JPH06257364A - All casing drilling machine - Google Patents

Abstract

PURPOSE:To attain small size and light weight of a drilling machine and enable it to perform large bore drilling and drilling at narrow jobsite. CONSTITUTION:In an all casing drilling machine to perform a drilling work by pressing a casing tube 12 into the earth while rotating it centering around the axis line and discharging the earth and sand in the casing tube 12, a drilling machine main body 11 is elevatably supported against a supporting frame 22 by means of an elevatable cylinder 23. The supporting frame 22 is supported against a slide frame 24 movably in the horizontal direction by means of a slide cylinder 25.

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 vertical shaft excavation or foundation pit construction.

[0002]

2. Description of the Related Art An all-casing excavator is used, for example, when excavating a vertical shaft. It clamps a casing tube and pushes it into the ground while rotating the casing tube to insert a cutter bit at the lower end. The ground is cut by. Then, the crane is operated to discharge the earth and sand in the casing tube with the grab bucket to form a vertical shaft.

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

As shown in FIG. 4, a self-propelled all-casing excavator 101 is equipped with a driving machine 103 that clamps a casing tube 102 and can swivel and push. Further, the self-propelled all-casing excavator 101 is provided with a crawler-type traveling device 104 at the lower part, so that it is possible to perform self-propelled movement within the construction site, alignment of the mine, and getting on and off the trailer during transportation. There is.

As shown in FIG. 5, a stationary all-casing excavator 201 is equipped with a placing machine 203 that clamps a casing tube 202 and can swivel and push. And this stationary all casing excavator 201
A large crane (not shown) is used to move inside the construction site, align the mine, and load and unload it on the trailer during transportation.

[0006]

In the conventional self-propelled all-casing excavator described above, the weight and size of the conventional self-propelled all-casing excavator are limited when mounted on a trailer during transportation, and a large excavator can be transported. could not. Further, in the above-mentioned conventional stationary all-casing excavator, there is a limit to the size of the crane that can be used at the construction site. Therefore, conventionally, only excavation was performed using a casing tube having an excavation diameter of about 2 m.

In recent years, large-diameter vertical shaft excavation (excavation diameter 3-8 m)
There is an increasing demand for a compact excavator that can be used in large-diameter foundation pit construction (excavation diameter of 3 to 5 m) or in narrow construction sites. However, at present, there is no excavator that meets this demand, so excavation by manpower is adopted for large-diameter excavation, and methods such as increasing the number of pits by small machines are used at narrow construction sites. However, these methods have poor work efficiency, require a long construction period, increase costs, and have a problem in work safety.

The present invention has been made to solve the above problems, and an object thereof is to provide an all-casing excavator that is small in size and light in weight and is capable of large-diameter excavation and excavation at narrow sites. .

[0009]

The all-casing excavator of the present invention for achieving the above object pushes the casing tube into the ground while rotating the casing tube around its axis and discharges the earth and sand in the casing tube. In an all-casing excavator that performs excavation work, the excavator main body is supported by a lift cylinder so as to be able to move up and down, and the support frame is supported by a slide cylinder so as to be movable in the horizontal direction. It is characterized by.

[0010]

In order to move the all-casing excavator, first the elevator cylinder raises the excavator body relative to the support frame, and then, in this state, the slide cylinder moves the support frame horizontally with respect to the slide frame. By doing so, the excavator body moves in the same direction.

[0011]

Embodiments of the present invention will now be described 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 line II-II of FIG. 1, and FIG. 3 is a schematic front view showing an operating state of the all-casing excavator.

As shown in FIG. 1, in the all-casing excavator of this embodiment, the excavator body 11 is provided with a clamp body 14 for clamping the casing tube 13 by a clamping cylinder 12. A turning device (not shown) for turning the casing tube 13 clamped by the turning motor 16 is provided in the drive unit case body 15 provided on the upper part of the shaving machine body 11.

The drive case main body 15 is the base frame 1
7, a hydraulic cylinder 18 can move up and down, and a level adjusting hydraulic cylinder 19 can maintain a horizontal state. An auxiliary clamp body 20 is provided in the base frame 17.

Further, as shown in FIGS. 1 and 2, the excavator body 11 (base frame 17) described above is installed and supported on a pedestal 21, and the pedestal 21 is placed on four sides. A plurality of lift cylinders 23 are supported to lift the lifted support frame 22. And
Each support frame 22 is movable in two orthogonal horizontal directions by a slide cylinder 25 with respect to each slide frame 24 mounted therein.

Thus, in order to perform vertical shaft excavation using the all-casing excavator of this embodiment, the tightening cylinder 12 is operated to clamp the casing tube 13 by the clamp body 14, and in this state, the turning motor 16 is operated. The casing tube 12 is swung by the swivel device while being actuated, 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, a crane (not shown) is operated to discharge the earth and sand in the casing tube 12 with a grab bucket to form a vertical shaft.

In order to move the all-casing excavator after the excavation work is completed, the excavator main body 11 is lifted with respect to the support frame 22 by the lifting cylinders 23. In this state, for example, by extending the upper and lower slide cylinders 25 in FIG. 2, the support frame 22 can be moved leftward with respect to the slide frame 24. Then, this time, the lift cylinders 23 are returned to lower the excavator body 11, and in this state, the slide frames 24 can be moved leftward by contracting the upper and lower slide cylinders 25 in FIG.

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

In order to move the excavator body 11 to the right in FIG. 2, the support frame 22 is slid by contracting the upper and lower slide cylinders 25 in FIG. 2 while the excavator body 11 is raised. Frame 24
Can be moved to the right with respect to. Further, the excavator body 11 can be moved up and down in FIG. 2 by extending or contracting the left and right slide cylinders 25 in FIG. 2 while the excavator body 11 is raised.

Further, in the all-casing excavator of this embodiment, the upper and lower parts and the left and right parts in FIG. 2 are divided, so that the structure is simplified and the assembling is easy.

[0021]

As described above in detail with reference to the embodiments, according to the all-casing excavator of the present invention, the excavator main body is movably supported by the elevating cylinder with respect to the support frame, and the support frame is supported. Since it is supported horizontally with respect to the slide frame by the slide cylinder, it is possible to reduce the size and weight and to easily move the excavator body to enable large-diameter excavation and excavation at narrow sites. Therefore, cost reduction and safety improvement can be achieved.

[Brief description of 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 in FIG.

FIG. 3 is a schematic front view showing an operating 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]

 11 Excavator Main House 13 Casing Tube 14 Clamping Body 17 Base Frame 18 Hydraulic Cylinder 21 Stand 22 Support Frame 23 Lifting Cylinder 24 Slide Frame 25 Slide Cylinder

Claims (1)

[Claims] 1. In an all-casing excavator that pushes a casing tube into the ground while rotating it about its axis and discharges the earth and sand in the casing tube for excavation work, the excavator body is raised and lowered with respect to a support frame. An all-casing excavator, which is supported by a cylinder so as to be able to move up and down, and the supporting frame is supported by a slide cylinder so as to be movable in a horizontal direction with respect to a slide frame.