JP3181271B2 - All casing excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-casing excavator applied to excavation of a shaft or construction of a foundation shaft.

[0002]

2. Description of the Related Art An all-casing excavator is used, for example, when excavating a shaft, and clamps a casing tube and pushes the casing tube into the ground while turning the casing tube, thereby forming a cutter bit at a lower end. By cutting the ground. Then, the crane is operated to discharge earth and sand from the casing tube by the grab bucket to form a shaft.

FIG. 4 schematically shows a conventional self-propelled all-casing excavator, and FIG. 5 schematically shows a conventional stationary all-casing excavator.

[0004] As shown in FIG. 4, a self-propelled all-casing excavator 101 is equipped with a setting machine 103 which can clamp, turn, and push a casing tube 102. In addition, the self-propelled all-casing excavator 101 is provided with a crawler-type traveling device 104 at a lower portion, so that the self-propelled all-casing excavator 101 can perform self-propelled movement, alignment of a pit, and getting on and off a trailer during transportation. I have.

[0005] As shown in Fig. 5, a stationary all-casing excavator 201 is equipped with a setting machine 203 which can turn and push a casing tube 202 by clamping it. And this stationary all casing excavator 201
In the construction, the movement in the construction site, the alignment of the pit, and the loading / unloading of the trailer during transportation are performed by a large crane (not shown).

[0006]

When a shaft is excavated by an all-casing excavator, the shaft is generally excavated in a vertical direction. Therefore, when the ground has irregularities or is inclined, it is necessary to maintain the all-casing excavator in a horizontal state.

In the conventional self-propelled all-casing excavator 101 described above, a self-propelled machine is installed with a driving machine 103 for pushing a casing tube 102 into the ground.
It is difficult to maintain the self-propelled all-casing excavator 101 in a horizontal state. Further, in the above-mentioned conventional stationary all-casing excavator, it is conceivable to mount, for example, a hydraulic cylinder for adjusting a horizontal state outside the frame of the driving machine 203, but the apparatus becomes large. .

An object of the present invention is to solve such a problem, and an object of the present invention is to provide an all-casing excavator which is reduced in size and weight and easily maintained in a horizontal state.

[0009]

According to a first aspect of the present invention, there is provided an all-casing excavator in which an outer periphery of a casing tube is gripped via a drive unit case main body, and the casing tube is connected to an axis line. In an all-casing excavator that excavates by excavating earth and sand in the casing tube while pushing it into the ground while turning it around the center, an elevating cylinder that supports the drive unit case main body so as to be able to move up and down with respect to the base frame is provided. And a level adjusting cylinder is provided below the lifting cylinder.

Further, in the all-casing excavator according to the second aspect of the present invention, the elevating cylinder and the level adjusting cylinder are connected in series.

Further, in the all-casing excavator according to the third aspect of the present invention, the elevating cylinder and the level adjusting cylinder are concealed in a frame frame provided between the drive unit case main body and the base frame. I have.

Further, in the all-casing excavator according to the present invention, a clamp body for gripping an outer periphery of the casing tube and a turning device for turning the casing tube are provided on the drive case body. I have.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic front view of an all-casing excavator according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a schematic front view showing an operation state of the all-casing excavator.

As shown in FIG. 1, in the all-casing excavator according to the present embodiment, a clamp body 14 for clamping a casing tube 13 by clamping a casing tube 13 by a clamping cylinder 12 is provided on an excavator body 11. And
Drive unit case body 1 provided on top of excavator body 11
A turning device (not shown) for turning the casing tube 13 clamped by the turning motor 16 is provided in 5.

The drive unit case body 15 includes the base frame 1.
7 can be moved up and down by a hydraulic cylinder 18 for elevating and lowering, and a horizontal state can be maintained by a hydraulic cylinder 19 for level adjustment. An auxiliary clamp body 20 is provided in the base frame 17.

As shown in FIGS. 1 and 2, the excavator body 11 (base frame 17) described above is installed and supported on a gantry 21, and the gantry 21 is mounted on four sides. The supporting frame 22 is supported by a plurality of lifting cylinders 23 so as to be able to move up and down. And
Each support frame 22 is movable by a slide cylinder 25 in two orthogonal directions which are horizontal with respect to each slide frame 24 placed inside.

In order to excavate a shaft using the all-casing excavator of this embodiment, the tightening cylinder 12 is operated and the casing tube 13 is clamped by the clamp body 14.
In this state, the turning motor 16 is operated to turn the casing tube 12 by the turning device, and at the same time, the casing tube 12 is pushed into the ground by the hydraulic cylinder 18 and the ground is cut by the cutter bit at the lower end. . At this time, the crane (not shown) is operated to discharge the earth and sand in the casing tube 12 by the grab bucket to form a shaft.

In order to move the all-casing excavator after the excavation work is completed, the excavator main body 11 is raised with respect to the support frame 22 by each lifting cylinder 23. In this state, for example, the support frame 22 can be moved leftward with respect to the slide frame 24 by extending the upper and lower slide cylinders 25 in FIG. Then, the excavator main body 11 is lowered by returning the lift cylinders 23, and in this state, the slide frame 24 can be moved leftward by contracting the upper and lower slide cylinders 25 in FIG.

Therefore, the excavator main body 11 can be moved in the same direction by operating the lifting cylinder 23 and the slide cylinder 25 to move the support frame 22 again.

In order to move the excavator body 11 rightward in FIG. 2, the support frame 22 is slid by contracting the upper and lower slide cylinders 25 in FIG. Frame 24
To the right. Further, the vertical movement of the excavator body 11 in FIG. 2 can be performed by extending or contracting the left and right slide cylinders 25 in FIG. 2 with the excavator body 11 raised.

Further, in the all-casing excavator of the present embodiment, since the drive unit case main body 15 can be maintained in a horizontal state with respect to the base frame 17 by the level adjusting hydraulic cylinder 19, there are irregularities on the ground, Even if it is inclined, the shaft can be excavated in the vertical direction. Then, this level adjusting hydraulic cylinder 1
9 is connected in series with the lifting hydraulic cylinder 18 and is concealed in a frame provided between the drive unit case main body 15 and the base frame 17, so that the size of the apparatus is not increased. Further, in the all-casing excavator of the present embodiment, the upper, lower, left, and right parts are divided in FIG. 2, so that the structure is simplified, and the assembling and the like are facilitated.

[0023]

As described above in detail in the embodiment, according to the all-casing excavator according to the first aspect of the present invention, the elevating cylinder for supporting the drive unit case main body so as to be able to move up and down with respect to the base frame is provided. A level adjustment cylinder is provided below the lift cylinder, so that the drive case body can be easily maintained in a horizontal state by the level adjustment cylinder, so that the shaft can be excavated in an appropriate direction even if the ground is uneven or inclined. In addition, by providing the level adjusting cylinder below the lifting cylinder, it is possible to reduce the size and weight.

Further, according to the all-casing excavator of the second aspect of the present invention, since the lifting cylinder and the level adjusting cylinder are connected in series, the driving reaction force of the lifting cylinder and the driving reaction force of the level adjusting cylinder are mutually coordinated. In this case, the driving reaction force does not act on the base frame, and the size can be reduced.

According to the all-casing excavator according to the third aspect of the present invention, the lifting cylinder and the level adjustment cylinder are concealed in the frame frame provided between the drive unit case main body and the base frame. Excavated earth and sand do not adhere to the adjusting cylinder, and proper operation is possible, thereby improving reliability.

According to the all-casing excavator according to the fourth aspect of the present invention, the clamp body for gripping the outer periphery of the casing tube and the revolving device for revolving the casing tube are provided in the drive case main body. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an all-casing excavator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a schematic front view illustrating an operation state of the all-casing excavator.

FIG. 4 is a schematic view of a conventional self-propelled all-casing excavator.

FIG. 5 is a schematic view of a conventional stationary all-casing excavator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Excavator main body 13 Casing tube 14 Clamp body 17 Base frame 18 Elevating hydraulic cylinder 19 Level adjusting hydraulic cylinder 21 Mount 22 Support frame 23 Elevating cylinder 24 Slide frame 25 Slide cylinder

Continuation of the front page (56) References JP-A-2-13687 (JP, A) JP-A-2-85495 (JP, A) JP-A-2-104894 (JP, A) JP-A-2-157388 (JP) , A) (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 7/20 E21D 1/03

Claims (4)

(57) [Claims] In a state where the outer periphery of a casing tube is gripped via a drive unit case main body, the casing tube is pushed into the ground while being swung about an axis,
An all-casing excavator that discharges earth and sand in the casing tube to perform excavation work, wherein an elevating cylinder that supports the driving unit case body so as to be able to move up and down with respect to a base frame is provided, and a level adjusting cylinder is provided below the elevating cylinder. An all-casing excavator comprising: 2. The all-casing excavator according to claim 1, wherein the lifting cylinder and the level adjusting cylinder are connected in series. 3. The all-casing excavator according to claim 1, wherein the elevating cylinder and the level adjusting cylinder are concealed in a frame provided between the drive unit case main body and the base frame. All casing excavator. 4. The all-casing excavator according to claim 1, wherein the drive unit case main body is provided with a clamp body for gripping an outer periphery of the casing tube and a turning device for turning the casing tube. All casing excavator.