JP2001234689A - Drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drilling device capable of drilling at such a deep place as a bottom part of a vertical shaft. SOLUTION: This drilling device is composed of an upper main body 11 suspended to be elevatable, a lower main body 12 supported at a lower part of the upper main body 11 to be rotatable around a vertical axis, and plural breakers 13 supported at a lower part of the lower main body 12 to be laterally movable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging apparatus suitable for crushing rocks in, for example, standing piles.

[0002]

2. Description of the Related Art In civil engineering and construction work, when a shaft is constructed, in order to prevent collapse of a hole wall, for example, a steel pipe such as a large diameter steel pipe or a concrete pile is put underground using a steel pipe press-fitting device. Excavation is carried out by discharging the inner soil and the like while press-fitting. Usually, excavation and discharge of earth and sand are performed by grasping with an openable / closable bucket suspended by a crane. In addition, when steel pipes being pressed hit large rocks, the rocks are crushed by dropping a weight having a sharp tip, and then the rocks are discharged.
However, in this case, vibration and noise are generated, and a problem of construction pollution occurs. On the other hand, conventionally, as shown in FIG. 7, a shovel type excavator 51 is known. This excavator 51
In the figure, a breaker 54 is attached to a shovel arm 53 extending forward of a traveling body 52. And breaker 5
4, the breaker 54 is actuated by applying the weight of the traveling body 52 to the ground via the shovel arm 53 as much as possible, and the ground is hit to perform the crushing operation.

[0003]

In the case of the above-mentioned conventional excavator, if the excavation surface is substantially at the same level as the traveling body 52, construction can be performed without any trouble. For excavation, there is a problem that the shovel arm 53 and the steel pipes interfere with each other, making construction difficult or impossible.
An object of the present invention is to eliminate such a conventional problem, and an object of the present invention is to provide an excavator capable of excavating at a deep place such as a bottom of a shaft.

[0004]

In order to solve the above-mentioned problems, a first aspect of the present invention is directed to an upper body suspended in a vertically movable manner, a lower body supported at a lower portion of the upper body, and a lower body supported by the lower body. The lower portion has a plurality of breakers supported so as to be movable in the lateral direction.

[0005] A second invention is directed to an upper body suspended from the upper body, a lower body rotatably supported on a lower part of the upper body about a vertical axis, and a lower part of the lower body. It is configured to include a plurality of breakers supported to be movable in the lateral direction.

Further, in the third invention, in addition to the structure of the first invention or the second invention, the upper main body has a projecting means which protrudes from the outer peripheral surface and retreats.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an excavator 1 according to first and second aspects of the present invention. The excavator 1 generally includes an upper main body 11, a lower main body 12, and a breaker 13. The upper body 11 includes an upper frame 21 suspended so as to be able to move up and down, a motor 22 having an output shaft protruding below the upper frame 21, and a drive gear 23 attached to the output shaft so as to be integrally rotatable therewith. And a driven gear 24 rotatably supported below the upper frame 21 about an axis parallel to the output shaft and meshing with a driving gear 23.

The lower body 12 has a lower frame 27 that is rotatably mounted integrally with the driven gear 24 below the driven gear 24.
And a plurality of, for example, two supports 28 movably provided in a direction parallel to the rotation surface of the lower frame 27, and expansion / contraction means 29 for moving each support 28, for example, a hydraulic cylinder, and a weight 30. Have. Breaker 13
The driving unit 31 includes a driving unit 31 coupled to each support 28, and a conical chisel 32 projecting below the driving unit 31 and vibrated in the axial direction by the driving unit 31.

Next, the operation of the excavator 1 will be described with reference to FIGS. For example, when the steel pipes B are pressed into the ground by the steel pipes press-in device A, the excavator 1 is used together with the crane D provided on the traveling body C.
First, the excavator 1 suspended by the crane D is lowered to the excavation surface in the steel pipes B. Then, the chisel 32 is vibrated up and down under the state where the weight of the upper main body 11 and the lower main body 12 is applied to the breaker 13 to break the excavated surface. When this operation is completed, the excavator 1 is raised to a height at which the chisel 32 is separated from the excavation surface, the motor 22 is operated, and the lower main body 1 is moved relative to the upper main body 11.
2 is rotated by a desired angle. Subsequently, the excavator 1 is lowered to the excavation surface, and the excavation surface is crushed by the breaker 13 as described above. Thereafter, by repeating this work, rock drilling and excavation work can be performed by the breaker 13 at any number of places along substantially the same circumference as necessary.

Further, rocking and excavating work can be performed over the entire excavation surface in the steel pipes B by contracting or extending the expanding and contracting means 29 by a desired amount and repeating the above-described operation. Note that the first invention is not limited to a device in which the lower main body 12 is relatively rotated with respect to the upper main body 11 by using the motor 22, the driving gear 23, and the driven gear 24 as described above. The present invention also includes a device in which the lower body 12 is simply provided so as to be rotatable relative to the upper body 11 and the lower body 12 is rotated with respect to the upper body 11 manually.

In addition, the first invention provides an apparatus in which the upper main body 11 supports the lower main body 12 so as to rotate integrally therewith, and the upper main body 11 and the lower main body 12 are manually rotated together. In this case, the upper body 11 is not suspended by two wires through pulleys as shown in the drawing, but the upper body 11 is suspended by a hook suspended by one wire. It is preferable to carry it. Further, neither the first invention nor the second invention is limited to the device in which the breaker 13 is laterally moved by the expansion / contraction means 29, and includes a device in which the breaker 13 is laterally moved by hand.

FIG. 6 shows the state of use of the excavator 2 according to the third invention. Portions common to those shown in FIGS. 1 to 4 are assigned the same reference numerals, and descriptions thereof are omitted. The excavator 2 has a plurality of overhanging members 41 on the upper body 11 that advance and retreat in a direction normal to the side surface of the upper body 11. Then, as shown in FIG.
Is operated, the overhang member 41 is pressed against the inner peripheral surface of the steel pipes B, and the upper main body 11 and the lower main body 12 are firmly fixed. This overhang member 41
Is driven, for example, directly by a hydraulic cylinder (not shown) or via a link mechanism.

The weight 30 is not always necessary, and can be omitted by increasing the weight of the upper frame 21 or the lower frame 27 itself. Further, the weight 30 may be provided on the upper frame 21 instead of the lower frame 27. Further, the present invention does not limit the number of breakers 13 at all.

[0014]

As is apparent from the above description, according to the first aspect of the present invention, the upper main body is suspended so as to be able to move up and down, the lower main body supported at the lower portion of the upper main body, and the lower main body. It is configured to include a plurality of breakers supported at the lower part so as to be movable in the lateral direction. For this reason, there is an effect that the work can be performed even when excavating a narrow and deep place, for example, a place such as a bottom in a shaft or a steel pipe pressed into the ground.

According to the second aspect of the present invention, the upper main body is suspended so as to be able to move up and down, the lower main body rotatably supported on the lower part of the upper main body about a vertical axis, and the lower main body. And a plurality of breakers that are supported movably in the lateral direction at the lower part of the vehicle. For this reason, there is an effect that it is possible to safely and efficiently perform the above-described excavation work in a narrow and deep place even from a remote position.

According to the third invention of the present application, in addition to the structure of the first invention or the second invention, the upper body has a projecting means which protrudes from the outer peripheral surface and retreats. For this reason, in addition to the effect of the first invention or the second invention, there is an effect that it is possible to stably and strongly hit the excavation surface from the breaker.

[Brief description of the drawings]

FIG. 1 is a front view of an excavator according to first and second inventions of the present application.

FIG. 2 is a plan view of the excavator shown in FIG.

FIG. 3 is a side view of the excavator shown in FIG.

FIG. 4 is a front view showing a use state of the excavator shown in FIG.

FIG. 5 is a cross-sectional view showing a state when the excavator shown in FIG. 1 is operated.

FIG. 6 is a cross-sectional view showing a state during operation of the excavator according to the third invention of the present application.

FIG. 7 is a front view showing a state when a conventional breaker is used.

[Explanation of symbols]

 1, 2 Excavator 11 Upper body 12 Lower body 13 Breaker 41 Overhang member

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[Procedure amendment]

[Submission date] February 25, 2000 (200.2.2
5)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG. 2

FIG. 7

FIG.

FIG. 3

FIG. 4

FIG. 5

FIG. 6

Claims (3)

[Claims] An upper body is suspended so as to be able to move up and down, a lower body supported at a lower portion of the upper body, and a plurality of breakers supported at a lower portion of the lower body so as to be movable in a lateral direction. A drilling rig, characterized in that: 2. An upper body which is suspended so as to be able to move up and down, a lower body which is rotatably supported by a lower part of the upper body about a vertical axis, and which can be moved laterally at a lower part of the lower body. An excavator, comprising: a plurality of breakers supported on the excavator. 3. The excavator according to claim 1, wherein the upper main body has a projecting means that protrudes from an outer peripheral surface thereof and retreats.