JPH07252834A - Tubing device - Google Patents

Abstract

PURPOSE:To provide a tubing device easy to make horizontal adjustment. CONSTITUTION:This tubing device is provided with horizontal jacks arranged at four corners of a base frame 56 and a tilt sensor 76 arranged on a lift frame and detecting the tilt angles in the longitudinal direction (X direction) and lateral direction (Y direction). When the tilt angles detected by the tilt sensor 76 are the specified values or above, the heights of the horizontal jacks are controlled so that the tilt angles become the specified values or below, and the inclination of the lift frame 12 is adjusted horizontal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubing device for pushing and pulling a casing tube used for foundation work such as construction and civil engineering.

[0002]

2. Description of the Related Art Conventionally, pushing a casing tube
As a tubing device for pulling out, for example, Japanese Patent Laid-Open No.
As described in JP-A-3-251520, an insertion hole having a tapered surface is formed in a rotating body rotatably supported by an elevating frame, and a casing tube is inserted into the insertion hole. Then, a wedge is inserted between the tapered surface and the casing tube to grip the outer periphery of the casing tube and rotate the rotating body to rotate the casing tube. Also, the lifting frame and the base frame are connected by a cylinder,
Drive the cylinder to move the lifting frame up and down,
Push in and pull out the casing tube. Further, there is proposed a structure in which horizontal jacks are attached to the four corners of the outer edge of the base frame, and the elevation frame can be adjusted horizontally by adjusting the height of the horizontal jacks.

[0003]

In such a conventional one, a hydraulic cylinder is built in as a horizontal jack and the height is adjusted by operating a manual switching valve, or the height is adjusted by rotating a screw. Etc. are used. Then, the operator determines the inclination of the elevating frame by using an inclinometer such as a spirit level placed on the elevating frame, and adjusts the heights of the horizontal jacks provided at the four corners of the base frame to adjust the inclination of the elevating frame. Was.

However, in order to construct a pile with high accuracy, it is necessary to adjust the tilt of the elevating frame during excavation, and the operator always monitors the inclinometer during excavation, and When tilted, the height of the horizontal jack had to be adjusted so that the lifting frame would be horizontal. In addition, since the operator operates other mechanisms such as the rotating mechanism of the casing tube at a slightly separated place during excavation, the operator must move to the horizontal jack when adjusting the level. There wasn't. Therefore,
There is a problem that the burden on the operator is heavy, it is difficult to always check the horizontal position, and the adjustment may be delayed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tubing device which can easily adjust the horizontal level, with the object of solving the above problems.

[0006]

In order to achieve such an object, the present invention has the following constitution as means for solving the problem. That is, as shown in FIG. 1, an elevating frame M4 equipped with a chuck mechanism M2 for gripping the outer periphery of a casing tube M1 and having a rotating mechanism M3 for rotating the chuck mechanism M2 mounted thereon can be moved up and down on a base frame M5. In a tubing apparatus including a lifting mechanism M6 that supports and lifts the lifting frame M4 by a cylinder to push and pull the casing tube M1 in a horizontal direction, the tilt of the lifting frame M4 can be adjusted according to an input signal. An adjusting mechanism M7, an inclination sensor M8 for detecting the inclination angle of the casing tube M1, and the horizontal adjusting mechanism M7 based on the inclination angle detected by the inclination sensor M8 to adjust the inclination of the elevating frame M4. And a horizontal control means M9 for controlling the tubing device. A.

[0007]

In the tubing apparatus having the above structure, the inclination sensor M8 detects the inclination angle of the casing tube M1,
The horizontal control means M9 controls the horizontal adjustment mechanism M7 based on the inclination angle detected by the inclination sensor M8, and the horizontal adjustment mechanism M7 adjusts the inclination of the elevating frame M4 horizontally according to an input signal. Further, the chuck mechanism M2 grips the outer periphery of the casing tube M1, the rotation mechanism M3 rotates the chuck mechanism M2, and the lifting mechanism M6 drives the cylinder to move the lifting frame M4 up and down to push and pull the casing tube M1. To do.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 3 and 4, reference numeral 1 denotes a casing tube, and a plurality of wedge-shaped chuck members 2 are arranged on the outer periphery of the casing tube 1 at equal intervals. Are suspended via a link 6 that is pivotally supported. The rotating ring 4 is rotatably supported by the upper frame 8 via a bearing 10, and the upper frame 8 and the elevating frame 12 are connected by a plurality of chuck cylinders 14.

An insertion hole 16 into which the casing tube 1 can be inserted in the elevating frame 12 together with the chuck member 2 on the outer periphery.
A rotating body 18 in which is formed is rotatably supported via a bearing 20. A taper surface 24 corresponding to the taper surface 22 formed on the back surface of the chuck member 2 is formed in the insertion hole 16. In this embodiment, the chuck member 2, the rotary ring 4, the link 6, the upper frame 8, the bearing 10, the chuck cylinder 14, and the rotary body 1 are used.
8 constitutes a chuck mechanism 26.

A gear portion 28 is formed on the outer circumference of the rotating body 18, and an idle gear 34 rotatably supported by a support shaft 30 attached to the elevating frame 12 via a bearing 32 is formed on the gear portion 28. Are meshed. A small gear 38 attached to a hydraulic motor 36 fixed to the lifting frame 12 is meshed with the idle gear 34.

In this embodiment, a plurality of hydraulic motors 36 are used.
And a small gear 38 and an idle gear 34, respectively, for the rotating body 18, the bearing 2
0, the idle gear 34, the pinion gear 38, and the hydraulic motor 36 constitute a rotation mechanism 40.

Further, as shown in FIGS. 2 and 3, first guide cylinders 42 are provided on the elevating frame 12 in parallel with the casing tube 1 and at the four corners of the elevating frame 12 in this embodiment.
The flange portion 44, which is arranged so as to penetrate the elevating frame 12 and is formed on the first guide tube 42, has the elevating frame 1
It is fixed to the lower surface of 2 by a bolt (not shown). The first guide tube 42 protruding above the lifting frame 12
A cylindrical guide member 45 attached to the lower surface of the upper frame 8 is slidably fitted to the outer periphery of the upper frame 8 and the upper frame 8 and the elevating frame 12 are supported so as to be vertically movable relative to each other. .

Then, on the inner circumference of each first guide cylinder 42,
The outer periphery of the second guide cylinder 46 is slidably fitted in each, and the flange portion 48 is provided at the lower end of the second guide cylinder 46.
Are formed. The head side of the cylinder 50 is fixed to the upper end of each first guide cylinder 42, and each second guide
The rod 52 of the cylinder 50 is attached to the pin 5 on the guide cylinder 46.
It is connected through 4. It is also possible to slidably fit the inner circumference of the second guide cylinder 46 to the outer circumference of the first guide cylinder 42.

On the other hand, a mounting seat 58 is formed on the base frame 56 so as to correspond to the second guide cylinder 46. The flange portion 48 of the second guide cylinder 46 is fixed to the mounting seat 58 with a bolt or the like not shown, and the second guide cylinder 46 is fixed.
Are erected on the base frame 56. In this embodiment, the first guide cylinder 42, the second guide cylinder 46, and the cylinder 50 constitute an elevating mechanism 60.

Through holes 62, 64 and 66 are formed in the flange portion 48 and the mounting seat 58 coaxially with the cylinder 50, respectively, and are inserted into the through holes 62, 64 and 66 on the back side of the base frame 56. The flange portion 70 of the horizontal jack 68 is attached via a pair of connecting members 72. The horizontal jack 68 has a structure in which the leg member 74 can be axially projected by the supplied fluid.

The horizontal jack 68 is shown in FIG.
The horizontal jacks 68 are provided at the four corners of the base frame 56, respectively, as shown in FIG. Each horizontal jack 68a
~ 68d, as shown in Fig. 5, each switching valve 117-12.
0, and by switching the switching valves 117 to 120, fluid can be supplied to and discharged from a fluid pressure source (not shown) so that the leg member 74 can be projected or retracted. In this embodiment, the horizontal jacks 68a to 68a are used.
A horizontal adjustment mechanism M7 is constituted by the switching valves 117 to 120d.

A tilt sensor 76 is mounted on the elevating frame 12, and the tilt sensor 76 is arranged in the front-rear direction (X direction in FIG. 3) and the left-right direction (Y direction in FIG. 3) of the elevating frame 12. The inclination angle of is detected and output as an electric signal. The tilt sensor 76 is connected to the electronic control circuit 100. The tilt sensor 76
Can also be carried out by placing it on the elevating frame 12.

The electronic control circuit 100 is a well-known CPU 10
2. An input / output circuit configured as a logical operation circuit mainly including the ROM 104, the RAM 106, and the like, which performs input / output with the outside, here, an input circuit 108 and an output circuit 110 are connected to each other via a common bus 112.

The CPU 102 inputs the input signals from the tilt sensor 76 via the input circuit 108, and the CPU 102 controls the output circuit 110 based on these signals and the data in the ROM 104 and the RAM 106 and the control program stored in advance. A signal is output to each switching valve 117-120, the front-back direction display meter 122, and the left-right direction display meter 124 via it.

Next, the operation of the tubing apparatus of this embodiment described above and the automatic horizontal control process performed in the electronic control circuit 100 will be described with reference to the flowchart of FIG. First, when the tubing device is installed at the excavation position, an automatic horizontal control process is executed to adjust the horizontality of the elevating frame 12, and the detection signal from the tilt sensor 76 is input via the input circuit 108. The tilt angle in the front-back direction (X direction) is measured (step S10).
0). Next, it is determined whether the measured tilt angle is equal to or greater than a predetermined designated value (step S110).

When the tilt angle is greater than or equal to a predetermined value, the output circuit 11 controls the tilt angle in the front-rear direction to be less than or equal to the specified value.
An excitation signal is output to each of the switching valves 117 to 120 via 0, and the tilt angle of the elevating frame 12 is controlled to be equal to or less than a specified value by supplying / discharging fluid to / from the horizontal jacks 68a to 68d. For example, if the front side is low and the back side is high,
The switching valves 117 and 120 are switched in the direction in which the leg members 74 of the two front side horizontal jacks 68a and 68d are projected, and the leg members 7 of the two rear side horizontal jacks 68b and 68c.
The switching valves 118 and 119 are switched in the direction in which 4 is retracted.

As a result, the front side is adjusted to a high level and
The rear side is adjusted to be low, and the fluid is supplied to and discharged from the horizontal jacks 68a to 68d until the inclination of the elevating frame 12 becomes less than or equal to the specified value.
7 to 120 are switched to stop the fluid supply / discharge with the horizontal jacks 68a to 68d (step S120).

When the adjustment in the front-back direction is completed, or
If it is determined by the process of step S110 that the value is less than or equal to the specified value, then the tilt angle in the left-right direction (Y direction) is measured based on the signal from the tilt sensor 76 (step S1).
30). Then, it is determined whether or not this tilt angle is equal to or greater than a specified value (step S140).

When it is equal to or larger than the specified value, an exciting signal is output to each of the switching valves 117 to 120 via the output circuit 110 so that the inclination angle in the left-right direction becomes equal to or smaller than the specified value, and the horizontal jacks 68a to 68d are connected. The tilt angle of the elevating frame 12 is controlled to be equal to or less than the specified value by supplying and discharging the fluid.
For example, when the right side is low and the left side is high, the changeover valves 117 and 118 are switched in a direction in which the leg members 74 of the two right side horizontal jacks 68a and 68b are projected, and the leg members of the two left side horizontal jacks 68c and 68d. The switching valves 119 and 120 are switched in the direction for retracting 74.

As a result, the right side is adjusted higher and
By adjusting the left side low, the fluid is supplied to and discharged from the horizontal jacks 68a to 68d until the inclination of the elevating frame 12 becomes equal to or less than the specified value, and when it becomes equal to or less than the specified value, the switching valve 11
7 to 120 are switched to stop the fluid supply / discharge with the horizontal jacks 68a to 68d (step S150).

In this way, when the leveling of the elevating frame 12 is adjusted before excavation, the casing tube 1 is then inserted and the chuck cylinder 14 is driven. As a result, the guide member 45 slides along the first guide cylinder 42, the upper frame 8 is pulled down, and the bearing 10,
The chuck member 2 is attached to the outer circumference of the casing tube 1 and the tapered surface 24 of the rotating body 18 via the rotating ring 4 and the link 6.
Is inserted between and. The taper surface 22 of the chuck member 2 slides along the taper surface 24, and the plurality of chuck members 2
Grips the outer circumference of the casing tube 1.

Next, the hydraulic motor 36 is driven to rotate,
The rotating body 18 is rotated via the small gear 38, the idle gear 34, and the gear portion 28, and the chuck mechanism 2 together with the rotating body 18 is rotated.
The casing tube 1 gripped by 6 is rotated. Further, the cylinder 50 is driven toward the contraction side, the first guide cylinder 42 slides on the outer periphery of the second guide cylinder 46, and the first guide cylinder 42 slides.
The elevating frame 12 is lowered together with the guide cylinder 42. As a result, the casing tube 1 is pushed into the ground while rotating, and excavation is performed by an unillustrated excavation bit at the tip of the casing tube 1.

When the entire stroke of the cylinder 50 is driven, the rotation of the hydraulic motor 36 is once stopped and the chuck cylinder 14 is driven to move the chuck member through the upper frame 8, the bearing 10, the rotating ring 4 and the link 6. Two
Is lifted and the grip of the casing tube 1 is released.

Then, the cylinder 50 is driven toward the extension side, and the first guide cylinder 42 slides on the outer periphery of the second guide cylinder 46 to raise the elevating frame 12. Then, the above-described operation is repeated, the outer periphery of the casing tube 1 is gripped by the chuck mechanism 26, the rotating frame 18 is rotated, and the elevating frame 12 is lowered to push the casing tube 1 in. Repeat this operation,
Excavation with the casing tube 1 is performed. Moreover, the casing tube 1 can be excavated deeper by adding more.

Although the excavation is performed in this manner, the automatic horizontal control process is repeatedly executed during the excavation, and the inclination angle in the front-rear direction detected by the inclination sensor 76 is equal to or more than the specified value as described above. (Step S100,
(S110), the excitation signal is output to the switching valves 117 to 120, the fluid is supplied to and discharged from the horizontal jacks 68a to 68d to adjust the height, and the elevating frame 12 is adjusted to be horizontal in the front-rear direction ( Step S120).

Similarly, in the left-right direction, when the tilt angle in the left-right direction detected by the tilt sensor 76 exceeds a specified value (steps S130, S140), the switching valve 1
The excitation signal is output to 17 to 120, and the horizontal jack 6
The height is adjusted by supplying / discharging fluid from 8a to 68d and adjusting the elevation frame 12 to be horizontal in the left-right direction (step S150).

Further, the tilt angle detected by the tilt sensor 76 is passed through the output circuit 110 to the front-back direction display meter 12
2, and is output to the horizontal direction display meter 124, and the tilt angle at that time is sequentially displayed. In this way, since the elevating frame 12 is automatically adjusted to be horizontal even during excavation, the operator monitors the inclination angle of the elevating frame 12 during excavation and operates the horizontal jacks 68a to 68d. It is not necessary to reduce the burden on the operator, and when the inclination angle is equal to or greater than the specified value, the elevating frame 12 is automatically adjusted to be equal to or less than the specified value. It is possible to avoid delaying adjustment.

When the excavation is completed, this time, the cylinder 50 is driven toward the extension side while the outer periphery of the casing tube 1 is held by the chuck mechanism 26, and the lifting frame 1 is moved.
Raise 2. As a result, when the casing tube 1 is pulled out from the ground and the entire stroke of the cylinder 50 is driven, the gripping by the chuck mechanism 26 is released, and the cylinder 50 is driven to the contracted side to move up and down the frame 12.
To lower.

Then, again, the outer periphery of the casing tube 1 is gripped by the chuck mechanism 26, the elevating frame 12 is raised by the cylinder 50, and the casing tube 1 is pulled out. By repeating this operation, the casing tube 1 is pulled out from the ground.

In this embodiment, execution of the automatic horizontal control process works as the horizontal control means M9. The present invention is not limited to the embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

[0036]

As described in detail above, in the tubing apparatus of the present invention, the elevating frame is automatically adjusted to be horizontal even during excavation, so that the operator can adjust the inclination angle of the elevating frame during excavation. It is not necessary to monitor and adjust the horizontal level, which reduces the burden on the operator and automatically adjusts the elevating frame horizontally so that it falls below the specified value when the tilt angle exceeds the specified value. Therefore, it is possible to avoid delaying the horizontal adjustment of the lifting frame.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a basic configuration of a tubing device of the present invention.

FIG. 2 is an enlarged cross-sectional view of an elevating mechanism and a horizontal jack of a tubing apparatus as an embodiment of the present invention.

FIG. 3 is a schematic perspective view of a tubing apparatus of this embodiment.

FIG. 4 is an enlarged cross-sectional view of a chuck mechanism and a rotation mechanism of this embodiment.

FIG. 5 is a block diagram showing a configuration of an electric system of this embodiment.

FIG. 6 is a flowchart showing an example of automatic horizontal control processing performed in the electronic control circuit of the present embodiment.

FIG. 7 is a layout view showing the layout of the horizontal jacks of this embodiment.

[Explanation of symbols]

M1, 1 ... Casing tube M2, 26 ...
Chuck mechanism M3, 40 ... Rotation mechanism M4, 12 ...
Lifting frame M5, 56 ... Base frame M6, 60 ...
Lifting mechanism M7 ... Horizontal adjustment mechanism M8, 76 ...
Inclination sensor M9 ... Horizontal control means 14 ... Chuck cylinder 18 ... Rotating body 50 ... Cylinder 100 ... Electronic control circuit

Claims (1)

[Claims] 1. A lifting / lowering frame having a chuck mechanism for gripping an outer periphery of a casing tube and having a rotating mechanism for rotating the chuck mechanism mounted thereon is vertically movably supported by a base frame, and the lifting / lowering frame is a cylinder. In a tubing device having an elevating mechanism that pushes and pulls the casing tube up and down by a horizontal adjusting mechanism that can adjust the inclination of the elevating frame according to an input signal, and detects the inclination angle of the casing tube. A tubing apparatus comprising: a tilt sensor; and a horizontal control unit that controls the horizontal adjustment mechanism based on a tilt angle detected by the tilt sensor to adjust the tilt of the elevating frame.