JP2539718B2 - Drilling and improved depth gauge for ground improvement machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling hole and an improved depth gauge for a ground improvement machine. More specifically, the drilling depth and improvement depth of the ground improvement machine are set, and the feed amount of the rod of the ground improvement machine is measured according to these set values, and the prepared hole of the ground improvement pillar, which is a cylindrical solid body, is measured. TECHNICAL FIELD The present invention relates to a drilling hole and an improved depth gauge of a ground improvement machine for accurately measuring and controlling the depth of drilling and the position depth (improvement range) of a ground improvement column.

[0002]

2. Description of the Related Art There is known a method of improving soft ground or the like to form a foundation ground. Among these, a ground improvement machine for forming a ground improvement column by injecting a ground improvement agent such as mortar into the ground is used. Although various ground improvement methods using a ground improvement machine have been proposed and implemented, first, a hole is drilled to a depth at which the ground is to be improved. This hole is drilled to the planned depth by rod rotation and stroke speed according to geological conditions. Next, the bit for excavation is replaced with a nozzle for injecting the ground improvement agent, and this nozzle is lowered to the deepest part of the drilled hole.

The ground improvement agent is injected under pressure from a nozzle through a hollow rod. At this time, the soil improvement pillar is formed while discharging the soil improvement agent from the tip of the rod. At this time, the ground improving agent is injected while rotating and pulling up the rod at a predetermined pulling speed and rotation of the nozzle. In this ground improvement machine, it is performed while injecting the ground improvement agent pressurized from the tip of the rod. When a predetermined depth position, that is, the depth position from the deepest part to the upper depth position (improvement range) is pulled up, the ejection of the soil improvement agent from the nozzle is stopped and the feed of the rod is stopped.

[0004]

It is desirable that the range of the drilled holes and ground improvement columns be measured as accurately as possible. If this measurement is inaccurate, the drilling depth and the position of the ground improvement column will be incorrect. If this goes wrong, it may cause serious problems in the subsequent construction. In addition, the measured drilling hole and the improved depth are displayed as numbers by an LED (light emitting diode) or the like, but it is important that the display is as easy as possible for human eyes to avoid misunderstanding or illusion.

Conventional drilling depth gauges and improved depth gauges lack attention in this respect. That is, since the conventional depth gauge only displays the distance from the hole entrance (hole opening), it is not possible to display the distance from the hole bottom when pulling up the rod from the hole bottom. In particular, when trying to improve the ground, the ground is improved from the bottom of the hole, so if the distance can be displayed from the bottom of the hole, the display will be easy for the operator to see.

Some ground improvement pillars have bump-shaped projections formed at regular intervals. In this case, the ascending rod must be stopped at regular intervals and the ground improving agent in the bump portion must be ejected at that position. It is not easy to perform this operation manually because of the distance traveled and the stop time. The present invention has been invented in such a background, and achieves the following objects.

An object of the present invention is to provide a drilling hole and an improved depth gauge for a ground improvement machine, which can select the distance display from the hole opening or the hole bottom of the drilling hole.

Another object of the present invention is to provide a drilling hole and an improved depth gauge for a ground improvement machine which can stop and control the feed of a rod at regular intervals.

[0009]

[Means for Solving the Problems] To solve the above problems, the following means are adopted.

A drilling depth gauge for a ground improvement machine according to the present invention comprises a rotary encoder (23) for detecting vertical movement of an excavating rod of the ground improvement machine, and this rotary encoder (2).
A counter (31) for receiving the output pulse of 3), and a storage means (3) for storing the drilling depth to be drilled.
3), a setting switch (36) for setting the drilling depth in the storage means (33), an indicator (34) for displaying at least the drilling depth, and the display ( As the drilling depth displayed in 34), a mode selecting means (37) for selecting a distance display from a hole mouth or a hole bottom to be excavated and data of the counter (31) are calculated to calculate the depth. And a central processing unit (32) for calculating the moving distance of the excavating rod and displaying it on the display (34).

The improved depth gauge of the ground improvement machine includes a rotary encoder (23) for detecting vertical feed of a rod of the ground improvement machine, a counter (51) for receiving an output pulse of the rotary encoder (23), and an improved depth gauge. Storage means (53) for storing the improved depth to be attempted, and a setting switch (56) for setting the improved depth and the step distance which is the feed interval of the rod in the storage means (53), An indicator (54) for displaying at least the distance from the hole bottom to be improved as the improved depth
And output means (60, 61) for outputting a stop signal for stopping the feed of the ground improvement machine for a predetermined time for each set step distance, and the counter (51).
Central processing unit (52) for calculating the moving distance of the rod and displaying it on the display (54).
Consists of

[0012]

In this hole digging depth meter, the rotary encoder mounted on the ground improvement machine detects the vertical movement of the excavating rod or the multiple pipe rod for supplying the ground improvement material. The output pulse is received by the counter and counted. The count value is calculated by the central processing unit and converted into a distance, and the drilling depth is displayed on the display. The display of the drilling depth can be freely selected by the mode selecting means, either the hole opening or the distance from the hole bottom.

In the case of the improved depth gauge, the distance from the hole bottom is displayed. Further, the improved depth meter can stop the feeding of the rod of the ground improvement machine for a predetermined time at each preset step distance to make a ground improvement column having a bump-shaped projection.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ground improvement machine will be described below with reference to the drawings. FIG. 1 is a front view of the ground improvement machine, and FIG. 2 is a left side view of the same. Frame 1
It is made of rigid structural material and has a substantially rectangular parallelepiped structure. A swivel head main body 2 is provided on the front surface of the frame 1 so as to be movable by being guided by two roller guides arranged on the frame 1. Two feed hydraulic cylinders 3, 3 are fixed above and below both sides of the swivel head body 2.

The piston rods 4 of the feed hydraulic cylinders 3, 3 are fixed to the upper part of the frame 1 via a flange 5. A hydraulic chuck body 6 for chucking a boring rod is provided above the swivel head body 2 via a spindle (not shown).

In the swivel head body 2, a hydraulic motor 7 for rotating a multi-tube (not shown, hereinafter referred to as a rod) such as a boring rod or a double tube via a spindle is provided. There is. While the rod is held by the hydraulic chuck body 6, the feed hydraulic cylinders 3, 3
Is carried out in the axial direction and rotated by the hydraulic motor 7. A hydraulic rod holder 8 is arranged below the swivel head body 2. The hydraulic rod holder 8 is used for temporarily fixing the rod in preparation work and the like, and is used in automatic feed operation and preparation work. The hydraulic rod holder 8 is used by holding the rod between the claws 8a and 8b.

A power control board 10 is provided on the side surface of the frame 1. A power supply circuit for controlling a motor for driving a hydraulic pump and the like is incorporated in the power control board 10.
Further, the power control panel 10 has a drilling depth meter 30, which will be described later.
An improved depth gauge 50 is provided. A step timer 16 is arranged on the power control board 10. This step timer 16 is an improved depth gauge 50 as will be described later.
This is for setting the stop time of the rod for each fixed distance interval set in. The preset counter 17 sets the number of necessary steps. After repeating the steps a set number of times, the feed hydraulic cylinders 3, 3 are stopped.

The operation panel 11 is an operation panel provided with buttons, switches and the like for operating the ground improvement machine. The hydraulic operation panel 12 is an operation panel provided with switches for operating the hydraulic system. The oil pump 13 is a variable displacement piston pump type oil pump, and pressurized oil is supplied to each part. The electric motor 14 is a motor for rotationally driving the oil pump 13. Four outriggers 15 are provided on the side surface of the frame 1.
The outrigger is a hydraulic cylinder, and by introducing hydraulic pressure into this hydraulic cylinder, the piston is extended,
The entire frame 1 is stably supported.

Step Detection Mechanism FIG. 3 shows a step detection mechanism for detecting the movement of the swivel head main body 2. The upper and lower sides of the rack 20 are fixed to the swivel head main body 2 via rods 21 and 21. A pinion gear 22 meshes with the rack 20. The pinion gear 22 is a rotary encoder 23.
Is connected to the rotating shaft of.

The rotary encoder 23 is housed in an encoder box 24, and the encoder box 24 is fixed to the frame 1 with bolts 25. The outside of the rack 20 is covered with bellows 26, 26,
These ends are the encoder box 24 and the bracket 2.
7 is fixed. Therefore, even if the rack 20 moves together with the swivel head main body 2, it is not exposed.
As can be understood from this structure, the swivel head body 2
When is moved, an output pulse corresponding to the movement is output from the rotary encoder 23.

Functional block of drilling depth meter and improved depth meter
FIG . 4 is a functional block diagram of the drilling depth gauge and the improved depth gauge. The output of the rotary encoder 23 is the drilling depth meter 3
0 and is input to the improved depth meter 50. The output of the rotary encoder 23 is input to one counter 31. The contents of the counter 31 are read by the central processing unit (CPU) 32. The storage unit 33 stores and holds programs and data for controlling the drilling depth meter 30 as a whole.

The display section 34 is for displaying the drilling depth, the mode number at the time of mode switching, the set value, and the like. The latch circuit 35 is a memory circuit for temporarily holding the numerical value set in the setting switch 36. The setting switch 36 is a digital switch for manually setting the drilling depth and the like (see FIG. 5). Mode key 37
Is for switching the operation mode of the drilling depth meter 30, such as an input mode, a setting mode, an output mode, and a display mode.

The D / A converter 38 is for converting the output of the drilling depth meter 30 from a digital signal to an analog signal and displaying it on an external recorder 39. The D / A converter 40 is for outputting the command from the central processing unit 32 to the relay 41. The relay 41 is for turning on and off the output of the coil current of a solenoid valve (not shown) for cutting off or switching the oil supply of the feed hydraulic cylinders 3, 3.

When the drilled depth reaches a certain level, the relay 4
1, the solenoid valve can be switched to feed, that is, the swivel head main body 2 can be stopped or the feed direction can be switched. The reset key 42 is for resetting the drilling depth meter 30, and includes the latch circuit 35 and the central processing unit 3.
All the items such as 2 are reset, and the state becomes a state in which a start or an input is possible.

The structure and function of the improved depth gauge 50 are almost the same as those of the drilling depth gauge 30. However, the output from the hole drilling depth meter 30 is different in that it is used for the function described later. The output of the rotary encoder 23 is input to the improved depth gauge 50. The output of the rotary encoder 23 is the counter 5
Input to 1. The content of the counter 51 is read by the central processing unit (CPU) 52 at regular time intervals according to a program stored in the storage unit 53. Storage unit 53
Stores and holds a program and data for controlling the entire improved depth gauge 50.

The display 54 is for displaying the drilling depth, the mode number at the time of mode switching, the set value and the like. The latch circuit 55 is a storage circuit that temporarily holds the value from the setting switch 56. Setting switch 56
Is a digital switch for manual setting to set improved depth, step distance. Mode key 5
Reference numeral 7 is for switching the operation mode of the drilled improved depth gauge 50 such as an input mode, a setting mode, an output mode, and a display mode.

The D / A converter 58 is for outputting the data of the improved depth meter 50, converting the digital signal into an analog signal, and displaying it on the external recorder 59. The reset key 60 resets the improved depth gauge 50, and all of the latch circuit 55, the central processing unit 52, and the like are reset to a ready state or an enterable state.

The D / A converter 61 is for outputting the command from the central processing unit 52 to the relay 62. The relay 62 uses the central processing unit 5 for each set step distance.
2 to 62 via the D / A converter 61. The output of the relay 62 is the preset counter 17 (see FIG. 2).
Is input to and subtracted. Preset counter 1
The number of steps required for the automatic step is input to 7 by a switch provided on the power control panel 10 in advance.

When the set number of steps is completed, the lamp 63 is turned on and the operator is informed accordingly. The valve switching solenoid 64 is a solenoid for stopping the feed of the feed hydraulic cylinders 3, 3. The output of the relay 62 stops the feed of the feed hydraulic cylinders 3, 3. This stop time is defined by the step timer 16 and set in advance.

That is, the step timer 16 (see FIG. 2) is for temporarily stopping the feeding of the swivel head 2. The step timer 16 is used when it is necessary to temporarily stop the feeding of the swivel head 2 when forming bump-like projections at a constant interval on the ground improvement column. During this stop, a bump-like projection is made on the ground improvement column.

Front Panel of Drilling Depth Meter 30 FIG. 5 is a front view showing the front panel of the drilling depth meter 30. The display 34 comprises five digits of the numerical display characters AE. At the time of measurement, the measured values are displayed on the characters A to E. When switching modes, A is the mode number
(Number), and B to E display set values.

The mode key 37 can select nine modes. For example, in the modes [1] and [2], the conversion value input mode of the relationship between the encoder pulse and the length is input, and in the mode [5], the start display is made from the hole opening of the drilled hole or the start is made from the hole bottom. The display is selected. Press the mode key 37 (first press for 2 seconds or more)
And (A ... DP4) of the mode indicator 34 is (1 → 2 → 3
→… 9 → 1 → 2 →…) is repeated. Reset key 40
Is a key for resetting the operation of the drilling depth meter 30.

When the reset key 40 is pressed, resetting is performed and the display is returned to "0". Also, if relay output is being performed, relay release is also performed at the same time. Setting switch 36a
Is a switch for inputting when there is an output of the relay, and is an input switch for setting the drilling depth. When the drilling depth is set and the reset key 40 is pressed,
The depth (in mm) is displayed on the display 34.

The setting switch 36b is a switch for inputting a set value for relay output, but is not used in this embodiment. The OUT1 indicator 34a is
This is for lighting in synchronization with the relay output of the setting switch 36a. Minus display indicator 34b
Is for lighting when the measured value is a negative value. The OUT2 indicator 34c is for lighting in synchronization with the relay output of the setting switch 36b (OUT2).

Front Panel of Improved Depth Gauge 50 Although the above description is related to the drilling depth gauge 30, the improved depth gauge 50 has the same front panel arrangement. However, the setting switch 36a of the drilling depth meter 30 indicates the drilling depth, but the improved depth meter 50 is different in that it is for inputting the step distance, that is, the stop interval distance. Others are the same, so description will be omitted.

Operation of Drilling Depth Meter 30 FIG. 6 is a flowchart showing an outline of the operation of the drilling depth meter 30. First, the depth to be drilled in the drilling depth meter 30 is set in advance in the setting switch 36a and stored in the storage unit 33. The display mode on the display 34 is selected from the distance display from the hole opening and the distance display from the hole bottom.
This selection is made by pressing the mode key 37.

When these settings are completed, the feed of the ground improvement machine is started. The swivel head 2 is driven by the feed hydraulic cylinders 3 to move the rack 20. The pinion gear 22 is rotated according to the movement of the rack 20, and an output pulse is output from the rotary encoder 23. This output signal is counted by the counter 31 and added when starting from the hole opening. The added value is calculated by the central processing unit 32 and displayed as a feed amount, that is, a millimeter (mm).

This display and calculation are performed at each predetermined sampling time. When the set value, that is, the depth for drilling is reached, the relay 41 is operated to operate the electromagnetic switching valve of the feed hydraulic cylinder to stop the feed. After the drilling, the same procedure is performed when pulling up from the bottom of the hole, but in this case, the depth for drilling is set in advance or the display during excavation is left as it is, and the mode key 37 is switched to the subtraction mode. Therefore, the display 34
Is gradually subtracted and the drilling depth position is displayed.

FIG. 7 is a flow chart showing the outline of the operation of the improved depth gauge. Ground improvement is usually performed from the bottom of the drilled hole. Therefore, the drilled depth, the step distance, and the number of steps are input and set in the improved depth meter 50. The feed hydraulic cylinders 3, 3 are driven, and the output pulse from the encoder 23 is input to the counter 51 in the same manner as the hole drilling depth meter 30, and the position currently being improved is displayed on the display 54 as described above. It

When the rod is positioned at the set step distance position, it is output to the relay 62 and the valve switching valve solenoid 64 is switched to stop the feeding. This stop time stops the time feed set in the step timer 16. When this time has elapsed, the hydraulic feed is driven again.
This feed is stopped sequentially, and the ground is improved up to the set position.

[0041]

Other Embodiments The hole-drilling depth gauge 30 of the above-mentioned embodiment is not automatically linked with the feed of the rod. However, the stop of the rod feeding may be output to the relay, and the hydraulic valve may be switched by the relay output to automatically stop the feeding.

[0042]

As described above in detail, since the drilling depth meter of the present invention can freely select the depth display from the subtraction display or the addition display, it is less likely that the operator makes an operation error. Also,
Since the improved depth gauge and feed stop are linked, ground improvement work can be automated.

[Brief description of drawings]

FIG. 1 is a front view of a ground improvement machine.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view showing meshing between a rotary encoder and a rack.

FIG. 4 is a functional block diagram showing an outline of a drilling depth gauge and an improved depth gauge.

FIG. 5 is a front view showing details of a front panel of the hole drilling depth meter.

FIG. 6 is a flowchart showing an outline of the operation of the hole drilling depth meter.

FIG. 7 is a flowchart showing an outline of the operation of the improved depth gauge.

[Explanation of symbols]

 1 ... Frame 2 ... Swivel head body 3 ... Feed hydraulic cylinder 4 ... Piston rod 5 ... Flange 6 ... Hydraulic chuck body 7 ... Hydraulic motor 8 ... Hydraulic rod holder 8a, 8b ... Claw 10 ... Power control panel 11 ... Operation panel 12 ... Hydraulic operation panel 13 ... Oil pump 14 ... Electric motor 15 ... Outrigger 20 ... Rack 23 ... Rotary encoder 24 ... Encoder box 26, 26 ... Bellows

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-255489 (JP, A) JP-A-57-77792 (JP, A) Actually developed JP-A-60-111937 (JP, U)

Claims (2)

(57) [Claims] 1. A rotary encoder (23) for detecting vertical movement of an excavating rod of a ground improvement machine, a counter (31) for receiving an output pulse of the rotary encoder (23), and a drilling hole to be drilled. Storage means (33) for storing the depth, a setting switch (36) for setting the drilling depth in the storage means (33), and a display for displaying at least the drilling depth Bowl (3
4) and the drilling depth displayed on the display (34),
Select the distance display from the hole mouth or hole bottom to be cut
And a central processing unit (32) for calculating the movement distance of the excavating rod by displaying the data of the counter (31) and displaying it on the display (34). A drilling depth meter for a ground improvement machine . 2. A rotary encoder (23) for detecting vertical feed of a rod of a ground improvement machine, a counter (51) for receiving an output pulse of the rotary encoder (23), and a modified depth to be improved is stored. And a setting switch (56) for setting the improved depth and the step distance which is the feed interval of the rod in the storage means (53), and at least improve the improved depth . Or the bottom of the hole
An indicator (54) for displaying the distance between them, and an output means (60, 61) for outputting a stop signal for stopping the feed of the ground improvement machine for a predetermined time for each set step distance. An improved depth gauge for a ground improvement machine, comprising: a central processing unit (52) for calculating data of the counter (51) to calculate a moving distance of the rod and displaying the moving distance on the display (54).