be described. Figure 1
As shown in FIG. 4, the second excavator 4 is suspended when the suspension rope 7 is extended by the winch 8, and when the suspension rope 7 is unwound by the winch 8, the second excavator 4 is suspended. Here, the suspension rope 7 unreeled from the winch 8 is first wound around the movable sheave 11 attached to the upper part of the second excavator 4, and then attached to the fixed frame 62 which is a part of the tower 6. After being wound around the fixed sheave 12, the distal end portion 7a is locked to a locking frame 61 which is a part of the excavator 4. Then, when the second excavator 4 is lifted by the hanging rope 7, the tension applied to the hanging rope 7 due to the load of the second excavator 4 is reduced by the moving sheave 1.
A winch 8 and a fixed sheave 12
Are applied with a force proportional to the magnitude of the tension.
The magnitude of the force proportional to the magnitude of the tension is detected by the above-described load cell 13 provided at the portion where the fixed sheave 12 and the fixed frame 62 are engaged.

Next, the relationship between the control systems shown in FIG. 5 will be described. As shown in FIG. 4 to FIG.
Detects the magnitude of the tension applied to the hanging rope 7 and inputs an analog signal representing the magnitude of the tension to the control unit 100. The rotary encoder 122 is connected to the suspension rope 7
And outputs a signal corresponding to the number of rotations at the time of feeding or rewinding. The signal conversion unit 123 converts the signal from the rotary encoder 122 to obtain a signal indicating the current feeding length of the hanging rope 7, and inputs the signal to the control unit 100. In the control unit 100, the AD converter 104 converts an analog signal from the load cell 13 into a digital signal and inputs the digital signal to the CPU 101. The CPU 101 includes an input unit 1
06, the signal indicating the current feeding length of the suspension rope 7 input from the signal conversion unit 123 via the A / D converter 1
A signal indicating the magnitude of the current tension applied to the hanging rope 7 input from 04 is output to the notification output device 112 at all times. Further, the CPU 101 compares the magnitude of the current tension obtained as described above with the set tension previously stored in the memory 102, and when the magnitude of the inputted tension is smaller than the set tension, the notification output device 11
2 to output a determination signal. Here, when the value of the set tension is set to, for example, 25% of the load of the second excavator 4, the second excavator 4 is normally suspended on the winch 8 and the second excavator 4 When the tension corresponding to about 50% of the load on the suspension rope 7 and the load cell 13 is applied to the suspension rope 7 and the load cell 13, the determination signal is not output. On the other hand, the second
Of the excavator 4 arrived at the bottom of the excavation target hole 5 and was not properly suspended.
When the magnitude of the tension applied below 25% of the load of the second excavator 4, the CPU 101 outputs the determination signal to the notification output device 112.

A winch control panel 14 in FIG. 6 corresponding to the notification output device 112 in FIG. 5 displays a number corresponding to a signal that is constantly output from the CPU 101 and indicates the current feeding length of the hanging rope 7. 14A, and when the CPU 101 outputs the determination signal, the warning lamp 14b and the warning buzzer 14c are activated. The worker is alerted by the blinking of the warning lamp 14b and the sounding of the warning buzzer 14c.
Know that the excavator 4 has reached the bottom of the excavation target hole 5.
At this time, the operator operates the operation lever 14d provided on the winch control panel 14 to instruct the winch 8 to stop. The stop instruction signal output in response to the stop instruction is
It is input to the contact input unit 103 of the control unit 100.

As shown in FIG. 5, the contact input section 103 of the control section 100 transmits the input stop instruction signal to the CPU 101.
To enter. The CPU 101 causes the solenoid valve drive output unit 105 to output a stop control signal for stopping the winch 8 in response to the stop instruction signal. Winch drive solenoid valve 12
1 drives according to a stop control signal input from the solenoid valve drive output unit 105 to stop the operation of the winch 8.
Thus, the suspension of the suspension rope 7 is stopped.

The formation of the excavation target hole 5 using the above-described embodiment is performed as follows.

When excavating the target hole 5 as shown in FIG. 1, a first excavator such as a boring machine (not shown) is used to excavate an advanced hole 2 having a relatively small diameter in the ground 1 in advance. deep. Then, the guide rod 3 is inserted into the advanced hole 2 formed to a sufficient depth. On the ground, a tower 6 having a mast 63 is erected,
The winch 8 and the suspending device 10 with the gondola 9 suspended are mounted on the fixed frame 62 of the tower device 6.

First, a preliminary hole having a size capable of accommodating, for example, one second excavator 4 is excavated in the ground 1, and the preliminary hole is subjected to a process for preventing collapse of the hole wall. When carrying out this process, a worker in charge of work inside the hole for preventing collapse and necessary equipment such as a liner plate were loaded on the gondola 9, and the gondola 9 was positioned just above the preliminary hole. In this state, the gondola 9 is suspended inside the preliminary hole by operating the suspending device 10 and extending the suspending rope 9a. After stopping the gondola 9 in the preliminary hole, the worker on the gondola 9 performs an inside hole operation of attaching a liner plate to the hole wall. When the process of preventing the collapse is completed, the suspending device 10 is operated to activate the suspending rope 9.
Then, the gondola 9 loaded with the worker in charge of the work inside the hole for the collapse prevention process and the unnecessary equipment is lifted above the spare hole. Then, the winch 8 and the suspension device 10 on the fixed frame 62 are moved in the horizontal direction, and the second
Excavator 4 is positioned just above the preliminary hole. Then, the second excavator 4 is suspended along the guide rod 3 to the bottom of the preliminary hole by operating the winch 8 and paying out the suspension rope 7. Then, the second excavator 4 is operated to start excavation of the vertical hole connected to the preliminary hole. In the excavation of the above-described vertical hole, that is, the excavation target hole 5 by the second excavator 4, the stationary part 41 is fixed to the surrounding hole wall by the fixing means 411, and the earth drill bucket 42 provided in the moving part 42.
The propulsion means 43 is operated to move the moving part 42 in the direction of extension of the guide rod 3, that is, vertically downward with respect to the stationary part 41 while rotating the excavating tool such as the drill 1 and the diameter-enlargement cutter 422 with respect to the ground 1. Done by

When the second excavator 4 excavates the excavation target hole 5, for example, a boulder is generated for some reason, and it may become difficult to continue the excavation by the second excavator 4. . In this case, after the second excavator 4 is temporarily stopped, the winch 8 is operated to rewind the suspension rope 7, thereby lifting the second excavator 4 to the ground. Then, the winch 8 and the suspension device 10 are moved in the horizontal direction, and the gondola 9 on which the worker is riding is moved to the excavation target hole 5.
After the positioning, the gondola 9 is suspended from the bottom of the target excavation hole 5. After the worker on the gondola 9 collects the boulders on the gondola 9 using a gripper (not shown) or the like, the hanging device 10 is operated again to rewind the hanging rope 9a, thereby lifting the gondola 9 to the ground.
Then, the winch 8 and the suspension device 10 are moved in the horizontal direction, and the second excavator 4 is positioned again just above the excavation target hole 5, and then the second excavator 4 is moved along the guide rod 3.
Is suspended to the bottom of the excavation target hole 5, and the excavation of the excavation target hole 5 is restarted.

The work inside the hole other than the work of removing the boulders, for example, the work inside the hole for collecting the spring water and rainwater collected at the bottom of the target drilling hole 5 or the work inside the earth drill bucket 421 by excavating the ground 1. When the soil is removed from the ground, the winch 8 is also discharged according to the above-described procedure.
The second excavator 4 is lifted to the ground and the second
Of the excavator 4 at the bottom of the excavation target hole 5 is performed.

As described above, according to the present embodiment, the magnitude of the tension currently applied to the hanging rope 7 is made smaller than the magnitude of the tension when the second excavator 4 is normally suspended. By constantly comparing with the set tension which has been set and determining whether or not the hanging rope 7 has relaxed, it is possible to reliably determine whether or not the second excavator 4 has reached the bottom of the excavation target hole 5. Can be detected. The operator knows that the second excavator 4 has arrived at the bottom of the excavation target hole 5 by operating the warning lamp 14b and the warning buzzer 14c of the winch control panel 14, and at this time, operates the operation lever 14d to winch. When the suspension rope 8 is stopped, it is possible to prevent the suspension rope 7 from being excessively extended and loosened. Therefore, when the winch 8 is operated again to lift the second excavator 4, the suspension rope 7 can be rewound in an orderly manner at any time, and there is no fear of causing irregular winding. Further, the magnitude of the tension applied to the hanging rope 7 can be detected by a load cell 13 which can be easily obtained at a relatively low cost.
It is excellent in practicality.

In the present embodiment, the load cell 13 as the detecting means is provided at the portion where the fixed sheave 12 and the fixed frame 62 are engaged. Instead, the load cell 13 is connected to the tip 7a of the hanging rope 7 instead. A configuration in which the load cell 13 is provided at a portion where the stop frame 61 is engaged with the stop frame 61 may be employed. Further, in the present embodiment, the worker is notified of the arrival of the second excavator 4 at the bottom of the excavation target hole 5 by operating the warning lamp 14b and the warning buzzer 14c of the winch control panel 14, and the work is performed accordingly. The member operates the operation lever 14d to stop the extension of the suspension rope 7 by the winch 8, but instead, when the magnitude of the tension detected by the load cell 13 becomes smaller than the set tension, The CPU 101 may immediately output a stop control signal for stopping the winch 8 to the solenoid valve drive output unit 105, so that the reeling out of the suspension rope 7 by the winch 8 may be automatically stopped.

[0035]

As described above, according to the first aspect of the present invention,
According to the inventions of (1) to (4), it is possible to surely know that the second excavator has reached the bottom of the excavation target hole by detecting whether or not the suspension rope is relaxed. When the winch is operated to lift the excavator, the suspension rope is always rewound in an orderly manner, thereby preventing occurrence of irregular winding. Therefore, it is possible to improve the durability and life of the hanging rope as compared with the related art, and to constantly maintain the efficiency of the excavation work.

[Brief description of the drawings]

FIG. 1 is a front view showing an entire configuration of an embodiment of a hole drilling apparatus according to the present invention.

FIG. 2 is a longitudinal sectional view showing the excavator in FIG. 1 in detail.

FIG. 3 is a plan view showing the overall configuration of an embodiment of the hole drilling apparatus of the present invention.

FIG. 4 is a diagram showing in detail a main part of an embodiment of the hole drilling apparatus of the present invention.

FIG. 5 is a block diagram showing a control system provided in an embodiment of the hole drilling apparatus of the present invention.

FIG. 6 is a diagram illustrating an example of a winch control panel provided in an embodiment of the hole drilling apparatus of the present invention.

FIG. 7 is a front view showing an example of a hole drilling device previously proposed by the present applicant.

[Explanation of symbols]

 Reference Signs List 1 ground 2 advanced hole 3 guide rod 4 second excavator 41 stationary part 411 fixing means 42 moving part 421 earth drill bucket 422a fixing bit 422b enlarged diameter cutter 423 rotating means 43 propulsion means 5 drilling target hole 6 turret device 61 locking Frame 62 Fixed frame 63 Mast 7 Hanging rope 7a Tip 8 Winch 9 Gondola 10 Hanging device 11 Moving sheave 12 Fixed sheave 13 Load cell 14 Winch control panel 100 Control unit 101 CPU 102 Memory 111 Winch operation indicator 112 Notification output device 122 Rotary encoder

Claims (4)

[Claims] A first excavator for excavating an advanced hole in the ground; a guide rod inserted into the advanced hole formed by the first excavator; and a guide rod guided by the guide rod, Hole excavation including a second excavator for excavating a target excavation hole having a diameter larger than an advanced hole, a suspension rope for lifting and lowering the second excavator, and a winch for feeding and rewinding the suspension rope. In the apparatus, detecting means for detecting the magnitude of the tension applied to the hanging rope, and judging means for outputting a predetermined judgment signal when the magnitude of the tension detected by the detecting means becomes smaller than a preset set tension And a hole drilling apparatus characterized by comprising: 2. A locking frame for locking a tip of a different side of the both ends of the hanging rope from the side to be wound around the winch, and the hanging rope is wound and fixed at a predetermined position. A fixed sheave attached to a frame, wherein the detection means is constituted by a load cell, and the load cell is connected to the fixed sheave and the fixed frame, and the distal end portion of the suspension rope; The hole drilling device according to claim 1, wherein the hole drilling device is provided on at least one of a locking portion with the locking frame. 3. The drilling apparatus according to claim 1, further comprising a depth gauge for determining a depth that is a depth of the drilling target hole. 4. A stationary part in which the second excavator is kept stationary with respect to the ground, and a moving part connected to the stationary part and movable along an extension direction of the guide rod. The stationary part is provided with fixing means for fixing the stationary part in a stationary state with respect to the ground, and the moving part is provided with a digging tool for digging the ground and a rotating means for rotating the digging tool. A propelling means for propelling the excavating tool is provided between the stationary part and the moving part.
A hole drilling device according to any one of the above.